A seamless steel pipe, which is made of whole metal and has no joints on the surface, is called seamless steel pipe. According to the production method, seamless tubes are divided into hot rolled tubes, cold rolled tubes, cold drawn pipes, extruded pipes, pipe jacking, etc. According to the cross-section shape, seamless steel pipe is divided into circular and special-shaped two kinds, special-shaped pipe has square, elliptical, triangular, hexagonal, melon seed, star, with finned tube a variety of complex shapes. The maximum diameter is 650 mm and the minimum diameter is 0.3 mm. According to different uses, there are thick walled tubes and thin walled tubes. Seamless steel pipe is mainly used for petroleum geological drilling pipe, Petrochemical cracking pipe, boiler pipe, bearing pipe and automobile, tractor, aviation high-precision structural steel pipe.
Specification Description
Chinese
English
Outside Diameter
Wall Thickness
Outside Diameter
Wall Thickness
21mm-1016mm
2mm-100mm
3/8 to 40inch
SCH40 to XXS
Material and Standard
Item
Chinese Standard
American Standard
German Standard
1)
10#
A53A
St37
A106A
St37-2
DIN17175
A179C
St35.8
DIN1629
2)
20#
ASTMA106-B
St45-8
DIN17175
ASTMA53-B
St42-2
DIN1626
ASTMA178-C
St45-4
DIN1629
3)
45#
ASTMA1045
CK45
4)
16Mn
ASTMA210-C
St52
DIN1629/3
St52.4
DIN1629/4
5)
37Mn5
J55
Note
1)Packing
Paint on the pipe and plastic covers at the ends
2)Paymnet
T/T or L/C
3)Use Place
Structure ,Transport gas and oil ,making machine part and so on
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