MRPP - a polymeric pipe, reinforced by a rigid steel carcass made of a welded wire. The rigidity of the carcass together with chemical resistance and other exclusive qualities of polyethylene provide a multipurpose use of the MRPP in different industries, including oil, gas, acid, alkali transportation and cold/hot water supply. High abrasive resistance of MRPP makes possible a transportation of aggressive liquids containing mechanical additives.
MRPP provide:
• Steady going pipeline operation in the conditions of moist and aggressive soil
• Minimal requirements to preparation of trenches for lining
• No need in waterproofing or electrochemical protection
Materials used in MRPP production:
• ELTEX polyethylene (by Solvay Polyolefins Europe, Belgium) or Dow Chemical polyethylene
• 3 millimeter steel wire
Polyethylenes used are approved for contact with food products, that’s the reason why MRPP can be used for drinking water pipelines construction.
Steel carcass provides MRPP with a high mechanical rigidity and self-supporting ability. Glossy inner surface and the absence of the material and environment adhesion prevent formation of deposits and provide an increase in the pipeline pass-through capacity by more than 20% relatively to a steel pipeline. Linear extension coefficient is almost equal to that of a steel pipe.
The empirical evidence of MRPP operation proves a high positive economic effect assuming mid-term and long-term periods of operation.
Dimension-types and technical characteristics of MRPP’s Pipe bends, T-like fittings, joint types.
| Product | Dimensions, mm | Specifications | Weight, kg/m | ||||
|---|---|---|---|---|---|---|---|
| Outer diameter | Wall thickness | Wire diameter | Draft-end load, kNt, not less than | Hermeticity under constant pressure during 1 hour, not less than | Ultimate stress, Mpa, not less than | ||
| MPP 95 | 95 | 11,0 | 3,0 | 6.0 | 10,5 | 19,0 | 6.51 |
| MPP 115 | 115 | 11,5 | 3,0 | 7,2 | 9,0 | 15,0 | 8,51 |
| MPP 140 | 140 | 12,0 | 3,0 | 9,0 | 7,5 | 13,0 | 10,22 |
| MPP 160 | 160 | 12,0 | 3,0 | 11,0 | 6,0 | 11,5 | 12,37 |
| MPP 200 | 200 | 12,5 | 3,0 | 14,0 | 5,4 | 9,0 | 15,35 |
| MPP 225 | 225 | 12,5 | 3,0 | 16,0 | 4,8 | 8,0 | 17,58 |
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