INCH-POUND
MIL-DTL-18182F
4 December 2002
SUPERSEDING
MIL-U-18182E
29 MARCH 1991
DETAIL SPECIFICATION
UNION, PIPE, FORGED STEEL, THREADED, WATER-OIL-GAS
2
(2,000, 3,000, AND 6,000 LB/IN )
This specification is approved for use by all Departments
and Agencies of the Department of Defense.
1 SCOPE
1.1 Scope. This specification covers forged steel threaded pipe unions having ground joint union seats
adaptable for severe conditions.
1.2 Classification.
1.2.1 Class, style, size, and finish. The class, style, size, and surface finish of a union may be as follows:
1.2.1.1 Class.
2
Class 1 - 2,000 lb/in (cold non-shock water, oil, gas) available in styles A and B only.
2
Class 2 - 3,000 lb/in (cold non-shock water, oil, gas) available in styles A and B with UN and
ACME thread coupling nut.
2
Class 3 - 6,000 lb/in (cold non-shock water, oil, gas) available in style A only.
1.2.1.2 Style.
Style A - Ends, threaded female
Style B - Ends, threaded, one end male, other end female (classes 1 and 2 only)
1.2.1.3 Nominal sizes (inches). 0.125, 0.25, 0.375, 0.50, 0.75, 1.00, 1.25, 1.50, 2.00, 2.50, and 3.00.
1.2.1.4 Surface finish. The union may be coated or uncoated (see 3.13).
Beneficial comments (recommendations, additions, deletions) and any pertinent data that may be of use
in improving this document should be addressed to: Defense Logistics Agency, Defense Supply Center,
Columbus (DSCC-VAI), P.O. Box 3990, Columbus, OH 43216-5000, by using the Standardization
Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.
AMSC N/A
FSC 4730
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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