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large caliber flange pipe fittings stainless steel flange
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Flat welding flange
Plate-type flat welding flange (chemical standard HG20592, national standard GB/T9119, mechanical JB/T81) : convenient to draw, simple to manufacture, low cost, and widely used; However, the rigidity is poor, so it shall not be used in the chemical process piping system with requirements of supply and demand, inflammability, explosibility and high vacuum degree, and the high and extremely harmful situations. The sealing surface type has the plane and the surface.