Hebei Chiho Pipe butt neck collar with loose flange connection defined by a pair of flanges, a gasket and a number of bolts and nuts. Spacer placed between the two flange sealing surface deformation after tightening the nut standard stainless steel flange, the gasket surface than on the pressure reaches a certain value, and fill the sealing surface uneven, the coupling does not leak tight. Welding neck collar with loose flange screw connection points (wire tapping) flange and welding flange. Low pressure small diameter wire connection flange 304 stainless steel flanges, high pressure and low pressure are the use of large-diameter welded flange thickness and bolt diameter and the number of different connection flange pressures are different. According to different grades of stainless steel pressure flange dn200, flange gasket materials are also different from the low pressure asbestos gasket, high pressure asbestos gasket to metal pads are. 1. Material classified carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum, plastic, argon Ge Lek, ppc and so on. 2. production methods can be divided into forged flanges, casting flanges, welded flanges, rolled flange (large number) 3 to produce a standard can be divided into GB (Ministry of Chemical Industry, Petroleum standard, electricity standard) , American Standard, the German standard, Japanese standard, the Russian standard and so on. Hebei Chiho Pipe steel flange introduction; flange material can be divided according to production: WCB (Carbon), LCB (low carbon steel), LC3 (3.5% nickel steel), WC5 (1.25% Cr 0.5% Mo steel ), WC9 (2.25% Cr), C5 (5% Cr% Mo), C12 (9% Cr 1% Mo), CA6NM (4 (12% chromium steel), CA15 (4) (12% Cr), CF8M ( 316 stainless steel), CF8C (347 stainless steel), CF8 (304 stainless steel), CF3 (304L stainless steel), CF3M (316L stainless steel), CN7M (steel), M35-1 (Monel), N7M (hastelloy B ), CW6M (Hasta nickel alloy C), CY40 (Inconel, stainless steel flanges, stainless steel flanges, Hebei Chiho provide Hebei Chiho Industry Co., Ltd (www Chiho from Hebei Industry Co., Ltd .hbqh628.com) (www.hbqh628.com) strong, credible, Cangzhou in Hebei forging industry has accumulated a large number of loyal customers. The company better work attitude and continuously improve innovative ideas will lead you Chiho Hebei hand in hand into the brilliant, for a better future!