一般主要用途的20#无缝钢管由一般的碳素钢、低合金工具钢或合金工具钢冷轧，生产量多，关键作为输送液体的管路或构造零件依据主要用途不一样分三类供应：

　　a、ANCHENGFENHEWULIXINGNENGGONGYING;

　　b、ANWULIXINGNENGGONGYING;

　　c、ANDAYASHIYANGONGYING。ANa、bLEIGONGYINGDEGANGGUAN，RUYONGYICHENGDANYETIYALI，HAIYAOKAIZHANDAYASHIYAN。

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　　20#WUFENGGANGGUANPUBIANYONGYIZHIZAOLINGBUJIANHEJIXIELINGJIAN，RUSHIYOUZUANJU、CHUANDONGZHOU、ZIXINGCHECHEJIAJIQIJIANZHUGONGCHENGSHIGONGXUANYONGDEGANGGANGGUANJIAOSHOUJIADENGYONGGANGGUANZHIZAOHUANZHUANGLINGJIAN，KETISHENG YUANCAILIAOSHIYONGLV，JIANDANHUAZHIZAOGONGYILIUCHENG，JIESHENGYUANCAILIAOHESHENGCHANJIAGONGSHIGONGSHIJIAN，YIPUBIANYONGGANGGUANLAIZHIZAO。