Alloy elbow is a general term for many kinds of elbows, which is used to connect two pipes with the same nominal diameter and make the pipes turn 90 or other angles. Its materials are diverse, and alloy elbows are widely used. Ordinary bronze alloy elbows are common in general tap water pipelines, but with the improvement of living standards, many tap water pipelines are changed into stainless steel elbow alloy elbows, which are mainly used as connecting fittings in pipeline installation and used to connect pipeline elbows. Connect two pipes with the same nominal diameter and rotate the pipes by 90 or other angles. Alloy elbow is a general term for all kinds of elbows, which are made of various materials, such as carbon steel, manganese steel and nickel steel. Alloy elbows are widely used. Alloy elbows are widely used. Ordinary bronze alloy elbows are common in general water pipes, but with the improvement of living standards, many water pipes are changed to stainless steel elbows. Because manganese steel has excellent properties of alloy elbow to withstand impact, extrusion and material wear, alloy elbow made of manganese steel is usually used in seriously worn pipes such as concrete pipes and mud pipes. High manganese steel alloy elbow is used in pipelines with severe fluid flow and strong impact; Nickel-steel alloy elbow is a variety of heads, usually used in pipelines with high concentration of oxidizing acid (nitric acid, sulfuric acid, etc.). ) at room temperature, but it will be seriously corroded in the pipeline of reducing acid (hydrochloric acid, dilute sulfuric acid, etc.). ) unless the hydrochloric acid concentration is very low; Martensite alloy elbow has high high temperature strength below 650℃, and oxidation-resistant alloy elbow is widely used and resistant to water vapor corrosion, but its weldability is poor. Therefore, it is often used in high temperature steam pipelines and water gas pipelines.