According to the connection type flange connection can be divided into plate type flat welding flange

The direction of the end of the stainless steel fitting must be protected to avoid flattening and deformation. According to the connection type, flange connection can be divided into plate type flat welding flange, flat neck welding method with neck to neck welding flange, socket welding flange threaded flange flange cover, butt welding ring with neck, loose sleeve flange, Flat, welding ring, loose sleeve flange, ring groove flange, flange cover, large diameter, flat method, blue, diameter, high neck flange blind plate pair, welding ring, loose sleeve flange waiting. In addition to carbon, carbon steel stamped elbows usually contain a small amount of silicon manganese. According to the application, carbon steel can be divided into carbon structural steel, carbon tool steel and free-cutting structural steel. Carbon structural steel is divided into three categories. The structure of structural steel and the mechanical structure of structural steel; according to the smelting system, it can be divided into open-hearth converter steel and electric furnace steel; according to the deoxidation system, it can be divided into boiling steel comfort steel, semi-comfort steel, and special comfort steel; carbon can be carbon steel. Carbon steel, medium carbon steel and high carbon steel; according to the content of phosphorus and sulfur, carbon steel can be divided into ordinary carbon steel, high quality carbon steel, high quality steel and high quality steel.

In recent years, with the universal application of heating systems, the national standard stamping elbow as a new generation of heating special pipes is gradually becoming the mainstream product in the heating market. In order to extend the service life of the tap and improve the quality of thread processing, the following points should be emphasized. Among them, the steel structure fell by 0.7 dd night, rebar and wire stocks fell by 559 and 1481, cold-rolled and gold-plated stocks fell by 541 and 161; hot rolled coil stocks increased by 189. In the four quality inspections of welded elbows, must Checking the elbow at the welding elbow is also an important measure to ensure the welding quality. The sealing surface of welded flange can be divided into three types: smooth, uneven, groove. Welded flange applications are most commonly used for medium premises, such as low-pressure non-purified compressed air low-pressure recirculation. Its interest is that the price is cheap. The advantages are mainly reflected in the following aspects: no need to use billet as raw material, which can save the cost of pipe manufacturing equipment and mold.