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D1527-99 – Standard Test Method Technical Guide
📐 Scope and Materials
ASTM D1527-99 covers ABS plastic pipe in Schedule 40 and 80 sizes, produced by single extrusion or coextrusion. The pipe is pressure-rated for water and intended for pressurized liquids chemically compatible with ABS. The standard includes criteria for classifying materials (per ASTM D3965), nomenclature, and requirements for dimensions, workmanship, sustained pressure, burst pressure, and extrusion quality.
Values are in inch-pound units, and the standard references notes and appendixes for explanatory material. It is approved for use by Department of Defense agencies.
⚙️ Dimensions and Pressure Ratings
Schedule 40 and 80 pipes have standardized dimensions per ASTM D2122. Below are typical nominal dimensions and pressure ratings based on the hydrostatic design basis from ASTM D2837:
| 🟦 Nominal Size (in) | 📏 Outer Diameter (in) | 📐 Schedule 40 Wall (in) | 📐 Schedule 80 Wall (in) | 🎯 Pressure Rating – Sched 40 (psi) | ⚡ Pressure Rating – Sched 80 (psi) |
|---|---|---|---|---|---|
| 1/2 | 0.840 | 0.109 | 0.147 | 162 | 230 |
| 3/4 | 1.050 | 0.113 | 0.154 | 144 | 196 |
| 1 | 1.315 | 0.133 | 0.179 | 120 | 175 |
| 2 | 2.375 | 0.154 | 0.218 | 108 | 154 |
Note: Pressure ratings are typical at 73°F for water. Refer to ASTM D1527-99 for complete tables, tolerances, and derating factors.
📊 Test Methods and Requirements
To verify performance, the standard requires tests for sustained pressure, burst pressure, dimensions, and extrusion quality. Key referenced methods include:
- D1598 – Time-to-failure under constant internal pressure
- D1599 – Resistance to short-time hydraulic pressure (burst)
- D2122 – Determining dimensions of thermoplastic pipe and fittings
- D2837 – Obtaining hydrostatic design basis for pressure classification
These methods ensure the pipe meets the specified requirements for material integrity and performance in service.
⚠️ Safety Hazard: Pneumatic testing with compressed air or gases is dangerous due to stored energy. Follow the safety caveat in Section 7 and consult manufacturers before any compressed gas testing. Hydraulic testing is strongly recommended.
💡 Compliance Tip: For drinking water applications, verify compliance with NSF Standard 61 for health effects, as referenced in the standard.
❓ Frequently Asked Questions
🔍 What do Schedule 40 and 80 mean for ABS pipe?
They indicate wall thickness; Schedule 80 has a thicker wall than Schedule 40, providing higher pressure capacity. Both are defined in ASTM D1527 with specific dimensions.
💡 Can ABS pipe be used for all pressurized liquids?
No, it is only intended for liquids chemically compatible with ABS. Incompatible liquids can cause degradation or failure. Always check manufacturer guidelines and material resistance data.
⚡ How is the burst pressure determined?
Burst pressure is determined using Test Method D1599, which applies short-term hydraulic pressure until the pipe fails. This value is used to verify material strength.
📌 What are the safety considerations for testing?
Avoid pneumatic testing due to explosion hazards. Use hydraulic methods and follow Section 7 safety precautions. Establish appropriate safety and health practices per regulatory requirements.