一、什么是Q345B方管
Q345B方管是一种中空的长条钢材，因为截面是正方形所以叫做方管。大量用作输送流体的管道，如石油、天燃气、水、煤气、蒸气等，另外，在搞弯、抗扭强度相同时，重量较轻，所以也广泛用于制造机械零件和工程结构。
二、Q345B方管用途
ZAIGONGYESHANGQ345BFANGGUANZHUYAOYONGLAIZUOYIXIESHUSONGGUANDAO，DANGRANZAIJIANZHUXINGYEZHONGTADEYUNYONGJIUGENGWEIGUANGFANLE，BIRUYONGZUOLOUTIFUSHOU，HUCHUANG，LANGAN，MALUGEDUANDENGDENG，MUQIAN，XUDUODECHANPINDOUYONGDAOLEBUXIUGANGGUAN，LIRUZIXINGCHE，YILIAOQIXIE，QICHEDENGDENG。
SAN、Q345BFANGGUANYOUDIAN
Q345BFANGGUANBEIGUANGFANDESHIYONG，DANGRANYESHIYOUYIDINGDEYUANYINDE，QIZHONGZHUYAODEJIUSHIQISHIYONGSHOUMINGHENZHANG，JUYOUHENHAODEKANGFUSHIXING，BINGQIEBENSHENZIZHONGJIAOQING，DANQIANGDUHENDA，WEICHANPINJIANSHAOLEFUZHONG，ZENGJIALEQICHENGSHOUNENGLI，RANGXIAOFEIZHEYONGDEGENGJIADEFANGXIN。
SI、Q345BFANGGUANGUIGEJIESHAO
WUFENGFANGJUGUANDEGUIGEYIBANZHIKANQINEIJINGYIJIBIHOU，QIZHANGDUDOUSHIKEYIGENJUXIAOFEIZHEDEXUQIUJUEDINGDE，SHIMIANSHANGCHANGJIANDEBUXIUGANGGUANDEGUIGEDAZHIYOU：NEIJING6.0mmYISHANG，BIHOU13mmYIXIA;NEIJINGDAYU30mm，BIHOUDAYU1.2mm;NEIJINGDAYU30mm，BIHOUXIAOYU1.2mmDENG。