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 (или уменьшение)→cooling→billet tube→straightening→hydraulic test (или дефектоскопия)→маркировка→складирование .
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 а также 12 метры, and the export steel pipe is within 6 метры. 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:
Конструкционная бесшовная стальная труба, 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. Основное различие между ним и конструкционной бесшовной стальной трубой заключается в том, что жидкая бесшовная стальная труба подвергается гидравлическим испытаниям один за другим или ультразвуковым испытаниям., вихретоковый контроль и контроль рассеяния магнитного потока. Следовательно, в стандартном выборе стальных труб напорного трубопровода, fluid seamless steel pipes should be used.
Способ изготовления:
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, а трубы будут окисляться и корродировать под действием высокотемпературных дымовых газов и паров воды. Стальная труба должна иметь высокую прочность., высокая стойкость к окислению и коррозии, и хорошая организационная стабильность.
Заявление:
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, так далее.
②High-pressure boiler tubes are mainly used to manufacture superheater tubes, трубы подогревателя, газовые направляющие трубки, главные паровые трубы, так далее. of high-pressure and ultra-high-pressure boilers.