GB 50235《工(gong)(gong)(gong)(gong)業(ye)金(jin)(jin)屬(shu)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)工(gong)(gong)(gong)(gong)程施(shi)工(gong)(gong)(gong)(gong)規范》配套使用GB50184《工(gong)(gong)(gong)(gong)業(ye)金(jin)(jin)屬(shu)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)工(gong)(gong)(gong)(gong)程施(shi)工(gong)(gong)(gong)(gong)質量驗收(shou)規》和(he)GB 50236《現場設備、工(gong)(gong)(gong)(gong)業(ye)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)焊接(jie)工(gong)(gong)(gong)(gong)程施(shi)工(gong)(gong)(gong)(gong)規范》。工(gong)(gong)(gong)(gong)業(ye)金(jin)(jin)屬(shu)壓力(li)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)應按TSG D001《壓力(li)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)安全(quan)技術監察規程-工(gong)(gong)(gong)(gong)業(ye)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)》的規定(ding)劃分為(wei)(wei)GC1、GC2、GC3三個等級。除(chu)壓力(li)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)以外的其(qi)他管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)，應按C類(lei)流(liu)(liu)(liu)體(ti)(ti)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)和(he)D類(lei)流(liu)(liu)(liu)體(ti)(ti)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)分類(lei)。D類(lei)流(liu)(liu)(liu)體(ti)(ti)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)指不(bu)可(ke)燃(ran)、無毒(du)或毒(du)性為(wei)(wei)輕度(du)危害(hai)(hai)程度(du)、設計壓力(li)小(xiao)于或等于1.0MPa。和(he)設計溫(wen)度(du)高(gao)于一20℃但不(bu)高(gao)于185℃的流(liu)(liu)(liu)體(ti)(ti)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)。C類(lei)流(liu)(liu)(liu)體(ti)(ti)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)指不(bu)包括D類(lei)流(liu)(liu)(liu)體(ti)(ti)的不(bu)可(ke)燃(ran)、無毒(du)或毒(du)性為(wei)(wei)輕度(du)危害(hai)(hai)程度(du)的流(liu)(liu)(liu)體(ti)(ti)管(guan)(guan)(guan)道(dao)(dao)(dao)(dao)(dao)。