WSA 113 RC Pipe With Flexible TPL Issue 1

INDUSTRY STANDARD FOR

REINFORCED CONCRETE PIPES

WITH FLEXIBLE

THERMOPLASTIC LININGS

WSA 1132002

W A T E R S E R V I C E S A S S O C I A T I O N

o f A u s t r a l i a

WSA 1132002

Issue 1 Rev 0 COPYRIGHT 31 Jan 2002

1

PREFACE

This Standard was prepared by Power and Water Authority of the Northern Territory with the assistance of the Water Corporation of Western Australia for the Water Services Association of Australia (WSAA). WSAA also acknowledges the significant technical input of CSR Humes.

The objective of this Standard is to provide design, manufacturing and performance requirements for manufacturers of thermoplastic lined reinforced concrete pipes. Given that a standard for this product is not available from other overseas standards organisations, it is likely that further improvements to this initial standard may be necessary as experience is gained with its use.

Attention is drawn to the proposed publication of WSAA Rulings to this Standard. Where rulings of public significance are issued, they will be available from the WSAA website http://www.wsaa.asn.au/. When rulings are included in an amendment, the specific ruling will be withdrawn at the time of publication of the amendment. Inquiries should be directed to WSAA Sydney Office.

WSAA also invites comments and suggestions for amendments to this Standard. Please email to [email protected].

WSAA proposes to submit this Standard to Standards Australia International for development into an Australian Standard.

Statements expressed in mandatory terms in notes to tables and figures are deemed to be requirements of this Standard.

The terms normative and informative have been used in this Standard to define the application of the appendix to which they apply. A normative appendix is an integral part of a Standard, whereas an informative appendix is only for information and guidance.

This Standard will be withdrawn upon publication of an Australian Standard for thermoplastic lined reinforced concrete pipe.

Comments should be forwarded to:

National Codes Manager

Water Services Association of Australia

GPO Box 5420, Sydney, NSW, 2001, Australia

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CONTENTS

page

PREFACE ...................................................................................................................................1

SECTION 1 SCOPE AND GENERAL .......................................................................................5 1.1 SCOPE..................................................................................................................................5 1.2 REFERENCED DOCUMENTS ..............................................................................................5 1.3 DEFINITIONS........................................................................................................................6

1.3.1 Lining arc ......................................................................................................................6 1.3.2 Lining blanket ................................................................................................................6 1.3.3 Lining continuity ............................................................................................................6 1.3.4 Lining defect..................................................................................................................6 1.3.5 Lining keys ....................................................................................................................6 1.3.6 Lining sheet...................................................................................................................6

SECTION 2 MATERIALS AND COMPONENTS ......................................................................7 2.1 GENERAL .............................................................................................................................7 2.2 REINFORCED CONCRETE PIPE MATERIALS....................................................................7 2.3 LINING MATERIAL................................................................................................................7

2.3.1 PVC...............................................................................................................................7 2.3.2 PE .................................................................................................................................7

2.4 LINING COMPONENTS ........................................................................................................7 2.5 LINING COLOUR ..................................................................................................................7 2.6 LINING SHEET PHYSICAL PROPERTIES ...........................................................................8 2.7 LINING SHEET CHEMICAL RESISTANCE PROPERTIES...................................................8

2.7.1 General .........................................................................................................................8 2.7.2 Specimens for change in mass tests.............................................................................8 2.7.3 Short Term Chemical Resistance..................................................................................8 2.7.4 Long Term Chemical Resistance ..................................................................................9

2.8 LINING COMPONENTS DEFECTS.......................................................................................9

SECTION 3 DESIGN AND MANUFACTURE .........................................................................11 3.1 REINFORCED CONCRETE PIPE.......................................................................................11 3.2 LINING SHEET AND COMPONENTS.................................................................................11

3.2.1 LINING SHEET KEYS.................................................................................................11 3.2.2 LINING COMPONENTS DIMENSIONS ......................................................................11

3.2.2.1 Lining Sheets .....................................................................................................11 3.2.2.2 Welding Strips....................................................................................................12 3.2.2.3 Joint Strips .........................................................................................................12 3.2.2.4 Lining Blankets...................................................................................................12

3.2.3 LINING SHEET WEIGHT ............................................................................................12 3.2.4 PIPE LINING FABRICATION ......................................................................................12 3.2.5 LINING ARC................................................................................................................12

3.3 LINING OF PIPE .................................................................................................................13 3.3.1 LINING OF HORIZONTALLY CAST PIPE...................................................................13 3.3.2 LINING OF VERTICALLY CAST PIPE ........................................................................13

3.4 WELDER QUALIFICATIONS ..............................................................................................14

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SECTION 4 PERFORMANCE REQUIREMENTS ..................................................................15 4.1 GENERAL ...........................................................................................................................15 4.2 LINING KEY PULL-OUT RESISTANCE ..............................................................................15 4.3 LINING CONTINUITY..........................................................................................................15 4.4 LINING KEY EMBEDMENT.................................................................................................15 4.5 LINING FINISH....................................................................................................................15 4.6 JOINT LAP TENSILE STRENGTH ......................................................................................15 4.7 CONCRETE DEFECTS.......................................................................................................15

SECTION 5 SECTION 5 MARKING AND PACKAGING ..................................................17 5.1 LINING SHEET MARKING ..................................................................................................17 5.2 PIPE MARKING ..................................................................................................................17 5.3 PACKAGING .......................................................................................................................17 5.4 INSTALLATION INSTRUCTIONS .......................................................................................17

APPENDIX A PURCHASING GUIDELINES .............................................................................18 A1 SCOPE ................................................................................................................................18 A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER .................................................18 A3 INFORMATION TO BE SUPPLIED BY THE MANUFACTURER..........................................18

APPENDIX B MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD......19 B1 SCOPE ................................................................................................................................19 B2 RELEVANCE .......................................................................................................................19 B3 PRODUCT CERTIFICATION ...............................................................................................19 B4 TESTING .............................................................................................................................19

B4.1 GENERAL....................................................................................................................19 B4.2 RETESTING ................................................................................................................19 B4.3 REJECTION AFTER RETEST.....................................................................................20

B5 DEFINITIONS ......................................................................................................................21 B5.1 ACCEPTABLE QUALITY LEVEL (AQL).......................................................................21 B5.2 MATERIAL OR COMPOUND BATCH..........................................................................21 B5.3 PIPE BATCH ...............................................................................................................21 B5.4 PRODUCTION BATCH................................................................................................21 B5.5 LOT..............................................................................................................................22 B5.6 SAMPLE ......................................................................................................................22 B5.7 SAMPLING PLAN ........................................................................................................22 B5.8 PROCESS VERIFICATION TEST (PVT) .....................................................................22 B5.9 BATCH RELEASE TEST (BRT)...................................................................................22 B5.10 TYPE TESTING (TT) .................................................................................................22 B5.11 NEW FORMULATION................................................................................................22

APPENDIX C LINING KEY PULL-OUT RESISTANCE.............................................................23 C1 SCOPE ................................................................................................................................23 C2 PRINCIPLE..........................................................................................................................23 C3 APPARATUS .......................................................................................................................23 C4 PROCEDURE......................................................................................................................23 C5 TEST REPORT....................................................................................................................24

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APPENDIX D LINING CONTINUITY.........................................................................................25 D1 SCOPE ................................................................................................................................25 D2 PRINCIPLE..........................................................................................................................25 D3 APPARATUS .......................................................................................................................25 D4 PROCEDURE......................................................................................................................25 D5 TEST REPORT....................................................................................................................26

APPENDIX E LINING DEFECTS AND REPAIR .......................................................................27 E1 DEFECTS CLASSIFICATION ..............................................................................................27 E2 DEFECTS TO BE REPAIRED..............................................................................................27 E3 WELDING STRIPS FOR REPAIR........................................................................................27 E4 REPAIR METHODS.............................................................................................................27

E4.1 Pinholes, Cuts and Tears.............................................................................................27 E4.2 Damaged Sections.......................................................................................................27 E4.3 Short Incomplete Welds...............................................................................................28 E4.4 Long Incomplete Welds ...............................................................................................28 E4.5 Charred and Overheated Welds ..................................................................................28 E4.6 Unembedded Keys and Lining Depressions and Projections.......................................28

E5 WELDING STRIP PULL TEST.............................................................................................28

APPENDIX F HANDLING, STORAGE AND TRANSPORT ......................................................29

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S E C T I O N 1 S C O P E A N D G E N E R A L

1.1 SCOPE

This standard applies to the manufacture of reinforced concrete pipes with flexible thermoplastic lining sheet for the purpose of protecting the concrete from corrosion in aggressive sewage environments. This standard applies to pipe sizes DN 600 and larger and to linings having flaps to overlap joints and thus provide continuous corrosion protection.

1.2 REFERENCED DOCUMENTS

The following documents are referred to in this standard:

AS

1199 Sampling procedures and tables for inspection by attributes

1741 Vitrified clay pipes and fittings with flexible jointsSewer quality

2758 Aggregates and rock for engineering purposes 2758.1 Concrete aggregates

3735 Supp 1

Concrete structures for retaining liquidsCommentary (Supplement to AS 3735-1991)

3894 Site testing of protective coatings 3894.1 Non-conductive coatingsContinuity testingHigh voltage (brush) method

4058 Precast concrete pipes (pressure and non-pressure)

ISO

37 Rubber, Vulcanized and ThermoplasticDetermination of Tensile StressStrain Properties

62 PlasticDetermination of Water Absorption (Equivalent to ASTM D 570)

175 PlasticsDetermination of Resistance to Liquid Chemicals

176 Determination of the Loss of Plasticizers from Plastics by the Activated Carbon Method

178 PlasticsDetermination of Flexural Properties of Rigid Plastics

527-1 PlasticsDetermination of Tensile PropertiesPart 1: General Principles (Equivalent to ASTM D 638)

868 PlasticsDetermination of Indentation Hardness of Means of a Durometer: Shore Hardness

1043-1 Plastics SymbolsBasic Polymers and their special characteristics 1043-2 Plastics SymbolsFillers and Reinforcing Materials 1043-3 Plastics SymbolsPlasticizers

2039-1 PlasticsDetermination of HardnessPart 1: Ball Indentation Method 2039-2 PlasticsDetermination of HardnessPart 2: Rockwell Hardness

4599 PlasticsDetermination of Resistance to Environmental Stress Cracking (ESC)Bent Strip Method

4661-1 Rubber, vulcanized or thermoplasticPreparation of samples and test piecesPart

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1: Physical Tests

ASTM

A276 Standard specification for stainless and heat-resisting steel bars and shapes

D412 Standard Test Method for Vulcanized Rubber and Thermoplastic Rubbers and Thermoplastic Elastomers - Tension (References ISO 37)

D543 Standard Practice for Evaluating the Resistance of Plastics to Chemical Reagents (References ISO 175 and ISO 4599)

D570 Standard Test Method for Water Absorption of Plastics (Equivalent to ISO 62)

D1004 Standard Test Method for Initial Tear Resistance of Plastic Film and Sheeting (No similar/equivalent ISO standard)

D1203 Standard Test Method for Volatile Loss from Plastics Using Activated Carbon Methods (Similar but not technically equivalent to ISO 176)

D2240 Test Method for Rubber propertyDurometer Hardness (Equivalent to ISO 868)

BS

5911-100

Precast concrete pipes, fittings and ancillary productsPart 100: Specification for Unreinforced and reinforced pipes and fittings with flexible joints

1.3 DEFINITIONS

For the purpose of this standard, the definitions below apply:

1.3.1 Lining arc

The circumference of the pipe over which a thermoplastic lining blanket is applied. The lining arc includes at least the surface above the minimum sewage or effluent flow level at any time in the life of the pipeline.

1.3.2 Lining blanket

The one piece lining for the pipe fabricated by cutting and welding of standard size and part size thermoplastic sheets.

1.3.3 Lining continuity

The quality of a lining that determines its freedom from those defects which increase its electrical conductivity.

1.3.4 Lining defect

A detectable weakness or discontinuity in the lining, which causes its ability to protect the substrate from corrosion to be suspect during the normal service life.

1.3.5 Lining keys

Extensions or profiles on one face of the lining sheet for the purpose of securing the lining to the concrete pipe.

1.3.6 Lining sheet

Lining of sizes as manufactured by extrusion and from which pipe lining blankets are cut or fabricated and miscellaneous pipe lining accessory components are cut.

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S E C T I O N 2 M A T E R I A L S A N D C O M P O N E N T S

2.1 GENERAL

Thermoplastic sheet for lining of reinforced concrete pipe shall provide an impervious barrier to liquids and gases and be inert to the sewage environment in which it is used.

Concrete constituents shall be chosen with consideration to the aggressiveness of the external environment and where not fully lined, the aggressiveness of any sewage having industrial discharge.

Where ASTM test methods are specified, the equivalent ISO test method may be used with the written agreement of the Purchaser. Equivalent ISO test methods shall be as nominated in Clause 1.3.

NOTE: Sulphate resisting (Type SR) cement provides resistance to neutral sulphates in soils and ground water. Coarse and fine calcareous aggregates combined with increased cover to reinforcement reduce the rate of concrete attack in acidic ground and sewage conditions. Refer to AS 3735 Supplement 1 for further guidance on materials selection for reinforced concrete durability in aggressive environments.

2.2 REINFORCED CONCRETE PIPE MATERIALS

Materials for manufacture of reinforced concrete pipe shall be in accordance with AS 4058. Material options defined in the purchasing guidelines in AS 4058 shall be in accordance with the purchasers specification and this clause.

Reinforcing nibs shall be stainless steel grade 304 or 316 to ASTM A 276.

Aggregates to AS 2758.1 shall be either normal weight or heavy weight, fine or coarse and shall have a maximum water absorption of 2.5%, and durability for concrete exposure classification C.

Cement shall be sulphate resisting (Type SR) except where pipes are to be used in marine environments or where otherwise specified by the purchaser.

2.3 LINING MATERIAL

2.3.1 PVC

The PVC compound used for lining components shall comprise of high molecular weight polyvinyl chloride combined with plasticisers, stabilisers and pigments so as to be permanently flexible. Polyvinyl chloride shall constitute not less than 99% by mass of the resin used. The PVC compound shall not contain copolymer resins or fillers such as calcium carbonate.

2.3.2 PE

The polyethylene compound used for lining components shall comprise of linear low density polyethylene (LLDPE) unless otherwise specified.

2.4 LINING COMPONENTS

Components for thermoplastic lining systems for reinforced concrete pipe shall comprise of fabricated sheet blankets as well as accessories such as joint strip and welding strip of various configurations.

2.5 LINING COLOUR

Plastic lining shall be white in colour unless otherwise specified by the purchaser.

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NOTE:Note: Visibility for pipeline inspection is improved where a light coloured lining is used. However, non-black lining may suffer ultraviolet degradation with prolonged exposure to sunlight and suitable lining and pipe storage requirements may be required.

2.6 LINING SHEET PHYSICAL PROPERTIES

PVC lining shall comply with the acceptable limits criteria given in Table 2.1 when tested in accordance with the test methods shown.

Table 2.1

PHYSICAL PROPERTY REQUIREMENTS OF PVC

PHYSICAL PROPERTY TEST METHOD ACCEPTABLE LIMITS

Tensile strength (both longitudinal and transverse to key)

ASTM D412 (See Note 1) 17.25 MPa minimum

Elongation at break (both longitudinal and transverse to key)

ASTM D412 (See Note 1) 225% minimum

Hardness Shore Durometer D at 20C ASTM D2240

54 minimum 62 maximum

Plasticiser permanence (24 hours at 90C on 50 mm diameter disc)

ASTM D1203 Method B 1.0% maximum

Water absorption at 24 hours (sample size 75 mm x 25 mm by thickness of sheet)

ASTM D570 0.10% maximum

Water soluble matter at 24 hours ASTM D570 0.05% maximum

Tear strength (both longitudinal and transverse to key)

ASTM D1004 80 N/mm minimum

NOTE:

1 Specimens for tensile testing shall be prepared and tested using Die B.

2.7 LINING SHEET CHEMICAL RESISTANCE PROPERTIES

2.7.1 General

Thermoplastic sheet for lining concrete pipes shall be resistant to sulphuric acid generated by the hydrogen sulphide corrosion cycle of sewage and shall neither contribute to supporting the growth of sewage bacteria and fungi, nor be affected by the enzymes or other end products of such bacteria or fungi.

2.7.2 Specimens for change in mass tests

Specimens for determining change in mass shall be 75 mm x 25 mm and shall all have locking profiles in identical positions.

2.7.3 Short Term Chemical Resistance

Lining test specimens shall be tested to ASTM D543 for change in mass, following exposure to the chemical concentrations given in Table 2.2.

The change in mass shall not exceed the values given in Table 2.2 after 7 days exposure at 20C.

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Table 2.2

SHORT-TERM TEST EXPOSURE SOLUTIONS, CONCENTRATIONS AND ALLOWABLE MASS CHANGE

CHEMICAL SOLUTION CHEMICAL CONCENTRATION

%

ALLOWABLE CHANGE IN MASS AFTER 7 DAYS

%

Sodium hypochlorite

Ferric chloride

Sodium chloride

Sulphuric acid

Nitric acid

Sodium hydroxide

Ammonium hydroxide

Soap detergent solution

(1% as available chlorine)

1

5

20

1

5

5

2

0.20

0.60

0.15

0.12

0.20

0.20

0.40

0.40

2.7.4 Long Term Chemical Resistance

Following initial conditioning to constant mass at 43C and exposure to the chemical solutions given in Table 2.3 for 112 days at 25C 3, lining test specimens shall be tested in accordance with:

(a) ASTM D543 for change in mass; and

(b) ASTM D412 using die B for tensile strength at yield.

The change in mass shall not exceed 1.5% for PVC and 0.5% for PE and the change in the change in tensile strength at yield shall not exceed 15% for PVC and 12% for PE.

Table 2.3

LONG TERM TEST EXPOSURE SOLUTIONS AND CONCENTRATIONS

CHEMICAL SOLUTION1 CHEMICAL CONCENTRATION

% 2

Sulphuric acid

Sodium hydroxide

Ammonia hydroxide

Nitric acid

Ferric chloride

Soap

Detergent (linear, alkyl, benzyl, sulphonate or LAS)

20

5

5

1

1

0.1

0.1

NOTES:

1 All chemical solutions shall have a BOD of not less than 700 ppm.

2 Volumetric percentages of concentrated chemical property grade reagents

2.8 LINING COMPONENTS DEFECTS

Thermoplastic lining components, including lining sheet, joint strip and welding strip shall be free of cracks, cleavages or other defects adversely affecting the protective characteristics and continuity of the lining.

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The lining manufacturer shall inspect all lining components for defects and shall spark test for discontinuities all in accordance with the manufacturers printed procedures. All lining sheet defects shall be repaired in accordance with the lining manufacturers printed procedures. Lining sheet shall be retested and repaired until no defects are present.

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S E C T I O N 3 D E S I G N A N D M A N U F A C T U R E

3.1 REINFORCED CONCRETE PIPE

Reinforced concrete pipe shall be designed and manufactured to AS 4058. Product design options defined in the purchasing guidelines in AS 4058 shall be in accordance with the purchasers specification and the following:

(a) Internal cover to reinforcement shall be 20 mm minimum for horizontally and 25 mm for vertically cast pipe.

(b) Minimum cement content shall be 400 kg/m3.

(c) Materials shall comply with Clause 2.2.

(d) Flexible joint design shall be in accordance with Clause 6.3 of AS 1741.

(e) When tested in accordance with Clause 20.6 and Appendix H of BS 5911-100, each size and type of flexible joint shall sustain without loss of watertightness at the joint the specified internal pressure under the conditions of deflection, straight draw and shear specified in Clauses 20.6.1, 20.6.2 and 20.6.3 of BS 5911-100, respectively.

Pipes shall be either steam cured or water cured. For steam curing, commence a maximum of one hour after completion of plastic lining. Maintain a uniform rate of increase and decrease in pipe temperature until at least 50% of the characteristic compressive strength has been achieved. For water curing, cure continuously for at least seven days and until at least 50% of the characteristic compressive strength has been achieved.

NOTE: Load testing may be undertaken on unlined pipe, of the same materials, design and manufacturing method as plastic lined pipe. External sacrificial layers shall be omitted for load testing.

3.2 LINING SHEET AND COMPONENTS

Thermoplastic lining sheet shall be manufactured from compounds complying with Clauses 2.3, 2.5, 2.6 and 2.7 by extrusion under controlled temperature and pressure conditions.

Thermoplastic lining components shall be manufactured from compounds complying with Clauses 2.4, 2.5, 2.6 and 2.7 by extrusion or injection moulding under controlled temperature and pressure conditions.

3.2.1 LINING SHEET KEYS

One side of the plastic lining sheet shall be designed to have keys, such as ribs, for the purpose of embedding the key into the underlying concrete and permanently retaining the sheet.

Keys shall be spaced at a distance, as appropriate for the lining flexibility, to ensure the lining between the keys does not sag away from the concrete substrate. The top portion of the keys shall be wider in section for the purpose of enhancing resistance to pull-out from the concrete. The keys shall be integral with and of the same composition as the lining sheet.

3.2.2 LINING COMPONENTS DIMENSIONS

3.2.2.1 Lining Sheets

Lining sheet shall be 1.5 to 3 mm thick.

Rib profiles shall be equally spaced at 60 to 70 mm and shall be not less than 9 mm high for lining used with vertically cast pipe and not less than 10 mm high for lining used with horizontally cast pipe.

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The top of the key used for lining horizontally cast pipe shall have a shape that will minimise resistance to insertion into the concrete substrate while providing sufficient pull out resistance.

NOTE:

1 Suitable designs include diamonds or arrows.

2 The top of the key used for lining vertically cast pipe may be of T design to further improve resistance to pull-out.

3.2.2.2 Welding Strips

Flat welding strip used for repairs and sealing of miscellaneous field joints shall be of 25 mm nominal width on the bottom face and 3 mm nominal thickness. Edges shall be bevelled.

3.2.2.3 Joint Strips

Where required, flat joint strips shall be 100 mm nominal width within tolerance of - 0 + 7 mm.

3.2.2.4 Lining Blankets

Lining blankets shall be cut and fabricated to size based on the pipe arc and the pipe length to be lined and length of pipe joint flap for covering the pipe joints.

3.2.3 LINING SHEET WEIGHT

PVC lining sheet shall have a minimum mass of 2.5 kg/m2. PE lining sheet shall have a minimum mass of 2.9 kg/m2.

3.2.4 PIPE LINING FABRICATION

Pipe lining blankets shall be fabricated from standard sheets and/or part sheets by lapping sheets a minimum of 12 mm and applying adequate heat and pressure to the lap, using automatic hot air or high frequency shop welding processes, to produce a continuous welded joint. Sheets for fabricating the lining blanket shall be of dimensions that will minimise the total welding length.

All welding shall be in accordance with the lining manufacturers written instructions for sheet jointing work.

Welded joints shall be free from cracks, separations or incompletely fused weld edges which are visible or which permit entry to an 0.1 mm feeler gauge by more than 3 mm of feeler gauge length.

Transverse flaps provided at the end of pipe lining blankets for pipe joint overlap shall have backing keys removed such that not more than 1 mm height of key remains.

For vertically cast pipe, keying shall be removed up to 40 mm from the end of the inside surface of the pipe section. For horizontally cast pipe, sufficient keying shall be removed to ensure that the keying adjacent to the ends of the pipe barrel will not be closer than 13 mm from the barrel end.

Transverse flaps provided at the spigot end of pipes shall extend at least 100 mm beyond the end of the spigot end face.

Lining blankets for horizontally cast pipes shall be produced so that continuous ribs for keying are circumferentially disposed. Lining for vertically cast pipe shall be produced so that continuous ribs for keying are longitudinally disposed.

3.2.5 LINING ARC

The circumferential arc of pipes to be lined shall be designed to achieve 359 coverage. The tolerance on the actual lining arc achieved shall be +0.5 4.0.

NOTE: The accuracy in achieving a specified lining arc is affected by the tolerance on cutting the lining, the tolerance allowed for the internal diameter and any change in lining length due to temperature change. The last two factors are

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more significant for horizontally cast pipe. Ensuring a specified lining arc is achieved, requires providing a lining to cover that arc for at least the maximum internal diameter that is possible after applying the tolerances allow for in the casting method (and also making allowances for any dimension changes due to temperature variations).

3.3 LINING OF PIPE

3.3.1 LINING OF HORIZONTALLY CAST PIPE

Lining of horizontally cast pipe with the lining blanket shall be undertaken immediately following manufacture of the pipe while the concrete is still green and compliant to allow lining keys to be embedded.

The lining shall be heated to an appropriate temperature so that it may be sufficiently pliant for application while still retaining sufficient rigidity of keys for insertion into the concrete.

Where the lining has continuous ribs for keying, the ribs shall be aligned circumferentially in the pipe so as to allow moisture or fluid accumulating between the lining and the pipe to escape towards the unlined part of the pipe.

Where the lining has continuous ribs, the lining shall be positioned to ensure:

(a) the lining ribs at each lining end are not closer than 13 mm from the barrel end; and

(b) the distance between ribs on either side of a pipe joint will not be greater than 130 mm.

The lining shall be positioned to ensure that any joint flap extends at least 100 mm beyond the end of the inside surface of the spigot.

Where pipes have elliptical steel reinforcing to achieve higher pipe strength on one axis, the gap in the lining sheet shall be equidistant about the nominated pipe invert or the invert of the lined pipe shall be within 10 of true pipe invert.

The lining shall be held in longitudinal tension by suitable means while lining keys are embedded into the concrete substrate so as to ensure there is no wrinkling or bulging of the lining. The keys shall be embedded to ensure the lining is hard against the underlying concrete and that circumferential corrugations on the surface of the liner are within tolerances specified.

Care shall be taken when removing the lining embedment equipment to prevent damage to the lining. Any holes made in the lining for manufacturing purposes shall be clearly marked for weld sealing.

3.3.2 LINING OF VERTICALLY CAST PIPE

Lining for vertically cast pipe shall be placed on the face of the inner mould prior to placement of concrete between the inner and outer moulds.

For 359 lining arcs or less, plastic strips or similar shall be used to hold the ends of the lining arc firmly against the inner mould in order to prevent mortar entering between the lining and the inner mould. The strips shall be secured by screws or similar through the inner mould.

Where the lining is installed as a tube but is not to be a 360 lining, keying shall be removed from the section of lining in the invert that will be later cut away.

Where the lining has continuous ribs for keys, the sheet shall be aligned with the ribs longitudinal to the pipe so as to allow moisture or fluid accumulating between the lining and pipe to escape and to facilitate casting.

The lining shall be positioned to ensure:

(a) the lining keys terminate not more than 40 mm from the end of the inside surface of the pipe section; and

(b) any joint flap extends at least 100 mm beyond the end of the inside surface of the spigot.

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Where pipes have elliptical steel reinforcing to achieve higher pipe strength on one axis, the gap in the lining sheet shall be equidistant about the nominated pipe invert due to reinforcement disposition.

The lining blanket shall be held in tension by plastic or metal bands at the top and bottom of the mould or similar so as to ensure there is no wrinkling or bulging of the lining.

Care shall be taken when removing the inner mould to prevent damage to the lining. Screws, nails or other securing ties through the lining shall be removed with care and without tearing the lining prior to removal of the moulds. Sharp instruments shall not be used to pry the mould from the lining. Any holes made in the lining for manufacturing purposes shall be clearly marked for weld sealing.

All nail and tie holes in the lining blanket made for manufacturing the plastic lined concrete pipe shall be patched in accordance Appendix E and the manufacturers written procedures.

3.4 WELDER QUALIFICATIONS

Manual welding of thermoplastic sheet lining for fabrication and repair shall be carried out by welders who have been accredited by successfully completing the National Plastics and Rubber Industry Training Council Ltd course entitled Plastic welding utilising hot air gun welding techniques on plasticised and unplasticised PVC and PE.

Only approved welding methods shall be used.

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S E C T I O N 4 P E R F O R M A N C E R E Q U I R E M E N T S

4.1 GENERAL

Where ASTM test methods are specified, the equivalent ISO test method may be used with the written agreement of the Purchaser. Equivalent ISO test methods shall be as nominated in Clause 1.3.

4.2 LINING KEY PULL-OUT RESISTANCE

When tested in accordance with Appendix C, the keys on the back of the lining sheet shall resist tearing and pull-out from the concrete and the concrete shall resist spalling when subject to a pull-out load of 1800 kg/m3.

4.3 LINING CONTINUITY

When tested in accordance with Appendix D, continuity of the entire pipe lining and any accessories shall be demonstrated after visual inspection, weld probing and spark testing.

4.4 LINING KEY EMBEDMENT

The lining shall be visually checked for keys not embedded or insufficiently embedded into the concrete substrate. Minor key embedment defects as described in Appendix E shall be acceptable and shall not require repair. Major key embedment defects may be repaired in accordance with Appendix E where approved by the purchaser or the purchasers representative.

4.5 LINING FINISH

The installed plastic lining shall not have corrugations or non circularities or both which reduce the pipe:

(a) Waterway area by more than 1.5%.

(b) Diameter by more than 5 mm for pipe DN 1800 10 mm for pipe >DN 1800.

NOTE: Such tolerances are additional to the dimensional tolerances permitted for unlined concrete pipe to AS 4058.

The unlined section width shall be within the tolerances specified by the purchaser.

Pipe with mortar over the edge of the blanket shall be rejected or otherwise repaired where agreed by the purchaser or the purchasers representative.

The lining ends shall be square with the pipe ends.

4.6 JOINT LAP TENSILE STRENGTH

When tested in accordance with ASTM D412, the joint weld of overlapping sheets in a pipe lining blanket shall withstand a tensile loading of 17.25 MPa.

4.7 CONCRETE DEFECTS

Acceptability and repair of concrete defects in plastic lined concrete pipes shall be in accordance with AS 4058.

Concrete defects causing projections or depressions of the lining of one quarter to one half the cover shall be repaired.

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Pipes shall be rejected where concrete defects cause projections or depressions of the lining greater than one half the cover unless otherwise agreed by the purchaser or the purchasers representative to be repaired.

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S E C T I O N 5 S E C T I O N 5 M A R K I N G A N D P A C K A G I N G

5.1 LINING SHEET MARKING

Lining sheet shall be marked with the batch identification number.

5.2 PIPE MARKING

Pipe shall be marked in accordance with the requirements of AS 4058.

5.3 PACKAGING

Prior to receipt by the purchaser, suitable packaging or protection shall be given to the pipe lining to prevent:

(a) Damage to the lining.

(b) Exposure of the lining to ultraviolet radiation where the lining is not black.

5.4 INSTALLATION INSTRUCTIONS

Printed instructions for transport, handling and storage of plastic lined concrete pipe to minimise damage and deterioration of the plastic lining, and welding of plastic lining at pipe joints and other locations shall be provided by the manufacturer with each delivery of pipes.

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APPENDIX A

PURCHASING GUIDELINES

(Informative)

A1 SCOPE

This Appendix includes the technical provisions necessary for the supply of plastic lined reinforced concrete pipe, but does not contain all the necessary provisions of a contract. In a number of clauses, the purchaser is either asked to state the requirements or is given a choice of optional requirements, and these are contractual matters to be agreed between the purchaser and the manufacturer.

This Appendix also contains detailed explanation, advice and recommendations on the information to be supplied by the purchaser at the time of the enquiry or order. Its aims are to prevent misunderstanding and to result in satisfactory supply of products and services.

A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER

The following information should be supplied by the purchaser:

(a) Arc of pipe to be lined, e.g. 359 0.5.

(b) The requirements for lining joint flap, including length of flap.

(c) The colour of the lining. The default colour is black if not otherwise specified.

(d) The number of pipes to be lined and the respective nominal sizes, load classes, effective pipe lengths and joint type.

(e) The type of cement and aggregates to be used for pipe manufacture, cover to reinforcement and any requirements for admixtures.

A3 INFORMATION TO BE SUPPLIED BY THE MANUFACTURER

At the time of tendering, the pipe manufacturer should state the following:

(a) The thickness of the lining sheet in mm.

(b) The spacing of keys on the back of the lining sheet in mm.

(c) The dimensions of the keys in mm.

(d) The size of sheets from which the pipe lining is fabricated in mm.

(e) The method of pipe manufacture.

(f) The method of casting the lining with the pipe.

(g) The method for curing the pipe.

(h) The methods of transporting, handling and storing the pipes

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APPENDIX B

MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD

(Normative)

B1 SCOPE

This Appendix sets out two means by which compliance with this Standard shall be demonstrated by a manufacturer:

(a) The use of a product certification scheme.

(b) The use of a minimum sampling and testing frequency plan.

B2 RELEVANCE

The long-term performance of pipeline systems is critical to the operating efficiency of water agencies in terms of operating licences and customer contracts. The long-term performance of plumbing systems is similarly critical to the durability of building infrastructure, protection of public health and safety and protection of the environment. Product certification schemes provide independent assurance of the claim by the manufacturer that products comply with standards and are thereby fit for their intended use in pipeline and plumbing systems

B3 PRODUCT CERTIFICATION

The certification scheme shall meet the criteria described in SAA HB18.28/SANZ HB18.28 (ISO/IEC Guide 28) in that, as well as full type testing from independently sampled production and subsequent verification of conformance, it requires the manufacturer to maintain effective planning to control production.

The certification scheme serves to indicate that the products consistently conform to the requirements of this Standard.

Product certification shall be conducted by a certification body accredited by the Joint Accreditation System for Australia and New Zealand (JAS-ANZ) or by another accreditation body that is acceptable to JAS-ANZ.

The frequency of the sampling and testing plan as detailed in Paragraph B4.1 shall be used by the certifying body for product compliance auditing. However, where the manufacturer can demonstrate adequate process control to the certifying body, the frequency of sampling and testing nominated in the manufacturer's quality plan and/or documented procedures shall take precedence for the purpose of product certification.

B4 TESTING

B4.1 GENERAL

Table B4.1 sets out the minimum sampling and testing frequency plan for a manufacturer to demonstrate compliance of product(s) to this Standard.

B4.2 RETESTING

In the event of a test failure, the products manufactured since the previous test(s) conforming to the requirements outlined in Table B4.1 shall be quarantined as a batch. A further set of samples shall be selected randomly from the quarantined batch using a sampling plan to AS 1199 for an acceptable quality level (AQL) of 2.5 and an inspection level of S3, unless otherwise specified. If the retest requirements are met, the batch may be released and compliance with this Standard for the quarantined batch may be claimed.

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Should a failure on retesting occur, then the quarantined batch shall be rejected and claims and/or marking indicating compliance to this Standard shall be suspended until the cause of the failure has been identified and corrected.

B4.3 REJECTION AFTER RETEST

In the event of a quarantined batch being rejected after retesting in accordance with the procedures set out in Paragraph B4.2, it may be subjected to 100% testing for the failed requirement(s), and only those items found to comply may be claimed and/or marked as complying with this Standard.

TABLE B4.1

MINIMUM SAMPLING FREQUENCY FOR TESTING AND INSPECTION

CHARACTERISTIC CLAUSE REQUIREMENT TEST METHOD FREQUENCY

Type Tests

Materials

2.3

PVC or PE composition (Conformance or test certificates)

Relevant material standard Every 5 years or at any change in material formulation

Hardness Shore Durometer

Tensile strength ASTM D412

Elongation at break ASTM D412

Plasticiser permanence ASTM D1203 Method B

Water absorption ASTM D570

Water soluble matter ASTM D570

2.5

Tear strength ASTM D1004

2.6.4 Chemical resistance ASTM D543 and Cl 2.6.4 for

long term requirements

Base sheet for lining

2.7 Lining components defects

Inspection and spark test to Appendix D

Every 5 years or at any change in material formulation or design

3.4.1 Lining sheet thickness

3.4.1 Lining sheet profile

3.4.2 Welding strip

Dimensions

3.4.3 Joint strip

Measuring devices (tape, micrometer etc)

At any change in material formulation or design

4.5 Joint lap tensile strength ASTM D412

Overlap dimension Measuring tape

Lining fabrication

3.6 Lining blanket continuity Inspection and spark test to Appendix D

At any change in material formulation or design

4.1 Lining pull-out resistance Appendix C

4.2 Installed lining blanket continuity


4.3 Key embedment depth Measuring devices

Performance Tests

4.4 Lining finish Measuring devices

Every 5 years or change in material formulation or lining design

CHARACTERISTIC CLAUSE REQUIREMENT TEST METHOD FREQUENCY

Batch Release Tests

Materials 2.2

PVC or PE composition (Conformance or test certificates)

Relevant material standard Per material batch

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Base sheet for lining 2.7

Lining components defects


Each sheet

Lining sheet thickness 3.4.1

Lining sheet keys

1 in 20 sheets

3.4.2 Welding strip

Dimensions

3.4.3 Joint strip

Measuring devices (tape, micrometer etc)

1 in 20 strips

Overlap dimension

Key removal at lining ends

Lining length

Lining width (pipe arc)

Measuring tape 3.6

Lining blanket continuity Inspection and spark test to Appendix D

Each sheet

Lining fabrication

4.5 Joint lap tensile strength ASTM D412 1 in 20 sheets

4.1 Lining pull-out resistance Inspection and spark test to

Appendix D Four successive pipes from initial production batch

4.2 Installed lining blanket continuity

Appendix D

4.3 Key embedment depth Measuring devices

Performance Tests

4.4 Lining finish Measuring devices

Each pipe

Process Verification Tests

4.1 Lining pull-out resistance Appendix C 1 from first 40 pipes of each pipe size and load class

4.5 Joint lap tensile strength ASTM D412 1 in 100 lining

blankets

Production Quality Control Tests (also Performance type

tests)

2.6.3 Chemical resistance ASTM D543 and Cl 2.6.3 for

short term requirements 1 in 500 lining sheets

B5 DEFINITIONS

B5.1 ACCEPTABLE QUALITY LEVEL (AQL)

When a continuous series of lots or batches is considered, the quality level which for the purpose of sampling inspection is the limit of a satisfactory process average (see ISO 2859-1 and ISO 3951)

NOTE: The designation of an AQL does not imply that a manufacturer has the right knowingly to supply any non-conforming unit of product.

B5.2 MATERIAL OR COMPOUND BATCH

A clearly identifiable quantity of a particular material or compound.

B5.3 PIPE BATCH

Schedule of pipes, all the same design, nominal length and thickness, manufactured from the same batch of concrete on the same machine or identical moulds. The batch is defined by the pipe manufacturer.

B5.4 PRODUCTION BATCH

A clearly identifiable collection of units, manufactured consecutively or continuously under the same conditions, using material or compound to the same specification.

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B5.5 LOT

A clearly identifiable sub-division of a batch for inspection purposes.

B5.6 SAMPLE

One or more units of product drawn from a batch or lot, selected at random without regard to quality.

NOTE: The number of units of product in the sample is the sample size.

B5.7 SAMPLING PLAN

A specific plan that indicates the number of units of components or assemblies to be inspected.

B5.8 PROCESS VERIFICATION TEST (PVT)

A test performed by the manufacturer on materials, components, joints or assemblies at specific intervals to confirm that the process continues to be capable of producing components conforming to the requirements given in the relevant standard.

NOTE: Such tests are not required to release batches of components and are carried out as a measure of process control.

B5.9 BATCH RELEASE TEST (BRT)

A test performed by the manufacturer on a batch of components, which has to be satisfactorily completed before the batch can be released.

B5.10 TYPE TESTING (TT)

Testing performed to prove that the material, component, joint or assembly is capable of conforming to the requirements given in the relevant standard.

B5.11 NEW FORMULATION

A variation in the formulation of any component material used in any part of the product or a variation in the formulation of a composite material due to the variation in the quantity of component materials or the structure of the composite.

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APPENDIX C

LINING KEY PULL-OUT RESISTANCE

(Normative)

C1 SCOPE

This Appendix sets out a method for determining the resistance of the lining to being detached from the underlying concrete substrate following curing of the concrete pipe.

C2 PRINCIPLE

A pull off load is applied to the thermoplastic pipe lining for a specified period to determine whether the lining will be retained fastened to the concrete pipe wall by the keys on the back of the lining.

C3 APPARATUS

The following apparatus is required:

(a) An appropriate clamp to attach to the lining for the purpose of applying a load

(b) Loading apparatus capable of applying a force of 17.5 N per lineal mm length of key

(c) A suitable marker, such as chalk or a spirit pen and of contrasting colour to the lining, e.g. white where lining is black, for marking the location of defects on the lining.

C4 PROCEDURE

(a) Condition the pipe for at least 48 h prior to testing at an ambient temperature of 20 to 27C.

(b) Test under ambient temperature of 20 to 27C at least 14 days after lining of pipe.

(c) At the mid length of the pipe diametrically opposite the invert, mark a lining test area to be cut being 40 to 50 mm either side of a ribbing key or a line of individual keys and 100 to 200 mm long.

(d) Make two knife cuts parallel to and 40 to 50 mm either side of a rib type key or a line of individual keys and 100 to 200 mm long. Where the key is a rib, use an abrasive wheel cutter to make two transverse cuts at the ends of the knife cuts deep enough to severe the ribs. Otherwise, where the keys are individual use a knife for the transverse cut.

(e) Examine the surface of the concrete under the cut lining and record the type and number of defects.

(f) Attach a clamp to the cut lining test area.

(g) Apply a force of 17.5 N per lineal mm of key length to the clamp, perpendicularly to the liner and maintain for 1 minute.

(h) Remove the load and clamp and examine the lining test area keying.

(i) At 0.6 to 0.9 m from the mid-length towards the spigot and diametrically opposite the invert repeat the preparation and testing described in c) to h) above.

(j) At 0.6 to 0.9 m from the mid-length towards the socket and diametrically opposite the invert repeat the preparation and testing described in c) to h) above.

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(k) Where in any of the test locations, the lining pulls away from the underlying concrete and indicates movement or breakage of the retaining key or spalling of the concrete, the test will have been failed.

(l) Progressively extend pull-out testing away from the failed key area so as to determine the extent of on conforming key embedment.

(m) Repair of the test pipe shall be permitted where the non-conforming key embedment area is less than 0.05 m2 in any single pullout location.

(n) Repair concrete defects or reject pipe in accordance with the defects acceptability and repair requirements in AS 4058.

C5 TEST REPORT

The test report shall include the following:

(a) Production batch from which the pipe was taken.

(b) Date of test.

(c) Locations at which the key failed.

(d) The nature of the failure, e.g. movement of the key, breakage of the key, spalling of the concrete.

(e) Reference to this test method.

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APPENDIX D

LINING CONTINUITY

(Normative)

D1 SCOPE

This Appendix sets out a method for determining the presence of defects in the lining, such as pin holes, tears and weld failures, which would prevent the lining from providing a barrier to concrete corrosion.

D2 PRINCIPLE

A pipe lining is firstly visually inspected for defects and then subsequently tested, using a calibrated spark testing instrument, for discontinuities that may cause the lining to be ineffective in preventing corrosion of the underlying concrete.

D3 APPARATUS

The following apparatus is required:

(a) Spark testing equipment calibrated to 20 000 V and according with the requirements of Clause 7 of AS 3894.1.

(b) An approved weld probing device such as a 0.15 mm feeler gauge or a blunt screwdriver.

(c) A suitable marker, such as chalk or a spirit pen and of contrasting colour to the lining, e.g. white where lining is black, for marking the location of defects on the lining.

D4 PROCEDURE

(a) Inspect the lining carefully for visible defects, such as cuts, tears, or cracks and open or incompletely fused welds.

(b) Probe all welds with the probing device to determine all defective welds requiring rewelding, i.e. weak welds and welds where the probe enters more than 3mm.

(c) Identify all defects with the marker and determine whether there any major defects. Minor defects are defined in Appendix E.

(d) Where there are major defects reject the lining or lined pipe unless otherwise agreed by the purchaser or the purchaser representative that the defects may be repaired.

(e) Where all detected defects are minor, repair defects using qualified welders in accordance with Appendix E and the manufacturers printed procedures.

(f) If any charring of welds occurs during repair due to overheating, replace all charred sections in accordance with Appendix E and the manufacturers printed procedures.

(g) Ensure that the spark testing equipment has been calibrated within the last 12 months in accordance with Appendix C of AS 3894.1.

(h) Allow 20 minutes for the spark testing instrument to reach equilibrium conditions with the environment. The 20 minutes is to include 10 minutes for warming up the instrument after it is switched on.

(i) Ensure the surface of the lining is dry with an absence of condensation.

(j) Adjust the voltage of the spark testing equipment to 15000 +1000 0 volts.

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(k) Secure an earth connection to an exposed section of pipe reinforcement.

(l) Pass the brush electrode over the pipe lining at a rate of not greater than 0.3 m/s maintaining contact between the electrode and the test area, using an appropriate motion.

(m) Where the instrument indicates a discontinuity determine the exact location of the discontinuity (do not hold electrode stationary against the surface) and clearly identify it on the test surface with the marker.

(n) Continue testing until the whole of the lining has been assessed.

(o) Count and record the number of discontinuities found, expressing them as defects per square metre of total lining area.

(p) Where there is more than one discontinuity per square metre, undertake repair only with the approval of the purchaser or purchasers representative.

(q) Undertake repair of discontinuities using qualified welders in accordance with Appendix E and the manufacturers printed procedures.

(r) Repeat spark testing and repair {steps g) to m) and p)} until there are no discontinuities detected.

D5 TEST REPORT

The test report shall include the following:

(a) Production batch from which the pipe was taken.

(b) Date of test.

(c) Description of the spark testing equipment and calibration details.

(d) Voltage selected to conduct the continuity test and calibration details.

(e) For each pipe tested, the number of lining defects and the nature of each defect.

(f) Reference to this test method.

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APPENDIX E

LINING DEFECTS AND REPAIR

(Normative)

E1 DEFECTS CLASSIFICATION

Defects in lining blankets are described as major and minor where minor defects are:

(a) Discontinuities detected by spark testing not exceeding an average of one per m2 of plastic lining area tested.

(b) Damage such as cuts and tears over an area not greater than 0.04 m2.

(c) Short incomplete welds, i.e. incomplete or unfused welds individually not more than 25 mm in length or not more than 250 mm in any one metre length.

(d) Charred sections of lining less than 0.05 m2 in lining area.

(e) Lining projections and depressions between one quarter and one half the concrete cover.

(f) Unembedded keys over an area not exceeding 0.04 m2 of a plastics lining area.

(g) An unembedded key with keys either side embedded.

(h) Welded joints that have failed pull tests.

E2 DEFECTS TO BE REPAIRED

Minor defects a), b), c), d), e) and h) shall be repaired in accordance with this Appendix and the manufacturers printed procedures.

Minor defects f) and g) do not require repair.

Repair of major defects shall only be undertaken, where agreed by the purchaser or purchasers representative. Repair of major defects shall be in accordance with this Appendix and the manufacturers printed procedures.

E3 WELDING STRIPS FOR REPAIR

Where welding strips are used in repair, test tabs shall be left at the ends of the welding strip in order to perform a pull test.

E4 REPAIR METHODS

E4.1 Pinholes, Cuts and Tears

Isolated pinholes, and straight cuts and tears whose cut or torn edges can be brought together shall be repaired by welding flat welding strip centrally over the defect.

E4.2 Damaged Sections

Damaged sections, which cannot be repaired using a welding strip, shall be replaced.

Replacement shall be as follows:

(a) Cut out the defective area preferably in a rectangular shape.

(b) Cut a lining patch to the shape removed.

(c) Tack weld the patch in place with no gap greater than 4 mm.

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(d) Weld a flat welding strips centrally over all joins.

Otherwise replacement shall be as follows:

(e) Cut out the defective area preferably in a rectangular shape.

(f) Cut a lining patch at least 12 mm larger all round than the shape removed.

(g) Seal with offset welding strips.

E4.3 Short Incomplete Welds

Short incomplete welds shall be repaired as follows:

(a) Lift up the unsealed edge with a blunt knife.

(b) Carefully direct heat into the weld.

(c) Press the strip down firmly.

E4.4 Long Incomplete Welds

Long incomplete welds shall be cut out and patched as described in Paragraph E2 where approved by the purchaser or the purchasers representative that the lining or lined pipe is not to be rejected.

E4.5 Charred and Overheated Welds

Charred and overheated welds resulting from a repair operation shall be cut out and patched as described in Paragraph E2.

E4.6 Unembedded Keys and Lining Depressions and Projections

Unembedded keys and lining depressions and projections shall be repaired as follows:

(a) Cut the lining no more than necessary to effect concrete repair or key re-embedment.

(b) Dig out all loose concrete and remove projections.

(c) Replace removed concrete with an approved epoxy.

(d) Reposition the cut lining and re-embed the lining keys while expelling any entrapped air.

(e) Hold the lining in place with steel strips strutted diagonally for at least 24 h.

(f) Weld flat welding strips centrally over all cuts.

E5 WELDING STRIP PULL TEST

All welding strips shall be tested for resistance to being pulled off as follows:

(a) Punch a hole in test tabs provided at each end of the welding strip (welding strips to be extended 50 mm beyond welding length each end to provide test tabs).

(b) Apply a force of 50 N, by means of a spring balance to each tab at a time perpendicular to the face of the lining. Hold the adjoining lining against the concrete during application of the force.

(c) If weld failure occurs on application of force, maintain the 50 N pulling force until weld separation ceases.

(d) Repair failed welds in accordance with clause E3.

(e) Repeat pull test and repair until pull test does not open the weld.

(f) Trim tabs neatly after satisfactory testing.

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APPENDIX F

HANDLING, STORAGE AND TRANSPORT

(Informative)

Handling, storage and transport of plastics lined reinforced concrete pipes shall be in accordance with the product manufacturer's printed requirements.

Notwithstanding the manufacturers requirements, the following requirements shall be met:

(a) Use only lifting and transportation equipment which does not contact plastics lining or plastics accessories except when approval has been received from the purchasers representative allowing use of equipment having padding or protective systems to prevent damage.

(b) Protect plastic lining accessories, such as welding strip during handling, storage and transport until secured in the completed installation.

(c) Secure lining flaps protruding from pipe ends to prevent severe changes in the direction of the flap.

(d) Prevent exposure to sunlight of plastics lining sheets and accessories

(e) Provide secure, clean and dry storage areas for plastics lining work materials and tools.

Documents

WSA 113 RC Pipe With Flexible TPL Issue 1