Reducing the size of the head tube, also known as carbon steel concentric reducer, divided into concentric and eccentric head size head. Implementation of standards GB / T12459-2005 and GB / T13401-2005. Mainly grown in Hebei Mengcun Hui Autonomous County area. Diameter pipe called the size of the head, is divided into concentric and eccentric head size of the first representation is the largest diameter multiplied by the small head diameter, such as "8 × 6" represents the bulk of the diameter is 8 inches, 6 inches in diameter small head size head . Pressure wall thickness Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, Sch100, Sch120, Sch140, Sch160, XXS material into carbon steel, alloy steel production of carbon steel reducer pipe, stainless steel pipe fittings Cangzhou Bohai Ltd. specializes in producing steel folding diameter pipe product standards GB American Standard British standard and non-standard high-pressure stamped "made of steel pipe fittings" provisions GB / T13401-2005 standard of Reducer Reducer quality management should be consistent with current national standard "welded steel seamless pipe fittings" GB / T 12459-2005 standard GD0506 ~ 0507 Ministry of clip-diameter pipe trench national standard (GB / T9112-2000) machinery of the standard ( JB81-59, JB / T74-94) Petrochemical Department of Standards (SH3406-96) Ministry of Chemical Industry Standard (HG5010-58, HG20592-97 diameter steel pipe, steel wholesale diameter pipe, Cangzhou Bohai (certified merchants) by Cangzhou Bohai Pipe Fittings Limited. Cangzhou Bohai Pipe Fittings Co., Ltd. (www.czbh628.com) (www.hbbh628.com) is specialized in the "elbow, flanges, reducers, hangers, flanging, intubation , welded flange, wear control "of the enterprise, the company of" honesty, hard service "concept, to provide you with the highest quality products and services are welcome to inquire Contact:! Zhangsong Wei.