PE 63 vs PE 80 vs PE 100: Choosing the Right HDPE Material Grade
What is the difference between PE 63, PE 80 and PE 100 HDPE pipes? This guide explains material grades, how they affect pressure capacity, and which grade IS 4984:2016 recommends.
When you see 'PE 100' or 'PE 80' printed on an HDPE pipe, it refers to the material grade — the strength class of the polyethylene resin. This grade directly determines how much pressure the pipe can carry for a given wall thickness.
What Do the Grade Numbers Mean?
The number after 'PE' refers to the MRS — Minimum Required Strength — of the material, in units of 0.1 MPa:
| Grade | MRS (MPa) | Strength Level | Status in India |
|---|---|---|---|
| PE 63 | 6.3 MPa | Lowest | Older grade, being phased out |
| PE 80 | 8.0 MPa | Medium | Widely used across India |
| PE 100 | 10.0 MPa | Highest | Current best-in-class standard |
How Grade Affects Pressure Rating
Higher grade = higher pressure rating for the same SDR (same wall thickness). This is the key practical difference:
| SDR | PN for PE 63 | PN for PE 80 | PN for PE 100 |
|---|---|---|---|
| SDR 41 | PN 2 | PN 2.5 | — |
| SDR 33 | PN 2.5 | PN 3.2 | PN 4 |
| SDR 26 | PN 3.2 | PN 4 | PN 5 |
| SDR 21 | PN 4 | PN 5 | PN 6 |
| SDR 17 | PN 5 | PN 6 | PN 8 |
| SDR 13.6 | PN 6 | PN 8 | PN 10 |
| SDR 11 | PN 8 | PN 10 | PN 12.5 |
| SDR 9 | PN 10 | PN 12.5 | PN 16 |
| SDR 7.4 | PN 12.5 | PN 16 | PN 20 |
| SDR 6 | — | PN 20 | PN 20 |
Key insight: A PE 100 SDR 11 pipe handles PN 12.5, while a PE 80 SDR 11 pipe of exactly the same dimensions handles only PN 10. Same wall thickness, 25% more pressure capacity — just from the better material grade.
Pressure Classes Supported by Each Grade
From IS 4984:2016 Annex A grouping guidelines:
- PE 63: Supports PN 2 through PN 8 only (lower pressure applications)
- PE 80: Supports PN 2.5 through PN 20 (covers most Indian applications)
- PE 100: Supports PN 3.2 through PN 20 (all high-pressure applications)
Which Grade Should You Choose?
- PE 63: Only for very low-pressure gravity systems; being phased out of most specifications
- PE 80: Good for standard irrigation, water supply and municipal projects up to PN 16
- PE 100: Recommended for all applications — best performance, same or marginally higher cost
TARKO manufactures HDPE pipes in PE 100 grade as standard — the highest grade available under IS 4984:2016, providing maximum pressure capacity and long-term reliability for every project.
Related Technical Guides
Need Help Choosing the Right Pipe?
Our team at TARKO will help you select the correct size, SDR and pressure rating for your project.