MSS SP-75 SPECIFICATION FOR HIGH-TEST, WROUGHT, BUTT-WELDING FITTINGS

MSS SP-75  covers factory-made, seamless and electric fusion-welded carbon and low-alloy steel, butt-welding fittings for use in high pressure gas and oil transmission and distribution systems, including pipelines, compressor stations, metering and regulating stations, and mains.

MSS SP-75 governs dimensions, tolerances, ratings, testing, materials, chemical and tensile properties, heat treatment, notch toughness properties, manufacture and marking for high-test, butt-welding fittings NF’S 60 and smaller. Dimensional requirements for NPS 14 and smaller are provided by reference to ASME B16.9.