Types: Galvanized welded steel pipe, galvanized seamless steel pipe Materials: Carbon steel Connection type: threaded Size range:1/8³-36³ Schedule: sch40, sch80, sch120, sch160, XH, XXH Length of the galvanized tubes - in diameter 4 16 mm 6000 + 100 mm - in diameter 18 42 mm 6000 + 50 mm Tolerances of the zinc coated tubes - tolerances of the outside diameter: - diameter between 4 30 mm ±0,08 mm - diameter between 35 38 mm ±0,15 mm - diameter up to 42 mm ±0,20 mm - tolerances of the inside diameter are according to EN 10305-4 - tolerance of the wall thickness ± 10% The Steel grades for the zinc coated tubes E 235+N and E 355+N Building and structural material .Mechanical and general engineering purposes Manufacturing of Bus Body, Railway Boogies In Telephone department as Conduit Pipes Material Inspection (Steel Pipe) Hanging Degreasing Rinsing Pickling Washing Dipping Fluxing Hot Air Drying Inside and Outside Hot-dipped Galvanizing Blow Cooling Passive and Rising Unloading Inspection and Trimming Type Identification Packaging and Storing and Transportation Size: OD: 21.3mm ~ 610mm;WT: 0.5mm ~ 20mm;LENGTH: 0.3mtr ~ 18mtr, Ramdon Length, Fixed Length, SRL, DRL Standard & Grade: GB/T 3091 Q195/Q215/Q235/Q345, BS 1387, EN 39, EN 1139 S235JR/S275JR, ASTM A53 GR. A/B/C, JIS G3444 STK 400/STK 500 Ends: Square Cut/Threaded, Burr Removed