Seamless steel pipe for fluid transportation

Keywords: seamless steel pipe for fluid
Fluid seamless steel pipe is a kind of steel pipe used for fluid transportation.
A seamless steel pipe for fluid (fluid pipe) is a steel pipe with a hollow section and no welds from the beginning to the end. It is mainly used for conveying fluid pipelines in engineering and large-scale equipment.

Fluid seamless pipe production process:

Round tube billet→heating→piercing→three-roll skew rolling, continuous rolling or extrusion→tube removal→sizing (or reducing)→cooling→billet tube→straightening→hydraulic test (or flaw detection)→marking→warehousing .

Due to its low cost and high strength, fluid seamless pipes are widely used in fluid transportation in modern society. The fluid seamless pipe can also carry out anti-corrosion and thermal insulation treatment on the surface according to the needs of use conditions and actual construction conditions.
The length of the fluid seamless pipe can be made according to the needs of customers, the general length is between 6 and 12 meters, and the export steel pipe is within 6 meters. The fluid seamless pipe at the outlet also needs to be grooved, painted and capped.

The difference between structural seamless steel pipe and fluid seamless steel pipe:

Structural seamless steel pipe, this standard is applicable to seamless steel pipe for general structure and mechanical structure, and fluid seamless steel pipe standard is applicable to general seamless steel pipe for conveying fluid. The main difference between it and the structural seamless steel pipe is that the fluid seamless steel pipe is subjected to hydraulic test one by one or ultrasonic, eddy current and magnetic flux leakage inspection. Therefore, in the standard selection of pressure pipeline steel pipes, fluid seamless steel pipes should be used.

Manufacturing method:
① Generally, the temperature of boiler tubes is below 450 °C, and domestic tubes are mainly made of No. 10 and No. 20 carbon steel hot-rolled tubes or cold-drawn tubes.
② High-pressure boiler tubes are often used in high temperature and high pressure conditions, and the tubes will be oxidized and corroded under the action of high-temperature flue gas and water vapor. The steel pipe is required to have high lasting strength, high oxidation corrosion resistance, and good organizational stability.

Application:
①General boiler tubes are mainly used to manufacture water wall tubes, boiling water tubes, superheated steam tubes, superheated steam tubes for locomotive boilers, large and small smoke tubes and arch brick tubes, etc.
②High-pressure boiler tubes are mainly used to manufacture superheater tubes, reheater tubes, gas guide tubes, main steam tubes, etc. of high-pressure and ultra-high-pressure boilers.