Alloy elbow is a general term for many kinds of elbows, with various materials. The common materials are carbon steel, nickel steel, manganese steel, etc. Alloy elbows are widely used. Ordinary bronze alloy elbows are generally used in water supply pipes, but with the improvement of living standards, many water supply pipes use stainless steel elbows. Alloy elbows made of manganese steel are usually used in pipelines with severe wear and consumption, such as mud transmission pipelines and concrete transmission pipelines, because manganese steel has excellent performance of withstanding extrusion, impact and material wear.
While the high manganese steel alloy elbow is used in the pipeline with intense fluid flow and strong impact; Alloy elbow made of nickel steel is usually used in normal temperature transmission pipeline with high concentration of oxidizing acid (nitric acid and sulfuric acid), but it will be severely corroded in transmission pipeline with reducing acid (hydrochloric acid, dilute sulfuric acid, etc.), unless the concentration of hydrochloric acid is very low; Martensitic alloy elbow has high oxidation resistance, high temperature strength and water vapor corrosion resistance below 650 ℃, but its weldability is poor. Therefore, it is often used in high-temperature steam transmission pipeline and water gas pipeline. Executive Standards: GB / t12459-2005, GB / T13401 and GB / t10752-1999.
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