Manufacturing process of 180 degree elbow

　　Elbow connects two pipes with the same nominal diameter to make the pipe turn 90 degrees. 90 ° alloy steel elbow is based on this principle

　　1. Carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon, PPC, etc

　　2. According to manufacturing standard, it can be divided into national standard, electric standard, water standard, American Standard, German standard, Japanese standard, Russian standard, etc

　　3. According to the manufacturing method, it can be divided into pushing, pressing, forging, casting, etc

　　Alloy elbows are widely used. Common alloy elbows made of bronze are common in common water pipes. However, with the improvement of living standards, many water pipes use stainless steel elbows. Alloy elbows made of manganese steel are usually used in concrete pipes because of their excellent properties of bearing impact, extrusion and material wear, The high manganese steel alloy elbow is used in the pipeline with strong fluid flow and strong impact; the nickel steel alloy elbow is usually used in the pipeline with high concentration of oxidizing acid (nitric acid, sulfuric acid) at room temperature, but it will be seriously corroded in the pipeline with reducing acid, unless the concentration of hydrochloric acid is very low; Martensitic alloy elbow has high high temperature strength, oxidation resistance and steam corrosion resistance under 650 ℃, but poor weldability. Therefore, it is often used in high temperature steam pipeline and water gas pipeline.