Galvanized steel pipe the galvanized steel pipeline zinc finish: Pre-galvanized: Z80-120g/ m2; Hot dip galvanized: Z230-500g/ m2. Hot dipped galvanized steel pipes & Pre-galvanized steel pipe specification: Out Diameter: 1/2-24â?³( 21.3mm-610mm) Wall Thickness: SCH10, SCH30, SCH40, STD, XS, SCH80, SCH160, XXS etc. Standard: BS1387, ASTMA53/A106/500,API 5L,GOST8731/8732, G3457,EN10255/10219, GB/T13912, EN39, EN ISO 1461, DIN2391, IS2062, AS/NZ 4680 Steel Grade: A106, A53, A179, A192, Q195/Q215/Q235/Q345, ST37/44/52, S355, S235, S275 and so on Zinc Coating: Pre-galvanized type: 60-150g/m2 â?? Hot-dipped galvanized type: 200-500g/m2 â?? Cold-dipped galvanized type: 10-50g/ m2 Pipe Section form: Round/Square/Rectangular/ oval Ends: thread( screw) with coupling; plain; beveled Application: 1. For reduced pressure liquid shipment such as water, gas and oil 2. For building and construction, e.g building greenhouse