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BS 3799:1974
Specification for steel pipe fittings, screwed and socket-welding for the petroleum industry (British Standard)
Forged carbon and alloy steel screwed and socket-welding fittings. Screw threads in accordance with API Std. 5B. Bore diameters of socket-welding fittings compatible with BS 3600 and BS 1600. Substantially agrees with ANSI B16.11, ASTM A 234 and ASTM A 403.
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British Standards Institution [bsi]
British Standards Institution [bsi]