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.

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.
required.
                                                                                                 Versatile
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

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.

Note:

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. 

  

 

2. Preheat joint area to approximately 212 degrees

F (100 degrees C) minimum. Preheating reduces

installation time and ensures proper bonding.

Note:

Two people working on opposite sides of the

pipe are recommended for installing sleeves

on pipe 16" (400mm) in diameter and larger

3. 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.

Note:

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

evenly.

4) Position overlap to permit easy access for

installing closure. 

                                                                                                                                                                        

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.

                                                                                                                                                                   

Sleeve Recovery

 

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.

Note:

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 

   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.