Carbon steel flange, that is, flange plate or end flange connector made of carbon steel. The flanges made of carbon steel are called carbon steel flanges. Common materials are cast carbon steel grades WCB, forging A105, or Q235B, A3, 10 #, 20 #, 16Mn, 45 #, Q345B, etc.

Generally, the purpose is to prevent the surface of the flange from rusting by electroplating (yellow zinc, white zinc, etc.), or brushing antirust oil and spraying antirust paint.

Standard of Ministry of Machinery JB/T81-94

JB/T79.4-94

JB/T83-94

Standard of the Ministry of Chemical Industry HG20593 － 97/HG20617-97

National standard GB/T9119-2010

Marine standard CB M1001-81

CB M1002-81 flange sealing surface and gasket

Thermal power standard D-GD87-1101

National Building Standard S02403

European standard EN14420-2

Yellow zinc plated carbon steel flange

Yellow zinc plated carbon steel flange

American Flange Drilling Standard ANSI B 16.5

PN is marked with 12 pressure classes

Respectively: PN2.5; PN6; PN10; PN16; PN25; PN40; PN63; PN100; PN160; PN250; PN320; PN400

Class is marked with 6 pressure classes

They are: Class 150; Class 300; Class 600; Class 900; Class 1500; Class 2500

Carbon steel flange is tight and reliable. It has two sealing surfaces, and the sealing surface materials of the ball valve are widely used in various plastics, with good sealing performance and complete sealing. Carbon steel flange can be used in medium with suspended solid particles due to its wiping property during opening and closing. Model Q41F-16C Q41F-25C American standard A105 is about 0.9% (the standard is 1.05Max can reach 1.65% Max with the carbon content decreasing), while the national standard 16Mn content is about 1.3% (the standard is 1.2% ～ 1.6%), and the Japanese standard S25C is less than 0.6%.

The production processes include forging, casting, medium plate rolling, medium plate cutting, etc.