Some Questions And Answers About Seamless Steel Pipe

                    Released on Sep. 19 , 2019

                    Today as a professional Seamless Steel Pipe Supplier, we would like to introduce you some basic knowledge about seamless steel pipe.


                    Seamless Steel Pipes

                    Seamless Steel Pipes


                    1. What types of seamless steel pipes can be classified according to production methods?

                    According to the production method, the seamless steel tubes can be divided into hot-rolled tubes, cold-rolled tubes, twisted tubes, extruded tubes, and the like.


                    2. What types of seamless steel pipes are classified according to their shape?

                    The seamless steel tubes are classified into circular tubes and shaped tubes according to their shape. In addition to the square tube and the rectangular tube, the special-shaped tube has an elliptical tube, a semi-circular tube, a triangular tube, a hexagonal tube, a convex-shaped tube, a plum-shaped tube.


                    3. What types of Seamless Steel Pipes are classified according to materials?

                    According to different materials, it is divided into ordinary carbon structural tube, low alloy structural tube, high-quality carbon structural tube, alloy structural tube, stainless steel tube and so on.


                    4. What types of seamless steel pipes are classified according to their purposes?

                    According to special purposes, there are boiler tubes, geological tubes, oil pipes, etc.


                    5. What is the meaning of the PQF and other English descriptions of steel pipes?

                    MPM one-stop mandrel rolling mill

                    MINI-MPM one less frame limit mandrel rolling mill

                    PQF one-stop mandrel three-roll continuous rolling mill

                    CPE one seamless pipe pipe jacking machine


                    6. What is an oil well pipe?

                    Oil well pipe refers to the pipe used for oil and natural gas drilling, including drill pipe, casing and oil pipe.


                    7. What is the conveying pipe?

                    The national standard adopted for the conveying pipe is: GB/T8163-1999, which is used to transport liquid and some solids. Including oil, natural gas, water gas pipelines, and coal, ore, grain transport pipes, etc., representing materials such as No. 20 steel, Q345 alloy steel, etc.


                    8. What is a structural tube?

                    The national standard for structural pipes is: GB/T8162-1999, structural pipes are used to make various machine parts and structure frames. Including bicycle tubes, pipe piles, various structural parts and bearing tubes, etc., the representative materials are carbon steel, 20, 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30 ~ 35CrMo, 42CrMo and so on.


                    9. What is the heat exchange tube?

                    It refers to seamless steel tubes for low and medium pressure boilers (GB3087 1999), representing materials of No. 10 and No. 20 steel; seamless steel tubes for high pressure boilers (GB5310-1995), representing materials of 20G, 12Cr1MoVG, 15CrMoG, etc. Such pipes are heat exchanged through the pipe wall, including boiler pipes, heat exchanger pipes, and the like.


                    10. How are the specifications of seamless steel pipes marked?

                    The specification of steel pipe is expressed by the nominal size of outer diameter, wall thickness and length. For example, (1) hot-rolled steel pipe, outer diameter and wall thickness are ordinary precision.

                    The outer diameter of 76mm, the wall thickness of 3.5mm and the length of 3000 times are expressed as: 10-76X3. 5X 3000 times GB3087-1999; (2) cold-rolled (drawn) steel pipe, the outer diameter is high precision, The wall thickness is of ordinary grade accuracy, and the outer diameter is 76 mm, the wall thickness is 3.5 mm, the length is 5000 mm, and the mark is: cold 10-76 high X 3.5X 5000-GB3087-1999.


                    11. How is the steel tube unit named?

                    The types of units that produce steel pipes are varied. The specific name of the hot rolling mill is indicated by the type of the unit and the type of mill. For example, our factory 460PQF limited mandrel rolling mill unit, of which 460 means that the largest specification outer diameter of the steel tube can be produced by the unit is 460mm, and the rolling mill is in the form of a limiting mandrel mill.


                    Our company has P11 Seamless Steel Pipe. If you want to learn more information about the products, feel free to contact us.


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