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Monday, March 24, 2014

WPC 100M Installation Guide

WPC 100M

Wraparound Pipe Sleeve for Field Girthweld Corrosion Protection.

WPC 100M heat-shrinkable wraparound sleeves are designed for corrosion protection of girthwelds:
  • On buried pipelines operating continuously at temperatures up to 80 degrees C (176 degrees F) when exposed directly to soil.
  • On offshore or preinsulated pipe at up to 100 degrees C (212 degrees F).
WPC 100M sleeves have a thick radiation crosslinked polyolefin backing coated with a specially formulated high-temperature mastic sealant. During installation the adhesive melts and flows, filling all surface irregularities, bonding to metal and adjacent coating surfaces. The flexible closure is coated with a high shear-strength adhesive and is normally kitted with the sleeve; however, it is available pre-attached to the sleeve in the UNISLEEVE construction.

Wraparound pipe sleeve for field girthweld corrosion protection

Simple installation                                                                     Resist adverse environments
To install, wrap the sleeve around a clean,                                                              WPC 100M sleeves resist temperature
preheated pipe. A flexible closure forms the                                                          cycling, soil stresses and hydrostatic pres
sleeve into a tube. The sleeve is then torch-                                                           sure. They demonstrate high resistance to
shrunk around the pipe. WPC 100M sleeves                                                             ultraviolet light, fungus, cathodic disbond-
are installed with simple tools. No powder,                                                             ment and chemical attack by common fluids
primer or sophisticated equipment is                                                                       and solvents.
Rugged and mechanically strong                                               WPC 100M sleeves are compatible with all
WPC 100M sleeves resist abrasion, impact                                                               standard pipe coatings and outer jackets,
and penetration, yet remain flexible even at                                                          including fusion-bonded epoxy, polyethylene,
very low temperatures. No rock-shield is                                                               tape and coal tar. The product has a long
required.                                                                                                                  shelf-life when stored correctly.


Materials and Equipment needed for Install

1. Appropriate size WPC 100M sleeve and WPCP IV closure
2. Raychem torch (or equivalent)
3. Propane gas tank, hose, regulator and gauge
4. Contact pyrometer
5. Hand roller (straight)
6. Standard safety equipment such as gloves, goggles, hard hat, etc.

* Installation has to be done according to local government regulations and usual safety precautions.


Sleeve Application

Clean pipe prior to WPC 100m installation 1. Clean exposed steel and adjacent pipe 
coating to be covered by WPC 100M sleeve
with a hand or power wire brush, to remove 
loose and foreign materials. Wiping may be 
necessary to remove the particles from cleaning.
Coal tar - remove outer paper wrap 5" to 6"
adjacent to cut-back to expose coal tar.

Painted coatings - remove whitewash paint on
the surface of coating to be covered by WPC
100M sleeve. 

Pre heat pipe to 212 degrees F 

2. Preheat joint area to approximately 212 degrees
F (100 degrees C) minimum. Preheating reduces
installation time and ensures proper bonding.
Two people working on opposite sides of the
pipe are recommended for installing sleeves
on pipe 16" (400mm) in diameter and larger

Place WPC 100M on preheated pipe weld3. Remove the protective release plastic from
the coated sleeve. Center sleeve over the 
weld so it is evenly overlapping adjacent pipe
coating. Wrap loosely around pipe.
1) Clean overlap area of the sleeve to
remove dirt and other foreign materials.
2) Edges of sleeve should extend 2" or more
onto adjacent pipe coating.
3) Overlapping ends of sleeve should align
4) Position overlap to permit easy access for
installing closure. 


WPCP IV Closure Application
Joint Specialist preattaches closure for easy installation 
1. Press the WPCP IV closure in position,
centering over the exposed sheet end. (For
UNI-sleeve products, the closure is 
preattached and already centered in position.)

The sheet should overlap the sheet
(excluding closure) by 2" (50mm) minimum

 2. Using a Raychem torch (or equivalent), adjust flame length to approximately 20"
(500mm) to produce a yellow flame. Using the yellow portion of the flame, heat the 
closure evenly until the pattern of the fabric reinforcement is visible.

Using gloved hand, pat down the closure and smooth any wrinkles by gently working them
outward from the center of the closure.

Heat closure evenly


Sleeve Recovery

Heat circumferentially aound pipe 

1. Using the Raychem torch (or equivalent), 
begin at the center of the sleeve and heat
circumferentially around the pipe, using a 
constant paintbrush motion.

Heat from one end of WPC 100M sleeve to the other 

2. Continue heating toward one end of the
sleeve, followed by the other.
Sleeve may be recovered starting at one end
and proceeding toward the opposite end,
depending on conditions (i.e., wind).
Run roller over sleeve 
3. When the sleeve has been shrunk onto the
joint area, run a small hand roller over the
sleeve to push out any trapped air.
Finalize flat surface 

 4. Particular attention should be paid to the 
weld and cut-back area.

Check for full recoverd sleeve 
5. Sleeve is fully recovered when all of the
following have occurred:
1) There are no cold spots or dimples on the 
   sleeve surface.
2) Weld bead profile can be seen through
  the sleeve.
3) After sleeve is cool, mastic flow' is evident
  on both edges.
4) The sleeve has fully conformed to the pipe
  and adjacent coating.

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