Hot-dip galvanized steel pipe uses welded steel pipe as the base pipe. After pickling and fluxing, it is integrally immersed in molten zinc at about 450°C, forming a zinc layer and zinc-iron alloy layer on the inner and outer walls. The coating is firmly bonded and thick, and it is one of the most widely used anti-corrosion steel pipes in outdoor humid environments and fluid transportation engineering.
Standards and Material
Base pipe standard: GB/T 3091-2015 "Welded steel pipe for low-pressure fluid transportation"
Galvanized layer: GB/T 13912, with clear requirements for coating weight, uniformity and adhesion
Common material: Q235B
Conventional Specifications
| Item | Conventional Range |
|---|---|
| Nominal diameter | DN15-DN300 (OD about 21.3-323.9mm) |
| Wall thickness | According to GB/T 3091 ordinary/thickened series |
| Length | Conventional 6m |
| End processing | Threading, grooving (rolling), beveling all available |
Product Features
Inner and outer walls galvanized simultaneously, rust and corrosion resistant, long service life
Stable pressure resistance, mature connection methods such as thread, groove, flange
Many stock specifications, suitable for centralized procurement
Main Applications
Building water supply, fire sprinkler, electrical threading, scaffolding and support, greenhouse, HVAC pipeline, and municipal, factory and mine pipeline network with anti-corrosion requirements (special media such as gas must use pipe material with corresponding qualification).