a) This Standard covers pressure–temperature
ratings, materials, dimensions, tolerances, marking, testing,
and methods of designating openings for pipe
flanges and flanged fittings. Included are
(1) flanges with rating class designations 150, 300,
400, 600, 900, and 1500 in sizes NPS 1⁄2 through NPS 24
and flanges with rating class designation 2500 in sizes
NPS 1⁄2 through NPS 12, with requirements given in both
metric and U.S. Customary units with diameter of bolts
and flange bolt holes expressed in inch units
(2) flanged fittings with rating class designation
150 and 300 in sizes NPS 1⁄2 through NPS 24, with requirements
given in both metric and U.S. Customary units
with diameter of bolts and flange bolt holes expressed
in inch units
(3) flanged fittings with rating class designation
400, 600, 900, and 1500 in sizes NPS 1⁄2 through NPS 24
and flanged fittings with rating class designation 2500
in sizes 1⁄2 through NPS 12 that are acknowledged in
Nonmandatory Appendix E in which only U.S.
Customary units are provided
(b) This Standard is limited to
(1) flanges and flanged fittings made from cast or
forged materials
(2) blind flanges and certain reducing flanges made
from cast, forged, or plate materials
Also included in this Standard are requirements and
recommendations regarding flange bolting, gaskets, and
استاندارد فلنجها و فیتینگهاASME B16-5 سال انتشار 2013