ASME B16.34 - ASME B16.5 Flange Dimensions

Written on November 21, 2018 | Back to the overview

In ASME B16.34 section 6.2.2 it is dictated that flanged ends for valves shall be in accordance with ASME B16.5 requirements for flanges fittings.

For Class 150 it is clear that the minimum thickness of the flanges t_f is different for flanges (Table II-8) and flanged fittings (Table II-9).

For class 300 however the value t_f is not given for flanged fittings NPS ½ and ¾ (Table II-12).
VACTRA interpretation is therefor that for these sizes Table II-11 for flanges should be followed.
The ASME organization in New York confirms us that this interpretation is correct.