Steel pipes are classified according to classification purposes

1. Pipes for pipes. Such as: seamless pipe for water, gas pipe, steam pipe, oil transmission pipe, oil and natural gas trunk pipe. Agricultural irrigation water faucet with pipe and sprinkler irrigation pipe.
2. Pipe for thermal equipment. Such as boiling water pipe, superheated steam pipe for general boilers, superheating pipe for locomotive boilers, large smoke pipe, small smoke pipe, arch brick pipe and high temperature and high pressure boiler pipe.
3. Pipe for machinery industry. Such as aviation structure tube (round tube, oval tube, flat oval tube), automobile axle tube, axle tube, automobile tractor structure tube, tractor oil cooler tube, agricultural machinery square tube and rectangular tube, transformer tube and bearing tube.
4. Pipe for petroleum geological drilling. Such as: oil drilling pipe, oil drill pipe (kelly pipe and hexagonal drill pipe), drilling stick, oil tubing, oil casing and various pipe joints, geological drilling pipe (core pipe, casing, active drill pipe, drill stick, press hoop and pin joint, etc.).
5. Tubes for chemical industry. Such as: petroleum cracking pipe, chemical equipment heat exchanger and pipeline pipe, stainless acid resistant pipe, high pressure pipe for fertilizer and pipe for conveying chemical media.
6. Other departments use tubes. Such as: container tube (high-pressure gas cylinder tube and general container tube), instrument tube, watch case tube, syringe needle and medical equipment tube.