1. Seamless steel pipes can be divided into: hot -rolled seamless pipes, cold pull tubes, precision steel pipes, hot dilation pipes, cold rotation tubes and extrusion tubes.

Seamless steel pipes are made of high -quality carbon steel or alloy steel, which are divided into hot and cold rolling (pull).

2. Welded steel pipes are divided into furnace welding pipes, welding welding pipes and automatic arc welded pipes due to their welding processes. Due to the different welding forms, they are divided into two types of straight welded pipes and spiral welded pipes. It is a circular welded pipe and a heterogeneous (square, flat, etc.) welded pipes.

The welded steel pipe is welded by the steel plate rolled into a tube -shaped steel plate. In the manufacturing method, it is divided into low -voltage fluid conveyor welding steel pipes, spiral joint welding steel pipes, direct rolling steel pipes, and electric welded pipes. Seamless steel pipes can be used for liquid pressure pipes and gas pipelines in various industries. The welding pipe can be used for water recovery pipes, gas pipes, heating pipes, and electrical pipelines.

Carbon pipes can be divided into ordinary carbon steel pipes and high -quality carbon structure pipes.

Alloy tubes can be divided into: low alloy pipes, alloy structure tubes, high alloy pipes, and high -intensity pipes. Bearing tube, heat -resistant acid -resistant stainless tube, precision alloy (such as linter alloy) tube, and high -temperature alloy tube.

The plating pipes include galvanized pipes, aluminum -plated pipes, chrome plating pipes, aluminum pipes, and other alloy layers.

1. Pipe pipes. Such as: water, gas pipe, steam pipeline, seamless pipes, petroleum conversion pipes, and oil -natural gas trunk pipes. Agricultural irrigation faucet tubes and spray irrigation pipes.

2. Tube of heat workers. Such as the boiling water pipe and overheating steam pipe for general boiler, the overheating pipe, large tobacco pipe, small tobacco pipe, arched brick tube, and high -temperature high -pressure boiler tube for the wheel boiler.

3. Machinery industry tube. Such as aviation structure tube (round tube, ellipse tube, flat ellipse tube), automobile semi -axis tube, car shaft tube, car tractor structure tube, tractor oil cooler tube, square tube and rectangular tube, transformer tube, shaft bearing bearing Tube and so on.

4. Petroleum geological drilling tube. Such as: petroleum drill pipe, petroleum drill rod (square drilling pole and hexagonal drilling pole), drilling, petroleum pipes, petroleum sleeves and various pipe joints, geological drill tube , Press the hoop and sales joint).

5. Chemical industry tube. Such as: petroleum cracking tube, chemical equipment thermal exchangers and pipelines, stainless acid pipes, high pressure pipes for chemical fertilizers, and transportation of chemical medium.

6. Other departments use tube. Such as: container pipes (high -pressure gas cylinders and general containers), instrumental pipes, watch shell pipes, injection needles and medical device pipes.