Rubber and Plastic Coated Pipe Hangars and U-Bolts 1

[noah4321]

Are there any downsides to rubber and plastic coated pipe hangars and U-bolts? I don't understand why metal hangars are the standard when you can avoid corrosion concerns by coating them. I imagine rubber will eventually become brittle and fall off, but perhaps a plastic material won't.

 

[dbill74]

Cost. The hangers and U-bolts will cost a little extra per unit. That 'little' extra cost becomes 'a lot' extra when multiplied 1,000 or 10,000 times.
Also, I'm thinking the rubber/plastic will erode and eventually you end up with metal on metal anyway.
Unless you are in a corrosive environment (outdoors on the coast), I don't see coated hangers and U-bolts being worth the cost.

 

[LittleInch]

Unfortunately dbill is almost certainly correct.

CAPEX rules the world when building things and too often the client doesn't make a fuss or sometimes doesn't care about OPEX as the team doing the building often don't get to see the results in 15 years time...

It takes time and effort to get this requirement into company standards and specifications, so unless it is in there at the start, the EPC contractor sure won't insert it.

I assume you mean something like this

http://stoprust.com/i-rod-pipe-supports/

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[noah4321]

Thanks for the replies! These answers make sense. And we are right on the Gulf Coast.

 

[SlideRuleEra]

For coastal regions, consider hangers that are hot-dip galvanized after fabrication. Zinc has the advantage over coatings of protecting spots where surface damage has occurred. Hot-dip galvanized hangers are available, and if not, plain steel hangers can be galvanized by a third party. See page 19 of this link:
Eaton Pipe Hangers & Supports

http://www.SlideRuleEra.net

http://www.VacuumTubeEra.net

 

[lilliput1]

Uninsulated copper piping should use plastic coated hangers to avoid galvanic corrosion.

 

[MikeHalloran]

The Stop-Rust product and similar are customary (or mandated by many company standards) for use on GOM oil rigs, mostly to prevent crevice corrosion between the pipes and the u-bolts or brackets.

Mike Halloran
Pembroke Pines, FL, USA