Indus Industrial Group supplies heavy-duty GRP Double Socket Mechanical Sleeve Couplings engineered in nominal pipe sizes from DN300 (12") to DN3000 (120") in pressure ratings from gravity up to PN25. Conforming to EN 1796, ISO 10639, and EN 681-1 standards, these high-tensile filament-wound composite sleeves feature internal elastomeric EPDM/NBR rubber sealing gaskets with precision-formed sealing lips and an integrated central register stop. Designed for fast, tool-free field jointing of GRP pressure pipelines and gravity sewers, they accommodate axial thermal movement and angular soil deflection without leaking.
| Pricing Verification | Commercial Quote on Demand (RFQ) |
| Nominal Diameters | DN300 to DN3000 (12" to 120") Full Range Coverage |
| Pressure Ratings | Gravity (SN5000/10000), PN6, PN10, PN16, PN20, PN25 |
| Coupling Sleeve Material | Continuous Filament-Wound Fiberglass Reinforced Polyester |
| Sealing Gasket Compound | EPDM (Potable Water WRAS certified) / NBR (Oily Water & Sewer) |
| Gasket Governing Standard | EN 681-1 Type WA / WC (Elastomeric Sealing Rings) |
| Angular Deflection Allowance | DN300–DN500: up to 3.0° | DN600–DN1000: up to 2.0° | DN1200+: up to 1.0° |
| Axial Travel Capability | ± 10mm to ± 25mm longitudinal thermal movement |
| Hydrostatic Test Pressure | 1.5 × Nominal Working Pressure per ISO 10639 |
| Governing Standards | EN 1796 / EN 14364 / ISO 10639 / ASTM D4161 |
| Sector & Division | Water & Wastewater (Div 01) |
| Parent Category | GRP / FRP Transmission & Sewer Pipes |
Mega-diameter water transmission jointing, gravity sewer line assembly, pipeline repair sleeve replacement, and pipe jacking collar coupling across Baghdad, Basra, Erbil, Najaf, and Karbala.
Jointing integrity is the critical factor in preventing pipeline leakage, joint blowout, and groundwater ingress in large-diameter municipal water and sewer networks. GRP Double Socket Couplings provide an engineered flexible joint that matches the structural longevity and corrosion resistance of the GRP pipeline itself. The coupling collar is manufactured from high-density filament-wound fiberglass roving impregnated with vinyl ester or isophthalic resin, delivering massive circumferential burst resistance.
Inside the coupling collar, dual circumferential grooves house heavy EPDM elastomeric sealing gaskets manufactured to EN 681-1. Each gasket features multi-lip sealing geometry that energizes under internal hydrostatic pressure: the higher the internal pressure, the tighter the rubber lips press against the smooth machined spigot ends of the pipes. A central elastomeric rubber stop ring prevents pipe-to-pipe contact during installation and provides an expansion gap for longitudinal thermal movement.
The coupling allows up to 1.5 to 3.0 degrees of angular deflection (depending on diameter), enabling pipeline contractors in Iraq to lay long pipelines along highway curves without installing expensive fabricated bends. Staged in bulk quantities with companion lubricant paste at Indus distribution yards in Baghdad, Basra, and Erbil.
Yes. GRP repair couplings can be slid over cut pipe ends and pulled back into place with specialized puller jacks, providing a permanent, corrosion-proof mechanical repair without requiring field fiberglass lamination.
Contractors must use non-toxic, water-soluble vegetable-based pipe joint lubricant certified safe for drinking water. Petroleum-based greases must never be used as they degrade EPDM rubber gaskets.
Depending on nominal diameter, couplings permit between 1.0° and 3.0° angular deflection, allowing pipeline contractors to lay large curves naturally along road alignments.
