MIL-T-15301D(SHIPS)
(Continued)
Table II - Classification of defects.
4.2.1.1 Each tank shall be weighed. Any tank made to the same drawing which is unusually heavy or
light when compared with other tanks made to the same drawing shall not be offered for delivery.
4.2.2 Tests.
4.2.2.1 Hydrostatic test. Each tank shall be subjected to a hydrostatic test before galvanizing.
The hydrostatic test pressure shall equal twice the designed working pressure, and shall be held for a
period long enough to-allow a thorough inspection of the-tank and the-welded joint.
4.2.2.2 Each class 1 tank shall be subjected to 100 percent radiographic inspection in accordance
with MIL-STD-271.
4.2.2,3 Possible test failures, Possible test failures are defined as follows:
(a) Hydrostatic test (under specified hydrostatic test conditions):
(1) Evidence of distortion.
(2) Not free of leaks of seams, joints, connection pads.
(3) Tank not cleaned prior to galvanizing.
(b) Radiographic inspection (class 1 tanks only):
(1) Radiographs show evidence of cracks, non-fusion, slag inclusions, heavy porosity in
welds,
PREPARATION FOR DELIVERY
5*
(The preparation for delivery requirements specified herein apply only for direct Government pro-
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curements. Preparation for delivery requirements of referenced documents listed in section 2 do not apply
unless specifically stated in the contract or order. Preparation for delivery requirements for products
procured by contractors shall be specified in the individual order.)