GB/T 30062-2013Terminology of steel pipes and tubes (English PDF)

2.1 General terms

2.1.1 Pipe steelpipe (steeltube)

Open at both ends and having a hollow closed section, and the length and cross-section of a steel product typically has a circumference greater proportion.

NOTE. In the power piping, process piping and pipeline applications, the use of internal and external heat exchange medium pipe commonly used "tube", such as boiler water-cooled

Wall tubes, superheater tubes, reheater tubes; medium conveying pipe applications typically use "pipe", such as steel transport oil and gas, steam, water and other fluid medium tube. In other applications, "tube" and "pipe" is used in general no distinction.

2.1.2 Tube pipebody

For welded steel pipe, steel pipe means does not include the entire weld and heat affected zone; other pipe, refers to the entire steel pipe.

2.1.3 Tube end pipeend

From the tip ends of the provisions of section steel pipe or pipe segment length range. Different standards for the length of the pipe end may have different requirements.

2.2 by manufacturing methods classification

2.2.1 Seamless steel pipe

Using perforated billet, or perforation after rolling (drawing, extruding, expanding the system, the top pressure, forging), or a method of manufacturing a forged machining without welding

Seam pipe.

2.2.1.1

Hot-rolled (extrusion, top, forging, expansion) seamless steel pipe hotroled (extruded, upset, forged, expanded) seamlesssteelpipe

Use in the recrystallization temperature above the final rolling (extrusion, top pressure, forging, expanding system) deformation pressure processing method for producing seamless steel tubes.

2.2.1.2 Cold drawn (rolled, spinning) seamless steel pipe colddrawn (roled, spun)

Carried out at the factory using ambient temperature of the final drawing mill (rolling, spinning) deformation pressure processing method for producing seamless steel tubes.

2.2.1.3 Boring seamless steel forging

After the tube by forging using drill boring molding method for manufacturing a seamless steel pipe.

2.2.2 Welded steel pipe

Plate or strip Edge pressure is mechanically crimped and welded together forming (the term commonly used welding method, see Appendix A) is made with a welding

Seam steel pipe, referred to as pipe.