法兰及其接头 螺栓连接 第1部分：螺栓连接的选择 EN 1515 (-1) - 1999
适用范围
本标准适用于根据EN 1092系列为PN指定法兰和根据EN 1759系列为等级指定法兰选择螺栓。规定了螺栓、双头螺栓和螺母的尺寸、材料和交货技术条件的标准。
标准内的螺栓选择与EN 1092系列和EN 1759系列的法兰联合使用，但不适用于一般用途。
材料的选择基于常用材料，涵盖了标准法兰的一般服务所需的所有压力和温度范围。对于特殊应用，用户可以选择其他材料。在某些情况下，也包括相似的合金，这些合金之间仅在碳含量上有所不同（例如0.25%或0.42%），这是由于各国标准的要求不同。
螺栓类型选择
尺寸标准 | 材料及等级 | 说明 | |
螺栓 | 螺母 | ||
4.6/5 | 六角头螺栓 | ||
all | 六角头螺栓 | ||
① | EN 24032 | all | 双头螺栓 |
① Stud bolts threaded full length：The points shall be chamferred or rounded at the manufacture′s option The heigh of point shall be a maximum one times the pitch of thread.The length of stud bolts has to be measured including points. The lengths are stepped by increments of 5 mm for lengths up to 80 mm, by increments of 10 mm for lengths above 80 mm and up 10 200 mm, and by increments of 20 mm for lengths above 200 mm. Thread in accordance with ISO 261, ISO 965-2 tolerance class 6g. Type of thread is either coarse thread or above M39 fine thread wilh 4 mm pitch.The type of thread shall be selected by the user. Fine thread above M39 is nonnally used for industrial plants. coarse thread up to and including M64 is nonnally used for water service. | |||