普通螺栓连接施工中应注意哪些问题? 下面这段英文，供参考 1.ensure that the correct size and material of bolting is used.(refer to the piping specification) 2.allow for two threads to be exposed outside the nut once tightened,the only exception to this is when a flange requires hydraulic bolt tensioning and an additional length of bolt to be exposed outside the nut will be specified. 3.only use clean,rust free nuts and bolts. 4.coat the stud,the nut thread,the nut and the flange bearing surfaces with the selected bolt thread lubricant(torque tightening only) 5.ensure the nut is free running ideally along the full length of the bolt ,but especially around the area where the nut will be tightened. 6.ensure that the flange area on which the nut will seat is clean and undamaged as unanticipated frication or compressible debris will adversely affect the residual bolt load.查看更多
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