Here is how it works:
- The fitting with the Koppl-Stop™ Flange is installed on the pipeline.
- The temporary valve is installed and tested.
- The hot tap is performed and the coupon removed.
- When the necessary work is performed, the completion plug setting unit is installed on the valve.
- The completion plug is installed in the flange. ...
Full Answer
What is a stopple in a pipeline?
stopple. A procedure used in the repair of a pipeline to isolate a section of line in the absence of a shutoff valve. When the repair is completed, the plug is withdrawn and a valve, installed on the saddle flange, is closed. Click to see full answer.
How does a stopple fitting work?
How does a Stopple fitting work? A true innovation in plugging technology, the STOPPLE® Train system allows two plugging heads to be inserted through a single fitting. When the void between the heads is bled down, the seal on the secondary head provides double block and bleed pressures up to 1,480 psi.
What is the stopple® train plugging system?
The STOPPLE® Train plugging system utilizes proven TDW STOPPLE technology to provide the safety of inserting two plugging heads through a single fitting. The void between the two plugging heads can be bled down to provide a zero energy zone.
What is the purpose of a pipeline isolate?
A procedure used in the repair of a pipeline to isolate a section of line in the absence of a shutoff valve.
How does Stopple work?
After welding a flanged saddle to the pipe, the line is hot tapped—a method of making a connection to existing piping or pressure vessels without the interruption of emptying that section of pipe or vessel—and an expanding resilient plug is inserted into the pipe bore.
What is a Stopple in pipeline?
1. n. [Production] A procedure used in the repair of a pipeline to isolate a section of line in the absence of a shutoff valve.
How do you Stopple?
Remove bleeder valve and 2-in. valve from STOPPLE Housing....Retract STOPPLE Plugging Head.When pressure is equalized, leave 2-in. ... Raise STOPPLE Plugging Head.Close Sandwich Valve.Close 2-in.More items...
How does a hot tap on a pipe work?
The hot tap procedure involves attaching a branch connection and valve on the outside of an operating pipeline, and then cutting out the pipe-line wall within the branch and removing the wall section through the valve. Hot tapping avoids product loss, methane emissions, and disruption of service to customers.
What is a Stopple plug?
TDW STOPPLE® Plugging Machines serve as temporary block valves installed anywhere in a piping system. They are used to isolate a section of line for repairs or additions without interruption of service.
How does a sandwich valve work?
Sandwich valves make compact hydraulic systems in which specific function valves are “sandwich” mounted between a directional valve and a standard mounting surface. Sandwich valves eliminate inter valve piping and leak-prone tube and pipe connections.Jan 6, 2018
What is a Tor pipe?
THREAD-O-RING™ Fittings (T-O-R) are used with TDW STOPPLE® Plugging Machines as purge and equalization fittings. They can also be installed during new construction and used for blowdown connections on either side of a block valve. T-O-R Fittings are available in two sizes: 2 in.
What is cold tapping in pipeline?
Cold Tapping is a term used to describe a method of tapping into a live pipeline, tubing, or well casing without the need to do any welding or hot work. Cold taps are used to safely check for or release unknown pressure or fluid in piping.
How do you tap into a pipe?
0:004:42Tapping of a Steel Pipe with the EWE Ball Valve Tapping Fitting - YouTubeYouTubeStart of suggested clipEnd of suggested clipIn preparation for tapping the shutoff function of the ball in the ball valve fitting must beMoreIn preparation for tapping the shutoff function of the ball in the ball valve fitting must be checked by quickly opening and shutting it with the tapping device.
How do you tap pressurized water pipes?
You place a hot tap service saddle or sleeve onto the line. You add a valve and test the connection under pressure with a hydrostatic pump. Then you place the hot tap machine onto the value through a water tight packing gland, open the valve and lower the cutter and retention pilot down until it touches the pipe.
Size
High-pressure STOPPLE® fittings are designed for use with TDW STOPPLE plugging machines. The ProSeries™ Advantage standardizes the fittings to fit a broader range of specifications, reduce the need for costly customization, ensure consistent quality and shorten lead time.
Key Features
Fittings are constructed with a controlled carbon equivalent to improve welding in harsh environmental conditions
