Stainless Steel Ball Valve with Galvanised Bolts
Stainless Steel Ball Valve with Galvanised Bolts
(OP)
Hi
I have a client who is insisting that we use A320 L7 bolts to secure 316 stainless ball valves. Bolts will be screwed , through a stainless steel 316 flange and into threaded blind holes on the valves bodies so I can't use insulation on the full bolt lenght.
I know stainless is more nobel then the galv steel, so does this mean that the bolts will get "eaten" pretty quickly?
Enviroment is offshore but valves will not be immersed.
Thanks
Trouble
I have a client who is insisting that we use A320 L7 bolts to secure 316 stainless ball valves. Bolts will be screwed , through a stainless steel 316 flange and into threaded blind holes on the valves bodies so I can't use insulation on the full bolt lenght.
I know stainless is more nobel then the galv steel, so does this mean that the bolts will get "eaten" pretty quickly?
Enviroment is offshore but valves will not be immersed.
Thanks
Trouble





RE: Stainless Steel Ball Valve with Galvanised Bolts
RE: Stainless Steel Ball Valve with Galvanised Bolts
RE: Stainless Steel Ball Valve with Galvanised Bolts
If the environment is offshore, then it is a Marine environment and there will be salt in the air. So unless this is a desert marine environment where it never rains and the metal never will go below atmospheric dew point, expect the possibility of the presence of an electrolyte for this galvanic couple and design accordingly.
rmw
RE: Stainless Steel Ball Valve with Galvanised Bolts
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Stainless Steel Ball Valve with Galvanised Bolts
Thanks for the help!
Trouble