遼寧直角方距管售后保障廠家批發

應用：
重型鋼結構
航天工程
高鐵
船舶制造
機械用無縫鋼管
汽車及高速列車用無縫鋼管
化工及鍋爐用無縫鋼管
橋梁用無縫鋼管
三，證書
CE EN10210-1:2006
CE EN10219-1:2006
CE EN10204.3.1 
CE EN10204.3.2
ABS Certificate (American Bureau of Shipping)
ISO9001:2008
SGS BV etc.
四，標準
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
JISG 3466(Japan)
Carbon steel square pipes for general structural purposes
AS 1163(Australia)
Structural Steel Hollow Sections