Quality carbon steel reducers should be consistent with the current national standard "diameter welded steel pipe pieces" provisions of GB / T 12459-2005, the roundness diameter pipe should not exceed 1% of the corresponding end of the outer diameter, and allows deviation of ± 3mm; diameter pipe size tolerances shall comply with the provisions of Table 4.2.2-3. Reducers perform SY/T5037, GB/T9711, GB/T8163, American Standard ASTM A106/A53 GRB, API 5L, APT5CT, ASTM A105, ASTM A234, ASTM A106, DIN German standards and customer requirements standards. 1) diameter pipe should not have the appearance of cracks, heavy leather eccentric reducer manufacturers, wall thickness should be greater than the wall thickness of the large diameter end of the pipe segment. 2) diameter pipe roundness should not exceed 1% of the respective ends of the outer diameter, and the tolerance of ± 3mm; concentric reducer should coincide with the center line of the two ends, the value of its eccentricity tolerance of ± 5mm. 3) diameter pipe size tolerances shall comply with the provisions of Table 4.2.2-3. Diameter pipe (size of the head) for a pipe at the pipe reducers. Forming process commonly used to necking repression, expanding repression or suppression of necking plus expanding on some of the specifications of the reducers may also be stamping. a. necking / expanding forming necking diameter pipe forming process is the big end diameter pipe with a diameter equal to the tube into the mold in the supply of quality eccentric reducer pipe, tube axial direction through repression the metal movement and contraction along the cavity forming. Depending on the size diameter pipe reducers, divided into one or more press-forming press forming. Below concentric reducer reduced diameter forming schematic. 106, DIN German standards and customer requirements standards. Dalian eccentric reducers | Eccentric reducers Price | Guotai specializes in producing eccentric reducer provided by Hebei Cathay. This information consists of: providing Hebei Cathay Pacific Pipeline Equipment Co. (www.hbgtgd.com), we are business alliance member, the integrity of the whole network authentication provider. Feel free to contact us, Contact: Liu