B7M Versus B7 Bolting
B7M Versus B7 Bolting
(OP)
Is there any impact on the pressure rating of a flange with utilization of B7M bolts versus B7 bolts?
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RE: B7M Versus B7 Bolting
the Grade B7 bolting material has a higher allowable stress value (up to 5 Ksi difference) up until 800 deg F, beyond this temperature both Grades have similar stress values.
Ref – ASME B&PV Code, Section II, Part D, Table 3
RE: B7M Versus B7 Bolting
RE: B7M Versus B7 Bolting
RE: B7M Versus B7 Bolting
RE: B7M Versus B7 Bolting
RE: B7M Versus B7 Bolting
RE: B7M Versus B7 Bolting
RE: B7M Versus B7 Bolting
RE: B7M Versus B7 Bolting
B7M bolting is specified above B7 if applied in piping subject to Sour Service (NACE MR0175) if the piping is insulated. It's a modified grade.
Regards,
FKE
RE: B7M Versus B7 Bolting