The Hongyuan designed for: 316L Flat welding flanges welded flange, PL: designed for: flat welding flange with diameter flange, stainless steel flange (Contact: 187,327,0358 QQ: 619688609) company mainly engaged in various Pipe of the kinds of material: 304,304 L, 316,316 L, 321,310 S ,18-8, 16Mn, 20 #, 20G, petroleum, chemical, metallurgy, electric power, shipbuilding, machinery and other industries of 12Cr1MoVG, P91, 10CrMo910, 15CrMo F51, etc. pipes, valves, pressure vessels, condensers, heat exchanger, tower, manhole, hand hole flange connections sealed. The welded flange sealing surface forms: raised face (RF), the concave (FM), convex (M), the tenon surface (T), the groove surface (G), the whole plane (FF). With neck flat welding flange diameter range: DN10 ~ DN600 Scope: PN Series PN2.5 ~~ PN40; Class Series Class150 ~ Class1500 flange material: carbon steel, Luo molybdenum steel 304,316,304 L, 316L, 321,347, CF8C. Manufacturing process: forging. Advantages: with neck flat welding flanges are welded flange, because there is a short-necked, thereby increasing the strength of the flange improved flange bearing efforts. It can be used in higher pressure pipelines. Disadvantages: higher cost, compared with the plate welded flange in transit due to the characteristics of its shape more easily bump