MIL-DTL-2036E
APPENDIX A
A.4 QUALITY ASSURANCE PROVISIONS
A.4.1 Explosionproof design approval procedures. Each design of explosionproof equipment offered
under this specification requires approval by the procedures described herein. Explosionproof design
approval shall be obtained prior to the delivery of equipment of any new or modified design. Once the
design is approved as being explosionproof, identical equipment may be supplied on subsequent
contracts or orders without further explosionproof design approval.
A.4.1.1 Procedures for design approval based on testing. If explosionproof design approval based on
testing is sought, the following procedures shall apply:
(a)
Application for explosionproof design approval shall be submitted by the equipment manufacturer
to the Navy contracting activity for forwarding for approval to the command or activity responsible
for establishing technical requirements. (NAVSEA, Washington, DC 20362-5101 shall be the
approval activity for Naval shipboard electrical equipment.) The following information shall be
furnished with the application:
(1)
Name of Government contracting activity and contract number.
(2)
Name of prime contractor, prime contractor's purchase order number, and identification of
equipment being supplied by prime contractor.
(3)
Two prints of all drawings for the explosionproof equipment.
(4)
Statement by applicant that the equipment is constructed in accordance with MIL-DTL-2036.
(5)
If any wall thickness is less than the recommended minimum (see A.3.2.1), the explosion
pressure that enclosure is designed to withstand, safety factors applied, and method of
determining enclosure strength (including design strength calculations or hydrostatic test
results) shall be specified.
(6)
Explosionproof testing activity.
(7)
Explosionproof test method (reference to a recognized explosionproof test method, that is
method 511, procedure II, of MIL-STD-810, or applicable design tests for enclosures specified
in NEMA 250).
(8)
Two copies of explosionproof test report.
(b)
One copy of explosionproof test report shall be submitted to the NAVSEA for information,
with a cover letter including the information specified in A.4.1.1(a) (1) through approval activity
shall also be furnished. The applicant shall be responsible for all arrangements for testing and all
testing expenses.
(c)
The Navy approval activity will approve or disapprove the design as explosionproof in a letter to
the applicant via the Navy contracting activity.
A.4.2 Explosionproof tests. Tests for explosionproofness shall be conducted using an approved test
method after the applicant has certified that all other equipment tests (including shock and vibration tests)
have been completed. Equipment shall not be repaired during the interval between shock tests and
explosionproof tests.
A.4.3 Hydrostatic test. When the hydrostatic test is required (see A.3.2.1), the pressure shall be applied
2
at a rate of 100 pounds force feet per square inch (lbf/in ) until the required internal pressure is reached
and it shall be held to this pressure for 1 minute.
A.4.4 Reconditioning of test sample. If equipment which has satisfactorily passed these tests is to be
applied on a contract or order, the manufacturer shall repair all the tapped openings which were required
for test purposes and clean the inside of the enclosures as necessary. This reconditioning shall be
accomplished before the equipment is offered for final inspection. Acceptable methods of plugging the
test openings are as follows:
(a)
Using a solid threaded plug, insert plug with a minimum of either full thread engagement for the
thickness of the enclosure material or five full threads.
(b) Secure plug against loosening by:
(1) Tack welding.
23
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business