NES 167 Requirements for Resin Polyester for Ship Structures Category 3

7/21/2019 NES 167 Requirements for Resin Polyester for Ship Structures Category 3

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Ministry of Defence

Defence Standard 02-167 (NES 167)

Issue 1 Publication Date 01 April 2000

Incorporating NES 167 Category 3

Issue 1 Publication Date December 1983

Requirements For Resin Polyester

For Ships Structures


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AMENDMENT RECORD

Amd No Date Text Affected Signature and Date

REVISION NOTE

This standard is raised to Issue 1 to update its content.

HISTORICAL RECORD

This standard supersedes the following:

Naval Engineering Standard (NES) 167 Issue 1 dated December 1983.


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Ministry of Defence

Naval Engineering Standard

NES 167 Issue 1 (Reformatted) December 1983

REQUIREMENTS FORRESIN POLYESTER FOR SHIP STRUCTURES


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This NES Supersedes

DG SHIPS 1180

Record of Amendments

AMDT INSERTED BY DATE

1 INCORPORATED

2

3

4

5

6

7

8

9

10


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i

NAVAL ENGINEERING STANDARD 167

ISSUE 1 (REFORMATTED)

REQUIREMENTS FOR RESIN POLYESTER

FOR SHIP STRUCTURES

The issue and use of this Standard

is authorized for use in MOD contracts

by MOD(PE) Sea Systems and

the Naval Support Command

ECROWN COPYRIGHT

Published by:

Director of Naval Architecture

Procurement Executive, Ministry of Defence

Foxhill, Bath BA1 5AB


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NES 167Issue 1 (Reformatted)

iii

SCOPE

1. This NES details the requirements for thixotropic unsaturated isophthalic polyester resins foruse with fibre reinforcement for the production of GRP laminates for ship structures. Thematerials currently approved are specified in Annex H.

2. The two resins designated standard (S) and low viscosity (LV) provide similar laminateproperties when used under comparable conditions. The low viscosity resins are for theproduction of large flat or nearly flat panels. The grade of resin to be supplied will be statedin the contract or order.

3. Details of the catalyst and accelerator to be used in association with the resin are specified inAnnex C.


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v

FOREWORD

Sponsorship

1. This Naval Engineering Standard (NES) is sponsored by the Procurement Executive, Ministryof Defence, Deputy Controller Warships, Section NA 131.

2. It is to be applied as required by any Procurement Executive, Ministry of Defence contract forresin polyester requirements for ship structures and is applicable to surface ships andsubmarines.

3. If it is found to be technically unsuitable for any particular requirement the sponsor is to beinformed in writing of the circumstances with a copy to Deputy Controller WarshipEquipment DCWE, Section ME 241.

4. Any user of this NES either within MOD or in outside industry may propose an amendmentto an NES. Proposals for amendments which are:

1. not directly applicable to a particular contract are to be made to the sponsor of the NES

2. directly applicable to a particular contract are to be dealt with using existingdepartmental procedures or as specified in the contract.

5. No alteration is to be made to this NES except by the issue of a formal amendment.

6. Unless otherwise stated, reference in this NES to approval, approved, authorized and similarterms means by the Procurement Executive, Ministry of Defence.

7. Any significant amendments that may be made to this NES at a later date will be indicatedby a vertical sideline. Deletions will be indicated by 000 appearing at the end of the lineinterval.

Conditions of Release

General

8. This Naval Engineering Standard (NES) has been prepared for the use of the Crown and ofits contractors in the execution of contracts for the Crown. The Crown hereby excludes allliability (other than liability for death or personal injury) whatsoever and howsoever arising(including but without limitation, negligence on the part of the Crown, its servants or agents)for any loss or damage however caused where the NES is used for any other purpose.

9. This document is Crown Copyright and the information herein may be subject to Crown orthird party rights. It is not to be released, reproduced or published without written permissionof the MOD.

10. The Crown reserves the right to amend or modify the contents of this NES without consultingor informing any holder.

MOD Tender or Contract Process

11. This NES is the property of the Crown and unless otherwise authorized in writing by the MODmust be returned on completion of the contract, or submission of the tender, in connectionwith which it is issued.


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vii

CONTENTS

Page No

TITLE PAGE i. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SCOPE iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .FOREWORD v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sponsorship v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Conditions of Release v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MOD Tender or Contract Process v. . . . . . . . . . . . . . . . . . . . . . . . . .

Related Documents vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Health and Safety vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warning vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CONTENTS vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 1. TYPE APPROVAL 1.1. . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2. KEEPING QUALITIES 2.1. . . . . . . . . . . . . . . . . . . . . . .

SECTION 3. REQUIREMENTS FOR BATCH PRODUCTIONSAMPLING 3.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4. QUALITY ASSURANCE DOCUMENTATION 4.1. . .

SECTION 5. INSTRUCTIONS FOR USE 5.1. . . . . . . . . . . . . . . . . . .

SECTION 6. IDENTIFICATION 6.1. . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 7. REQUIREMENTS FOR USER SURVEILLANCE 7.1

ANNEX A. RELATED DOCUMENTS A.1. . . . . . . . . . . . . . . . . . . .

ANNEX B. DEFINITIONS AND ABBREVIATIONS B.1. . . . . . . .

ANNEX C. CATALYST AND ACCELERATORREQUIREMENTS C.1. . . . . . . . . . . . . . . . . . . . . . . . . . .

ANNEX D. TEST SPECIMEN PREPARATION ANDCONDITIONING D.1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

ANNEX E. METHODS OF TEST AND SPECIMENREQUIREMENTS E.1. . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE E.1. RESIN PROPERTIES TESTMETHODS E.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE E.2 LAMINATE PROPERTIES TESTMETHODS E.3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FIGURE E.1 COMPRESSION TEST SPECIMEN E.5

FIGURE E.2 COMPRESSION TESTTEST

SPECIMEN END CLAMPS2 OFF E.6. . . . . . . . . . . .FIGURE E.3 INTERLAMINAR SHEAR TESTSPECIMEN E.7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


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ANNEX F. RESIN PROPERTIES FOR TYPE APPROVAL F.1. .

TABLE F.1 RESIN PROPERTIES F.1. . . . . . . . . . . . .

TABLE F.2 LAMINATE PROPERTIES F.2. . . . . . . . .

ANNEX G. ALLOWABLE PRODUCTION TOLERANCE G.1. . .

TABLE G.1 ALLOWABLE PRODUCTIONTOLERANCE G.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ANNEX H. MATERIALS CURRENTLY APPROVED BYMOD(PE) FOR GLASS REINFORCED PLASTICSHIP STRUCTURES H.1. . . . . . . . . . . . . . . . . . . . . . . . .

ALPHABETICAL INDEX


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1.1

1. TYPE APPROVAL

a. Before any resins are supplied as complying with the requirements of this NES,the manufacturer is to obtain type approval. Type approval is to be obtained foreach resin proposed.

b. Applications for type approval are to be submitted to the Director of MaterialsQuality Assurance, HQ Building, Royal Arsenal East, Woolwich, LondonSE18 6TD, together with:

(1) evidence, in the form of test results, that the resins comply with all therequirements specified herein.

(2) a sample of the resin for which approval is sought, together with:

(a) details of composition; this information will be treated inconfidence.

(b) two copies of full instructions for use.

(c) the manufacturers reference number (if any).

(3) a second sample of the resin for use in ensuring conformity with Section 2.

(4) test laminates prepared in accordance with Annex D. Such laminates areto have a total area of at least 0.4m2 and one dimension of each piece mustbe at least 300mm. Untrimmed laminates to this latter dimension areacceptable.

(5) a list of nominal values for the properties referred to in Annex F. whendetermined by the methods described in Annex C. The nominal values

proposed are to be to the satisfaction of DMQA. The tolerances permittedon the nominal values are shown in Annex G.

c. A copy of the type approval application, excluding sample material, is to beforwarded to the Procurement Executive, Ministry of Defence, DCW SectionNA 131, Foxhill, Bath BA1 5AB.

d. In selecting materials or substances to meet this NES, the manufacturer is totake into account their relative toxicity; preference will be given by the Ministryto those materials which, while meeting the technical requirements of the NES,give rise to the least hazard in their storage, handling, application, removal anddisposal.

e. The composition is not to be changed from that declared without prior writtenpermission from DMQA. Any such newly formulated resin may be subjected tonew Type Approval tests.


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1.2


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2.1

2. KEEPING QUALITIES

a. When stored in the original unopened containers at a temperature of 20 C to22 C, the material is to comply with the requirements of Annex G. for a periodof at least 6 months from the date of despatch.


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2.2


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3.1

3. REQUIREMENTS FOR BATCH PRODUCTION SAMPLING

a. Each batch is to be sampled to prove compliance with Annex G., and certifiedto this effect by the manufacturer. Copies of the certification are to be suppliedwith materials delivered.

b. If any sample is found not to comply with all the requirements of this NES afurther sample may be tested. Should this second sample fail to meet any of therequirements of this NES, the whole consignment is to be rejected.


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3.2


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4.1

4. QUALITY ASSURANCE DOCUMENTATION

a. The manufacturer is to forward with his tender or acknowledgement of order,certification that the resin to be supplied conforms with that for which typeapproval was granted.


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4.2


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5.1

5. INSTRUCTIONS FOR USE

a. The manufacturer is to provide information on the following:

(1) Precautionsdetails of the safety precautions to be taken duringstoring, handling and mixing.

(2) Stor age Conditi onsdetails of recommended storage conditions.


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5.2


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6.1

6. IDENTIFICATION

a. Except in the case of delivery by tanker, each container is to be clearly markedwith the following:

(1) Manufacturers Identification and Batch Number.

(2) Batch production date.

(3) Limiting date, in accordance with Clause 2.a.

(4) Recommended storage conditions.

(5) NES 167 Type S, or LV as appropriate.


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6.2


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7.1

7. REQUIREMENTS FOR USER SURVEILLANCE

a. The resin manufacturers certification required by Clause 4.a. is to be checkedby the user in respect of:

(1) gel time of each batch of resin.

(2) viscosity.

b. The frequency of checking is to be at the discretion of the user.

c. Tests in accordance with Clause 7. are also to be undertaken from randomlyselected samples of as supplied and as stored resin at the discretion of the useror DMQA.

d. All resins exceeding a 13 week life, as indicated by the batch production date,must be tested to the requirements of Annex G. prior to use.

e. If any material is found not to comply with all the requirements of this NES

samples are to be referred to the manufacturer and DMQA for comparative testsin accordance with Annex E. The material is not to be used until materialchange or re-certification has been obtained.


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7.2


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A.1 ANNEX A.

ANNEX A.

RELATED DOCUMENTS

A.1 Reference is made to:

Referred toin Clause

BS 970 Wrought Steels in the Form of Blooms, Billets,Bars and Forgings

FIGURE E.2

BS 2782 Methods of Testing Plastics E.1, 5FIGURE E.3

BS 3532 Unsaturated Polyester Resin Systems for LowPressure Fibre Reinforced Plastics

E.1

NES 166 Requirements for Glass Woven Roving Fabricsfor Ship Structures

D.1.1,Annex H.

ASTM D2583!67 Indentation Hardness of Plastics by means of aBarcol Impressor

E.1.2


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A.2ANNEX A.


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B.1 ANNEX B.

ANNEX B.

DEFINITIONS AND ABBREVIATIONS

B.1 There are no Definitions and Abbreviations for this NES.


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B.2ANNEX B.


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C.1 ANNEX C.

ANNEX C.

CATALYST AND ACCELERATOR REQUIREMENTS

C.1 Catalyst

a. The catalyst to be used in association with the resin of this NES is to be asfollows:

Clarity Clear

Colour Almost colourless (see NOTE)

Concentration 50% solution of ketone peroxides in phthalateplasticizer

Available Oxygen 9.4 to 9.8%

Shelf life 3 months minimum from date of despatch at a

maximum storage temperature of 20 C.

Note: If the user requires the catalyst to be coloured for production reasons, thepigments are not, in any way, to affect any of the above properties.

b. The manufacturer is to certify that each batch of catalyst complies with theappropriate Approved Firms Schedule, obtainable from MQAD.

c. Each container is to be clearly marked with the following particulars:



(3) Limiting date in accordance with C.1a.


(5) Approved Firms Schedule number.

C.1.1 Accelerator

a. The accelerator to be used in association with the resin of thisNES isto bebasedupon soluble cobalt salts in organic acids (such as cobalt octoate) with styreneas the diluent. The cobalt content is to be a nominal 0.5%. The shelf life is to bea minimum of 3 months from the date of despatch at a maximum storage

temperature of 20 C.

b. The manufacturer is to certify that each batch of accelerator complies with theappropriate Approved Firms Schedule, obtainable from MQAD.

c. Each container is to be clearly marked with the following particulars:



(3) Limiting date in accordance with C.1.1a.


(5) Approved Firms Schedule number.


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C.2ANNEX C.


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D.1 ANNEX D.

ANNEX D.

TEST SPECIMEN PREPARATION AND CONDITIONING

D.1 Mixed Resin System

a. For determination of gel time, cast resin and laminate properties, the followingcuring agents are to be employed:

Catalyst: Interox SD2, Butanox LA or equivalent1.5%.

Accelerator:AKZO NL48ST (or equivalent)1.5 to 2% as stipulated from thetype approval data.

For batch production testing proportionate increase in the accelerator contentmay be used providing the relevant correlation data is presented with the typeapproval information and stated in production certification documents.

D.1.1 Laminate Reinforcement

a. Laminates are to be reinforced with eight plies laid weft on warp alternately of830g/m2 woven rovings of material approved to NES 166 by MOD for shipstructures. Currently approved materials are listed in Annex H.

D.1.2 Laminate Conditioning

a. Conditioning of laminate prior to machining or testing of specimens is not toexceed 60 days at a temperature not exceeding 25 C.

Laminates may be cured by leaving at a controlled room temperature notexceeding 25 C for a period of between 24 and 72 hours, followed by post curing

at a temperature of 40 C 2 C for a period of 72 hours.

D.1.3 Laminate SpecimensMachining

a. During all machining operations care is to be taken not to damage the laminateby overheating or delamination (cut edges are particularly susceptible) and duenote is to be taken of alignment of specimen with reinforcements direction.


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D.2ANNEX D.


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E.1 ANNEX E.

ANNEX E.

METHODS OF TEST AND SPECIMEN REQUIREMENTS

E.1 Test for Resin Properties

a. The test method of resin properties are as shown in TABLE E.1.

PROPERTY TEST METHOD

Specific Gravity BS 3532 Appendix F

Acid Value BS 3532 Appendix H

Volatile Content BS 3532 Appendix J

Gel Time @ 25 C BS 3532 Appendix K

Burning behaviour of small specimen BS 3532 Appendix B

Water Absorption BS 2782 Method 502F

Temperature of Deflection under

Load of Cast Resin

BS 2782 Method 102G

TABLE E.1. RESIN PROPERTIES TEST METHODS

E.1.1 Viscosity Measurement

a. E quipment requir ed for viscosit y measurement are:

(1) For Type Approval the viscosities at true shear rates are to bemeasured using apparatus such as the Weissenburg Rheogoniometer,Shirley!Ferranti, or equivalent instrument.

(2) For P roduction Batch Sampling and User Surveillancetheviscosities at mean shear rates are to be measured with the Brookfieldmodel RVT viscometer equipped with the No 3 spindle or equivalentequipment of proven correlation.

(3) The appropriate equipment makers instructions for determining viscosityare to be followed.

b. Specimen Condit ioni ng for Batch Sampling and User Surveillance is to beas follows:

(1) The contents of any container selected for sampling are to be thoroughly

mixed before the sample is taken.

(2) The resin specimen is to be brought to a temperature of 25 C 0.2 Cbefore viscosity measurement is taken and the temperature maintainedduring the test.

(3) The resin specimen is to be established prior to testing by allowing it tostand for 30 minutes at the test temperature after stirring to obtainuniform temperature distribution.


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E.2ANNEX E.

c. P rocedure for Measuring Mean Shear R ate Viscosity: with theBrookfield Viscometer Model RVT is to be as follows:

(1) P reparation of Sampletwo thirds fill a 600ml beaker with the testmaterial, taking care not to introduce air bubbles. Bring the temperatureof the sample to 25 C 0.2 C by stirring the sample using the

thermometer to ensure an even temperature distribution. Avoid creatingair bubbles by over vigorous stirring. Cover the beaker with a glass plateor watchglass. Allow the sample to stand undisturbed in the constanttemperature room or constant temperature water bath for at least 30minutes.

Note: The sample as received may contain small finely dispersed air bubbleswhich remain throughout the test procedure. They do not affect theresults, but it is advantageous not to increase aeration during pouring andstirring.

d. Measurement

(1) Set the viscometer for mean shear rate at 5rpm. Immerse the spindle andguard of the viscometer in the sample to the depth indicated by the groovecut in the spindle. Check that the viscometer is absolutely vertical. Startthe motor, release the clutch lever and allow rotation to continue for 30seconds. Press down the clutch lever with the thumb to hold the readingand switch off when the red pointer comes into view. Take the reading onthe scale and take two further check readings, starting the motor beforereleasing the clutch, thereby reducing oscillation and permitting quickerreadings.

Note: Always release the clutch while the spindle is still immersed so that the

pointer will float rather than snap back to zero.

(2) Set the viscometer for mean shear rate at 50rpm and repeat the proceduredetailed in (1) above.

e. Calculati on and E xpression of R esultscalculate the Brookfield viscosityin centipoises by multiplying the scale reading by the factor appropriate to thespindle and speed used.

Factors appropriate to No 3 spindle are:

At speed 5rpm: 200At speed 50rpm: 20

Record the viscosity in poises (P) and quote the spindle and speed used.


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E.3 ANNEX E.

E.1.2 Tests for Laminate Properties

a. The test methods for laminate properties are as shown in TABLE E.2.

SPECIMEN

PROPERTY TEST METHODSHAPE

SIZE

mm

No OFF

PER TESTTensile Strength BS 2782 Method 320E Rect 230 25 5

Cross BreakingStrength

BS 2782 Method 304D R ect 192 25 5

Inter LaminarShear Strength

As Fig 3 Rect 90 25 5

CompressiveStrength andModulus

As Para 6 Dumbell 108 25 5

Resin Content BS 2782 Method 107K

at least onemeasurement for eachtype of Physical Test

Degree of Cure ASTM D2583!67Barcol ImpressorModel GYZJ!934!1

TABLE E.2 LAMINATE PROPERTIES TEST METHODS

b. Compressive Strength and M odulus Test procedures are to be as follows:

(1) Specimen shape to be in accordance with FIGURE E.1.

(2) Test to be carried out with specimen clamped in special end fixtures asdetailed in FIGURE E.2.

(3) For modulus measurement attach compressometer to machined edges ofspecimen. Recordings to be taken up to approximately 25% ultimatestress. Compressometer to be removed at approximately 30% ultimatestress.

(4) Compressive tests to be carried out at a loading rate such that failureoccurs in 30 to 90 seconds (1.25mm/min approx).

c. Delayed L ay-up Test procedures are to be as follows:

L aminating P rocedure:

(1) Laminate one panel approx 600mm 600mm 4 plies thickalternatively weft on warp.

(2) After approx 48 hours at 24 C + 2 C cut the laminate into 4 panels eachapprox 300mm 300mm.

(3) Laminate an additional 4 plies on each panel at the following intervalsafter completion of initial lay-up.

2 to 3 days: 6 to 8 days: 12 to 14 days: 24 to 28 days.

Note: The surface of the initial 4 ply laminate is not to be prepared prior to thecompletion of the 8 ply laminate.

(4) Laminates may be post cured in accordance with Annex D., but the initial4 ply laminate is not to be post cured.


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E.4ANNEX E.

Specimens and Tests

(5) From each panel the following is to be prepared and tested:

Five Cross Breaking Strength SpecimensFive Inter Laminar Shear Specimens

d. Str ength R etention after I mmer sion in Water procedures to be as follows:

(1) Five Cross Breaking Strength Specimens and five CompressionSpecimens are tobe immersed in fresh water ata temperature of 23 2Cand pressure of 7 0.35MPa for a period of 100 days.

(2) Specimens may be removed from the pressure vessel up to 6 hours beforetesting and immersed at atmospheric pressure.

(3) Immediately prior to testing the specimens may be dried on absorbentpaper to remove surface water.

Note: Where suitable apparatus for this test is not available, and aftersatisfactory completion of all the other tests required in Annex F. andauthorization has been obtained from DMQA, prepared specimens may beforwarded to:

Chief SuperintendentAdmiralty Marine Technology EstablishmentPooleDorset

E.1.3 Test Specimen Requirements

a. Laminate test specimen requirements of this NES are as follows:Tensile strength specimens 5 No

Cross breaking strength specimens 5 No (ambient condition)

5 No (temperature)

5 No (wet str retention)

20 No (delayed lay-up)

35 No

Com ressive stren th s ecimens 5 No ambient condition10 No

5 No (wet str retention)

Interlaminar shear specimens 20 No (delayed lay-up)

Resin content specimens 14 No


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E.5 ANNEX E.

FIGURE E.1 COMPRESSION TEST SPECIMEN

2


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E.6ANNEX E.

FIGURE E.2 COMPRESSION TESTTEST SPECIMEN END CLAMPS2 OFF


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E.7 ANNEX E.

FIGURE E.3 INTERLAMINAR SHEAR TEST SPECIMEN


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E.8ANNEX E.


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F.1 ANNEX F.

ANNEX F.

RESIN PROPERTIES FOR TYPE APPROVAL

PROPERTYMAX

OR

MIN

UNITS VALUE

Specific gravity ! ! 1.10 to 1.15

Acid value Max mg KOH/gm 20.0

Volatile content Max % 46.0

Gel time at 25 C ! minutes 120 to 150

Temperature ofdeflection under loadof cast resin

Min C 60

Water absorption (24hours)

Max mg 30

Water absorption(100 days)

Max 150

Flammability ! ! To be reported

Resin Viscosity at Grade S Grade LV25C

True shear rate:

(see E.1.1a.)

at 100/sec Max Poise 9.0 !

at 0.2/sec Min Poise 55.0 !

Mean shear rate:

(See E.1.1c.)

at 50rpm Range Poise 11 to 16 6 to 12

at 5rpm Min Poise 30 !

Max Poise ! 15

TABLE F.1 RESIN PROPERTIES

Notes:

1. Mean shear rate figures relate to a Brookfield Model RVT viscometerspindle Size 3.

2. Gel time values are to be determined with catalyst and acceleratorproportions as detailed in Annex D.


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F.2ANNEX F.

PROPERTY MAX OR UNITS VALUEMIN S GRADE & LV GRADE

RESINS

Cross breaking strength oflaminate

min MPa 275

Cross breaking strength oflaminate at nominaldeflection temperatureafter 168 hours at thistemperature

min MPa 138

Cross breaking strength oflaminate after 100 daysimmersion in water at7 MPa

min MPa 80% of initial crossbreaking strength

Compression strength min MPa 170

Compression modulus min MPa 15900

Compression strengthafter 100 days immersionin water at 7 MPa

min MPa 148

Compression modulusafter 100 days immersionin water at 7 MPa

min MPa 13800

Tensile strength min MPa 228

Delayed lay-upcrossbreaking strength

! MPa To be reported

Delayed lay-upinter

laminar shear strength

! MPa To be reported

Resin contentindividualspecimens

range % weight 46 to 54

Resin contentaverage of14 specimens (E.1.3)

range % weight 48 to 52

Degree of resin cure BarcolHardness

Minimum at 48 hrs and72 hrs to be quoted

TABLE F.2 LAMINATE PROPERTIES

Note: The properties of laminates produced using LV grade resin are to be as for

S grade resin.

SEE ANNEXES D. AND E. FOR DETAILS OF SPECIMENPREPARATION AND METHODS OF TEST.


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G.1 ANNEX G.

ANNEX G.

ALLOWABLE PRODUCTION TOLERANCE

PROPERTY TOLERANCE RANGE

Specific Gravity 0.01 on type approval value

Acid Value 4mg KOH/gm on type approval value

Volatile Content 3%: on type approval value

Gel Time at 25 C { 100 to 180 mins

VISCOSITIES AT 25 C {

S GRADE

Mean Shear Rate at 50rpm Range 11 to 16 poise

Mean Shear Rate at 5rpm 30 poise minimum

L GRADE

Mean Shear Rate at 50rpm Range 6 to 12 poise

Mean Shear Rate at 5rpm 15 poise maximum

TABLE G.1 ALLOWABLE PRODUCTION TOLERANCE

Notes:

1. Type approval values are to be provided by the Manufacturer.

2. It is essential that the contents of any container selected for sampling areto be thoroughly mixed before the sample is taken.

3. Mean Shear Rate figures relate to a Brookfield Model RVT Viscometer,

spindle Size 3.

4. User surveillance tests{.

5. See Annex E. for Methods of Test.


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G.2ANNEX G.


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H.1 ANNEX H.

ANNEX H.

MATERIALS CURRENTLY APPROVED BY MOD(PE) FOR GLASS REINFORCED

PLASTIC SHIP STRUCTURES

a. P olyester R esin s (Isophthalic)Approved to this NES.

BP Chemicals Cellobond A2785CVScott Bader Crystic 625TV BIP Beetle L3738

b. Glass R ein for cements (Woven Rovings)Approved to NES 166.

S Gr ade M anufactur ed fr om one of the fol lowi ngrovings:

Marglass 266 Owen Corning OCF810, BT38 12 or 475 8;Fothergill & Harvey Y920 Silenka Series 55 Type 051;Fibreglass RP780 Fibreglass FGRE22;TBA ECK25 TBA ECR368 or ECR1472

F Grade

Fothergill & Harvey Y920 manufactured from Fibreglass FGR 22 rovings.


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H.2ANNEX H.


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INDEXINDEX.1

ALPHABETICAL INDEX

A

Accelerator, iii

C

Catalyst, iii

Certificate, 4.1

Composition, 1.1

D

D ocumentation, 4.1

G

G el time, 7.1

L

La minate tests, 1.1

MMarking, 6.1

Mat erials, iii

P

Precautions, 5.1

Properties, 1.1

QQuality Assurance, 1.1

R

R esin Tests, 1.1

Resins, iii, 1.1

S

Samples, 1.1, 3.1

Storing, 2.1, 5.1


50/52


INDEX INDEX.2

T

Tempera ture, storing, 2.1

Test s, 1.1

Toxicit y, 1.1

V

Viscosity, 1.1, 7.1


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