无缝方管
方管型号：15x15mm---800x800mm
矩管型号：20x30mm---600x800mm
厚度：1-40mm
165-6620-9999
材质：Q235B S275JR S355J2H STK490 GRB/C/D Q345B/C/D/E S304 S316L et
表面（材料）：黑管，热镀锌，涂油，喷漆，喷砂等。
二，应用：
重型钢结构
航天工程
高铁
船舶制造
机械用无缝钢管
汽车及高速列车用无缝钢管
化工及锅炉用无缝钢管
桥梁用无缝钢管
三，证书
CE EN10210-1:2006
CE EN10219-1:2006
CE EN10204.3.1
CE EN10204.3.2
ABS Certificate (American Bureau of Shipping)
ISO9001:2015
SGS BV etc.
四，标准
DIN EN 10210 (Europe)
Hot finished structural hollow sections of non-alloy and fine grain steels
DIN EN 10219 (Europe)
Cold formed welded structural hollow sections of non- alloy and fine grain steels
ASTM A500 (American) Cold formed structural Circular sections and special sections (welded/seamless)
GB/T 3094-2000 (China)
Cold drawn forming steel tube
GB/T 6728-2002(China)
Cold formed structural hollow sections
JIS G3466(Japan)
Carbon steel square pipes for general structural purposes
AS 1163(Australia)
Structural Steel Hollow Sections