Hot-dipped galvanized treatment : 1. Uniformity of galvanized coating: the steel tube sample shall not turn red (copper-plated color) after being continuously impregnated in copper sulfate solution for 5 times. 2, surface quality: the surface of galvanized steel pipe should be a complete galvanized layer, there should be no unplated black spots and bubbles, there is not much rough surface and local zinc tumor is allowed to exist. 3, galvanized layer weight: according to the requirements of the buyer, galvanized steel pipe can be made of zinc layer weight determination, the average value should not be less than 500g/ m2, any sample should not be less than 480g/ m2.

The main products are: cold drawn seamless steel tube, large diameter thick wall seamless steel tube, medium and low pressure furnace seamless steel tube, fluid conveying seamless steel tube, seamless steel tube for institutions, construction and other large series of seamless steel tube.Seamless steel tube can be produced according to GB, ASTM, API5L, DIN, JIS and other standards. Standard has: Japan JIS G3444 G3445, G3454, G3456, G3461 etc.! Material include: 10 #, 20 #, 45 #, Q345, ST35.8, ST37, ST42, ST52, A53, A106, A179, A192, API5L/GR. B - X52, J55, K55, N80, etc!

JIS STK500 galvanized steel pipes： STK500 is a Japanese material brand, and its mechanical properties are as follows: tensile strength N/mm 500 yield N/mm 355. Japanese industrial standard for carbon steel tubes used in earthwork, construction, scaffolding, piles, and other installations. Hot-dipped galvanized : Durability: in a suburban environment, the standard galvanized rustproof thickness can be maintained for more than 50 years without repair;In urban or offshore areas, the standard hot dip galvanized rust barrier can be maintained for 20 years without repair;

Galvanized steel pipes have nice performance in anti-corrosion. Gi pipe can be divided into hot galvanized and pre galvanized mainly. Hot galvanized pipe is thick in galvanization layer, so it behaves much well in corrosion resistant. While pre galvanized pipe is much economical. Surface quality of galvanized steel pipe should have a complete galvanized layer, there should be no unplated black spot, there is not much rough surface and the existence.

Galvanized steel pipe with hot dip or electric galvanized coating.Galvanizing can increase the corrosion resistance of steel pipe and prolong its service life.Galvanized steel pipe USES is very wide, in addition to a general low pressure fluid such as water, gas, oil line pipe, also used as oil industry, especially the ocean oil field oil well pipe, oil pipe, chemical coking equipment of oil heater, the condensing, exchange of coal distillation wash oil cooler for tube, and trestle pile, mining tunnel supporting frame tube, etc.Hot dip galvanized steel pipe is widely used in all kinds of modern manufacturing industry.

BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.

As we know, if the surface of steel tube is not processed, it will be easy to rust and corrosion, which will affect its service life and appearance. Therefore, the surface of steel tube is usually galvanized. Hot-dip galvanized pipe is widely used, it is usually made of hot-dip galvanized square pipe, hot-dip galvanized Angle steel, hot-dip galvanized channel steel, hot-dip galvanized square rectangular pipe, hot-dip galvanized round steel and hot-dip galvanized welded steel and other categories and specifications。

the thread treatment began, after the completion of steel tube galvanized threaded processing business, the thread processing is a professional lathe processing and become, for taper thread pitch buckle type, such as common standards with British standard gb, on both ends of seamless steel tubes for car, silk thread thread test data processing is clean, and then adding pipe hoop, end with plastic cap protector.Galvanized steel wire turning steel pipe, divided into American standard turning steel pipe and British standard turning steel pipe, there are one inch eight teeth and ten teeth

After the completion of steel tube galvanized threaded processing business, the thread is a professional lathe machining, require taper thread pitch buckle type, such as common standards with British standard gb, on both ends of seamless steel tubes for car, silk thread thread test data processing is clean, and then adding pipe hoop, end with plastic cap protector.Galvanized steel wire turning steel pipe, divided into American standard turning steel pipe and British standard turning steel pipe,