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GA
S &
WA
TE
R E
QU
IPM
EN
T
Teeset • Bagging-off • PE Purge • Purge/Bypass • Mini-Drill • Aquastop
Co
nte
nts
General & product Information 4
Section 1: Teeset Equipment For Gas 5-7
Section 2: Bagging-Off & Ancillary Equipment 8-11
Section 3: Bypass Equipment 12-13
Section 4: 32mm PE Purge Tool 14-16
Section 5: Mini-Drill 17-18
Section 6: AquaStop 19-22
3
IntroductionWASK is a leading supplier of specialist fi ttings and pipeline equipment to the Gas and Water Industries. With it’s head offi ce in CRANE, WASK has been service the Utilities market for nearly 120 years. The Company’s products are used in many countries throughout the world.
WASK has earned a reputation for supplying technically innovative and high quality products, and has an on-going commitment to Product Development. The Company is continually upgrading its product portfolio and offering new designs to meet the varying and challenging needs of the market. Development collaboration with leading International Utilities has led to jointly patented designs for some particularly demanding applications.
This catalogue contains product application and other information on Drilling, Tapping, Ferrule Insertion, Bagging-off and Ancillary Equipment for use on gas and water mains.
DescriptionThe constant search for safer working practices, together with the increased used of Polyethylene (PE) in gas distribution systems and the increase in distribution pressures, has provided a demand for high performance pipe maintenance equipment. Among the equipment offered in this catalogue are the well established WASK Teeset, Aquastop, Bagging-off systems up to 2 bar and Purge Tools.
Quality AssuranceWASK operates a Quality Assurance system which is certifi ed to comply with BS EN ISO 9002:1994. On site engineering and test facilities enable the Company to monitor Quality at all stages of production while the use of the latest Pro-Eng and CNC systems in the manufacture of the Company’s products ensures consistently high standards of product quality.
Additional InformationFor further details of these products or any products in the WASK range, please contact the Sales Offi ce.
TrainingWASK recommends that operators are fully trained in the use of this equipment.
Spares & ServicesWASK stocks a full range of spare parts. WASK strongly recommends that only genuine WASK spares are used on WASK equipment. WASK has a network or authorised service agents who are able to offer a refurbishment service.
For further details contact WASK Sales Offi ce.
Health and SafetyWASK complies fully with the COSSH Regulations 1988 for the supply of products to its customers. The materials used in the construction of these products are safe when handled and used for the purpose for which they were designed. The products must not be modifi ed, heated (except during the course of welding where specifi cally designed for that purpose) nor exposed to corrosive or other aggressive chemicals or agents.
THESE PRODUCTS ARE TO BE USED STRICTLY IN ACCORDANCE WITH WASK INSTRUCTIONS AND YOUR EMPLOYER’S WORKING PRACTICES.
Note
Descriptions and illustrations in this publication are for general guidance only. No responsibility can be accepted for any errors, omissions or incorrect assumptions. Refer to the product itself if more detailed information is required. Owing to the continuing programme of product improvement, the Company reserves the right to amend any published information or to modify any product without notice.
Other ProductsAlso available from WASK is a wide range or fi ttings for gas distribution. These include the Pecat range of mains fi ttings for MDPE and HDPE pipe, CRIMP and Flexigrip Service Fittings and the Transgrip range of Flange Adaptors.
Pecat is a registered trademark of CRANE Ltd. WASK, Teeset, Flexigrip and Transgrip are registered trademarks of CRANE Ltd.
Gerneral & Product Information
4
5
Teeset Equipment For GasSection 1:
6
DescriptionThe Teeset machine allows for the drilling and tapping of gas main pipes in the same manner as a central action drill stand but, by the addition of a simple sliding gate valve in the base of the machine, allows up to 1” equal top entry service tees and 2” nipples for two part service tees to British Gas Specifi cation PS/F2 to be fi tted safely to live mains without loss of gas. The machine will also fi t plugs, bushes, side entry tees, standpipes, bag pipes, main spraying heads etc, under no gas conditions.
The Teeset machine is approved by British Gas meeting all the requirements of British Gas Specifi cation PS/E1. Overall working dimensions are only 425mm (16 ¾”) high x 280mm (11”) long x 280mm (11”) wide, with handling weights of body at 4.5kg (10lbs); drilling head and tap at 7 kg (15lbs) and fi tting head at 4.5 kg (10 lbs). The complete shipping weight in box is only 30 kg (66 lbs).
A Fitting Head, Spindle and a range of Carriers enable fi ttings such as Service Tees and EMID plugs to be inserted into a previously drilled and tapped main.
Some of the safety features of this machine are:■ The machine is light and well balanced
to facilitate easy location on the main.
■ Positive spindle locking device.
■ Design of bridle makes it impossible to drill through the valve plate in the shut position with a parallel thread tap.
■ Combined head lock and purge valve minimises the risk of accidental head removal with valve open to pressure, or head removal with pressure inside.
■ Large easily replaceable ‘O’ ring seals, ensure gas tightness of machine.
■ Sturdy alloy steel drill spindle running in bronze bearing, ensures maximum rigidity and long life with minimum maintenance.
■ PTFE Coated stainless steel valve plate working between wiper type sealing rings ensure trouble-free valve operation.
■ The machine is suitable for use at pressures up to 2 bar (30 psi), and will fi t mains from 80 to 300 mm (3” to 12”) as supplied. With a longer securing chain and a pair of extension lugs (available as additional equipment) the machine can be fi tted to any large size main. TAPS ARE NOT SUPPLIED WITH THE MACHINE, but are available as additional equipment. A variety of additional equipment is available at extra cost for inserting side entry tees, plugs, standpipes, bagging-off equipment, pipe saddle (clip) drilling, fastening to large mains, air motor drive etc.
Teeset drilling, tapping & fi tting installation
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8
Bagging Off Equipment & Ancillary EquipmentSection 2:
IntroductionThe Bagging-off Equipment utilises the base of the Teeset Drilling Machine to provide a safe and comprehensive method of fl ow-stopping polyethylene (125mm to 400mm), ferrous 3” to 12” cast iron, 80mm to 400mm ductile iron and PVC (125mm to 400mm) live gas mains under gas free working conditions.
The Bagpipe equipment comprises a Canopy enclosing the Bagtube which is mounted on the Teeset base, enabling a Stopper Bag to be inserted through a tapping into the main and infl ated to stop the fl ow of gas. Sets of interchangeable Noses and Shoes permit the Stopper Bag to be correctly positioned relative to the centre line of the main. Positive support of the infl ated Stopper Bag against the gas pressure is provided by the Nose and Shoe assembly.
In the event of the Stopper Bag failure, replacement is simple, quick and safe.
Specifi cations
British Gas PS / E1
Design & Performance
By utilising the base of the Teeset Drilling Machine, this latest generation equipment enables a temporary fl ow of gas to be provided around a section of polyethylene or ferrous main which is undergoing maintenance or repair.
Supplied in kit form, the equipment provides the means to connect a fullbore 3” bypass around a mains maintenance operation subject to the maximum size of drilled and tapped hole allowed by regulations. The pressure limitation is 350 mbar with rigid bypass, rated with that of the Drilling Machine. Flexible “Riders” are available for low pressure applications.
Incorporated within the Bypass Head is a 1” vent and purge valve and a 3/8” valved pressure test probe which can be inserted through the main tapping into the full gas fl ow.
Gas Bagging-off & Ancillary Equipment
9
Operational DataBefore commencing a fl ow-stopping operation, it is recommended that reference is made to industry Codes of Practice for bagging-off gas mains to ascertain limiting pressures, allowable tappings, dimensions etc, which may override any information given below.
Gas Bagging-off & Ancillary Equipment
Normal size of main
PE (mm) 63 125 180 250 315 355 400
Ferrous(in) 2 3/4
5/67/8
9/10 12 16
(mm) 50 80/100 150 200 250 300 400
Maximum allowable main pressure
PE(psi) 4 4 4 3 1.5 1.5 1.5
(mbar) 300 300 300 200 100 100 100
Ferrous(psi) 5 5 4 4 3 1.5 1.5
(mbar) 350 350 300 300 200 100 100
Minimum distance from secondary tapping to primary tapping to bypass tapping
PE(in) 18 18 20 22 24 24 26
(mm) 450 450 500 550 600 600 650
Ferrous(in) 16 16 18 20 22 24 26
(mm) 400 400 450 500 550 600 600
Cut hole diameter
PE (MM) 56 56 56 56 56 56 56
Tapping size BSP parallel thread to BS 21
Ferrous (in) 1 1 1 1/2 1 1/2 (7), 2(8) 2 2 2
Bag infl ation pressure
PE(psi) 15 8 8 5 4 4 3
(mbar) 1000 550 550 350 300 300 200
Ferrous(psi) 15 10 8 8 5 4 3
(mbar) 1000 700 550 550 350 300 200
10
11
Ancillary EquipmentInspection Head
Used with the Universal Base to view the internal condition of a main throughan integral Perspex window. (Low pressure only).
Undercarriages(PE and Ferrous Mains)
Permits the Universal Base to be fi tted to a PE main using a Fusion Saddle and to ferrous mains fi tted with pressure drilling saddles and Repair Clamps.
Blanking Cap
Used as a temporary (overnight) cap to prevent the ingress of dirt into the Universal Base and as an anti-tamper device.
Extension Lugs, Chain supportsand Spreader Plates
Components used to maintain the required chain angles on mains of diameters greater than 12 inches during drilling operations.
Swarf Magnet
Used immediately after drilling a ferrous main for the removal of swarf.
Drill Taps
A comprehensive range of long life Drill Taps and Holesaws are available to suit all pipe materials.
Sales and Services
WASK recommend that all equipment is visually inspected after each use and serviced at nine monthly intervals.
Drilling Machines, Bagging-off, Bypass and Ancillary Equipment may be obtained direct from WASK or from appointed distributors. Names and addresses are available on request.
Gas Bagging-off & Ancillary Equipment
Emid Mains Completion PlugMalleable iron, suitable for the closure of tapped holes in distribution mains up to 2 bar pressure.
Mains Completion Plugs
Non-Tap PlugManufactured under licence from British Gas plc. Designed for the closure of non-tapped holes following fl ow stopping operations. Spare gaskets available separately.
Size Rs Part No.Galvanised
Part No. Black
3/4” AY0014 AY0001
1” AY0015 AY0003
11/4” AY0005
11/2” AY0016 AY0006
2” AY0017 AY0007
Size Rs Range
11/2” AW0003
3” AW0005
4” AW0007
5” AW0009
6” AW0011
12
Bypass EquipmentSection 3:
Design & PerformanceBy utilising the base of the Universal Drilling Machine, this latest generation equipment enables a temporary fl ow of gas to be provided around a section of polyethylene or ferrous main which is undergoing maintenance or repair.
Supplied in kit form, the equipment provides the means to connect a full bore 3” bypass around a mains maintenance operation subject to the maximum size of drilled and tapped hole allowed by regulations. The pressure limitation is 7 bar with a rigid bypass, rated with that of the Universal Drilling Machine. Flexible “Riders” are available for low pressure applications.
Incorporated within the Bypass Head is a 1” vent and purge valve and a 3/8” valved pressure test probe which can be inserted through the main tapping into the full gas fl ow.
Specifi cationsBritish Gas PS/E1
Bypass
13
Pressure test probe fully entres gas stream
Reinforced 3” outletfor by-pass
Purge/test valve
14
32mm PE Purge ToolSection 4:
IntroductionPrior to commencing repairs on a section of polyethylene gas mains, all traces of gas must be eradicated to ensure that such operations can commence in safety – a process called purging.
Similarly, when commissioning a new length of PE main, purging is necessary to remove all traces of air from within the pipe – to prevent the possibility of creating a potentially explosive mixture.
Unfortunately, conventional techniques have a number of drawbacks, when using standard fusion service tees as a purge point.
a) Expensive – requires tapping tees plus additional elbows and couplers to be fi xed to the main to provide entry and exit points for the purge gases involved.
b) Slow – not only do these systems require several jointing operations but also the holes created by the service tee’s integral cutters are relatively small and consequently purge rates are slow.
c) Closure – the sealing of a tapping tee requires an electrofusion cap and is permanent.
WASK, the leading name in manufacture of underpressure drilling equipment for both gas and water mains, has provided the solution to these problems – the PE PURGE TOOLS. These robust tools have been specially designed to fi t onto the external threads used for the closure cap of a 32mm and 63mm diameter PE purge saddles allowing for quick, economical and totally safe controlled purging of polyethylene gas mains. These easy to operate tools operate the purge saddle’s integral cutter, cutting through the pipe wall, via a central spindle. A full bore ball valve permits the removal of the integral cutter from the tee whilst under pressure – not possible with existing tapping saddles.
The spindle and bearing assemblies can then be removed from the closed valve and subsequent purging operations are totally controlled via the ball valve which allows the integral cutter to be reinserted into the saddle to act as an internal plug. The plastic closure cap seals the fi tting following the removal of the tool.
Benefi ts of using the WASK PE purging tool include:a) Saves Times – requires only one
fusion joint per purge saddle, where as existing systems require several. Purging operations are quicker.
b) Cost Effective – utilises lower cost purge saddles compared to tapping tees and associated fi ttings.
c) Safety – use of a full bore valve permits the main to be isolated while removing the integral cutter from the purge saddle. Consequently the purging operation is under total control.
d) Robust Design – with full corrosion protection.
e) Compatible – with electrofusion purge fi ttings.
f) Re-usable – the purge point can be re-used.
g) Pressure Monitoring – the system can be used to construct a temporary pressure point.
h) Risk – the purge fi tting has a low profi le above the main minimising the risk of potential interference damage.
32mm PE Purge Tool
15
Operationa) Remove the cap and electrofuse
the purge saddle to the main in accordance with manufacturer’s instructions.
b) Fit the spindle hexagon to the cutterin the PE purge outlet.
c) Slide the complete assembly, including the bearing, ball valve and adaptor over the spindle and tighten with hand pressure to seal the ‘O’ ring in the adaptor onto the top of the purge saddle.
d) Engage a ½” ratchet spanner onto the top of the spindle and rotate in a clockwise direction to punch the pipe utilising the purge saddle’s integral cutter.
e) Withdraw (unscrew) the cutter completely from the purge saddle, then raise the spindle to the stop ring.
f) Close the valve.
g) Detach the bearing, spindle and cutter from the valve by rotating in an anti-clockwise direction with an open ended spanner.
h) Attach vent pipe and purge throughthe valve in accordance with industry procedures.
i) On completion of the purging, reassemble the bearing together with the spindle/cutter assembly back onto the valve.
j) Open the valve and return the integral cutter to the purge saddle. Detach the spindle from the cutter with a sharp pull upwards and then disengage the complete tool from the branch by rotating in an anti-clockwise direction.
k) Fit the PE closure cap and test for soundness.
ConstructionSpindle and Bearing:
Mild Steel
BS 970 230 M07Electrozinc plating to BS 1706 Zn3
Valve Assembly:
Mild Steel, plated for corrosion protection
Adaptor:
Aluminium LM25 or Acetal
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32mm PE Purge Tool
16
17
Mini-Drill For WaterSection 5:
IntroductionWASK are leading manufacturers and worldwide supplies of a range of underpressure drilling equipment for use with pipes of various materials and diameters.
The Mini-Drill has been specifi cally designed to overcome the drawbacks associated with many existing machines including excessive weight, cost and poor versatility. Several years of investment, research and development and close liaison with water engineers have resulted in a machine which has the capability of drilling, tapping, inserting and removal of ferrules (swivel type) up to 1”, at mains pressure up to and including 16 bar (240lb/in2). In addition, the Mini-Drill can operate on a wide range of pipe materials including cast iron, ductile iron, steel, asbestos cement and PVC mains.
In conjunction with the wide range of undercarriages and sealing saddles available, this machine can drill and tap holes up to 1 ½” BSP* diameter. Using the chains supplied, the Mini-Drill can perform these wide variety of tasks on mains from 3” (80mm)to 12” (300mm) diameter.
Design
Durability and safety were the key parameters in the design of the Mini-Drill. The machine base is the primary interface with the pipe and features interchangeable saddles to ensure accurate machine location. The base comprises two halves, each manufactured from high grade, heat treated aluminium which provides the machine’s characteristic high strength and low weight. The base incorporates a safety lock and automatic purging facility and also features a Tefl on coated steel sliding valve plate which gives the operator the ability to isolate the pressure in the main from the drilling canopy. This feature also enables the insertion and removal of service fi ttings, plugs etc.
Benefi ts of using the Mini-Drill includes:
Versatility:
Not only will the Mini-Drill drill, tap and insert ferrules, but it can carryout these tasks on a wide variety of pipe materials.
Materials:
Advanced manufacturing methods have resulted in a machine which competes with pipeline access equipment at twice the price.
High Performance:
Manufactured to operate at pressures of 16 bar (water).
Reliability:
High percentage non-ferrous construction means that the Mini-Drill has a good resistance to corrosion. Additionally, the drilling spindle operations in a substantial bronze bearing, ensuring both long life and accurate drilling and tapping.
Safety:
A combination of a proven design and locking buttons has resultedin a machine with the utmost regard for operator safety.
Compact
Peace of Mind:
The Mini-Drill is manufacturedby a Company with a fi rst class reputation in the fi eld of pipeline access equipment and benefi ts froma nation-wide servicing network.
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Mini-drill
18
19
AquaStop For WaterSection 6:
IntroductionAquastop has been developed to stop water fl ow with minimal disruption – quickly, easily and at a low cost.
Aquastop is a revolutionary, unique new product designed to provide an easy low cost solution to stopping fl ow in an operating pipeline. Aquastop can be used to isolate piping systems for repair, alterations and renovation.
Based on proven technology, Aquastop is the result of 3 years research and development into a simple low cost method of fl ow stopping, enabling water mains repair, maintenance or renovation with minimal disruption to customers.
The system involves an infl atable Hydrabag inserted into the mains with specialist launch equipment, through a small diameter access hole. The bag is infl ated by means of water pressure in the mains, through a specially designed pressurisation unit.
The system comprises of lightweight easy to use equipment, for small diameter mains at up to 6 bar pressure. Suitable for either single or double ended fl ow stopping operations. Hydrabag is a trademark of SARCO Stopper Ltd.
AquaStop
20
Small access holes mean simple, low costconsumables can be used.
Benefi ts of using AquaStop include:
Flow stop is achieved with minimal disruption to customers.
Equipment is lightweight and easily transported.
Minimises the extent of excavation and reinstatement, providing substantial savings in labour, materials and equipment.
Small diameter access holes (1” to 1 ½ “) do not weaken the integrity of the pipe, enabling the use of low cost consumables. The need for expensive stopple tees is eliminated.
Lightweight equipment enables easy, fast operation – even in restricted areas.
No additional, independent power source is required for kit operation.
Suitable for most pipes including cast iron, ductile iron, steel, PVC and PE.
Minimises the level of system chlorination required after the operation.
Operationa) Dill and tap by-pass holes.
Fit by-pass nipples and valves – connect by-pass.
b) Drill and tap bagging holes.
c) Fit bag and support blades to bagging unit, test and set bag.
d) Withdrew bag with bagging unit, close blades.
e) Lower bag tube into main, open support blades, insert bag.
f) Connect infl ation hoses to bag infl ation tubes.
g) Infl ate bags. At this point the main will shut off.
AquaStop
Hydrabags™ are infl ated by mains water pressure.
Retractable blade mechanismprovides bag support.
Maximum diameter of access hole is 1 1/2” for a 6” fl ow stop.
21
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66
• 4
mm
A/F
Rat
chet
Spa
nner
JC0
51
8 •
12
mm
A/F
Pin
Wre
nch
JC0
52
6
Span
ner
JC0
52
7 •
16
mm
A/F
Com
bina
tion
Span
ner
GJ0
04
2
Larg
e Sp
anne
rG
T0011
Drif
tJC
02
10
Bag
Ven
t A
dapt
orEA
01
97
Rat
chet
Spa
nner
JC0
23
7
Cha
in S
etEA
01
95
Nos
e A
ssem
bly
EA0
20
3 •
4”
EA0
20
4 •
6”
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