... equipment line. 3.CE,ISO,ASTM A500,JIS ASTM A500 Galvanized Rectangular Steel Pipe 1. STANDARD:GB/T3094-2000, GB/T6728-2002, ASTM A500, JIS G 3466, DIN ... 16 years experience in this area.We engaged in research square and rectangular steel tube at the beginning of company established ... origination of production units.We have passed the standards of ASTM A500, JIS G 3466, DIN EN10210, GB/T178-2005, GB/ ...