Carbon steel elbow has poor rigidity and is suitable for occasions with pressure p≤4MPa; GB carbon steel elbow has greater rigidity and is suitable for occasions with high pressure and temperature. The basic process of carbon steel elbow forming technology is: First, weld a polygonal ring shell with a polygonal cross-section or a polygonal fan-shaped shell with closed ends. After the interior is filled with a pressure medium, an internal pressure is applied, and the horizontal The cross section gradually changes from a polygon to a circle, and eventually becomes a circular ring shell. There are three types of flange sealing surface: flat sealing surface, suitable for occasions with low pressure and non-toxic medium; concave and convex sealing surface, suitable for occasions with slightly higher pressure.
Carbon steel elbow technology is applicable to any carbon steel elbow with working pressure less than 10MPa, inner diameter of carbon steel elbow d? 125mm, ratio of middle diameter D of carbon steel elbow to inner diameter d of carbon steel elbow D / d? 1.5, and The diameter of the carbon steel elbow is not limited. For example, it is possible to process large national standard carbon steel elbows with an inner diameter of 12m for carbon steel elbows and an intermediate diameter of 60m or more for carbon steel elbows. National standard carbon steel elbow piping system for petroleum, natural gas, chemical, hydropower, construction and boiler industries. The tongue and groove sealing surface is suitable for flammable, explosive, toxic media and high pressure occasions. A gasket is a ring made of a material that can produce plastic deformation and has a certain strength.
Carbon steel elbow is resistant to temperature and pressure, good flexibility and heat resistance, and its performance is higher than other plastic pipes. Easy installation, good thermal conductivity, suitable for floor heating system, recyclable. The stamped elbow pipe has its excellent impact strength, can be hot-melt welded and mechanically connected, and has better thermal conductivity than PB-PP-R. Long-term pressure resistance, from the perspective of design stress only, the national standard stamping elbow has the best pressure resistance. However, due to various factors, the actual wall thickness of the floor heating pipe is usually 2mm. Under this wall thickness, all kinds of pipes can meet the requirements of floor heating, and the pressure-resistant advantages of the national standard stamped elbow pipes cannot be reflected.
Carbon steel elbow In terms of design stress, the pressure resistance of stamped elbow is the best. However, due to various factors, the actual wall thickness of the floor heating pipe is usually and under this wall thickness, all kinds of pipes can meet the requirements of floor heating. The pressure resistance advantage of the national standard carbon steel elbow pipe cannot be reflected; thermal conductivity: Pipes used for floor heating need to have good thermal conductivity and low temperature thermal shock resistance.
There are many types of stamping elbow materials and a wide range of applications. It is forming a large-scale high-tech industry group, which has a very broad market prospect and extremely important strategic significance. High-pressure elbow materials are classified according to different classification standards and can be divided into different types. Since we have regarded electronic information materials as a new class of materials, the new wear-resistant materials referred to here are mainly Wear-resistant materials. The material used for carbon steel elbows is a large class of new materials with special electrical, acoustic, thermal, mechanical, chemical, and biological functions. It is an important basic material for high-tech fields such as biotechnology and energy technology and national defense construction. The transformation of certain traditional industries, such as agriculture, chemicals, and building materials, plays an important role. The material of the carbon steel elbow is special, showing different use values in a certain field, and affecting the development of other industries to a certain extent.
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Hales H.//SMC Editor