Roundness eccentric reducer should not exceed 1% of the respective ends of the outer diameter, and the tolerance of ± 3mm; concentric reducer centerline ends should overlap, their eccentricity tolerance of ± 5mm. Eccentric reducer size tolerances shall comply with Table 4.2.2-3 of. Quality eccentric reducer should be consistent with existing national standards, "welded steel seamless pipe fittings" GB / T 12459-2005, and with the core diameter pipe, and shall meet the following requirements: 1) there should be no appearance reducer crack, heavy leather wall thickness greater than the thickness of the large diameter end of the tube segment. 2) The roundness diameter pipe should not exceed 1% of the respective ends of the outer diameter, and the tolerance of ± 3mm; concentric reducer centerline ends should overlap, their eccentricity tolerance of ± 5mm. 3) Reducing pipe size tolerances shall comply with Table 4.2.2-3 of. Eccentric reducer to set the temperature too high can cause silicon carbon tubes and diameter pipe rupture, the need to re-set temperature. The heating element is a double thread silicon carbon tube, protective tube outer corundum, corundum external protection tube is a new type of insulation material, combustion tube diameter pipe made of corundum, silicon carbide tube inserted directly inside. Characteristics of stress distribution or modification of: (1) Pressure concentric reducer size of the area under the pressure difference between the ends of the big end of bending moments caused relatively open, relatively small end of the contraction of the phenomenon; (2) the role of the eccentric inner pressure differences diameter tube and the inner surface of the large end eccentric eccentric side of the outer surface of the central side of the hoop stress maximum. Concentric reducer is hot pressing or forging steel molding reducer, eccentric reducer, which is connected directly to the form diameter welded pipe and tube, concentric reducers major manufacturing standards generally GB / T12459, GB / T13401, ASME B16.9, SH3408, SH3409, HG / T21635, HG / T21631, SY / T0510. And there are corresponding concentric reducer eccentric reducer, reducers, materials are carbon steel, alloy steel and stainless steel. Yanshan County Bo Yan Pipe Co., Ltd. wholeheartedly welcome new and old customers to visit the factory, inspected and negotiations guidance, growing customer demand, is our eternal pursuit of unremitting efforts, Yanshan County Bo Yan Pipe Co., Ltd. staff , willing to quality products, good service, dedication and work together with friends and achieve win-win situation, create brilliant. Diameter pipe, with the core diameter pipe, Bo Yan Pipe (high merchant) by Bo Yan Pipe Co., Ltd. Yanshan County. Yanshan County Bo Yan Pipe Co., Ltd. (www.czbygy.com) in this area elbow devoted boundless enthusiasm and passion, Bo rock pipe industry has been customer-centric, to create value for customers concept of quality, service to win market, and sincerely hope to cooperate with the community to create success, to create brilliant. Related businesses welcome inquiries, contact: Wenjiang.