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).
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.
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
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
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
WPCP IV Closure Application
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.
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.
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).
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.
4. Particular attention should be paid to the
weld and cut-back area.
5. Sleeve is fully recovered when all of the
following have occurred:
1) There are no cold spots or dimples on the
2) Weld bead profile can be seen through
3) After sleeve is cool, mastic flow' is evident
on both edges.
4) The sleeve has fully conformed to the pipe
and adjacent coating.