The difference between the welding flange and flat welding flange

The butt welding flange is actually the interface end and the pipe to be welded,whether it is the size of the pipe diameter or the wall thickness of the pipe,it must be completely consistent,that is,the direct welding of the two pipes.The interface of the flat welding flange is different from the butt welding flange.The interface of the flat welding flange is generally processed with a concave table that is a little larger than the outer diameter of the pipe to be connected.When welding with the pipe, it is required. Insert the tube inside for soldering.

ANSI B16.5 ASTM A105N RTJ weld neck flanges

ANSI B16.5 ASTM A105N RTJ weld neck flanges

From the point of view of the welding process,the welding performance of the welding flange is better than that of the flat welding,and the corrosion of the welding flange is relatively small. However, the welding installation process of the welding flange is more complicated, and it is necessary to weld both sides of the flange. The flat welding flange only needs to be welded on one side. But it is not absolute, but from the overall understanding, flat welding is much simpler than butt welding.

From the point of view of use, there are many flat welding flanges in low and medium pressure pipelines, and many welding flanges are used in the connection of medium and high pressure pipelines. Under high pressure, welding with a butt flange is mainly to reduce stress concentration. From the point of view of the installation cost of the flange, it is of course complicated and higher. When the welding flange is installed, it is higher than the flat welding flange in terms of cost and auxiliary materials.

Stainless steel SS316 weld neck flanges and slip on flanges

Stainless steel SS316 weld neck flanges and slip on flanges

Haihao Group manufacture forged flanges more than 30 years,our products contain:weld neck flange,slip on flange,blind flange,threaded flange,plate flange(plain flange),spectacle blind flange,orifice flange,socket weld flange,lap joint flange(loose flange),long weld neck flange,reducing flange,rolled forging ring flange,flange olet,tube sheet,anchor flange,non standard flange(custom flange).

Forged flanges materials:

Carbon steel:ASTM A105,A350 LF2,SS400,P235GH,P250GH,C22.8,Q235,20#,16Mn.

Stainless steel:ASTM A182 F304,F304L,F316,F316L,F321,F347,F310,F44,F51 etc.

Alloy steel:ASTM A694 F42,F46,F52,F56,F60,F65,F70,A182 F5,F9,F91,F12,F11,F22 etc.

If you want to know more about our products,please email us:sales@haihaogroup.com

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