The scope of specification,wall thickness and applicable standard of our products:

Square tube: 25X25X1mm---300X300X12.7mm

Rectangle tube:20X40X1mm---400X200X12.7mm

Round tube:￠25--￠377mm, 1-12.7mm

Applicable standard: GB/T6725-2002, EN10219-1997, EN10210, JIS466-8, ISO10799:2001, ASTM A500-03a, ASTM A53 , ASTM A252 , API 5L, DIN17118 1976