ARMENIAMining composite pipes
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Wear-resistant steel-cord composite pipe combines a plastic inner/outer wall with reinforcement for mining and abrasive slurry transport. The catalogue covers63–250mm nominal inner diameters and1.6,2.0,2.5,3.5 and4.0MPa pressure classes. Its specified connection is a flange joint with internal beading and crimping. Material and composite-pipe tests are provided below, including abrasion, hydrostatic strength, burst, weathering and peel strength.
Technical specifications
Wear-layer properties
| Parameter / test | Requirement |
|---|---|
| Density | 0.88±0.02 |
| MFR190°C,2.16kg | 0.50±0.2 g/10min |
| Tensile strength | ≥20 MPa |
| Strain at break | ≥600% |
| Low-temperature embrittlement | ≤−40°C |
| OIT200°C | ≥30 min |
| Mortar wear | ≤0.30% |
Composite-pipe verified tests
| Parameter / test | Requirement |
|---|---|
| Hydrostatic test | 20°C,1h:2×PN;70°C,165h:1.5×0.7×PN;80°C,165h:1.5×0.6×2.291×PN |
| Result | No leakage or rupture |
| OIT210°C | >20 min |
| MFR variation before/after processing | <20% |
| Weathering | ≥3.5 GJ/m²; hydrostatic test compliance |
| Peel strength100mm/min | Mean≥15N/mm;individual≥12N/mm |
Nominal pipe sizes and pressure
| Inner diameter (mm) | PN (MPa) |
|---|---|
| 63 | 1.6 / 2.0 / 2.5 / 3.5 / 4.0 |
| 75 | 1.6 / 2.0 / 2.5 / 3.5 / 4.0 |
| 90 | 1.6 / 2.0 / 2.5 / 3.5 / 4.0 |
| 110 | 1.6 / 2.0 / 2.5 / 3.5 / 4.0 |
| 140 | 1.6 / 2.0 / 2.5 / 3.5 / 4.0 |
| 160 | 1.6 / 2.0 / 2.5 / 3.5 / 4.0 |
| 200 | 1.6 / 2.0 / 2.5 / 3.5 / 4.0 |
| 225 | 1.6 / 2.0 / 2.5 / 3.5 / 4.0 |
| 250 | 1.6 / 2.0 / 2.5 / 3.5 / 4.0 |
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