Forged carbon steel raised face Slip-On Flanges
We produce forged carbon steel raised face slip-on flanges for almost 37 years. This kind of flange is the most popular flange. We also manufacture other types, such as welding neck flange, flat flange, ring flange, socket flange, threaded flange and blind flange.
The difference between forged carbon steel raised face slip-on flanges and welding neck flange:
1.The weld form is different: the welding seam can not be radiographic inspection, and welding of the weld. The welded weld seam of the flange and pipe with neck butt welding is the fillet weld, and the weld seam of the neck butt welding flange and the pipe is the ring weld, and the butt weld is a two fillet weld, and the weld is a docking ring seam. The difference between the flat flange and forged carbon steel raised face slip-on flanges is that the forged carbon steel raised face slip-on flanges is more than one place in the pipeline welding area than the flat flange. Without the neck flat welding flange is flat, no flange of the convex platform is also the angle weld.
The weld with welding neck flange and nozzle is a type B seam, and weld seam with forged carbon steel raised face slip-on flanges and nozzle connection is a C type seam, which is not the same as nondestructive testing after welding.
2.The nominal pressure is different: with the forged carbon steel raised face slip-on flanges called pressure: 0.6---4.0MPa, and with the welding neck flange called pressure: 1--25mpa grade, obviously, with the neck flat welding flange of the pressure grade lower.
3.Different connection methods: with the forged carbon steel raised face slip-on flanges and welding neck flange is the largest difference in the structure of the receiver and flanged connection, with the neck flat welding flange is generally take over and flange angle, and with neck butt welding flange is flange and nozzle docking.
Forged carbon steel raised face slip-on flanges can only be connected with the pipeline, but not directly with the welded pipe parts, welding flange can be generally with all the welded pipe parts (including elbow, tee, reducer, etc.) directly connected, of course, including pipelines.
The stiffness of the welding neck flange is greater than that of the flat welded flange with neck, and the Bipping welding strength is high and it is not easy to leak. The neck-welded flange and neck-welded flange cannot be replaced casually, in terms of manufacturing angle with neck flat weld flange (so is slip on abbreviation) inside through large, means the weight is small, the cost is low, another nominal diameter greater than 250mm neck butt welding Flange (WN is welding neck abbreviation) to detect, So the flange does not need to be tested, so the cost is relatively low.