ASTM A1097/A1097M-22 PDF

Overview

ASTM A1097/A1097M-22 is the international standard specification for carbon steel electric-fusion (arc)-welded casing pipe in sizes NPS 10 (10 in./254 mm outside diameter) and larger, with wall thickness of 0.200 in. (5.1 mm) or greater. Developed by ASTM International, this standard establishes minimum requirements for the manufacture, testing, inspection, and delivery of steel casing pipe intended for use as casing or encasement in horizontal underground boring, tunneling, or open trench applications. The standard applies to both straight seam and spiral seam welded pipe and allows for both inch-pound and SI units for international compatibility.

Key Topics

• Pipe Sizes and Wall Thickness

  • Nominal Pipe Size (NPS) 10 (10 in./254 mm) and larger
  • Minimum wall thickness of 0.200 in. (5.1 mm)
  • Custom dimensions may be specified if other requirements are met

• Manufacturing Requirements

  • Electric-fusion (arc)-welded process for straight seam or spiral seam pipes
  • Welds must be complete penetration butt joints
  • Acceptable steel materials include those conforming to several ASTM standards (e.g., A36, A515, A516, A572, A1011, A1018)

• Testing and Inspection

  • Mechanical testing per ASTM A370
  • Reduced-section weld tension tests for each lot of pipe
  • Thorough inspection for surface imperfections, roundness, straightness, and wall thickness
  • Inspection and rejection criteria ensure only compliant pipes are supplied

• Pipe Ends and Marking

  • Options for plain, beveled, or interlocking joint ends
  • Each pipe length must be clearly marked with the manufacturer, size, wall thickness, length, minimum yield strength, and specification designation

• Documentation and Certification

  • Certification of compliance and test reports are furnished when specified by the purchaser

Applications

Steel casing pipe produced to the ASTM A1097/A1097M-22 standard is essential in a variety of infrastructure and utility projects requiring robust, reliable encasement in underground construction. Key applications include:

• Horizontal Directional Drilling (HDD): Protection of boreholes during trenchless installation of utilities crosses roads, railroads, waterways, or other obstructions.
• Tunneling and Boring: Providing structural support and protecting conduits, cables, or fluids in tunnel construction and large-diameter boring operations.
• Open Trench Installations: Casing or encasement of pipelines in open cut trenches for water, sewage, oil, gas, and utility lines.
• Pipeline Protection: Serving as sleeving or encasement to shield pipelines from external forces, corrosion, or soil movement.

The specification ensures products meet stringent performance and durability criteria for demanding field environments.

Related Standards

Several ASTM and industry standards complement or reference ASTM A1097/A1097M-22. Key related documents include:

• ASTM A36/A36M - Carbon Structural Steel
• ASTM A515/A515M - Pressure Vessel Plates, Carbon Steel
• ASTM A516/A516M - Pressure Vessel Plates, Carbon Steel (Moderate/Lower Temperature Service)
• ASTM A572/A572M - High-Strength Low-Alloy Structural Steel
• ASTM A1011/A1011M, A1018/A1018M - Hot-Rolled Steel Sheets and Strips
• ASTM A370 - Mechanical Testing of Steel Products
• AWS D1.1/D1.1M - Structural Welding Code – Steel

This network of referenced specifications ensures material compatibility, manufacturing quality, and rigorous mechanical performance for steel casing pipe used in critical civil engineering applications.

Keywords: ASTM A1097, steel casing pipe, carbon steel, electric-fusion arc welded, large diameter pipe, underground casing, tunneling pipe, bore casing, welded steel pipe, pipeline protection, casing standards, trenchless construction