Flange chemical industry application standard system

2019-03-11 15:41:10 5

Common standards for flanges in the chemical industry application standard system

HG20592~20605 Steel pipe flange (European system)

HG20615~20626 Steel Pipe Flange (American System)

HG20606~20612 Gas Pipe Flange Gasket (European System)

HG20627~20633 Gas Pipe Flange Gasket (American System)

HG20613 Steel Pipe Flange Fasteners (European System)

HG20634 Steel Tube Stainless Steel Flange Fastener (American System)

HG/T21631 steel seamed butt welded pipe fittings

HG/T21632 forged steel socket weld, threaded and butt welded pipe

HG/T21637 chemical pipeline filter

HG20537.1 Austenitic stainless steel welded steel pipe selection regulations

HG20553 Seamless and welded steel pipe size selection for chemical piping

HG/T21634 forged steel pipe fittings

HG/T21635 carbon steel, low alloy steel seam welded butt welded pipe fittings

HG/T21577 Quick Special Connector


Flange standard includes both European and American flanges

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: DN15~1500

Flange type: 6 types with neck flat welding, neck butt welding, integral flange, socket welding, thread, loose sleeve, etc.

Sealing surface type: 5 types of protruding surface, concave surface, groove surface, ring connection surface, and full surface.

The chemical industry pressure pipe application standard system is also a relatively complete standard system, and has undergone several years of production practice testing, with mature experience. Because it has two series of "large outer diameter series" and "small outer diameter series", "European flange" and "American flange", it is widely used, it can be used with foreign ANSI, DIN, ISO and other standards can be used together with domestic GB, SH, JB and other standards.

European flange: (HG20592 ~ HG20605)

Pressure rating: PN 0.25, 0.6, 1.0, 1.6, 2.5, 4.0, 6.3, 10.0, 16.0, 25.0, etc. 10 levels

Nominal diameter: DN10~DN2000mm

Flange type: plate type flat welding, neck flat welding, neck butt welding, integral type, socket welding, thread, butt welding ring loose sleeve, flat welding ring loose sleeve, flange cover, lining flange, etc.

Sealing surface type: five types: protruding surface, concave surface, groove surface, ring connection surface, and full surface