ASTM A105 vs ASTM A181/1 Flange
ASTM A105 vs ASTM A181/1 Flange
(OP)
Can we use Flange of material ASTM A105 instead of ASTM A181/1 flange material at bottom of Vacuum tower?
Service temperature = 750 Degree Fahrenheit
Service temperature = 750 Degree Fahrenheit





RE: ASTM A105 vs ASTM A181/1 Flange
RE: ASTM A105 vs ASTM A181/1 Flange
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RE: ASTM A105 vs ASTM A181/1 Flange
My recommendation would be to validate that the A105 meets the pressure temperature ratings of the tower, which it should assuming the tower was designed correctly in the first place. If it does, then the A105 is a perfectly acceptable substitution.
RE: ASTM A105 vs ASTM A181/1 Flange
I have always used A105 for low grade CS weld flanges. I can't confirm that A181 has the same fabrication and testing requirements as does A105, which is specifically stated to be compatible for use in pressure systems at ambient and higher-temperature service conditions. A181 is only for "General Purpose Piping".
A105 covers standards for forged carbon steel piping components, that is, flanges, fittings, valves, and similar parts, for use in pressure systems at ambient and higher-temperature service conditions. Materials shall be subjected to heat treatment (annealing, normalizing, tempering, or quenching). Material shall conform to carbon, manganese, phosphorus, sulfur, silicon, copper, nickel, chromium, molybdenum and vanadium contents. The forgings shall be subjected to tension, hardness and hydrostatic tests, with the latter applicable when required. Material shall adhere to tensile strength, yield strength, elongation, reduction of area, and hardness requirements. Guidelines for retreatment, repair by welding, and product marking are given. Forging is Normalized.
Technology is stealing American jobs. Stop visas for robots.
RE: ASTM A105 vs ASTM A181/1 Flange
RE: ASTM A105 vs ASTM A181/1 Flange
Technology is stealing American jobs. Stop visas for robots.