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You are here: Home » Products » pipe fitting » Flange » Slip on flange » SORF ASTMA182 GR.F11 CLASS300 ANSI B16.5
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Weld neck pipe flanges are typically provided with a raised face, flat face, or RTJ face


Alloy steel Forged flange

ANSI B16.5, ASME B16.47,MSS-SP 44 big size flange

Size range: 1/2" to 80" DN15 to DN2000

Design: welding neck, slip on, blind, socket welding, threaded, lap-joint

Pressure: 150#, 300#, 600#,900#,1500#, 2500#

Pressure: PN6, PN10, PN16, PN25, PN40, PN64, PN100

Wall thickness for flange: STD, SCH40, SCH80, SCH160. SCHXXS

Material for flange: carbon steel A105, C22.8, S235, S235JR, P235GH stainless steel 304/304L, 316/316L

Alloy steel for high pressure flange: ASTMA182 F5, F1,F11, F9,F91 etc.

Coating: black paint, yellow transparent paint, cold and hot dip galvanize


DIN standard flange

Size range: DN15 to DN2000

Design: slip on flange DIN2573,2576,2502,2503, 2543,2545

             welding neck falnge DIN2631, 2632,2633,2634,2635

              blind flange DIN 2527 PN6, PN10, PN16, PN25, PN40

              threaded falnge DIN2565,2566,2567,2567

              loose flange DIN 2641,2642,2656,2673

Material: carbon steel ST37.2, stainless steel 1.4301, 1.4404

Coating: rust-proof oil, transparent paint, cold and hot galvanized.

The weld neck flange consists of a circular fitting with a protruding rim around the circumference which machined from a forging bar, these flanges are typically butt welded to a pipe. The rim has a series of drilled holes that permit the flange to be affixed to another flange with bolts. Such flanges are suitable for use in hostile environments that have extremes of temperature, pressure or other sources of stress.
Weld neck pipe flanges are typically provided with a raised face, flat face, or RTJ face. When a raised face is necessary for weld neck pipe flanges, the standard height is 1/16 inch for weld neck pipe flanges fewer than 400LB. For weld neck pipe flanges of 400LB and up, the standard weld neck pipe flange raised face height is 1/4 inch.

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