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D2661-24 – Standard Test Method Technical Guide
ASTM Designation D2661−24 establishes the standard specification for Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40 plastic pipe and fittings utilized in drain, waste, and vent (DWV) applications. This American National Standard, approved for use by U.S. Department of Defense agencies, covers single and coextruded ABS pipe made to Iron Pipe Sizes (IPS) and sets forth rigorous requirements for materials, dimensions, and performance characteristics.
📐 Scope and Material Composition
The scope of this standard strictly defines acceptable materials. Only virgin ABS plastic, as defined in Section 3.2.2, and ABS rework plastic that satisfies the provisions of Section 5.3 are permitted. The standard explicitly prohibits reprocessed or recycled plastic as defined in Terminology D883. All coextruded layers must also meet the base material requirements of Section 5. The material basis for this specification is Classification System D3965 for Rigid ABS Materials for Pipe and Fittings.
⚠️ Material Compliance Mandate: D2661-24 completely excludes reprocessed and recycled plastics. Certification of compliance depends on strict material traceability demonstrating that only virgin and specific compliant rework ABS materials are used.
📏 Dimensional Specifications and Test Methods
Pipe produced under this standard must conform to Schedule 40 Iron Pipe Sizes (IPS). Dimensional verification is conducted in accordance with Test Method D2122. Inch-pound units are regarded as the standard, with SI values provided as mathematical conversions for information only (Section 1.7). Fittings must meet the patterns detailed in Specification D3311 and the specific requirements of Annex A1. The table below summarizes the core technical parameters and their governing standards.
| 🟦 Specified Requirement | 📏 Method / Standard | 🎯 Governing Section |
|---|---|---|
| Pipe Dimensions & Tolerance | Schedule 40 IPS (Test Method D2122) | Section 1.1, D2122 |
| Fitting Pattern Design | DWV Patterns (Specification D3311) | Annex A1, D3311 |
| Material Classification | Rigid ABS (Classification System D3965) | Section 5, D3965 |
| Solvent Cement | ABS Cement (Specification D2235) | Section 2.1, App. X2 |
| Mechanical Performance | Pipe Stiffness (D2412) & Impact Resistance (D2444) | Section 2.1 |
⚙️ Installation Practices and Jointing Procedures
The specification provides extensive non-mandatory guidance for storage (Appendix X1), joining (Appendix X2), and installation (Appendix X3). For robust joints, solvent cement meeting D2235 must be used for all connections. Safe handling of solvent cements and primers is governed by Practice F402. For underground installations, Practice D2321 provides the recommended installation methodology for gravity-flow applications.
💡 Best Practice for Jointing: Always use an ASTM D2235 compliant ABS solvent cement. Follow the procedural guidance in Appendix X2 and Practice F402, paying close attention to temperature, joint fit, and cure time to ensure maximum joint strength and system integrity.
❓ Frequently Asked Questions
🔍 What types of ABS material are permitted under D2661-24?
Only virgin ABS plastic, as defined in Section 3.2.2, and