PETROTAPE ( PTY) LTD.
Pipe wrappings, adhesive tapes and associated products
* Application of the Petrotape system to couplings and flanges*
Remove all loose millscale, paint (that is not supposed to be there),
old coating and the like by abrasive blasting or wire brushing.
File down all protruding sharp points and rough edges. Wipe off all
moisture on the coupling with a dry, clean cloth.
Apply either Petroprimer by brush or Petropaste by gloved hand to the
clean, dry coupling surface. Ensure a uniform coating over the entire pipe
Avoid doing the priming application in wet or very dusty (with wind)
Please note that the Petroprimer is flammable and so all necessary precautions
should be taken, specially with regard to open flames (such as cigarettes)
near to the storage or application sites.
Pack Petromastic into and around the coupling / flange / irregular
shape to provide an even contour around which the tape can be later applied.
The mastic putty should be packed so as to cover all bolts, bolt heads
and any other irregular shapes which would otherwise leave air pockets
if only a tape were applied.
A sufficiently wide width of Petrotape shall
then be applied over the whole coupling or flange overlapping by about
25%. The tape is then smoothed by hand following the contour of the
joint, thus eliminating any air that may be trapped underneath the tape.
An outer layer of layflat sheeting of sufficient width to cover the
whole joint is then applied over the tape with about a 50% overlapping
of the ends. Each side of the plastic is then secured to the joint
by using the self adhesive securing tape which is wrapped around the plastic
covering on each side of the coupling.
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