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BS 1640-4
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BS 1640-4 1968 Edition, March 21, 1968 Steel Butt-Welding Pipe Fittings for the Petroleum Industry Part 4: Wrought and Cast Austenitic Chromium-Nickel Steel Fittings
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Description / Abstract:
Dimensions and tolerances, materials, methods of manufacture, pressure/temperature ratings, marking, inspection, tests for seamless and fabricated fittings: 45° long radius elbows, 90° long and short radius elbows, 90° long radius tangent elbows, long and short radius return bends, equal and reducing tees, concentric and eccentric reducers, caps and lap-joint stub ends, of sizes 19 mm to 609.5 mm. Welding-neck flanges not included.