Alloy seamless steel pipe

Seamless steel pipes are perforated from whole round steel, and steel pipes without welds on the surface are called seamless steel pipes. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and top pipes. According to the cross-sectional shape, seamless steel pipes are divided into two types: round and special-shaped. Special-shaped pipes have square, elliptical, triangular, hexagonal, melon-shaped, star-shaped, and finned pipes. The maximum diameter is 900mm and the minimum diameter is 4mm. According to different uses, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes. Seamless steel pipes are mainly used as petroleum geological drilling pipes, petrochemical cracking pipes, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation.

The Chinese name of seamless steel tube, the foreign name of Seamless steel tube, is the role of fluid transportation. There are no joints on the surface. Standing resources are made of 10#, 20#, 35#, 45#, 16Mn classification. Round and special-shaped disciplines. Steel rolling technology is also called small-diameter seamless steel pipe. Large-diameter seamless steel pipe, thick-walled steel pipe
The requirements of the catalogue are generally realized by controlled rolling and cooling, that is, controlling the start-rolling temperature and final rolling temperature of finishing rolling. Round tube billet→heating→piercing→heading→annealing→pickling→oiling (copper plating)→multi-pass Secondary cold drawing (cold rolling) → billet tube → heat treatment → straightening → hydraulic test (flaw detection) → marking → warehousing.

Standard sizes:

8×2-3-

10×2-3-3.5

12×2-3-3.5

14×2-3-3.5

16×2-3-3.5-4-5-6

18×2-3-3.5-4-5-6

20×2-3-3.5-4-5-6

22×2-3-3.5-4-5-6

25×2-3-3.5-4-5-6

28×2-3-3.5-4-5-6

30×2-3-3.5-4-5-6

32×2-3-3.5-4-5-6

35×2-3-3.5-4-5-6

38×2-3-3.5-4-5-6

42×2-3-3.5-4-5-6-8-10-12

45×2-3-3.5-4-5-6-8-10-12

48×2-3-3.5-4-5-6-8-10-12

51×2-3-3.5-4-5-6-8-10-12

57×2-3-3.5-4-5-6-8-10-12-14

60×2-3-3.5-4-5-6-8-10-12-14

63×2-3-3.5-4-5-6-8-10-12-14

73×2-3-3.5-4-5-6-8-10-12-14-16

76×2-3-3.5-4-5-6-8-10-12-14-16

83×2-3-3.5-4-5-6-8-10-12-14-16 -18-20

89×4-6-8-10-12-14-16-18-20-22-25

95×3-3.5-4.5-5-6-8-10-12-14-16-18-20-25

102×3-3.5-4.5-5-6-8-10-12-14-16-18-22-25-30

108×3-3.5-4.5-5-6-8-10-12-14-16-18-20-22-25

114×3-3.5-4.5-5-6-8-10-12-14-16-18-22-25

121×3-3.5-4.5-5-6-8-10-12-14-16-18-20

127×4.5-5-6-8-10-12-14-16-18-20

133×4-5-6-8-10-12-14-16-18-20-22-25-28-30-32-35-40

140×6-8-10-12-14-16-18-20-22-25-28-30-32-35-40

152×6-8-10-12-14-16-18-20-22-25-28-30-32-35-40-50

159×4.5-5-6-8-10-12-14-16-18-20-22-25-30-35-38-40-45

168×5-6-8-10-12-14-16-18-20-22-25-28-30-35-38-40-45-50

180×5-6-8-10-12-14-16-18-20-22-25-28-30-32-35-38-40-45-50-55

194×6-8-10-12-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50

203×6-8-10-12-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60

219×6-7-8-10-12-14-16-18-20-22-25-28-30-32-35-38-40-45-50-55-60

232×14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60

245×8-10-12-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60

273×6-8-10-12-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60

299×8-10-12-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60-65-70-75

325×9-10-11-12-13-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60-65-70-75-80

351×10-12-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60-65-70-75

356×8-10-12-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60-65-70-75-80

377×8-10-12-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60-65-70-75-80

402×12-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60-65-70-75-80

426×8-10-12-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60-65-70-75-80

480×10-12-14-16-18-20-22-25-28-30-32-35-38-40-42-45-50-55-60-65-70-75-80

508×10-12-14-16-18-20-22-25-28-30-32-35-38-40-45-50-55-60-65-70

530×12-14-16-18-20-22-25-28-30-32-35-38-40-45-50-55-60-65-70

610×30-35-40-45-50-55-60-65-70-75-80

630×30-35-38-40-45-50-55-60-65-70-75-80