S9074-AR-GIB-010/278
Required examinations and tests
Welded Joint Type
Piping Class
Pipe Size. inches nps
VT 18
MT PT TEST 17
Pressure
RT
Root Later
Final Weld 16
Root Later
Final Weld 5
Final Weld 3
Extent 15
11
-
P-2
X
X
10/
2-1/2 and >
-
-
Butt
10/
Sockets fillets and other attachments
< 2-1/2
10/
-
-
-
-
X
X
All
X
-
-
-
10/
-
X
NOTE: X indicates that the test is required.
1.
This table does not apply to piping used in components or accessories covered - in sections 13. 14. and l5. which specifically list inspection requirements.
2.
Where new welds in piping intersect existing or older welds. the latter welds shall be inspected for a distance of 6 inches or a distance equal to 50 percent of the pipe size diameter, whichever is less. as measured from points of intersection. Acceptance criteria for the existing or older welds and adjacent base letal shall be the sare as that specified by MIL-STD-2035 for inadvertent radiography .
For the following applications or systems. MT or PT may be substituted for RT provided the inspection requirements of footnote 4 are met: 3.
(a)
Piping for gas turbine and diesel engine exhaust system, except that section in submarines between the inboard and outboard exhaust val ves which is subject to submergence pressure.
(b)
Incinerator up-takes.
(c)
Exhaust relief valve which dumps to the bilge or the atmosphere.
(d)
Trim and drain pump suction piping welds which are not in the reactor compartment.
For joints welded from one side only. MT/PT inspect the root pass. For double welded joints. MT/PT inspect the back chipped. gouged. ground. or machined root area prior to welding the second side. VT at 5X magnification may be substituted for MT/PT inspection except for boiler tube to drum joints and superheater tubes to header joints. Linear discontinuities shall be unacceptable. Root layer inspection may be deleted if the weld is given a 360 degree (or 100 percent) RT or UT inspection. Root layer inspection is not requi red for welds, such as bosses and replovable backing. where the root layer will be removed. 4.
Original 89
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