IS 4984:2016 HDPE Pipe Specification: Technical Standards & BIS Testing Manual

IS 4984:2016 — 'Polyethylene Pipes for Water Supply — Specification (Fifth Revision)' — is the governing technical standard for HDPE potable water piping across India. Administered by the Bureau of Indian Standards (BIS) under Scheme-I of the BIS (Conformity Assessment) Regulations 2018 (Document No. PM/ IS 4984/3/June 2022), it defines the chemical, mechanical, dimensional, and testing benchmarks required for pipes carrying potable water under pressure.

1. Raw Material Specifications (Clause 5)

Under Clause 5 of IS 4984:2016, the durability and service life of an HDPE pipe depend directly on virgin polymer integrity. The standard mandates three critical raw material controls:

• Polyethylene Resin (Clause 5.2): Must meet Table 2 (base density 940–960 kg/m³, MFR 0.15–1.1 g/10 min, OIT > 20 min) and IS 7328:2020. Up to 5% of the manufacturer's own rework material is permitted (Amendment 2, clause 5.5); no other rework or recycled material is allowed. Pre-compounded black material or natural resin with dedicated carbon black masterbatch must be used.
• Carbon Black (Clauses 5.3 and 8.3): finished pipe must contain 2.5 ± 0.5% carbon black by mass, well dispersed, to provide complete protection against UV degradation when laid above ground or stored outdoors.
• Anti-Oxidant Incorporation (Clause 5.4): Food-grade phenolic and phosphite antioxidants must be homogeneously compounded to resist thermal degradation during extrusion and ensure an Oxidation Induction Time (OIT) exceeding 20 minutes at 200°C.

2. Product Grouping (BIS Product Manual)

For certification and quality audit under the BIS Product Manual, polyethylene pipes are categorized into standardized material grades, pressure classes, and diameter groups:

Pressure Rating & Size Groups for BIS Scheme-I Auditing

The BIS Product Manual classifies pipes into three Pressure Groups and five Size Groups for rigorous third-party batch surveillance and testing:

3. Working Pressure (PN) vs SDR Relationship

The working pressure rating (PN in bar) of an HDPE pipe is directly derived from the material's Minimum Required Strength (MRS) and its Standard Dimension Ratio (SDR = Outer Diameter ÷ Wall Thickness). With the overall service design coefficient C = 1.25 and the pressure reduction coefficient fT = 0.85 for water at 27 °C (Annex A), the relationship is:

4. Scheme of Inspection and Mandatory Testing (BIS Product Manual)

Under Annex C and Table 1 of the BIS Product Manual, every certified manufacturing unit must operate a fully equipped internal testing laboratory (Annex B). A 'Control Unit' is defined as up to 48 hours of continuous extrusion from a single machine using the same batch of raw material. Testing frequencies and pass criteria include:

5. Standard Marking (Clause 10)

Pipes conforming to IS 4984:2016 must be continuously and indelibly marked along their length. Clause 10 (as revised by Amendment 2) requires, every 1 m, the manufacturer's name or trade mark, the pipe designation per clause 6.1 (grade, PN, nominal OD, SDR) and the lot/batch number with date of manufacture; the Standard Mark may be added under a BIS licence. A typical print line:

• Co-extruded Blue Stripes: Required on black pipes for potable water distribution (minimum 3 longitudinal stripes spaced evenly around the circumference).
• Traceability: Batch number, extrusion line, and manufacturing date are marked every 1 metre to allow complete batch traceability back to raw polymer silos.
• Verification: Government project inspection agencies (CIPET, RITES, SGS, WAPCOS) verify the BIS CM/L licence against the Bureau of Indian Standards online portal before issuing inspection clearance certificates (MDCC).

6. Why Engineers and Tender Bidders Choose TARKO

At our MIDC Hingna manufacturing plant in Nagpur, Sakhi Industries (TARKO) operates state-of-the-art extrusion lines with continuous ultrasonic wall-thickness monitors and gravimetric dosing. Because we maintain our own in-house NABL-aligned testing laboratory equipped per Annex B with hydro-testing pressure rigs, combustion furnaces, and digital MFR apparatus, every single batch leaves the factory with an authentic Manufacturer's Test Certificate (MTC).

Whether you are engineering a multi-village rural piped water supply scheme under Jal Jeevan Mission, high-head agricultural lift irrigation, or industrial effluent transfer, TARKO delivers factory-direct pricing, full tender documentation, and certified quality from DN 20mm up to DN 630mm.