pre-galvanized steel pipe
a. Outer Diameter: 1/2" to 2"(21.3mm to 60.3mm)
b. Wall Thickness: 0.03" to 0.091"(0.8mm to 2.31mm)
c. Standard: BS 1387-1985, ASTM A53, GB/T 3091
d. Steel Grade: Q195, Q215, Q235