A DWC (Double Wall Corrugated) pipe is a HDPE piping system with a smooth inner wall for low-friction flow and a corrugated outer wall for high ring stiffness and crush resistance. DWC HDPE pipes are used for underground sewerage, stormwater drainage, and cable ducting.

Are DWC HDPE pipes better than concrete (RCC) pipes?

Yes. DWC HDPE pipes weigh roughly 1/8th of RCC pipes, install up to 4× faster, are leak-free with O-ring socket joints, and offer a service life of 50+ years with full corrosion resistance to wastewater.

Which Indian standard governs DWC HDPE pipes?

DWC HDPE sewer and drain pipes are governed by IS 16098 (Part 2). DWC HDPE cable ducting pipes are governed by IS 16205 (Part 24): 2018. ALOM's Alcorr and Telecorr ranges are certified to these standards.

What sizes of DWC pipes does ALOM manufacture?

ALOM manufactures DWC HDPE pipes from 50 mm to 1000 mm internal diameter, in stiffness classes SN4 and SN8, suitable for shallow and deep underground installations.

What is a DWC Pipe?

A DWC (Double Wall Corrugated) pipe is a structured-wall HDPE piping system with two co-extruded walls fused into one section:

A smooth inner wall that delivers low hydraulic friction (Manning's n ≈ 0.009).
A corrugated outer wall that provides ring stiffness, crush resistance and bending flexibility.

The combination gives the hydraulics of a smooth pipe with the structural stiffness of a thick-walled pipe at roughly one-eighth the weight of equivalent RCC. DWC HDPE is the dominant modern choice for buried gravity-flow sewerage, drainage and cable ducting up to 1000 mm.

Installation manual

Manual on Installation Practices — Alcorr DWC PE Pipe: the full field reference — handling and storage, trench excavation, dewatering, foundation and bedding, laying and jointing, curved alignments, backfill and testing, to IS 16098 (Part 2).

Frequently asked questions

Q: Are DWC pipes better than RCC? For gravity-flow sewerage and drainage, yes — lighter, faster to install, leak-tight, corrosion-immune, and 75–100 year service life vs ~30 for RCC.

Q: Which Indian standards govern DWC? IS 16098 (Part 2) for sewerage and drainage. IS 16205 (Part 24): 2018 for cable ducting.

Q: What sizes does ALOM manufacture? 50 mm to 1000 mm internal diameter, in stiffness classes SN4 and SN8.

Q: Can DWC handle deep burial and heavy traffic? Yes — use SN8 class with proper sand/granular bedding and compacted backfill. Suitable for Class A traffic loading and deep cover.