Seamless pipe with unequal diameters
Seamless Carbon Steel ReducerIf the selected diameter specification does not match the inner diameter of the process pipeline, corresponding reduction or expansion treatment should be performed. When reducing the pipeline, consider whether the resulting pressure loss will affect the process flow. GB Carbon SteelDivergent pipeTo prevent the installation of unequal diameter pipes from affecting the distribution of the flow field, causing a loss in pressure, which in turn reduces the measurement accuracy of the electromagnetic flow meter, the required central cone angle α should not exceed 15°, the smaller, the better.
Carbon steel unequal diameter pipes, also known as carbon steel reducing elbows, are formed through a reduction forming process. This involves placing a billet with a diameter equal to the larger end of the pipe into a mold, then compressing it axially to cause the metal to move and contract within the mold cavity. Depending on the size of the reduction, they are formed in a single or multiple pressing steps.
The roundness of the national standard carbon steel reducing elbows should not exceed 1% of the corresponding outer diameter of the ends, and the allowable deviation is ±3mm. The material of the reducing elbows complies with SY/T5037, GB/T9711, GB/T8163, ASTM A106/A53GRB, API 5L, APT 5CT, ASTM A105, ASTM A234, ASTM A106, DIN German standards, and customer-specified standards.
National standard carbon steel reducing elbow is used at the transition point of pipe diameter changes.FittingsTypically, the forming processes used include reducing diameter pressing, expanding diameter pressing, or a combination of both. For certain sizes of eccentric pipes, stamping forming can also be employed.
Carbon steel equal tees in accordance with national standards can be divided into types based on manufacturing methods, such as extrusion, pressing, forging, casting, etc.
Carbon steel elbows with different diameters, classified by national standards, can be divided into national standard, electric standard, ship standard, chemical standard, water standard, American standard, German standard, Japanese standard, Russian standard, etc.
