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Introduce the manufacturing method of reducer pipes.
Release time:
Mar 16,2022
The roundness of reducer pipes shall not exceed 1% of the corresponding outer diameter at either end, and the allowable deviation is ±3 mm. The materials used for reducer pipes shall comply with SY/T5037, GB/T9711, GB/T8163, U.S. standards ASTM A106/A53 GRB, API 5L, APT5CT, ASTM A105, ASTM A234, ASTM A106, DIN German standards, and any standards specified by the customer.
The roundness of reducer pipes shall not exceed 1% of the corresponding outer diameter at either end, and the allowable deviation is ±3 mm. The materials used for reducer pipes shall comply with SY/T5037, GB/T9711, GB/T8163, U.S. standards ASTM A106/A53 GRB, API 5L, APT5CT, ASTM A105, ASTM A234, ASTM A106, DIN German standards, and the standards specified by the customer.
A reducer (also known as a reducing coupling or eccentric reducer) is a pipe fitting used at locations where the pipe diameter changes. The commonly employed forming processes include restricted reduction, restricted expansion, or a combination of restricted reduction and expansion. For certain specifications of reducers, stamping can also be used for forming. The schematic diagram illustrates the process of restricted reduction for concentric reducers—this is the method used to form concentric reducers by means of restricted reduction.
The reducing-diameter forming process for reducer pipes involves placing a tube blank with a diameter equal to that of the larger end of the reducer pipe into a forming die. By restricting the movement of the metal along the axial direction of the tube blank, the metal is forced to flow into the die cavity and undergo reduction in diameter. Depending on the magnitude of the diameter change in the reducer pipe, the process can be classified as either single-stage restriction forming or multi-stage restriction forming.
Bulging forming involves using a tube blank whose diameter is smaller than the larger end diameter of the reducer pipe, and then using an internal punch to expand the blank along its inner diameter. The primary purpose of the bulging process is to address the difficulty in reducing the diameter of reducer pipes with excessively large diameter variations. In some cases, depending on the material and the specific requirements of product formation, the bulging and reducing processes may be combined.
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