News

To further standardize production standards, clarify product processing ranges, and improve the accuracy of customer product selection and order fulfillment, Dayang Steel Pipe Group is hereby uniformly publishing the specification ranges and parameters for the company’s four main production lines. The parameters disclosed in this announcement cover the outer diameter processing ranges, corresponding wall thickness ranges, round bar cutting lengths, and billet production lengths for each production line. All data is accurate and valid, serving as an official reference for product customization, technical coordination, and order scheduling.

I. Riton 76 Medium- and Thick-Wall Production Line

Applicable Scenarios: Custom Manufacturing of Small- and Medium-Diameter, Medium-Thick-Walled Seamless Steel Pipes

Cutting Length of Round Bar: 2.0 m–3.4 m

Tube Blank Production Length: 6.1 m–11.5 m

Outer Diameter and Corresponding Wall Thickness Parameters：

• Outer diameters: 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 diameters: 60 mm, 63.5 mm, 65 mm, 68 mm; wall thickness: 8 mm–20 mm
• Outer diameters: 70 mm, 73 mm, 76 mm; wall thickness: 7 mm–22 mm
• Outer diameters: 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- and Thick-Wall Production Line

Applicable Scenarios: Mass Production of Medium- and Large-Diameter, Medium- and Thick-Walled Seamless Steel Pipes

Cutting Length of Round Bar: 1.8 m–4.5 m

Tube Blank Production Length: 8.2 m–12.5 m

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 diameters: 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

Applicable Scenarios: Precision Manufacturing of Large-Diameter, Thin-Walled, and Standard-Wall-Thickness Seamless Steel Pipes

Cutting Length of Round Bar: 1.7 m–3.5 m

Tube Blank Production Length: 9.5 m–12.6 m

Outer Diameter and Corresponding Wall Thickness Parameters：

• Outer diameters: 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 diameters: 127 mm, 133 mm, 140 mm; wall thickness: 8 mm–14 mm
• Outer diameter: 152 mm; wall thickness: 7 mm–14 mm
• Outer diameters: 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- and Thick-Wall Production Line

Applicable Scenarios: High-end custom manufacturing of large-diameter, thick-walled, and extra-thick-walled seamless steel pipes

Cutting Length of Round Bar: 2.5 m–6.0 m

Tube Blank Production Length: 9.0 m–16.0 m

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 diameters: 325 mm, 351 mm, 356 mm, 377 mm; wall thickness: 20 mm–100 mm
• Outer diameters: 402 mm, 406 mm, 426 mm; wall thickness: 25 mm–120 mm
• Outer diameter 457 mm: Wall thickness 25 mm–120 mm
• Outer diameters: 480 mm, 508 mm, 530 mm; wall thickness: 25 mm–120 mm

V. Notice on the Public Announcement

1. All units of measurement in this notice are as follows: outer diameter and wall thickness are in millimeters (mm); the cut-to-length of round bar and the length of tube blanks are in meters (m).

2. The parameters for each unit fall within the standard production range; special specifications and wall thicknesses can be custom-manufactured following a technical evaluation based on customer requirements.

3. This parameter announcement represents the company’s latest official production standards; all production, quotations, and technical coordination shall be based on this version.

Ocean Steel Pipe Group

Official Announcement