Inspection of stainless steel butt welding flange before leaving factory
I believe that we are not strange to pipe fittings, more or less will know a little, its quality is good or bad, determines the size of its role and the length of use
So let's briefly describe the stainless steel butt welding flange in the pipe fitting. Speaking of the flange, it is not strange, which can be divided into stainless steel butt welding flange, so before leaving the factory, what should be tested to determine the factory qualification standard? Let's take a look at it together
Inspection of stainless steel butt welding flange before leaving factory
The stainless steel butt welding flange must be according to the ultrasonic detection, the detection should not be layered defects. To the rolling Angle the steel will be cut into long strips, according to the rolling process will be welded into a circular ring
In addition, we should also make the steel surface to produce a ring cylinder surface, and can not use steel plate material to carry out mechanical processing into the butt welding flange with the neck.
Stainless steel butt welding flange is in use, to make it firmer, the use of two flanges, plus a gasket in the middle, with bolts stable, not the same pressure flange has different thicknesses and use of different bolts, water circulation pump and pneumatic valve, and pipe connection, this kind of equipment local, also make the corresponding flange shape, also known as flange connection
The welding seam depth of the stainless steel butt welding flange is related to the welding current, and also related to the thermal conductivity and capacity heat capacity of the material. The greater the relative density of the material or the liquid viscosity, the more inconvenient the elimination of the arc on the liquid molten pool metal, and the lighter the depth.
The thickness of the stainless steel butt welding flange harms the transmission of heat energy in the internal structure of the butt welding flange. When other things are the same, the thickness of the weldment is increased, the heat dissipation is expanded, and the width and depth of melting are reduced.
The casting process of stainless steel butt welding flange
usually consists of several processes, that is, the selection of high-quality steel blanking, heating, extrusion forming, and cooling after forging.
The process of forging includes free forging die forging, and membrane forging. Production and processing, according to the quality of the forging product, the number of production, and processing batch selection of different forging methods.
