LSAW steel pipe ASTM A53 1>Standard: API 5CT, ASTM A53 2>Grade: L245, L290 up to L485 3>OD: ... 219mm - 2400mm 4>WT: 5-24mm LSAW steel pipe ASTM A531> Standard: API 5L PSL1/2, EN-10208-1/2 ... , GB9711.1/2, ISO, API 5CT, ASTM A532> Grade: X42 up to X70; L245, L290 up to ... provide most suitable scaffolding pipes to you. LSAW steel pipe ASTM A53