Pipe Flange

Introduction
Specification
Production Process for Pipe Flange: There are four different types of the production process for pipe flange which are forging, casting, cutting and rolling. Forging flange contains less carbon which allows a stronger anti-rust property. Compared with casting flange, forging flange has higher shear and tensile properties, good streamline, relatively compact organization, better mechanical properties. However, unproper forging process might lead to uneven appearance, solidification cracking phenomenon and higher production cost. While the advantages for the casting process is to allow more complex shape design with a relatively low cost. The cutting flange is a type of flange directly cut from steel plates which the maximum diameter is limited by the steel plates. Rolling flange is produced by rolled and welded by steel strips which is generally used for large diameter flanges. Overall, the forging process is the widely applied process for producing pipe flanges.
Application:
Carbon Steel: ASTM A105,ASTM A350 LF1,LF2,LF3,A36,ASTM A234 WPB
Stainless Steel: ASTM A182 F304/304L, 316/316L,316Ti,321,317L,310S
Duplex Stainless Steel: S31803(SAF2205),S32750(SAF2507),S31500(3RE60)
Specification: NPS from 1/2 to 24'', CLASS from 150 to 2500
Surface: Light Oil/Black Painting
Packing: Packed in Wood Cabins/ Wood Tray
Pipe Flange Standard and Technical Data:
- ASTM A105 is the standard specification for carbon steel forgings for piping applications. This specification covers forged carbon steel piping components for ambient and higher temperature service in pressure systems. Included are flanges, fittings, valves, and similar parts ordered either to dimensions specified by the purchaser or to dimensional standards.
- ASTM A182 is the standard specification for forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high temperature services. This specification covers forged low alloy and stainless steel piping components for use in pressure systems. Include are flanges, fittings, valves, and similar parts to specified dimensions or to dimensional standards.
- ASTM A234 WPB is the standard specification for piping fittings of wrought carbon steel and alloy steel for moderate and high temperature service.

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