Galvanized steel pipe include hot dip galvanized steel pipe, cold galvanized steel pipe and precoated galvanized steel pipe. Standards complied ISO 1461, ASTM A123/A153, BS 1387, GB/T13912, etc. Zinc coting of hot dip galvanized is thicker. But zinc coating of cold galvanized and precoated galvanized is thin. Products usually uesed in urban heating, gas, low pressure air transport, mechanical structure, installation is also used for threading pipe, threaded connections.
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