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Heat shrinkable sheet (SHS-340)

        1. General

SHS-340 is heat shrinkable wraparound sheet designed for corrosion protection of
field-welded joints of plastic coated steel pipes. It has a thick cross linked
polyethylene backing coated with butyl rubber based compound layer.



 
2.    Characteristics
 
a. 
Excellent resistance to abrasion, impact and penetration.
b.    Excellent resistance to temperature changes, soil stress, hydrostatic pressure
 and chemical corrosion.
c.    Excellent resistance to cathodic disbonding, microorganisms and bacteria.
d.    Simple application in all pipe diameters.
e.    No special skills or equipment is required. The sheet us applied within minutes
 using a propane torch.

 
3.    End uses
a.    Corrosion protection for welded joints on gas, oil and water pipes.
b.    Corrosion protection for welded joints on communication and power cables.

 
4.    Installation
a.    Clean the welded joint with a steel brush.
b.    Using a propane torch, heat the welded joint to about 60ºC.
c.    Remove the protective lining from the sheet and center above the welded joint,
 overlapping both sides.
d.    Heat the patch and attach the sheet end. Press into position, centering over
 the exposed sheet end.
e.    Starting from one end of the sheet, heat circumferentially around the pipe in
 order to shrink the sheet. 
f.     Continue heating towards the end of the sheet, while removing trapped air.
g.    Wait for complete cooling.