The post weld heat treatment of welded carbon steel flanges should be carried out and subjected to% or radiographic ultrasonic testing, and meet the requirements of Class II for radiographic testing JB and Class I for ultrasonic testing JB.
Suitable for connecting flange connections from large-diameter tubular components, socket type pipe joint components extend and shorten stainless steel flanges to prevent movement during thermal expansion and contraction of the insertion tube. Welding flanges are used in pipelines or high temperature, low temperature, and high pressure pipes, for transporting expensive, flammable, and explosive media such as pressure or temperature fluctuations in pipelines. It is used for transporting water, gases, usually low-pressure fluids, air, oil, and steam heating, and welding steel pipes for other purposes. When the valve stem is only used for opening and closing events without lifting operations, the valve stem packing is not easily damaged and the seal is reliable.? Grams per cubic centimeter. They usually limit the pressure drop. What are the predetermined conditions and standards for the use of asbestos rubber sheets in Japan's petroleum industry, which are flammable and toxic gases? ℃，≤. What are water, air, and steam in MPa? ℃，≤. MPa。 The main purpose is to reduce the deformation of metal flanges during hot forging, thereby reducing the deformation of materials with poor forging pressure and greatly reducing the tonnage of forging equipment; Changing the flange casting structure of the ingot, recrystallization occurs during the hot forging process of forming a new microstructure through the fine grains in the coarse cast state, and reducing defects in the casting structure to improve the mechanical properties of the steel;
American standard flange forging low-temperature cold heading, with small size changes for the flange.
The method of cold drawn (rolled) seamless steel pipe rolling is superior to hot rolled (seamless extruded component) composite. The diameter of any carbon steel elbow and elbow size limit. In addition, pipes and elbows should also be considered. Stamping elbow standard/inch, a professional commodity applied to pipeline equipment and facilities in the entire petroleum, chemical, smelting, power and other industries, as well as other auxiliary effects.