carbon steel forged large radius flange

4) flange sealing surface: flat face,rised face,female and male surface, Mortise face, ring joint face

g, surfacing / Cover Flange

f, Anchor Flange

e, rotating flange

d, flange cover (blind hole flange)

c,slip on welding flange ,slip on butt welding flange,flat welding slip on flange ,blind flange

With neck flat welding flange ,Socket welding Flange ,blind flange

In the GB standards, subordinate to the European system of nominal pressure class , maximum NP of flange is 4Mpa, subordinate to the Inter-American system of nominal pressure class, flange maximum NP of flange is 42Mpa.

Among the series,PN0.25, PN0.6, PN1.0, PN1.6, PN2.5, PN4.0, a total of six levels of flange size belonged to European flange systerm, represented by Germany,and the rest belonged to Inter-American flange system, represented by American

b, Series 2: PN0.25, PN0.6, PN2.5, PN4.0

a, Series 1: PN1.0, PN1.6, PN2.0, PN5.0, PN10.0, PN15.0, PN25.0, PN42 (main series)

1) Nominal pressure: 0.25Mpa ~ 42.0Mpa

3, China Steel Pipe Flanges national standards GB

3) *** JIS pipe flanges: In the petroleum chemical equipment ,generally used only for public works in the international community has little effect in the international community and it did not form independent system.

d, flange sealing surface: flat face, rised surface,female and male face,Tenon slot surface, metal ring connections surface

c, flange structure type: Article welding, socket welding, threaded connections, loose tube, welded and flanged lid

b, the public operator Diameter: 6 ~ 4000mm

a, nominal pressure: 150psi (2.0Mpa), 300psi (5.0Mpa), 400psi (6.8Mpa), 600psi (10.0Mpa), 900psi (15.0Mpa), 1500psi (25.0Mpa), 2500psi (42.0Mpa),

2) Inter-American Flange System: U.S. ANSI B16.5 "Pipe Flanges and Flange Steel pipe fittings" ANSI B16.47A / B "large-diameter steel flange" B16.36 Orifice Flanges B16.48 Eight Characters France Lan, etc..

e, the Soviet Union in 1980 with the release of OCT pipe flange standards recorded with the German DIN standard is similar

d, flange sealing surface are: flat face, rised face, male and female face, Tenon slot surface, rubber-ring joint face, lens surface and patch weld surface

c, the structure of flange types: flat plate welding, slip on flat-welding, curling slip on welding, slip on butt welding, welded type, with neck threaded connection type, the overall style and flange cover

b, the public operator Diameter: 15 ~ 4000mm (the largest diameter flange with the selected specifications and flange surface pressure at a different level there is a corresponding change)

a, nominal pressure: 0.1, 0.25, 0.6, 1.0, 1.6, 2.5, 4.0, 6.4, 10.0, 16.0, 25.0, 32.0, 40.0, Mpa

1) The European flange system: German DIN (including the Soviet Union), the British Standard BS Standard NF France Italian standard UNI

2, the international several system of pipe flange standards

1, flange connection or flange joint, refers to flanges, gaskets and bolts, as a group of three interconnected combination of the structure can be sealed off connections.

International several system of pipe flange standards  

Flange is easy to use, able to withstand greater pressure. In the industrial pipeline,flange connection is widely used. In the family use, pipe diameter is small, but also low-pressure, flange connection is invisible. If youi are in a boiler room or a production site, full of flanged pipes and equipment.

Flange connection is to connect two pipes, fittings or equipment,first fix on a flange plate,fixed together with flange pad between two flanges , fastened together with bolts and completed connection. Some of pipe fittings and equipment have been built-flange, also falls within the flange connection. Flange connection is an important connection in pipeline construction.

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