Engineering plastics
PP-H
Homopolymer polypropylene
A light, economical, weldable thermoplastic. Used at higher temperatures than PVC and in acids and bases; common in chemical and galvanizing plants.
- HARDNESS
- Rockwell R55–R102
- Rm · MPa (typical)
- 17–37
- TEMPERATURE
- 0 … +80 °C
- COST
Design
Polymer; defined by its structure and filler type rather than chemical composition.
Mechanical properties
| TYPE · CONDITION | Rm MPa | Elongation at break % | Hardness | Coefficient of friction | Water absorption % |
|---|---|---|---|---|---|
| Unfilled, typical | 17–37 | — | Rockwell R55–R102 | — | 0.01–1.0 |
Typical values (the standard gives no minimum values); they vary with grade and filler. Converted from US units.
Service temperature
0 °C+80 °C−200−1000100200300400500600700800
Physical properties and heat treatment
- DENSITY
- ≈ 0.91 g/cm³
Media suitability GENERAL TREND
Water
Steam
Mineral oil
Fuel, aliphatic HC
Ozone, outdoor
Dilute acid
Caustic
Ketones, esters
Emsal assessment. The final choice is made from corrosion tables, taking concentration, temperature, chloride content and flow velocity into account.
Strengths and weaknesses
Strengths
- Less dense than water, very light
- Good resistance to acids and bases
- Joined by thermal welding
Weaknesses
- Degrades under UV (unless stabilized)
- Weak in oxidizing acids
- Low strength
Manufacturing and use
- ECONOMY
- Low.
- MANUFACTURING METHODS
- Injection moulding · Extrusion
- TYPICAL VALVE PARTS
- Body (thermoplastic valve) · Ball · Filter housing
Source: EN ISO 15494 (system). Values compiled and verified by Emsal Vana; for binding values, refer to the current edition of the standard and the material certificate.