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Hot Tapping Machines
Certified Training With
Wet Tap Machine & Hot Tapping Kit


“40+ years of hot tap machine and line stop machine experience built into each hot tap machine with dependable coupon retention using our hot tapper.”
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  • 1/2-4" MACHINES
    • All Tapping Machines
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    • All Big Tapping Machines
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Pipestop-100 Linestop Machines and Equipment

Pipestop-100 Lollipop Linestop Machine

The Pipestop 100 is a lightweight piece of equipment that is easily used for stopping low-pressure lines, 4" - 12", on most types of pipelines and fluids.

Maximum line pressure: 100 psi. Maximum Temperature: 350° F (121° C)

Step-by-step
A special line stop fitting is installed on the pipeline either by welding or using a mechanical seal. After pressure testing, a temporary valve is installed onto the fitting.

First, a hole is made in the pipe with a special cutter. When the pressure tap is completed, the cutter and coupon are retracted into the tapping machine and the temporary valve is closed. If bypass taps are required, they are also made at this time.

The tapping machine is removed from the temporary valve and is replaced by a line stop machine. The valve is opened and the line stop plugging head is lowered in place, which cuts off flow in the pipeline.

To verify the effectiveness of the plugging head seal and to test the seal’s efficiency, a bleed-off point must be used. By opening the bleed-off and reducing the pressure on the downstream side of the head, or in the case of double line stops, in between stops, the pipeline pressure is used to help seal the plugging head.

When the work is completed and the line stop must be removed, line pressure is equalized on the "dead" side of the plugging head. This allows the head to be retracted and the line to be put back in service.

To complete the operation, the line stop machines are removed and completion machines are installed onto the temporary valves. A special closure plug is installed into the outlet flange of the line stop fitting, and the line stop machines and temporary valves are removed. Finally, a blind flange is usually installed to finish the line stop operation.

Pipestop-100

 

Pipestop-100 Operation Specifications:

Pipestop-100 2D Install Image

Operation, using the Pipestop 100, can be repeated at a later date; many pipe and gas companies install line stop fittings instead of valves at points where a valving action will inevitably be required.

Types of line stops
Four types of line stops or pressure plugs get the job done:

Cylindrical plug
A cylindrical plug - made of elastomer or steel - is used to stop the line by sealing against machined surfaces.

Elastomer cup
An elastomer cup seals against the pipe bore. This popular seal is affected by line pressure and is available in the greatest range of pressures and sizes.

Expandable elastomer
An expandable elastomer stopper seals against the bore of the pipe. This type is for low-pressure applications only.

Inflatable gas bag
An inflatable gas bag or balloon seals against the bore of the pipe. This seal is generally independent of line pressure and must be restricted to very low pressures.

Technique
When line stopping, determining the best method is extremely important. There is no universal line stopping technique and the right technique depends on the following variables:

- temperature;
- pressure;
- size of main and wall thickness;
- interior condition of main deposits, corrosion, weld beads, etc.;
- duration of the line stop;
- degree of leakage tolerated; and,
- the flowing medium.

Complete, "bubble tight", shutoff is difficult to achieve. When it is achieved, it is usually the result of good job site techniques. On hazardous jobs, like steam or flammables, the use of special flanges can maintain a safe environment. (Pipe O.D. - (2 x Pipe Wall) = I.D.) This simple formula can be the most important factor in reaching a "bubble tight" shutoff. The pipe I.D. must be verified for every line stop.

Pipestop-100 with Bypass

Ask about our bypass options!

Pipestop100 100 psi. Item # Price ANSI Flange Rating 150

4" PipeStopHead

PSH-0004-100

Call

 

6" PipeStopHead

PSH-0006-100

Call

 

8" PipeStopHead

PSH-0008-100

Call

 

10" PipeStopHead

PSH-0010-100

Call

 

12" PipeStopHead

PSH-0012-100

Call

 
       

4" Linestop Cup

BNLC-03875-0040

Call

 

6" Linestop Cup

BNLC-05875-0060

Call

 

8" Linestop Cup

BNLC-07875-0080

Call

 

10" Linestop Cup

BNLC-09875-0100

Call

 

10" Linestop Cup

BNLC-09875-0100

Call

 

4" - 8"  LS Housing

PSH-04X3-100

Call

ANSI 150

10" -12"  LSHousing

PSH-04X3-100

Call

ANSI 150

       

4" – 8" Pivot Ball assembly w/Plates

PSB-0150-100

Call

1 ½" I.D

10"–12" Pivot Ball assembly w/Plates

PSB-0200-100

Call

2" I.D

4" – 8" Stainless Short Bar

OSB-150-NB-100

Call

 

4" – 8" Stainless

XL Bar for Bypass

OSB-150-XL-100

Call

 

10" – 12" Stainless

Short Bar

OSB-200-NB-100

Call

 

10" – 12" Stainless

XL Bar for Bypass

OSB-200-XL-100

Call

 
       

4" – 8" Crosstop

CTB-150-PS-100

Call

 

10" – 12" Crosstop

CTB-200-PS-100

Call

 
       

4" - 8" Cross Bar

COB-150-PS-100

Call

 

10" – 12" Cross Bar

COB-150-PS-100

Call

 

Fig F77-W4B Fabricated Knife Gate Valves -  Fabricated Steel -304 stainless gate and liner-Bi-directional resilient seat ½" over size bore

275 psi. cwp / 150Degree (F)

 

Call

 

4" - 8" PS Valve

8 1/2" Port

FKG-0850-275

Call

275 psi  cwp

10" - 12" PS Valve

12 1/2" Port

FKG-1250-275

Call

275 psi  cwp

       

8" x 4" Valve Adapter

DMF-0408-275

Call

ANSI 150

8" x 6" Valve Adapter

DMF-0608-275

Call

ANSI 150

10" x 12" Valve Adapter

DMF-1012-275

Call

ANSI 150

       

4" - 8" Completion Plug Holder

CPH-0408-275

Call

 T-24 & H-30

10"-12"Completion Plug Holder

CPH-1012-275

Call

T-24 & H-30

Optional Equipment Item# Price ANSI Flange Rating 150

4" PS Valve

4 ½" Port

FKG-0450-275

Call

275 psi

6" PS Valve

6 ½" Port

FKG-0650-275

Call

275 psi

10" PS Valve

10 ½" Port

FKG-1050-275

Call

275 psi

Completion Plug Tool (thread-in)

10" – 12" Adapter

CPT-0408-275

CPA-1012-275

Call

150 psi

ANSI 150

4" Tap/Linestop Adapter

PSA-0004-275

Call

275 psi.

ANSI 150

6" Tap/Linestop

Adapter

PSA-0006-275

Call

275 psi.

ANSI 150

8" Tap/Linestop Adapter

PSA-0008-275

Call

275 psi.

ANSI 150

10" Tap/Linestop Adapter

PSA-0010-275

Call

275 psi.

ANSI 150

12" Tap/Linestop Adapter

PSA-0010-275

Call

275 psi.

ANSI 150

4"  Housing

PSH-0004-100

Call

ANSI 150

6" Housing

PSH-0006-100

Call

ANSI 150

10" Housing

PSH-0010-100

Call

ANSI 150

Bypass Housings

Require XL Actuator bars

 

Call

 

4"  Housing

w/3" Bypass Outlet

PSH-04X3-100

Call

ANSI 150

6" Housing

w/ 4" bypass outlet

PSH-06X4-100

Call

ANSI 150

8"  Housing

w/6" Bypass Outlet

PSH-08X6-100

Call

ANSI 150

10" Housing

w/ 8" bypass outlet

PSH-10X8-100

Call

ANSI 150

12" Housing

w/10" bypass outlet

PSH-1210-100

Call

ANSI 150


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