Alcorr DWC HDPE Sewer & Drainage Pipes
Alcorr is ALOM's Double Wall Corrugated (DWC) HDPE pipe range engineered for underground gravity-flow sewerage, stormwater drainage and effluent networks.
Standard
IS 16098 (Part 2) — Structured-wall HDPE pipes for non-pressure underground drainage and sewerage.
Construction
- Smooth HDPE inner wall for low-friction (Manning's n ≈ 0.009) flow.
- Corrugated HDPE outer wall for high ring stiffness and crush resistance.
- Co-extruded in a single pass; no welds or seams in the wall.
Sizes and stiffness
- Internal diameter range: 75 mm to 1000 mm.
- Ring stiffness classes: SN4 (4 kN/m²) and SN8 (8 kN/m²). SN8 recommended for deep burial and Class A traffic loading.
Joints
Bell-and-spigot with double EPDM O-ring seals — leak-tight, simple push-fit installation, accommodates ground movement and seismic shift.
Properties
- Service life: 75–100 years in buried gravity-flow service.
- Fully corrosion-resistant to H₂S, sewage and municipal effluents — immune to the crown corrosion that destroys RCC sewer pipes.
- Weight: ~1/8th of an equivalent RCC pipe; install up to 4× faster.
- 100% recyclable HDPE.
Typical applications
Municipal sewerage trunk mains, stormwater drainage, smart-city utility ducting, highway cross-drains, industrial effluent lines, airport and SEZ drainage.
Frequently Asked Questions
What sizes and stiffness classes do Alcorr DWC pipes come in?
Alcorr DWC HDPE pipes are available in nominal internal diameters from 75mm up to 1000mm. They are supplied in stiffness classes SN4 (4 kN/m²) and SN8 (8 kN/m²), with SN16 available on request for advanced requirements. SN8 is the standard class, recommended for deep burials and high-traffic areas.
What standard does Alcorr DWC HDPE pipe comply with?
Alcorr pipes comply with IS 16098 (Part 2), which is the Indian Standard for structured-wall plastic piping systems for non-pressure underground drainage and sewerage.
How are Alcorr pipes jointed to ensure they are leak-proof?
Alcorr pipes feature an integrated bell-and-spigot design. The joint is sealed with double EPDM rubber O-rings, ensuring a leak-proof connection that resists root penetration and accommodates soil settlement or seismic movements.
How does Alcorr compare to traditional RCC concrete pipes?
Alcorr pipes are approximately 1/8th the weight of RCC pipes, making installation up to 4 times faster. Unlike concrete, HDPE is completely immune to Hydrogen Sulfide (H₂S) crown corrosion and has a low roughness coefficient (Manning's n = 0.009), ensuring higher flow capacities.
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