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ship itself. Therefore, valves have been designated as level I material and
special control procedures are invoked to ensure receipt of correct material.
4.7.1 Materials which form the pressure boundary valves shall be controlled
by the level I requirements specified in 4.7.1.1.
4.7.1.1 Quantitative chemical and physical analysis of material traceable
to heat identification shall be required for the following. Certification
documentation (see 6.2.2) shall include, in addition to the material specifi-
cation: class, form, condition, grade, type and composition, as applicable to
material supplied.
Valve body.
(a)
Valve bonnet.
(b)
The valve stem which penetrates the pressure boundary.
(c)
Metallic pressure boundary internal parts.
(d)
Threaded fasteners, 1/2 inch nominal and larger.
(e)
The following are specifically excluded for level I material
(f)
control requirements:
(1) Pressure seals, such as O-rings.
Questions regarding applicability of level I requirements
shall be referred to the Naval Sea Systems Command.
A statement of hydrostatic tests performed giving test
pressures.
4.8 Inspection of packaging. Sample packages and packs, and the
inspection of the preservation-packaging, packing and marking for shipment
and storage shall be in accordance with requirements of section 5 and the
documents specified therein.
PACKAGING
5.
(The preparation for delivery requirements specified herein apply only
for direct Government acquisition. For the extent of applicability of the
preparation for delivery requirements of referenced documents listed in section
2, see 6.4.)
5.1 Preservation-packaging, packing, and marking. valves shall be
individually preserved-packaged level A or C, packed level A, B, or C, as
specified (see 6.2.1), and marked in accordance with MIL-E-17555.
6.
NOTES
6.1 Intended use. The 2-inch auxiliary turbine trip valves covered
by this specification are intended for use in steam service.
6.2 Ordering data.
Acquisition documents should specify
6.2.1 Acquisition requirements.
the following:
(a) Title, number, and date of this specification,
(b) Rating required (see 1.2).
(c) When first article is required (see 3.1).
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