鍍鋅(xin)鐵皮(pi)聚(ju)氨酯保溫(wen)管由輸送介質的鋼管及聚(ju)氨酯硬質泡沫塑料保溫(wen)層、鍍鋅(xin)鐵皮(pi)外護管緊密結合而成。

鋼(gang)(gang)(gang)(gang)管(guan)(guan)及(ji)鋼(gang)(gang)(gang)(gang)質(zhi)管(guan)(guan)件(jian)： 分別采用(yong)(yong)(yong)20#無(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)和Q235B雙面埋弧焊螺旋(xuan)鋼(gang)(gang)(gang)(gang)管(guan)(guan)及(ji)直縫(feng)(feng)焊鋼(gang)(gang)(gang)(gang)管(guan)(guan)、304不(bu)銹鋼(gang)(gang)(gang)(gang)管(guan)(guan)，鋼(gang)(gang)(gang)(gang)管(guan)(guan)表(biao)面經過(guo)先(xian)進(jin)的拋(pao)丸除銹工(gong)(gong)藝處理后，鋼(gang)(gang)(gang)(gang)管(guan)(guan)除銹等(deng)級(ji)GB8923-1988標(biao)準(zhun)(zhun)中(zhong)的Sa2級(ji)，表(biao)面粗(cu)糙(cao)度可(ke)達GB6060.5-88標(biao)準(zhun)(zhun)中(zhong)R=12.5微米。性能指標(biao)符合國(guo)家(jia)及(ji)石油部(bu)標(biao)準(zhun)(zhun)；無(wu)(wu)縫(feng)(feng)鋼(gang)(gang)(gang)(gang)管(guan)(guan)采用(yong)(yong)(yong)GB/T8163-1999標(biao)準(zhun)(zhun)；直縫(feng)(feng)焊鋼(gang)(gang)(gang)(gang)管(guan)(guan)采用(yong)(yong)(yong)GB/T3091-2001。 通常情(qing)況下，DN20-DN150采用(yong)(yong)(yong)無(wu)(wu)縫(feng)(feng)或電焊鋼(gang)(gang)(gang)(gang)管(guan)(guan)，DN200以上采用(yong)(yong)(yong)螺旋(xuan)鋼(gang)(gang)(gang)(gang)管(guan)(guan)，也(ye)可(ke)根據工(gong)(gong)程(cheng)需要采用(yong)(yong)(yong)用(yong)(yong)(yong)戶要求的各類鋼(gang)(gang)(gang)(gang)管(guan)(guan)。鋼(gang)(gang)(gang)(gang)質(zhi)管(guan)(guan)件(jian)采用(yong)(yong)(yong)推制(zhi)或壓制(zhi)工(gong)(gong)藝。 執(zhi)行標(biao)準(zhun)(zhun)：鋼(gang)(gang)(gang)(gang)制(zhi)對焊管(guan)(guan)件(jian)GB/T12459-2005 鋼(gang)(gang)(gang)(gang)板制(zhi)對焊管(guan)(guan)件(jian)GB/T13401-2005 鋼(gang)(gang)(gang)(gang)制(zhi)彎(wan)管(guan)(guan)SY/T5257-2004