Anuncio sobre los parámetros técnicos de las unidades de producción del Grupo Dayang Steel Pipe

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To further standardize production criteria, clarify product processing scope, and improve the accuracy of customer model‑selection and order docking, Dayang Steel Pipe Group hereby issues a unified announcement on the processing specification range parameters of the Group’s four main production units. The announced parameters cover the outer‑diameter processing range, corresponding wall‑thickness intervals, round‑steel blanking length and tube‑blank production length of each unit. All data are authentic and valid, serving as official basis for product customization, technical communication and order scheduling.

I. Ritong 76 Medium‑heavy Wall Unit

Application Scenario: Custom production of small‑and‑medium‑diameter seamless steel pipes with medium‑heavy walls

  • Round‑steel blanking length: 2.0m‑3.4m
  • Tube‑blank production length: 6.1m‑11.5m

Outer‑diameter and corresponding wall‑thickness parameters:

  • Outer diameter 48 mm, 50 mm, 51 mm, 54 mm: Wall thickness 8 mm‑16 mm
  • Outer diameter 57 mm: Wall thickness 8 mm‑18 mm
  • Outer diameter 60 mm, 63.5 mm, 65 mm, 68 mm: Wall thickness 8 mm‑20 mm
  • Outer diameter 70 mm, 73 mm, 76 mm: Wall thickness 7 mm‑22 mm
  • Outer diameter 80 mm, 83 mm, 89 mm, 95 mm: Wall thickness 7 mm‑25 mm
  • Outer diameter 102 mm, 108 mm: Wall thickness 8 mm‑14 mm

II. Kehuan 219 Medium‑heavy Wall Unit

Application Scenario: Mass production of medium‑and‑large‑diameter seamless steel pipes with medium‑heavy walls

  • Round‑steel blanking length: 1.8m‑4.5m
  • Tube‑blank production length: 8.2m‑12.5m

Outer‑diameter and corresponding wall‑thickness parameters:

  • Outer diameter 73 mm, 76 mm: Wall thickness 14 mm‑22 mm
  • Outer diameter 80 mm, 83 mm: Wall thickness 14 mm‑25 mm
  • Outer diameter 89 mm, 95 mm: Wall thickness 14 mm‑30 mm
  • Outer diameter 102 mm: Wall thickness 12 mm‑32 mm
  • Outer diameter 108 mm: Wall thickness 12 mm‑35 mm
  • Outer diameter 114 mm, 121 mm: Wall thickness 14 mm‑35 mm
  • Outer diameter 127 mm, 133 mm, 140 mm, 146 mm: Wall thickness 16 mm‑40 mm
  • Outer diameter 152 mm: Wall thickness 14 mm‑45 mm
  • Outer diameter 159 mm, 180 mm: Wall thickness 18 mm‑50 mm
  • Outer diameter 194 mm, 203 mm: Wall thickness 18 mm‑30 mm

III. Kehuan 159 Medium‑thin Wall Unit

Application Scenario: Refined production of medium‑and‑large‑diameter seamless steel pipes with thin and conventional walls

  • Round‑steel blanking length: 1.7m‑3.5m
  • Tube‑blank production length: 9.5m‑12.6m

Outer‑diameter and corresponding wall‑thickness parameters:

  • Outer diameter 95 mm, 102 mm, 108 mm: Wall thickness 8 mm‑10 mm
  • Outer diameter 114 mm, 121 mm: Wall thickness 8 mm‑12 mm
  • Outer diameter 127 mm, 133 mm, 140 mm: Wall thickness 8 mm‑14 mm
  • Outer diameter 152 mm: Wall thickness 7 mm‑14 mm
  • Outer diameter 159 mm, 168 mm, 180 mm, 194 mm, 203 mm: Wall thickness 6 mm‑16 mm
  • Outer diameter 219 mm: Wall thickness 6 mm‑18 mm

IV. Dayang 508 Medium‑heavy Wall Unit

Application Scenario: High‑end custom production of large‑diameter, heavy‑wall and extra‑heavy‑wall seamless steel pipes

  • Round‑steel blanking length: 2.5m‑6.0m
  • Tube‑blank production length: 9.0m‑16.0m

Outer‑diameter and corresponding wall‑thickness parameters:

  • Outer diameter 180 mm: Wall thickness 20 mm‑60 mm
  • Outer diameter 194 mm, 203 mm: Wall thickness 20 mm‑65 mm
  • Outer diameter 219 mm: Wall thickness 20 mm‑70 mm
  • Outer diameter 245 mm, 254 mm: Wall thickness 20 mm‑80 mm
  • Outer diameter 273 mm: Wall thickness 20 mm‑80 mm
  • Outer diameter 299 mm: Wall thickness 20 mm‑90 mm
  • Outer diameter 325 mm, 351 mm, 356 mm, 377 mm: Wall thickness 20 mm‑100 mm
  • Outer diameter 402 mm, 406 mm, 426 mm: Wall thickness 25 mm‑120 mm
  • Outer diameter 457 mm: Wall thickness 25 mm‑120 mm
  • Outer diameter 480 mm, 508 mm, 530 mm: Wall thickness 25 mm‑120 mm

V. Announcement Notes

  1. Units for all parameters in this announcement: Outer diameter and wall thickness in millimeters (mm); round‑steel blanking length and tube‑blank length in meters (m).
  2. The parameters of each unit represent standard production ranges. Special specifications and special wall thicknesses can be custom‑processed upon technical evaluation according to customer requirements.
  3. This parameter announcement represents the Group’s latest official production standard, and all production, quotation and technical communications shall be subject to this version.
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Dayang Steel Pipe Group

Official Announcement