Painting of galvanized pipe
Painting of galvanized pipe
(OP)
I need to protect sprinkler piping against corrosion under the pier/wharf. I am definetly going to use galvanized pipe.
What do you think about painting the pipe as additional protection against the corrosion?
What do you think about painting the pipe as additional protection against the corrosion?





RE: Painting of galvanized pipe
saludos.
a.
RE: Painting of galvanized pipe
Vita sine litteris mors est.
RE: Painting of galvanized pipe
RE: Painting of galvanized pipe
RE: Painting of galvanized pipe
The environment is sea water. The piping has to be listed for the fire sprinkler service. It looks like the best choice is what Rich2001 proposed.
RE: Painting of galvanized pipe
RE: Painting of galvanized pipe
1. CPVC is not listed for exposed instalation in Ordinary/Extra hazard occupancy.
2. There is no CPVC pipe biger than 3" listed for fire sprinkler service.
3. As per Jonesey, SS is not durable in salty environment.
RE: Painting of galvanized pipe
In SE Aisia ABs from tyoc (made in Australia) is used for fire protection of Kampongs and other structures. Esso weven use it on rigs. This material is available up to DN800 Class 15.
www.tycow
RE: Painting of galvanized pipe
Is this a new instalation? If so, check the local fire regulations for spex (if applicable).
Is the environment salt or fresh water? This will give you two options for suitable materials.
If you must use galvanized pipe, I take it that the connections will be threaded. The primary corrosion areas will be around the connections.
Will this be using fresh water or sea water?
Will the piping system be exposed to immersion (coastal weather conditions or tidal)?
Is cost a major factor?
Will this be a supply on demand or dry flood system?
What is the volume of flow required for this system?
What type of shipping will be using the berths?
Will regular, qualified inspection be carried out?
When you have figured out these specifics, it will help you focus on suitable materials.
Galvanized pipe may be suitable, you will need to take into account galvanic action and possible isolation fron the pumping system to allay this, or will the supply be gravity feed?
Protective coating systems are available for this sort of material. Keep in mind that all coating systems require proper periodic inspection (including galvanised).
SS, cunife and other corrosion resistant metals provide lower maintenance, high instalation cost is a draw back.
PVC pipe? Not exactly fire proof.
RTR pipe is good for brine environments, make sure to specify UV stabilised.
If you must take the cheapest option, galvanized piping with an approved protective coating system (see Hempel for example), may fit your needs.
RE: Painting of galvanized pipe