Apply to chemical, fertilizer, medicine, paper mill, suchfactories and mines to transport acid or alkaline corrosivematerial.
| Item |
Tensile Mpa ≥ |
Elongation % ≥ |
Abrasion mm³ ≤ |
Hardness +10 -5 |
ozone ageing | ||
| Cover rubber | Physics | before aged test | 14.0 | 400 | 250 | 60 | uncracked |
| after aged test | 12.0 | 340 | - | 65 | - | ||
| Acid resistant | Class | Immerse scald | Potency | Temp.x time | Change after Immersed | ||
| Expansion rate | Intensity rate | ||||||
| A1 | HCL | 18% | 50℃×96h | Under+10% | Within -10% | ||
| A2 | H2SO4 | 50% | 50℃×96h | Under+10% | Within -10% | ||
| A3 | NaOH | 48% | 50℃×96h | Under+10% | Within -10% | ||
| Note:When the thickness of the covering rubber is 0.8mm~1.6mm, the thickness of the specimen can be the maximum thickness of the cut out, in this case, the tensile strength and elongation at break are allowed to be lower than the values in the table within 15%. | |||||||
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