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GOST 12821 PN4.0 Weld neck flanges

PIC-(GOST 12821 PN4.0 Weld neck flanges)
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  This steel weld neck flanges is circumferentially welded into the system at its neck which means that the integrity of the butt welded area can be easily examined by radiography. The bores of both pipe and flange match, which reduces turbulence and erosion inside the pipeline. The weld neck is therefore favoured in critical applications. The various types of steel weld neck flanges are:

  Weld Neck Flat Face Flanges

  Raised Face Weld Neck Flanges

  Stainless Steel

  ASTM A 182, A 240

  Grade

  F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L, Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750

  Carbon Steel

  ASTM A 105, ASTM A 181

  Alloy Steel

  ASTM A 182, GR F1, F11, F22, F5, F9, F91

  Nickel Alloys

  Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22,C276

  Copper Alloys

  Copper, Brass & Gunmetal

  Size

  1/8" NB TO 48"NB.

  Class

  150#, 300#,400 #,600#,900#, 1500# & 2500 #.

  Standard

  ANSI

  ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48

  DIN

  DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673


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