Flanges Rusted bolts ... ?
Flanges Rusted bolts ... ?
(OP)
i have a problem that too much bolts in my plant are rusted and corroded what are the possible ways to fix this problem other than HOT BOLTING what i mean is ways for cleaning ?
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Flanges Rusted bolts ... ?
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RE: Flanges Rusted bolts ... ?
For the last issue it all depends on the cause of corrosion, and where the corrosion has attacked, and how much damage it has caused. The cause can be atmospheric (acid atmospher, salt etc), galvanic (wrong materials against each other), other chemical corrosion types in addition to missing protection and/or wrong types of bolts.
If you want to avoid change of bolts to another type or material, 'sandblasting' by dry co2 might perhaps be an idea (protect windings), in addition to fluids for cleaning and protection.
RE: Flanges Rusted bolts ... ?
SOP was to coat all flange bolts and nuts liberally, all surfaces, with Never-Seez at first and every installation. That protected many of them well enough to re-use after just wire brushing off the bird droppings and such. If they were too corroded to unscrew easily, we'd discard and replace them.
Of course, nothing in that plant required exotic alloys, so replacing a bolt set was probably cheaper than cleaning it anyway.
Mike Halloran
Pembroke Pines, FL, USA
RE: Flanges Rusted bolts ... ?