Carbon steel flange, the main material is carbon steel. Carbon steel flanges can be used with pipes for easily assembling and disassembling.

Carbon Steel materials for flanges: A105 steel, Q235B steel, A3 steel, 10# steel, 20# steel, 16Mn steel, 45# steel, Q345B steel

Standard 

Machinery Department standard: JB/T81-94, JB/T79.4-94, JB/T83-94
Chemical Department standard: HG20593-97 / HG20617-97
National Standard: GB/T9119-2010
Marine Standard: CB M1001-81
Sealing and Pad for flanges: CB M1002-81
Thermal Powder Standard: D-GD87-1101
National Building Standard: S02403
European Standard: EN14420-2
American Flange Standard: ANSI B 16.5

Pressure rating 

PN pressure rating(12 kinds): PN2.5;PN6;PN10;PN16;PN25;PN40;PN63;PN100;PN160;PN250;PN320;PN400

Class pressure rating(6 kinds): Class 150;Class 300;Class 600;Class 900;Class 1500;Class 2500

Carbon steel flanges are designed to have standard dimensions. Common world standards include ASA/ANSI/ASME (USA), PN/DIN (European), BS10 (British/Australian), and JIS/KS (Japanese/Korean).

Carbon steel flange faces are also made to standardiz dimensions and are typically "flat face", "raised face", "tongue and groove", or "ring joint" styles, although other obscure styles are possible.

Carbon steel flange designs: Weld neck flange (WN flange), slip-on flange(SO flange), lap joint flange(LJ flange), socket weld flange(SW flange), threaded flange(TH flange), blind flange(BL flange).

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