A193-B8M bolt
A193-B8M bolt
(OP)
Dear experts,
The bill of material states A193-B8M bolts is required to bolt 24" shell manhole. In other engineering notes it is stated the external bolts shall be floro carbon. My understanding A193-B8M is AISI 316 material (stainless steel)
It is possible to floro carbon the stainless steel bolts ?
Thanks and regards,
Syah
The bill of material states A193-B8M bolts is required to bolt 24" shell manhole. In other engineering notes it is stated the external bolts shall be floro carbon. My understanding A193-B8M is AISI 316 material (stainless steel)
It is possible to floro carbon the stainless steel bolts ?
Thanks and regards,
Syah
RE: A193-B8M bolt
Suggests a Teflon coating. Why this would be considered necessary on a 316SS fastener I cannot guess.
I am generally skeptical of non-metallic protective coatings on fasteners.
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: A193-B8M bolt
RE: A193-B8M bolt
RE: A193-B8M bolt
When a fastener is coated, the identification etched on the item is typically lost. Having various coating colors available can be an advantage.
(i.e stainless - yellow, low carbon steel - blue, carbon alloy - green..... etc.
In well organized and planned operations, many clients require different colors for stud/nut/bolt material combinations. This help prevent mix-ups and substitutions that can be expensive and dangerous. Inspection and maintenance is made simpler....throughout the life of the plant.
I have been to many plant sites where management does not pay any attention to bolt management and simply gives up and specifies that only the strongest (and most expensive) bolts are used on site. This is an expensive and often lame brained solution
Of course, you can still have uncoated bolts for special cases.
https://www.metcoat.com/assets/files/Fluorokote1Br...
MJCronin
Sr. Process Engineer
RE: A193-B8M bolt
RE: A193-B8M bolt
I guess I am skeptical because I have only seen such fasteners after the coating has failed and the barrier breached.
I have trouble wrapping my head around the idea that any plastic coating can survive the necessary torqueing.
"Everyone is entitled to their own opinions, but they are not entitled to their own facts."
RE: A193-B8M bolt
RE: A193-B8M bolt
I have found the cost of coating to less than machining out a seized stud or bolt.
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P.E. Metallurgy, Plymouth Tube
RE: A193-B8M bolt
Is there any standard color for florocarbon bolt and nut ?
I look at again the drawings and found the bolt specs is A193B7 with note :florocarbon. The supplier gave us bolt not green color bolts and nuts.
Looking to your snapshot green is A193L7.
Syah
RE: A193-B8M bolt
RE: A193-B8M bolt