Concentric Reducer standard

　　Welding of Concentric Reducer is also called different diameter pipe is one of the chemical pipe, used to connect two different diameter. Is divided into concentric reducer and an eccentric different diameter pipe. GB American Standard British standard and various non-standard pressure stamping "steel butt welding fittings" provisions of the size of GB/T13401-2005 welding

　　Welding of Concentric Reducer is also called different diameter pipe is one of the chemical pipe, used to connect two different diameter. Is divided into concentric reducer and an eccentric different diameter pipe. Concentric Reducer standard welding GB American Standard British standard and various non-standard pressure stamping "steel butt welding fittings" GB/T13401-2005 regulations

　　The welding quality of Concentric Reducer should be consistent with existing national standards "seamless steel butt welding fittings" GB/T 12459-2005

　　Standard of Ministry of electric power GD0506~0507

　　Groove clamp type welding of Concentric Reducer

　　The national standard (GB/T9112-2000)

　　The machinery of the standard (JB81-59, JB/T74-94)

　　Petrochemical Department standard (SH3406-96)

　　The standard of Ministry of chemical industry (HG5010-58, HG20592-97)

　　Welding of Concentric Reducer is also called different diameter pipe is one of the chemical pipe, used to connect two different diameter. Is divided into concentric reducer and an eccentric different diameter pipe. Welding of Concentric Reducer material including Concentric Reducer, the welding of stainless steel alloy steel, welding of Concentric ReducerConcentric Reducer, Concentric Reducer20, such as welding q234q345 steel. Concentric Reducer standard welding GB American Standard British standard and various non-standard pressure stamping "steel butt welding fittings" GB/T13401-2005 regulations

　　The welding quality of Concentric Reducer should be consistent with existing national standards "seamless steel butt welding fittings" GB/T 12459-2005

　　Standard of Ministry of electric power GD0506~0507

　　(scope of application)

　　1, when the pipe fluid flow changes, such as increasing or decreasing, velocity changed requirements, must be used for welding of Concentric Reducer.

　　In 2, the inlet of the pump, in order to prevent cavitation, need to adopt the welding of Concentric Reducer.

　　3, with the instrument, such as a joint flowmeter, regulating valve, in order to joint and the instrument with, also requires the use of welding Concentric Reducer.

　　Welding of Concentric Reducer roundness should not be greater than the corresponding end diameter 1%, and the allowable deviation is 3mm. Welding of Concentric Reducer material SY/T5037, GB/T9711, GB/T8163, implementation of ASTM A106/A53 GRB American Standard, API 5L, APT5CT, ASTM A105, ASTM A234, ASTM A106, German standard DIN standard and customer requirements

　　Welding of Concentric Reducer (reducer) is used for a pipe diameter of the pipeline. Forming technique is usually used for necking, expanding to suppress suppressed or shrink diameter and diameter expansion pressing, for some specifications of welding Concentric Reducer also can use stamping forming.

　　Necking / expanding

　　Welding of Concentric Reducer necking forming process is put into the forming die and tube billet welding diameter equal to Concentric Reducer end, along the axial direction by pressing the tube blank, so that the metal along the die cavity and forming movement. According to the welding of Concentric Reducer diameter size, divided into a pressing or repeatedly pressing forming.

　　Different diameter pipe roundness should not be greater than the corresponding end outside diameter 1%, and the allowable deviation is 3mm. Different diameter pipe material implementation of SY/T5037, GB/T9711, GB/T8163, ASTM A106/A53 GRB American Standard, API 5L, APT5CT, ASTM A105, ASTM A234, ASTM A106, German standard DIN standard and customer requirements of different diameter pipe (Concentric Reducer) is used for a pipe diameter of the pipeline. Forming technique is usually used for necking, expanding the suppression of pressing or reduced diameter and hole diameter repression, also can use stamping forming for some specifications of different diameter pipe

　　Hebei shengtian pipe-fitting group Co., ltd is specialized in manufacturing and exporting a variety of stainless steel,carbon steel pipe fititngs such as elbows, tees, reducers ,forged flanges etc. We are standard and non-standard flange mamufacure.All kind of pipe fittings, flanges are according to the international standard to produce.Each product,the quality meet the international standard inspection technical standard. We warmly welcome customers at home and abroad to visit our factory and seek common development.