Hongyuan size head fittings, Concentric, stainless steel size head (Contact Person: Feng, Hongmei Contact: 15,932,713,817 QQ: 1,763,757,819) The Company is mainly engaged in various materials pipe: 304,304 L, 316,316 L, 321,310 S, 18 -8,16 Mn, 20 #, 20G, 12Cr1MoVG, P91, 10CrMo910, 15CrMo diameter pipe reducer, also known as the size of the head, diameter pipe, Reducing straight. Chemical one of the fittings for the connection between the two different-diameter pipe. Concentric and eccentric size of the first two, divided according to the different shape. The size of the first materials including stainless steel size head (304304l316316l), alloy steel, carbon steel head size, the size of the first made of 20 steel, Q235, Q345, 16Mn. The main producing area in Hebei Province Yanshan mengcun County vicinity. The size of the first standard GB American Standard British standard and non-standard products. Ministry of Electricity Standard GD0506 to 0507 the supporting pressure vessel flange, tube plate corresponding standard: JB/T4700 ~ 4707-2000 implementation of national standards (GB/T9112-2000), Department of Mechanical standards (JB/T81-1959, JB/T74- 1994), petrochemical Standards (SH3406-1996), marine standards GB/T10752-1999, Ministry of Chemical Industry Standard (HG/T5010-1958, HG/T20592-2009). Export forged steel flange material ASTM A105 standards in accordance with the United States.