Application amount of smooth-type flat welding flange, weld steel flanges for nominal pressure of not more than 2.5MPa carbon pipe
connection welded flange sealing surface can be made into a smooth style. Used for medium conditions of relaxation circumstances, such
as low-voltage non-purified compressed air, low pressure circulating water, the advantage is the relatively inexpensive price,
reasonable structure, butt welding steel flange: for the the counterpart welding of the flange and pipe strength and rigidity to
withstand the high temperature pressure, and repeated bending and temperature fluctuations, reliable sealing. bump-type nominal pressure
of 0.25 2.5MPa welded flange sealing surface.
Flange production standards:
GB: GB/T9112-2000 GB9113 1-2000 GB9123? 4-2000
American Standard: ANSI B16.5 Class150 300 600 900 1500 WN SO BL TH LJ SW
Japanese Standard: JIS 5K 10K 16K 20K the PL SO the BL of WN the TH the SW
German standard: DIN2573 2572 2631 2576 2632 2633 2543 2634 2545 PL SO WN BL TH
Ministry of Chemical Industry Specification: HG5010-52 HG5028-58 HGJ44-91 HGJ65-91 with HG20592-97 Series, HG20615-97 Series
Ministry of Machinery Standard: JB81-59 JB86-59 JB/T79-94 JB/T86-94 JB/T74-1994
Pressure Vessel Code: JB1157-82 JB1160-82 JB4700-2000 JB4707-2000 B16.47A / B B16.39 B16.48.
Pipe socket welding flanges commonly used in the PN ≤ 10.0MPa DN ≤ 40, the flange contact with the media, local (short flange
section) for corrosion-resistant high-grade materials such as stainless steel and other materials, while the external use of low-grade
materials such as carbon steel flange ring clamp it in order to achieve the seal;
Commonly known as loose flanges, loose flanges: loose flanges points welding ring loose flanges, flange live flanges and butt loose
flanges. Commonly used in medium temperature and pressure is not high and medium corrosion strong. When the strong corrosive medium.
Rare integral flange welded flange and welded flange. Flange pipe fittings refers to with a flange (flange or disk access) fittings. By
casting, stainless steel flanges fittings, pipe and tube interconnected parts. Divided by type of structure. By threaded connection or
welded form. Flange connection refers to a pair of flanges, a gasket and a number of bolts and nuts. On the two flange sealing surface
between the gasket, and tighten the nut on the gasket surface deformation than the pressure reaches a certain value, and fill the Office
of the uneven surfaces of the sealing surface, so that the connection not leak tight. The flange connection is a removable connection.
Holes in the flange, can be worn bolts, two flange abuts between the flange gaskets for sealing. Connected components can be divided
into the container flange and pipe flange.
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