50/51 Scotchrap All-Weather Corrosion Protection Tape
50 Scotchrap All-Weather Corrosion Protection Tape
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50/51 Scotchrap All-Weather Corrosion Protection Tape

10 & 20 Mil • Super Heavy Duty Protection for Underground Pipes
By: 3M

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Overview
This premium polyvinyl chloride (PVC) tape with a high-tack adhesive provides a corrosion and impact resistant seal for all-weather protection of mill-coated metal piping and electrical conduit systems, above and below ground.
Tape 50 is 10 mils thick.
Tape 51 is 20 mils thick.

These tapes are:
Resistant to corrosive salt water, soil acids, alkalies and salts, common chemicals, chemical vapors, and exposure to outdoor weathering and sunlight.
Resistant to impact, abrasions, punctures, and tears.

• Highly conformable, all-weather tape designed for application over a wide temperature range
• Very high dielectric break down voltage: 12,000 volts/Type 50 and 20,000 volts/Type 51
• Easy to apply without special tools or dangerous flame
• When wrapping metal pipe, use of Primer #42768 is recomended to improve adhesion


Heavy on the technical side...When applying this tape, a few general application procedures should be followed to obtain optimum performance.
Surfaces to be wrapped should be clean, dry and free of oil, grease, and other contaminants.
Blast removal of rust and scale is preferred.
Welding slag and spatter, sharp edges or burrs should be chipped, grinded or filed.
Apply a uniform, continuous coating of the pipe primer to the prepared surface and let dry.
Fill in irregular surfaces with the putty.
Cover weld bead with one wrap of tape over the entire surface.

Straight pipe and conduit are normally spirally wrapped using tape width listed in coverage table; see: http://multimedia.3m.com/mws/mediawebserver?mwsId=SSSSSuH8gc7nZxtUNx_UOxMSevUqe17zHvTSevTSeSSSSSS--&fn=78-8129-9283-8.pdf
Field joints on mill-coated pipe can be wrapped spirally or with a cigarette wrap or wide tape.
Unusually severe construction or soil conditions may require additional tape thickness or protective overwraps.

For below ground installation adequate provision should be taken to protect the coating from physical damage during pipe handling, lowering or backfilling operations.
The pipeline ditch should be free of rock or other sharp objects so the coated pipe rests on a smooth bed of soil.
Backfill materials should also be free of rock or other sharp objects to avoid damage of the coating.
After layer of debris-free soil has covered the pipe, general backfill may be used.
 
 
 
 
 
 
 

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