行业新闻 Industry News
螺栓的选用和不锈钢法兰的材质无关，欧洲体系按照HG20613-97《钢制管法兰用紧固件(欧洲体系)》HG20614-97《钢制管法兰垫片 紧固件选用(欧洲体系)》，美洲体系按照HG20634-97《钢制管法兰用紧固件(美洲体系)》HG20635-97《钢制管法兰垫片 紧固件选用(美洲体系)》选用，碳钢、不锈钢法兰通常选用专用级35CrMoA就可以满足要求。
不锈钢法兰一般采用将镀锌螺栓，这样可以防止生锈腐蚀。并不一定要用不锈钢螺栓，选用不锈钢螺栓是为了便于拆卸（碳钢的易生锈），在某些不能动火或其他特殊场合也可以选用；
法兰的材质不是螺栓材质选择的依据，只要预紧力足够了就可。采用碳钢螺栓也不一定需要加上绝缘垫片和套桶，加上绝缘垫片和套桶只是用于有可能带电的或管道内流体是易燃易爆的场合，这种场合选用不锈钢螺栓也要加上绝缘垫片和套桶。
Stainless steel flange bolt material selection and nothing to do with the European system in accordance with HG20613-97 "steel pipe flanges with fasteners (European system)" HG20614-97 "steel pipe flange gasket fastener selection (European System)" , Inter-American system in accordance with HG20634-97 "steel pipe flanges with fasteners (American System)" HG20635-97 "steel pipe flange gasket fastener selection (American system)," selection, carbon steel, stainless steel flange is usually used dedicated to meet the requirements 35CrMoA level. Stainless steel flange generally use the galvanized bolts, so to prevent rust corrosion. Not necessarily use stainless steel bolts, stainless steel bolts used to facilitate the demolition of (carbon steel rust), and in some not flare up or other special occasions can also be used; Flange bolt material selection is not the material basis, as long as the tightening force can be sufficient. Carbon steel bolts do not necessarily need to add insulation pads and drum sets, drum kits with insulated pads, and may be charged only for the pipeline fluid is flammable or occasion, this occasion use stainless steel bolts have to add insulation pads and drum sets.