Exposed Piping 1

[spkreng]

I have a floating dock, several - actually 1400' long with 400' spurs, am doing a dry standpipe. question is rather than use galvanized pipe couldn't I just have it painted and meet the corrosion requirements, all grooved items are factory painted, metra-flex fire loop at all "expansion/contraction" joints

spkreng, CET

 

[sspeare]

Since you say your project is a floating dock, the Standpipe Code, NFPA 14, probably does not appply (a "dock" is not a building). But just for your information, the 2007 NFPA 14 Standpipe Code, at paragraph 6.1.2.4 says the following:

6.1.2.4 "Where corrosive conditions exist or piping is exposed to the weather, corrosion-resistant types of pipe, tube, fittings and hangers or protective corrosion-resistant coatings shall be used."

"Corrosion-resistant pipe" would be galvanized, for example.

"Corrosion-resistant COATINGS, in my humble opinion, do NOT include "paint". Examples of "corrosion-resistant coatings" (epoxy, powder metal, etc.) are in the link to a manufacturer see below .....

 

[pipesnpumps]

Well after reading the relevant code passage above, I would personnally interpret corrosion resistant coating definition includes paint, even enamel paint.

Are you bidding this? Could you provide two bids, a base bid with painted CS and cost adder for int/ext galv?

Painted may meet the letter of the code, but probably won't last.. bird poop, sun exposure, owners hosing down their boats with bleach solution, etc.

 

[spkreng]

no bid, designing, the owner is the installer - yes headaches galore...gonna go with sch. 10 galvanized as they won't go under the dock (scubba painter) to paint pipe and won't find breakage, leaks until it's used.

spkreng, CET

 

[sspeare]

Galvanized piping is the right way. Good luck!