1. Different formation methods

1) Seamless steel pipe: a steel pipe made of a single piece of metal with no seams on the surface.

2)Welded steel pipes: steel strips or steel plates that are bent and deformed into round or square shapes and then welded into steel pipes with seams on the surface.

 

2.the characteristics are different

1) Seamless steel pipe: the maximum diameter is 650mm, and the minimum diameter is 0.3mm. According to different purposes, there are thick-walled pipes and thin-walled pipes.

2) Welded steel pipes: T-welded steel pipes have strong corrosion resistance in acidic environments when they contain Ni. In environments containing sulfuric acid or hydrochloric acid, the higher the Ni content in the T-welded steel pipes, the stronger the corrosion resistance. Under normal circumstances, only adding Cr to the T-welded steel pipe can prevent corrosion.

 

3. different usage

1) Seamless steel pipes: seamless steel pipes are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemicals, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation.

2) Welded steel pipes: electric welded steel pipes are used in oil drilling and machinery manufacturing, etc.; furnace welded pipes can be used as water gas pipes, etc., large-diameter longitudinally welded pipes are used for high-pressure oil and gas transportation, etc.; spiral welded pipes are used for oil and gas transportation, pipe piles, bridge piers, etc. .

Do you choose a welded steel pipe? Or do you choose one of their seamless counterparts?

Pls make a choice according to your requirement.

Hebei Tubo Machinery Co.,Ltd., manufactures and exported to over 30 countries of Welding Pipe Machine,Metal Pipe Machine,Pipe Mill Machine,ERW Tube Mill, Tube end Forming Machine,Carbon Steel Tube Mill,Structural Pipe Machine.,as well as auxiliary equipment for more than 15 years.

TUBO Machinery, as a partner of users, provides not only high precision machine products, but also technical support everywhere & anytime. 

We professional in Pipe Making Machine for more than 15 years experience.

We can help factory of steel pipe solve all difficult.