HG Chemical Department flange

HG flange belongs to the standard system of chemical flanges, and is one of the manifestations of HG flange. It is widely used in domestic chemical equipment or fluid pipelines. The application standard system for pressure pipelines in the chemical industry is also a relatively complete standard system, and has undergone several years of production practice and testing, with mature usage experience. Due to its dual series of large and small outer diameters, as well as European and American flanges, it has a wide range of applications. It can be used in conjunction with international standards such as ANSI, DIN, and ISO, as well as domestic standards such as GB, SH, and JB

Application System Standards for Flanges of the Ministry of Chemical Industry: Includes both European and American Flanges

① European Flanges: (HG20592-HG20605)

Pressure Grades: 10 grades including PN 0.25, 0.6, 1.0, 1.6, 2.5, 4.0, 6.3, 10.0, 16.0, 25.0

Nominal Diameter: DN10~DN2000mm

Flange Types: Plate Flat Welded Flanges, Neck Flat Welded Flanges, Neck Welded Flanges, Integral Flanges, Socket Welded Flanges, Threaded Flanges, Welding Ring Loose Flanges, Flat Welded Ring Loose Flanges, Flange Cover Blind Plates, Lining Flanges, etc.

Sealing surface types: protruding surface, concave convex surface, mortise and tenon groove surface, ring connection surface, full flat surface, etc

Note: It can be used in conjunction with JB valves

② American flange standard (HG20615-HG20626)

Nominal pressure: PN2.0, PN5.0, PN11.0, PN15.0, PN26.0, and PN42.0 6 pressure levels

Nominal diameter: DN15~DN1500

Flange types: neck flat welding flange, neck butt welding flange, integral flange, socket welding flange, threaded flange, loose flange, etc.

Sealing surface types: protruding surface, concave convex surface, tenon groove surface, ring connection surface, full flat surface, etc

③ Common Execution Standards for Flanges in the Chemical Industry:

HG20592~20605 Steel Pipe Flanges (European System)

HG20615~20626 Steel Pipe Flanges (American System)

HG20606~20612 Gaskets for Steel Pipe Flanges (European System)

HG20627~20633 Gaskets for Steel Pipe Flanges (American System)