Galvanized steel pipes, based on welded pipes, are coated with a layer of zinc on their surface to prevent rusting and corrosion. Each pipe is 6 meters long. There are two types of galvanized pipes: hot-dip galvanized and electro-galvanized (also known as cold-dip galvanized).
Weight Coefficients of Galvanized Steel Pipes
Nominal Wall Thickness (mm): 2.0, 2.5, 2.8, 3.2, 3.5, 3.8, 4.0, 4.5
Coefficient Parameters (c): 1.064, 1.051, 1.045, 1.040, 1.036, 1.034, 1.032, 1.028
Note: The mechanical properties of steel are crucial indicators that ensure its final service performance (mechanical properties), which are determined by the steel's chemical composition and heat treatment regime. In steel pipe standards, according to different usage requirements, tensile properties (tensile strength, yield strength or yield point, elongation), as well as hardness, toughness indicators, and high/low-temperature performance as requested by users, are specified.
Steel Grades: Q215A; Q215B; Q235A; Q235B
Test Pressure Values (Mpa): 3Mpa for D10.2-168.3mm; 5Mpa for D177.8-323.9mm
Production Steps of Galvanized Steel Pipes
The process flow is as follows: black pipe → alkaline wash → water wash → acid wash → rinsing with clean water → dipping in auxiliary agent → drying → hot-dip galvanizing → external blowing → internal blowing → air cooling → water cooling → passivation → rinsing with water → inspection → weighing → warehousing.
