S9074-AR-GIB-010/278 INSPECTION REQUIREMENTS
10.1 General. This section contains the minimum requirements for inspection of welded joints in machinery, piping, and pressure vessels. This section is not applicable to components listed in sections 12, 13, 14, and 15. 10.2 Performing NDT shall be performed in accordance with MIL-STD-27l. When RT is specified and the geometry of the part or weld is such that RT is not technically practical, an alternate inspection system shall be approved by NAVSEA. Where MT or PT inspection methods are applied, both root (backside when accessible) and finished weld surface shall be so inspected. Pneumatic testing may be used in lieu of hydrostatic testing (for pressure test) for pneumatic systems.
10.3 Extent of inspection and methods.
TABLE VIII. Class M machinery inspectlon requirements..
Required examinations and tests
Machinery class
Category Welded joint type
VT 7
MT/PT test 6
RT 4
Root layer
Final weld
Root layer
Final weld
Final weld
Extent
Butts All others All
X X
X 1 X 1
X 2 X 2
X
100 %
-
A
-
3
-
M-1
-
X 1
B
X 2
-
3
X
X
-
3
-
-
C
All
X
X 1
3
-
-
X 2
A
All
X
M-2
B
All
-
X
-
-
X 1 X 2, 5
-
X
C
All
-
3
-
-
NOTE: X indicates that the test is required.
1.) For joints welded from side only, MT/PT inspect the root pass. For double welded joints, MT/PT inspect the backchipped, gouged, ground, or machined root area prior to welding the second side. VT at 5X magnification may be substituted for MT/PT inspection. 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.
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