Stainless Steel GB size head

Stainless steel GB size head is a large and small head of a, large and small head material including stainless steel head (304304l316316l), alloy steel, carbon steel head, size Head No. 20th Steel q234q345 and so on. Size Head Standard: GB American Standard English Standard and a variety of non-standard high-pressure stamping. Ministry of Electricity standard GD0506~0507 pressure vessel matching flange, pipe plate corresponding standard: JB/T4700~4707-2000 implementation of national standards (GB/T9112-2000), Mechanical department standards (JB/
T81-1959,JB/T74-1994), Petrochemical Department Standard (SH3406-1996), Ministry of Chemical Industry Standard (HG/T5010-1958,HG/T20592-2009) and so on. Export forging steel flange material in line with the United States ASTM A105 standard. The large and small head is also called the diameter tube, which is used for the pipe excess of different pipe diameters in the pipe.