Question 1

What is the difference between SN4 and SN8 ring stiffness classes?

Accepted Answer

Ring stiffness is measured in kN/m². SN4 means a minimum ring stiffness of 4 kN/m², and SN8 means a minimum of 8 kN/m². SN8 DWC pipes are engineered for deep burials, crossings under highways/railways, and heavy traffic loading areas, whereas SN4 is suitable for shallow installations or light traffic loads.

Question 2

What Indian standards do your DWC pipes follow?

Accepted Answer

Our Alcorr DWC pipes for sewers and gravity drainage are manufactured in strict compliance with IS 16098 (Part 2) and bear the BIS Standard Mark. Our Telecorr DWC cable protection conduits conform to IS 16205 (Part 24): 2018.

Question 3

What is the minimum order quantity (MOQ)?

Accepted Answer

Minimum order quantities depend on the pipe size and delivery location. Since B2B infrastructure supplies are customized, please contact our sales office at mktg@alom.in or submit the contact form with your layout sizes for a detailed project quotation.

Question 4

Do you supply for Jal Jeevan Mission (JJM) projects?

Accepted Answer

Yes, ALOM Poly Extrusions is a registered and approved supplier for various water supply and wastewater projects under the Jal Jeevan Mission (JJM), AMRUT, Smart Cities, and National Highway authority projects across India.

Question 5

What are the advantages of DWC HDPE pipes over RCC pipes?

Accepted Answer

DWC HDPE pipes are lightweight (about 1/8th the weight of concrete), making transport and hand-laying easy without heavy machinery. They are chemically inert (do not suffer from hydrogen sulphide crown corrosion in sewers) and feature watertight O-ring joints that eliminate groundwater infiltration.

Question 6

What sizes of DWC pipes does ALOM manufacture?

Accepted Answer

ALOM manufactures DWC HDPE pipes ranging from 50 mm up to 1000 mm internal diameter (ID). The pipes are supplied in standard 6-meter lengths (with or without integrated sockets) for quick, reliable connection.

Question 7

How does the lifecycle cost of DWC pipes compare to RCC?

Accepted Answer

Although the initial per-meter material cost is comparable to conventional concrete, DWC HDPE pipes deliver a 30% to 40% reduction in Total Cost of Ownership (TCO) over the project's expected life. Measured across their full 100+ year design life, DWC pipes eliminate heavy crane hire, cut transportation costs, reduce handling breakage to zero, and speed up installation by up to 4×. Over the long term, their immunity to H₂S crown corrosion and watertight joints eliminate the regular maintenance, joint repairs, and premature replacements required by legacy concrete systems.

Question 8

Are ALOM Poly Extrusions manufacturing plants ISO certified?

Accepted Answer

Yes. Our manufacturing plants are ISO 9001:2015 (Quality Management System), ISO 14001:2015 (Environmental Management System), and ISO 45001:2018 (Occupational Health and Safety) certified by TUV India.

Question 9

What is the expected service life of DWC HDPE pipes?

Accepted Answer

DWC HDPE pipes are chemically inert and highly resistant to abrasion, impact, and UV degradation. They have an engineered design service life exceeding 50 to 100 years in underground gravity flow networks.