The wall thickness standards of hot-dip galvanized steel pipes vary according to different applications and specifications. Here are some criteria for various situations:
General purpose: According to the national standard GB/T3091-2008, the wall thickness of hot-dip galvanized thickened steel pipes ranges from 0.6mm to 20mm.
For low-pressure fluid transportation and mechanical structures: also based on GB/T3091-2008, wall thickness range is 0.6mm to 20mm.
Oil and gas transportation: According to GB/T9711.1-1997 and GB/T9711.2-1999, the wall thickness range is 3mm to 25.4mm.
Welded steel pipe: According to the regulations of GB/T 3091-2015, the standard wall thickness of hot-dip galvanized steel pipe is as follows:
For pipe diameters of DN15-DN200, the wall thickness should be 2.0mm.
For pipe diameters of DN250-DN300, the wall thickness should be 2.5mm.
For pipe diameters of DN350-DN400, the wall thickness should be 3.2mm.
For pipe diameters of DN450-DN500, the wall thickness should be 3.6mm.
For pipe diameters of DN550-DN600, the wall thickness should be 4.0mm.
For pipe diameters of DN650 and above, the wall thickness should be no less than 3.5mm.
It should be noted that the above information may change as standards are updated or implemented in different regions.
