ASME B31.3 code clarification
ASME B31.3 code clarification
(OP)
Under the B31.3 requirements for Severe Cyclic Conditions, what percentage of socket welds that have not been tested by radiography or UT must be tested by the MT or PT methods?
Under the B31.3 requirements for Elevated Temperature Fluid Service, what percentage of socket welds in P-No. 4 and P-No. 5 materials that have not been tested by radiography must be tested by the MT or PT methods?
I have looked at 341.4.3 & 341.4.4 and do not see a definitive answer. Thanks in advance!
Under the B31.3 requirements for Elevated Temperature Fluid Service, what percentage of socket welds in P-No. 4 and P-No. 5 materials that have not been tested by radiography must be tested by the MT or PT methods?
I have looked at 341.4.3 & 341.4.4 and do not see a definitive answer. Thanks in advance!





RE: ASME B31.3 code clarification
(b) Other Examination. All circumferential butt and
miter groovewelds and all fabricated branch connection
welds comparable to those shown in Fig. 328.5.4E shall
be examined by 100% radiography in accordance with
para. 344.5, or (if specified in the engineering design)
by 100% ultrasonic examination in accordance with para.
344.6. Socket welds and branch connection welds which
are not radiographed shall be examined by magnetic
particle or liquid penetrant methods in accordance with
para. 344.3 or 344.4
See 341.4.4
(b) Additional Examination. The examination requirements
of para. 341.4.1(b) apply with the following exceptions:
(1) Fabrication for longitudinal welds in P-No. 4
and P-No. 5 materials, except those in components made
in accordance with a listed specification, shall be examined
by 100% radiography in accordance with para.
344.5, or by 100% ultrasonic examination in accordance
with para. 344.6.
(2) Socket welds and branch connection welds in
P-No. 4 and P-No. 5 materials that are not radiographed
or ultrasonically examined shall be examined by magnetic
particle or liquid penetrant methods in accordance
with para. 344.3 or 344.4.
RE: ASME B31.3 code clarification
RE: ASME B31.3 code clarification
Yes, 100% is required,
Regards,
Kiwi
RE: ASME B31.3 code clarification