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Weld Neck Flange

Short Description:

Size: ½” (15 NB) to 48″ (1200NB)
Type: Welding neckPressure ratings: 150#, 300#, 600#, 900#, 1500#, 2500#
Materials: Stainless Steel:
304/304L, 316/316L, 304H, 316H, 309, 310S, 317L, 321/321H, 347/347H, 904L, DUPLEX 2205 / SUPER DUPLEX 2507
Standards: SANSI B16.15, ANSI B16.47, MSS SP-44, API6A, API 17D, Manufacturer Standard etc.

Product Description


Manufacturing Technique

Product Display & Application

Product Tags

Welding Neck Flanges are easy to recognize at the long tapered hub, which goes gradually over to the wall thickness from a pipe or fitting.

The long tapered hub provides an important reinforcement for use in several applications involving high pressure, sub-zero and / or elevated temperatures. The smooth transition from flange thickness to pipe or fitting wall thickness effected by the taper is extremely beneficial, under conditions of repeated bending, caused by line expansion or other variable forces.

These flanges are bored to match the inside diameter of the mating pipe or fitting so there will be no restriction of product flow. This prevents turbulence at the joint and reduces erosion. They also provide excellent stress distribution through the tapered hub and are easily radiographed for flaw detection.

Details of Welding Neck flange


1.Weld Neck flange 2.Butt Weld 3.Pipe or Fitting

With a protruding rim around the circumference and the same SCH with pipe, weld neck flange can be welding connect with a stainless steel tubings straightly. Also there is a long type weld neck flange, it is unsuitable for pipes and is used in process plant.Hunan Great supply both regular type and long type welding neck flange for piping system and energy industries.

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  • Product: Weld Neck Flange
    Dimension Range: 1/2” to 48” (1200NB)
    Rates/SCH: 150#—2500#,API2000PSI-20000PSI
    Materials: ASTM A182 F304, F304L, F304/304L, F316, F316L,
    Standards: ANSI B16.15, ANSI B16.47, MSS SP-44, API6A, API 17D, Manufacturer Standard etc.
    Our Strength
    • Fast Delivery
    • Various Materials
    • Full set of swivel ring flange, including gaskets and bolts
    • Customized fabrication available
    • Package supplying of piping materials
    • Overlay process
    • Third party inspection available

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    Weld Neck Flange display

    Weld-neck flange is the most popular flange type for piping system, it is widely used for oil and gas, ship building, chemical engineering, LNG, offshore etc.

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