Home > Steel Industry > Content
What are flanges
Oct 12, 2016

Pipe steel flange is forged of steel designed to connect sections of pipeline.Flanges are joined to each other by bolting and joined to the pipe system by welding or threading.


The type of flange are: welding neck flange,slip on flange,threaded/screwed flange,socket weld flange, lap joint flange ,orifice flange,flat flange,integral flange,etc.


 Flanges are designed to the following pressure rating:

1.  75LB, 125LB, 150LB, 300LB, 400LB, 600LB, 900LB, 1500LB, 2500LB;

2.  5K, 10K, 16K, 20K, 30K

3.  PN2.5, PN6, PN10, PN16, PN25, PN40, PN64, PN80, PN100, PN250, PN320, PN400


 The sealing face of flange is:

1.RF:Raise face

2.FF:Flat face

3.RTJ:Ring type joint


The standard of flange:

1.ANSI B16.5 Flange- steel pipe flange and flange fittings(1/2 inch to 24 inch nominal diamete)

2.ASME B16.47 Series B (API 605) Flanges

3.ASME B16.47 Series A(MS SPP44)Flanges

4.EN1092-1 FLANGE





Appliance Area

Chemical processing, transport and storage, Oil and Gas exploration and processing equipment, Marine and other high chloride environments, Pulp and paper digesters, liquor tanks and paper machines.