Hot dip galvanized steel pipe is a welded steel pipe with a hot-dip galvanized or electro-galvanized layer on the surface.

Galvanizing can increase the corrosion resistance of the steel pipe and prolong its service life.

Comparison of implementation standards at home and abroad:

China: GB/T3091-2015 Galvanized welded steel pipe for low pressure fluid transportation.

GB/T14291-2006 Welded steel pipe for mining fluid transportation

American Standard: ASTM A143-2003 Standard for Hot-Dip Galvanized Structural Steel Products.

German standard: DIN EN ISO 1461 standard for hot-dip galvanizing of steel products.

Japanese standard: JIS G3442-2004 galvanized steel pipe for ordinary pipe system.

JIS G3443-1-2007 Galvanized steel pipe for water supply.

Comparison of domestic and foreign steel grades

China: Q235B/Q345B

American standard: ASTM A53/A283-D

German standard: (st33)1.003

Japanese standard: GGP/STRY41

Characteristics and application of hot dip galvanized steel pipe

The hot dip galvanized steel pipe has the advantages of thick zinc layer, uniform zinc layer, strong adhesion and long service life.

It is often used as a line pipe for conveying water, gas, oil and other general low-pressure fluids. It is also used as oil well pipes and oil pipes in the petroleum industry, especially offshore oil fields, as well as oil heaters, condensing coolers, and coal distillation wash oil exchange in chemical coking equipment. Pipes for equipment, pipe piles for trestle bridges, pipes for supporting frames of mine tunnels, etc.