OPaL HDPE Opalene P4402U

OPaL HDPE Opalene P4402U is a natural‑colored, UV‑stabilized high‑density polyethylene (HDPE) pipe‑extrusion grade manufactured by ONGC Petro additions Limited (OPaL) under the Opalene (Opalene HD) product line. Produced using Mitsui CX slurry polymerization technology, this grade is positioned for PE63 pressure pipe applications where outdoor exposure and long‑term durability matter.

P4402U is selected by pipe manufacturers and project buyers who need a practical balance of extrudability, mechanical strength, and excellent environmental stress crack resistance (ESCR)—with the key differentiator being UV stabilization using HALS additives. That UV package helps reduce the risk of embrittlement and property loss in installations that see sunlight during storage, transport, site handling, or partial above‑ground exposure.

The manufacturer‑anchored regulatory positioning states that the HDPE Pipe grade P4402U shall meet IS 10146:1982 for safe use in contact with foodstuffs, pharmaceuticals, and drinking water, and that the grade and additives must conform to IS 10141:1982 (positive list of constituents). This makes P4402U a strong fit for drinking‑water and irrigation networks where compliance signaling and consistent performance are non‑negotiable.

Technical insights

P4402U’s typical properties are commonly evaluated by engineers to predict extrusion stability, pressure‑pipe performance, and long‑term reliability:

• Melt Flow Index (190°C/2.16 kg): 0.25 g/10 min indicates a relatively low flow, supporting melt strength and stable pipe extrusion—helpful for maintaining dimensional control and wall uniformity.
• Density (23°C): 0.944 g/cm³ signals an HDPE structure aligned with stiffness and strength requirements typical for PE63 service class pipe.
• Tensile strength at yield: 25 MPa reflects the material’s ability to resist deformation under load—important for pressure‑pipe handling and installation stresses.
• Elongation at break: >500% indicates good ductility, supporting toughness during bending, coiling (where applicable), and site handling.
• Notched Izod impact (23°C): >200 J/m points to strong impact resistance, reducing cracking risk from knocks during transport and installation.
• Flexural modulus: 900 MPa supports pipe stiffness and resistance to ovality under load.
• Hardness: 60 Shore D aligns with a robust HDPE feel and abrasion tolerance expected in ducting and buried lines.
• ESCR (ASTM D1693B, F50, 10% Igepal): >600 hours is a major trust signal for long‑term performance in contact with surfactants/chemicals and real‑world stress conditions.
• Vicat softening point: 120°C and HDT (0.455 MPa): 65°C help indicate thermal behavior during processing and service.
• Oxidative Induction Time (OIT): >30 minutes supports confidence in stabilization against oxidation—especially relevant for outdoor exposure and long service life.

Note: These are typical values (not specification limits), and mechanical properties are reported on compression‑moulded specimens.

Applications

Drinking‑water PE63 pressure pipes

Opalene P4402U is recommended for PE63 drinking‑water pressure pipes where buyers want a pipe material with strong ESCR and a UV‑stabilized package. It is a practical choice for municipal and rural water supply lines, distribution networks, and projects where compliance positioning (IS 10146/IS 10141) is important for approvals.

Irrigation and agricultural water networks

For irrigation pressure pipes and agricultural water distribution, P4402U supports dependable performance under outdoor handling and field conditions. The UV stabilization helps when pipes are stored in open yards or exposed during installation, while the toughness and ESCR support long‑term reliability.

Telecom/cable ducts and protective conduits

P4402U is widely positioned for telecom duct pipes and cable protection conduits, including buried ducting systems. The combination of stiffness, impact resistance, and ESCR helps reduce cracking risk, while UV stabilization adds resilience during above‑ground staging and site work.

Buried piping systems with sunlight exposure during handling

In many buried installations, the pipe may still see sunlight during storage, transport, or partial exposure. P4402U is designed for these real‑world conditions, where a UV‑stabilized PE63 HDPE grade can reduce premature ageing compared to non‑UV pipe grades.

Comparable alternatives

• Opalene P4402 (non‑UV stabilized): Often comparable in base pipe‑grade positioning and may show similar density/MFI behavior, but it lacks HALS UV stabilization. If your pipes will see outdoor exposure (even temporarily), P4402U is typically the safer choice from a durability standpoint.
• Other OPaL pipe grades (e.g., P4002): May be used in pipe/ducting contexts, but selection should be based on matching the project’s pressure class, stabilization needs, and the exact TDS values.
• PE80/PE100 grades (industry comparison): These higher‑strength classes are used for higher pressure ratings and demanding networks. P4402U is positioned as PE63, so it is generally chosen for low‑ to medium‑pressure service and ducting where PE63 is specified.

Practical buying note: comparable PE63 UV‑stabilized HDPE pipe grades exist in the market, but direct grade‑for‑grade equivalence should only be claimed after matching manufacturer TDS data and approvals.

Common search variants

Also searched as: HDPE P4402U, Opal P4402U, Opalene HD P4402U, P4402U pipe grade, UV stabilized HDPE dana, PE63 HDPE pipe granules. Common variants: P4402 U, Opalene P4402 U, P4402u.