Threaded hardware used at diver depths
Threaded hardware used at diver depths
(OP)
What is the preferred coating for threaded fasteners used in seawater at depths where divers work? No ROVs. Have used Teflon coated fasteners (nuts, studs) but some speculate that the Teflon coating is damaged as torque is applied. Nitriding the hardware has been suggested but not confirmed as the best solution for seawater. Hardware will be assembled and tightened to a torque value underwater.
Thanks, awol
Thanks, awol





RE: Threaded hardware used at diver depths
Otherwise use waterproof grease and wrap the fitting afterwards
Stephen Argles
Land & Marine
www.landandmarine.com
RE: Threaded hardware used at diver depths
Rgds Naren
Narendranath R
Pipeline engineering is made easy with state of the art computer software, visit www.narendranath.itgo.com.
RE: Threaded hardware used at diver depths
I believe that there is a range of quality in PTFE coated fasteners, based on their sub-layer. I recall different systems employing various plating under the coating such as cadmium or nickel etc. Perhaps if you research this variety you may find an optimum selection.
Regards,
Bill