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pipe fittings Archives - Projectmaterials

Buttweld fittings ASME B16.9 (carbon, alloy), ASME B16.9/MSS-SP 43 (stainless and nickel alloys): definitions, materials, sizes and types (elbow, cap, reducer, cross, tee)

Buttweld Fittings in Piping (ASME B16.9)

Buttweld fittings are used to change the pathway of a pipeline (elbows), reduce/increase its bore size (reducers), branch (tees, cross) or blind it (butt weld cap). BW fittings are used for pipes above 2 inches in diameter, whereas socket weld and threaded fittings are used for smaller size pipes.

Buttweld Fittings Dimensions (Elbow, Reducer, Tee)

The ASME/ANSI B16.9 specification covers the dimensions and the tolerances of carbon and alloy butt weld fittings. The MSS-SP 43 specification integrates ASME B16.9 to cover stainless steel and nickel alloy pipe fittings. In this article, we show the dimensions and weights of buttweld elbows, tees, and reducers. BUTTWELD FITTINGS DIMENSIONS ASME B16.9 45/90 Deg…. read more »

Socket Weld and Threaded Fittings (ASME B16.11)

How to define forged fittings? The term “forged fittings” refers to two families of pipe fittings (socket weld and threaded) used for small bore pipes and piping systems (generally below 4 inches in diameter for Class 3000, and below 2 inches for fittings in class 6000 and 9000). These fittings are manufactured by forging and… read more »

Tube Compression Fittings (Double Ferrule)

Compression fittings are used to create leak-free tube connections easily and quickly. Double ferrule compression fittings feature an outer nut, two deformable ferrules in soft alloy or non-ferrous metals and, a tube fitting body and are available for metric and fractional tube sizes. When the fitting nut is screwed on the tube, the ferrules get deformed to… read more »

Stub End Benefits (ASA, MSS)

What is a stub end and why should it be used? Stub ends are buttweld fittings that can be used (in combination with a lap joint flange) alternatively to welding neck flanges to make flanged connections. The use of stub ends has two advantages: it can reduce the total cost of flanged joints for piping… read more »