GB 50235《工(gong)(gong)(gong)業(ye)金(jin)屬管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)工(gong)(gong)(gong)程(cheng)施工(gong)(gong)(gong)規(gui)范》配套使用GB50184《工(gong)(gong)(gong)業(ye)金(jin)屬管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)工(gong)(gong)(gong)程(cheng)施工(gong)(gong)(gong)質量驗收規(gui)》和(he)GB 50236《現(xian)場設備(bei)、工(gong)(gong)(gong)業(ye)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)焊接(jie)工(gong)(gong)(gong)程(cheng)施工(gong)(gong)(gong)規(gui)范》。工(gong)(gong)(gong)業(ye)金(jin)屬壓(ya)力(li)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)應按TSG D001《壓(ya)力(li)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)安全技術監察規(gui)程(cheng)-工(gong)(gong)(gong)業(ye)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)》的(de)規(gui)定劃分為(wei)(wei)GC1、GC2、GC3三(san)個等(deng)級。除壓(ya)力(li)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)以外(wai)的(de)其(qi)他管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)，應按C類(lei)流(liu)(liu)體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)和(he)D類(lei)流(liu)(liu)體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)分類(lei)。D類(lei)流(liu)(liu)體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)指不可燃(ran)、無毒(du)或毒(du)性(xing)(xing)為(wei)(wei)輕度(du)(du)危害(hai)程(cheng)度(du)(du)、設計壓(ya)力(li)小于或等(deng)于1.0MPa。和(he)設計溫度(du)(du)高于一(yi)20℃但不高于185℃的(de)流(liu)(liu)體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)。C類(lei)流(liu)(liu)體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)指不包括D類(lei)流(liu)(liu)體(ti)(ti)(ti)的(de)不可燃(ran)、無毒(du)或毒(du)性(xing)(xing)為(wei)(wei)輕度(du)(du)危害(hai)程(cheng)度(du)(du)的(de)流(liu)(liu)體(ti)(ti)(ti)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道(dao)(dao)。