Weight coefficient

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 important indicators to ensure the final performance (mechanical properties) of steel, which depends on the chemical composition of the steel and the heat treatment system. In the steel pipe standard, tensile properties (tensile strength, yield strength or yield point, elongation), hardness and toughness indexes, and high and low temperature properties required by users are specified according to different use requirements.

Steel grade: Q215A; Q215B; Q235A; Q235B.

Test pressure value / Mpa: D10.2-168.3mm is 3Mpa; D177.8-323.9mm is 5Mpa

Current national standard

Galvanized pipe national standard and size standard

GB/T3091-2015 welded steel pipe for low pressure fluid transportation

GB/T13793-2008 Straight seam electric welded steel pipe

GB/T21835-2008 Welded steel pipe size and unit length weight

Use editing

Instructions for use

The galvanized pipe, the galvanized pipe is also used for gas and heating. The iron pipe is also a galvanized pipe. The galvanized pipe is used as a water pipe. After a few years of use, a large amount of rust is generated inside the pipe. The yellow water flowing out not only pollutes the sanitary ware. And mixed with bacteria that grow on the inner wall of the slick, the rust causes the heavy metal content in the water to be too high, which seriously endangers the health of the human body.

Production steps

a, round steel preparation;

b, heating;

c, hot rolling perforation;

d, cutting head;

e, pickling;

f, grinding;

g, lubrication;

h, cold rolling processing;

i, degreasing;

j, solution heat treatment;

k, straightening;

l, cutting tube;

m, pickling;

n, finished product inspection.