Engineered for extremes
EPDM Steam 90P
Read the code: EPDM, STM duty (steam and hot water), 90 Shore A, P for peroxide cure, recipe 01.
Development grade. The values below are design targets, not measured results. Each target becomes a typical value, with the number of lots and the test report behind it, as testing is completed.
A 90 Shore A EPDM for saturated steam and hot water to 250 °C: geothermal wells and plants, steam injection and SAGD, and high-pressure steam valves. Not for oils, and not where hot air or oxygen is present.
- Polymer class
- EPDM
- Duty
- STM: steam and hot water
- Pole mark
- HPHT
- Hardness
- 90 Shore A
- Temperature range
- -45 to 250 °C
- Lead time
- Trial quantities on request
- Minimum order
- 25 kg
- Issued
- 2026-10-28
- Revision
- A
- Packing
- Per order
Design targets and release limits
| Property | Target | Limits | Unit | Method |
|---|---|---|---|---|
| Hardness | 90 | 85 to 95 | Shore A | ASTM D2240 / ISO 48-4, 1 s |
| Specific gravity | 1.15 | ±0.02 of approved value | ASTM D297 / ISO 2781 | |
| Tensile strength | 14 | min 11 | MPa | ASTM D412 die C / ISO 37 type 2 |
| Elongation at break | 120 | min 90 | % | ASTM D412 die C / ISO 37 type 2 |
| Compression set, 70 h at 200 °C | 30 | max 40 | % | ASTM D395 method B, button |
| TR10 | -45 | max -40 | °C | ASTM D1329 / ISO 2921 |
| Saturated steam, 168 h at 250 °C, hardness change | -5 | -10 to 5 | points | In-house autoclave method |
| Saturated steam, 168 h at 250 °C, volume change | +3 | max 8 | % | In-house autoclave method |
| Saturated steam, 168 h at 250 °C, tensile change | -25 | max -40 | % | In-house autoclave method |
Qualification plan
The grade code says what this compound is designed for. This table says what it has passed: a duty is claimed only once its report is on file.
| Test | Standard or method | Conditions | Status |
|---|---|---|---|
| Steam ageing | In-house autoclave method, published with results | 168 h and 500 h at 230 °C and 250 °C | Planned |
| Geothermal brine ageing | In-house method | Brine with H2S and CO2 at rated temperature | Planned |
| Steam and CO2 decompression (optional) | ISO 23936-2 Annex B adapted | Per project | Planned |
Design targets are the values the compound is designed to reach. They are not measured results and they are not a warranty. Release limits apply to lots once the recipe is approved. The grade code says what the compound is designed for; the qualification plan says what it has passed. Confirm suitability in your own application and fluids.
Every lot is supplied with a certificate of analysis. Enter the lot ID under Track on the website to see the lot record. Pascalor is an independent brand and is not affiliated with any polymer manufacturer named elsewhere on this site.
Registered entity name to be added | quotes@pascalor.com