I. Flange Codes
Which code governs flanges for sizes up to 24″ with pressure ratings from 150# to 1500#?
Explanation: Flanges for sizes up to 24″ with pressure ratings from 150# to 1500# are governed by ASME B16.5.
II. Flange Sizes
For sizes above 60″, which code governs the design of flanges?
Explanation: For sizes above 60″, flange design follows AWWA C207.
III. Alternate Standards
When may flanges to ASME B16.47 SERIES ‘A’ or other standards be specified?
Explanation: Flanges to ASME B16.47 SERIES ‘A’ or other standards may be specified for mating with equipment or valve flanges with corresponding bolting.
IV. Finish Requirements
What is the maximum allowable finish (in microinches AARH) for stock flange faces?
Explanation: The maximum allowable finish for stock flange faces is 1000 μin AARH max.
V. Serrated Finish
What is the range of microinches AARH for serrated flange faces?
Explanation: Serrated flange faces have serrations with 125-250μ in AARH.
VI. Smooth Finish
What is the range of microinches AARH for smooth flange faces?
Explanation: Smooth flange faces have a range of 32 TO 63 μin AARH.
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