An Integrated Publishing, Inc. Site

An Integrated Publishing Website

MIL-DTL-17813 Expansion Joints, Pipe, Metallic Bellows, General Specification ForThis specification covers metallic bellows expansion joints used to absorb dimensional movement in piping systems. This movement may be caused by thermal expansion, contraction, or adjacent structural movements.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10

MIL-DTL-17813H

provided it meets the requirements of the specification and is representative of the design, construction,

and manufacturing technique applicable to the remaining items to be furnished under the contract.

4.5.1 First article inspection routine. One expansion joint shall be subjected to first article testing in

table I. The test sequence shall be determined by the manufacturer unless otherwise specified.

TABLE I. First article inspection.

Inspection

Requirement

Test method

Examination

Movement

Cyclic endurance

Deflection force

Expansion joint stability

Hydrostatic

4.5.2 Samples for first article. Unless otherwise specified, after award of the contract or order, the

manufacturer shall forward, from randomly selected samples, 3 expansion joints. The samples shall be

representative of the construction, workmanship, components, and materials to be used during

production. When a manufacturer is in continuous production of expansion joints from one contract to

another or has demonstrated within the past 2 years the capability to meet the requirements of this

specification, inspection of additional first article samples for a new contract may be waived at the

discretion of the acquiring activity (see 6.2). Approval of the first article samples or the waiving of first

article inspection does not preclude the requirements for performing conformance inspection. First article

samples shall be furnished to the Government as directed by the contracting officer (see 6.2).

4.5.3 Disposition of samples. First article samples shall be furnished to the Government as directed

by the contracting officer (see 6.2).

4.5.4 Failures. All samples must meet all of the contract requirements. Failure of a sample unit to

pass any test shall be cause for rejection of the entire lot and to grant first article approval.

4.6 Conformance inspection. For manufacturers that have successfully passed first article

inspections and are continuously producing expansion joints to this specification on going inspections

shall consist of both the examination of 4.7 and the sampling inspection of 4.6.2. If first article is waived

due to prior successful first article inspection the individual inspections shall be the manufacturer's in

house inspection procedures. The conformance inspection shall include the examination of 4.7 and the

tests of 4.8. This inspection shall be performed on the samples selected in accordance with 4.6.2.

4.6.1 Failure. Failure of an article sample to pass any of the inspections specified herein shall be

cause for the Government to refuse to accept further products until corrective action has been made and

successful completion of first article testing accomplished.

4.6.2 Sampling. The unit of product shall be one expansion joint. All expansion joints offered for

delivery at one time shall be considered a lot for the purpose of inspection. Every expansion joint shall be

examined as specified in 4.7 and undergo the hydrostatic test (see 4.8.1).

4.6.3 Lot records. Manufacturers shall keep lot records for 3 years minimum. Manufacturers shall

monitor for compliance to the prescribed procedures, and observe that satisfactory manufacturing

conditions and records on lots are maintained for these expansion joints. The records, including as a

minimum, an attributes summary of all quality conformance inspections conducted on each lot, shall be

available to review by customers at all times.