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Joins
pipe without special preparation of pipe ends
PLIDCO
Weld+Ends, a safety welding coupling for crude oil, gasoline, gas,
asphalt, steam, chemical process and other pipelines, joins pipe so that
flow can be resumed immediately at pressures shown in table below.
No special preparation of pipe ends is required. Just cut the pipe and
slide the PLIDCO Weld+Ends coupling on. With clamping and thrust screws
fully tightened, pipe is joined and leak proof seals are completed.
PLIDCO Weld+Ends coupling can be left with screws tightened or they can
be welded. The safest condition for welding on a pipeline is with the
line in operation. If welding is specified, it can be delayed for
several weeks until conditions are safe–with pipeline in operation.
If welding is specified, pipeline is put in operation. Refer to the
chart below for recommended pressures. Thrust screws are cut/burned off
flush. End of coupling is fillet-welded around circumference, including
seal-welding of thrust screws. Clamping screws are cut/burned off and
seal-welded.
Standard PLIDCO Weld+Ends couplings have a single row of clamping screws
at each end. Where excessive end-pulling loads are involved and it is
not feasible to weld, additional rows of clamping screws can be provided
or the PLIDCO Clamp+Ring may be
used.
Available in standard sizes from 1-1/2” through 48”. Special sizes,
diameters, pressures and lengths, on application. Buna-N packing is
standard. Other packing available.
Standard body materials: 1-1/2” thru 2-1/2”, seamless mechanical
tubing; 3” and up, A-106 seamless pipe, A-105 forging, A-285, A-516,
steel plate or equivalent.
PLIDCO
Weld+Ends Coupling Specifications |
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*Pipe
not anchored: A joint in which the pipe ends could move when subjected
to internal or external forces, such as internal pressure, temperature
expansion and contractions, underwater currents, ground movement or any
combination thereof. Working pressure for “Pipe Not Anchored”: sizes
1-1/2” thru 3” is based on wall thickness of Schedule 80 pipe and
heavier; 4” and larger, on wall thickness of Schedule 40 or 1/2”,
whichever is less.
Anchored pipe: A joint in which the pipe ends would not move when
subjected to these same forces. If the PLIDCO Weld+Ends Coupling is
welded according to our instructions, or a suitable
PLIDCO Clamp+Ring is
used, it can be considered an anchored joint. |
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