| HS Code | 975397 |
| Density | 959 kg/m³ |
| Meltflowrate 190c 5kg | 0.25 g/10 min |
| Meltflowrate 190c 21 6kg | 8.0 g/10 min |
| Mrsclassification | PE100 |
| Mrsvalue | 10.0 MPa |
| Color | Black |
| Carbonblackcontent | 2.0-2.5% |
| Oxidationinductiontime 200c | >20 min |
| Moisturecontent | <0.02% |
| Tensilemodulus | 1000 MPa |
| Tensilestressatyield | 25 MPa |
| Elongationatbreak | >600% |
| Charpynotchedimpactstrength 23c | 10 kJ/m² |
| Charpynotchedimpactstrength Minus30c | 5 kJ/m² |
| Vicatsofteningtemperature | 120 °C |
| Thermalconductivity | 0.4 W/m·K |
| Linearthermalexpansion | 1.5 x 10^-4 /K |
| Waterabsorption | <0.01% |
| Hardnessshored | 60 |
| Meltingtemperature | 130 °C |
As an accredited Borealis HDPE HE3495-LS-H factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Borealis HDPE HE3495-LS-H is supplied in 25 kg polyethylene bags, palletized at 55 bags (1,375 kg) per shrink-wrapped pallet. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): Borealis HDPE HE3495-LS-H in 25 kg PE bags, palletized, stretch-wrapped, and secured for ocean freight. |
| Shipping | Borealis HDPE HE3495-LS-H is a non-hazardous, solid polyethylene resin, typically shipped as pellets in 25 kg bags, bulk bags, or octabins on pallets. Transport in dry, clean conditions, away from direct sunlight, heat, and moisture. No dangerous goods classification applies; standard freight is suitable. |
| Storage | Store Borealis HDPE HE3495-LS-H in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep original containers closed, labeled, and off the floor to prevent moisture and contamination. Avoid contact with strong oxidizers. Use appropriate grounding to prevent static buildup. Observe good housekeeping; do not smoke. Shelf life may be reduced by prolonged UV exposure. |
| Shelf Life | Borealis HDPE HE3495-LS-H: typically 24 months when stored in original packaging in a dry, well-ventilated area, away from direct sunlight and heat. |
In municipal drinking-water networks, HE3495-LS-H is processed as a fully formulated PE100 solid-wall pressure pipe compound; qualification follows ISO 9080:2012 long-term hydrostatic strength extrapolation, which establishes a minimum required strength of 10 MPa at 20 °C for 50 years, while pipe dimensions and material requirements are governed by ISO 4427-2:2019 and EN 12201-2:2011+A1:2013, with organoleptic and migration compliance demonstrated under NSF/ANSI/CAN 61, AS/NZS 4020:2018, French ACS, or German UBA KTW. The as-supplied pellet contains carbon black at 2.0–2.5 wt%, so no additional black masterbatch is required at the pipe extruder. In-house regrind from the same line is limited to ≤10 wt% for pressure-rated service and is not permitted in the outermost 0.5 mm skin where shear-induced surface oxidation may initiate slow crack growth; post-consumer recyclate is prohibited. Typical melt flow rate under ISO 1133-1:2022 at 190 °C and 5 kg load is 0.23 g/10 min, and density under ISO 1183-1:2019 is 0.959 g/cm³. Pipe production uses a single-screw extruder with a grooved-barrel feed section, L/D between 30:1 and 38:1, a barrier screw with dispersive mixing elements, and a spiral mandrel die for diameters above 200 mm; barrel zones are profiled from 190 °C to 215 °C, the die is held at 210–220 °C, and melt temperature is capped at 230 °C to protect the stabilizer package. Melt pressure at the breaker plate typically falls between 20 MPa and 35 MPa and is monitored as an indicator of gel accumulation rather than as a primary control variable. Vacuum calibration at −0.03 MPa to −0.07 MPa gauge and spray cooling with water at 10–25 °C establish final wall thickness; ultrasonic wall scanning and gravimetric metres per length ensure conformance to ISO 4427-2 tolerance classes. The principal processing conflict occurs in large-diameter thick-wall production: for SDR 11 pipe above 630 mm, wall thickness exceeds 57 mm, and the low thermal diffusivity of HDPE creates a steep radial cooling gradient. Rapid outer quenching elevates residual stress, and longitudinal reversion measured under ISO 2505:2022 may approach 3 %; stepwise spray cascades and controlled re-heat sections are therefore used to flatten the cooling profile. The LS-H low-sag molecular design maintains low-shear melt stiffness and controls parison sag in large spiral dies, permitting die gaps of 20–40 mm for diameters above 800 mm. Terminal product types include solid-wall SDR 9 PN20, SDR 11 PN16, SDR 13.6 PN12.5, SDR 17 PN10, and SDR 26 PN6.3 pipe in coils from 20 mm to 125 mm diameter and straight lengths from 63 mm to 1200 mm diameter, joined by butt fusion to ISO 21307:2017 or electrofusion.
| SDR | Nominal pressure | Common manufacturing diameter range |
|---|---|---|
| 9 | PN 20 | 20–630 mm |
| 11 | PN 16 | 20–1200 mm |
| 13.6 | PN 12.5 | 90–630 mm |
| 17 | PN 10 | 50–1200 mm |
| 26 | PN 6.3 | 315–2000 mm |
Pressurized irrigation and raw-water transfer mains are produced to ISO 16422:2014 and ISO 4427-2:2019, but the design condition is dominated by surge pressure rather than static pressure; repeated pump-start and valve-closure events impose fatigue cycles absorbed by the viscoelastic response of HDPE. The base compound is used at 100 % virgin pellet, with carbon black at 2.0–2.5 wt% and no additional formulation modification; own-regrind levels are normally capped at 10 wt%, though certain non-potable above-ground specifications allow 15 wt% only when hydrostatic re-qualification under ISO 9080:2012 is available. Extrusion lines for irrigation typically target coilable diameters of 20–250 mm and run at higher line speed than thick-wall potable-water pipe; die-head temperature is held at 205–215 °C, and vacuum calibration uses water at 15–25 °C to minimize coil-induced buckling. Because above-ground black pipe surfaces can reach temperatures above 50 °C in storage or desert exposure, maximum operating pressure is derated according to the temperature-rerating factors of ISO 4427-1:2019. Terminal product types include irrigation submain and mainline solid-wall pipe, suction and return lines for sprinkler pivots, raw-water transfer pipelines, and pumped distribution laterals; drip tape is not produced from this molecular weight class because thin-wall processing requires LLDPE/LDPE rheology.
Natural-gas distribution pipe extrusion requires a stricter virgin-material policy than water pipe; HE3495-LS-H is qualified as a PE100 gas-pipe compound under ISO 4437-2:2014 and EN 1555-2:2010, with hydrostatic strength verified according to ISO 1167-1:2006, slow crack growth resistance by the notched pipe test of ISO 13479:2022, and rapid crack propagation resistance by the S4 test of ISO 13477:2008. The as-supplied pellet contains 2.0–2.5 wt% carbon black for UV and weathering resistance; no additional black masterbatch is used. Where national installation codes require yellow identification, a coextruded yellow stripe is applied through a satellite extruder of 25–45 mm screw diameter feeding a pigmented HDPE skin layer into the die; the stripe compound uses the same HDPE carrier resin loaded with 5–8 wt% inorganic yellow masterbatch, applied at 0.2–0.4 mm thickness, and this skin layer does not contribute to the pressure-bearing wall-thickness calculation. Production is carried out with 100 % virgin material and a melt filtration pack of 200–400 µm to meet the low-critical-defect requirements for gas service; post-consumer recyclate and mixed-color regrind are prohibited. Extruder barrel temperatures are set from 190 °C to 210 °C, die temperature at 205–215 °C, and melt temperature is capped at 220 °C to preserve oxidation induction time above 20 min at 210 °C when tested by differential scanning calorimetry per ISO 11357-6:2018. Terminal product types include SDR 11 gas mains rated for 10 bar maximum operating pressure, SDR 17 laterals rated for 6 bar, and service lines from 20 mm to 315 mm diameter; joining is by butt fusion per ISO 21307:2017 or electrofusion per ISO 12176-2:2012.
Industrial process-water and effluent pressure mains are specified under ISO 15494:2015 for plastics piping in industrial applications, supplemented by ISO 4427-2:2019 for dimensions and EN ISO 15494:2015 where European chemical-plant codes apply; potable-water health approvals are not required unless the line is cross-connected to process water for food use. The material is processed as supplied with 2.0–2.5 wt% carbon black; no formulation adjustment is required for neutral aqueous streams up to 40 °C. In-house regrind is limited to ≤10 wt% and must be dry, with no contact with product streams containing surfactants or hydrocarbons that could absorb into the polymer matrix. The production process follows solid-wall PE100 pipe extrusion, but downstream manufacturing commonly includes pre-fabricated spool fitting: pipe is cut, butt-fused to flanges and stub ends using ISO 21307:2017, hydrostatically tested at 1.5 × nominal pressure, and delivered as modular sections. The recognized operating boundary is residual chlorine or chlorine dioxide attack; at oxidant residuals above 1 mg/L and continuous temperatures above 40 °C, oxidative degradation can reduce slow crack growth resistance and shorten service life. Published data for this specific HE3495-LS-H configuration under continuous hypochlorite exposure is limited; therefore each chemical stream is qualified by immersion testing and OIT retention according to ISO 11357-6:2018. Terminal product types include industrial raw-water mains, cooling-water circuits with service temperatures below 40 °C, neutral effluent force mains, and process transfer lines in food and pharmaceutical plants where the base polymer is referenced in 21 CFR 177.1520 and where REACH EC 1907/2006 registration confirms that no SVHC of concern is present above 0.1 % w/w; RoHS 2011/65/EU is relevant only if the pipe is integrated into electrical or electronic equipment, and the compound contains no intentionally added lead, cadmium, chromium(VI), or mercury.
Slurry transport of tailings, process water, and heap leach solutions is a demanding but real downstream segment for HE3495-LS-H; no single global product standard governs slurry tailings pipe, so end-user specifications combine ISO 4427-2:2019 for solid-wall dimensions, ASTM F714-23 for large-diameter PE pressure pipe, and ISO 9080:2012 for long-term strength classification. The compound is used at its as-supplied carbon-black level of 2.0–2.5 wt%; no mineral filler, UHMWPE powder, or fluoropolymer processing aid is added because incompatible rheology and weak interfacial fusion between dissimilar high-density fractions degrade notched slow crack growth resistance under ISO 13479:2022. Published data for such modified blends in this specific grade is limited, and pipe manufacturers typically avoid them for pressure-rated slurry service. Extrusion for slurry lines prioritizes thick-wall SDR 9 and SDR 7.4 pipe with wall thicknesses above 20 mm; the process uses the same grooved-barrel single-screw platform with L/D 30:1–38:1, but barrel output is derated by 10–15 % relative to potable-water pipe of equal diameter because thick cross-sections demand longer residence time under vacuum calibration. Post-extrusion fabrication commonly includes butt fusion of long strings according to ISO 21307:2017, followed by hydrostatic testing at 1.5 × nominal pressure. The operational boundary is set by particle-induced erosion rather than internal pressure: with silica-rich mineral slurries at mean velocities above 6 m/s, wall-thickness loss accelerates, particularly at short-radius bends and unlined flanges; sharp angular particles above 50 mm produce cutting wear that PE100 cannot resist as effectively as UHMWPE or rubber-lined steel. Continuous slurry temperatures above 40 °C require derating of hydrostatic capacity and reduce oxidation induction time. Terminal product types include tailings discharge pipelines, heap leach solution distribution lines, mine dewatering headers, and return-water lines for mineral processing; HDPE is selected for these lines because electrochemical corrosion and scale accumulation are absent, but it is not a substitute for ceramic-lined pipe in high-velocity coarse tailings duty.
Where trenchless insertion of PE100 solid-wall liner is used to restore degraded cast-iron or ductile-iron water mains, HE3495-LS-H is selected for its slow crack growth resistance under insertion-induced bending and axial pull force. The applicable framework for municipal water main rehabilitation is ISO 11298-1:2018, with the pipe itself supplied under ISO 4427-2:2019 or ASTM F714-23, and butt fusion of insertion strings performed to ISO 21307:2017 and ASTM F2620-19. The formulation is kept fully virgin in most rehabilitation specifications; own regrind is limited to ≤5 wt% because the liner must retain maximum elongation and notch toughness, and post-consumer recyclate is excluded. The downstream production process begins with standard solid-wall pipe extrusion, but the final manufacturing step before installation is the construction of a fused continuous string: pipes are butt-fused, inspected by ultrasonic testing, hydrostatically tested at 1.5 × nominal pressure, and then pulled by winch through the host main under controlled tensile load. Insertion bending radius is normally maintained at not less than 20 times the outside diameter for SDR 17 and 25 times the outside diameter for SDR 11 to keep flexural strain below 4 %; axial pull force is calculated from the safe-pull equation and must remain below the product of pipe cross-sectional area and the allowable tensile stress for PE100. Terminal product types include slip-lining strings for potable-water distribution mains, pressure sewer force-main liners, and short segmental liners inserted through service pits; this material is not used for close-fit deformed liner processes such as fold-and-form or pipe-bursting replacement where the liner is subjected to severe compression and recovery strain.
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Borealis HDPE HE3495-LS-H is a black, bimodal high-density polyethylene pipe extrusion compound classified as PE 100 under ISO 12162, with a minimum required strength of 10 MPa at 20 °C for 50 years. The grade is supplied in pellet form and is intended for pressure piping systems in drinking water, industrial water, and sewer force main applications. Its bimodal molar mass distribution combines a high-molecular-weight fraction for slow crack growth resistance with a lower-molecular-weight fraction that preserves shear thinning during extrusion. This structural balance allows the compound to be processed at practical output rates while retaining the hydrostatic design basis associated with PE100.
The low-sag formulation targets large-diameter, thick-wall pipe where melt stability between the die and calibrator determines wall-uniformity yield. Compared with standard monomodal PE100 products of equivalent MRS, the grade reduces gravity-driven melt sag without increasing filler content or sacrificing pipe surface quality. Carbon black is incorporated into the resin rather than dry-blended at the extruder feed hopper, ensuring dispersion consistency that is measured by ISO 6964.
| Property | Test method | Typical value range |
|---|---|---|
| Density of black compound | ISO 1183-1 | 0.956–0.962 g/cm³ |
| Melt flow rate at 190 °C, 5 kg | ISO 1133-1 | 0.20–0.25 g/10 min |
| Tensile modulus | ISO 527-2 | 1000–1200 MPa |
| Elongation at break | ISO 527-2 | >600 % |
| Carbon black content | ISO 6964 | 2.0–2.5 % |
| Oxidation induction time | ISO 11357-6 | >20 min |
The tabulated values are typical lot-average ranges from manufacturer product data; specification release limits are lot-specific and may be narrower. The density of the black compound is higher than the corresponding natural resin because of the carbon black loading, and this must be accounted for when converting mass flow into volumetric output per metre of pipe.
The primary distinction lies in the shape of the molar mass distribution. Monomodal PE100 grades derive their slow crack growth resistance by shifting the entire molecular weight distribution upward, which commonly increases melt elasticity and raises die pressure. HE3495-LS-H uses a bimodal distribution in which the high-molecular-weight fraction is diluted by a controlled lower-molecular-weight fraction. The result is a higher melt strength for sag resistance and a lower tendency to drawdown, while the shear-thinning character remains sufficient for grooved-feed extrusion. In practical terms, pipe manufacturers can target the same wall thickness as a monomodal PE100 design without increasing melt temperature or accepting lower line speed.
The bimodal distribution also influences crystallisation behaviour. Short-chain branching introduced by comonomer is concentrated in the high-molecular-weight fraction, reducing lamellar thickness and increasing the number of tie molecules. Those tie molecules are the structural basis for slow crack growth resistance. A monomodal grade with the same average molecular weight cannot reproduce the same tie-molecule density without sacrificing processability, because the entire molecular weight envelope shifts toward higher viscosity.
Compared with PE80 pipe compounds, HE3495-LS-H permits a higher design stress and therefore thinner walls for the same internal pressure rating. The MRS difference from 8 MPa to 10 MPa does not change the chemical compatibility profile materially, but it alters the minimum wall thickness and the sensitivity of the installed pipe to scratches and point loads. For a given diameter and pressure rating, the higher design stress can reduce polymer consumption relative to PE80 by roughly 15–20 %, depending on SDR class and service factor.
In production-scale extrusion on a single-screw grooved-barrel machine with an L/D ratio between 30:1 and 36:1, the melt temperature is commonly maintained between 190 °C and 220 °C. Barrel set-points are frequently ramped from 170 °C near the feed throat to 195–210 °C in the metering zone, with the die head held at 200–210 °C. Exceeding 230 °C accelerates consumption of the stabiliser package and reduces the oxidation induction time of the finished pipe. The compound does not normally require pre-drying at incoming moisture levels below 0.03 %, but pellets stored in unheated or humid warehouses can develop surface condensation. In such cases, dehumidified-air drying at 70–80 °C for 2–4 h restores feed stability. Hot-air drying above 100 °C creates fused pellet skins and should be avoided.
The feed zone of a grooved-barrel extruder performs differently with bimodal HDPE than with monomodal grades. Because the lower-molecular-weight fraction softens early, barrel temperatures in the first two zones that are set too high can produce premature melting and loss of feed-zone shear. The symptom is a fluctuating melt pressure with a period of 10–30 s and visible surging in the die. The correction is not to reduce screw speed alone but to lower the zone 1 and zone 2 set-points by 5–10 °C and to verify that the feed-throat cooling jacket is holding 40–55 °C.
Melt-pressure stability at the die is a more useful real-time indication than melt temperature alone. On a 36:1 grooved-feed extruder, pressure variations above ±2 % of setpoint are generally visible as wall-thickness oscillation in the downstream ultrasonic gauge. If the oscillation frequency corresponds to the screw rotation period, the cause is usually feed-zone starvation or an oversized first metering zone. If the oscillation is slower, the cause is often a thermal imbalance between die zones.
For outside diameters above 800 mm and SDR 11 wall thicknesses, melt sag between the die exit and the first calibration sleeve is the dominant source of dimensional scrap. The low-sag rheology of HE3495-LS-H reduces the tendency of the upper wall to thin during the molten phase, but it does not eliminate the need for correct vacuum-calibration settings. The first calibration sleeve should be positioned close enough to the die that the pipe enters while the inner wall is still formable. Vacuum levels in the calibration tank are typically maintained between -0.2 bar and -0.6 bar relative to atmospheric pressure, with inlet water temperature controlled at 18–25 °C. If the lower wall cools more slowly than the upper wall, residual vacuum draws the soft inner bore downward, producing a characteristic bore collapse that cannot be corrected by downstream sizing.
Machine-builder technical documentation for large-diameter PE pipe lines commonly specifies multiple calibration sleeves, with the exact number determined by diameter, wall thickness, and cooling capacity. On lines producing OD 1200 mm pipe, staged vacuum and spray cooling are usually required to maintain a through-wall cooling rate that avoids frozen-in stress. Published data for HE3495-LS-H in every pipe diameter is limited, but the formulation’s low-sag behaviour is intended to widen the operating window, not to permit reduced calibration length relative to mechanical design limits.
The hydrostatic design basis for PE100 is established by ISO 9080, and pipe standards such as ISO 4427 and EN 12201 use the resulting design stress. Slow crack growth resistance is assessed by notched pipe testing per ISO 13479. In a notched pipe test, a defined external notch is cut into the pipe wall, and the pipe is pressurised with water at 80 °C; time to failure is used as a relative measure of slow crack growth resistance. Bimodal PE100 grades such as HE3495-LS-H are designed to maintain notch survival times above the minimum specified in ISO 4427 at hoop stresses in the 4.0–4.4 MPa range. This property is relevant when pipe is installed in rocky ground or when external scratches are introduced during handling.
Slow crack growth resistance is not equivalent to impact strength. A pipe with acceptable Charpy impact can still suffer brittle slow crack growth if the resin lacks the high-molecular-weight fraction that bridges crack-tip fibrils. The notched pipe test is therefore a more discriminating quality control tool for PE100 pressure pipe than conventional uniaxial tensile or impact testing.
Material certification for HE3495-LS-H is not limited to the datasheet. Pipe manufacturers must verify that the actual compound lot is listed on a valid third-party product certificate for the target standard, such as EN 12201-1 or ISO 4427. Drinking-water applications additionally require compliance with national hygiene requirements, which may reference European Commission Regulation (EU) No 10/2011 or local implementation documents. Because certificate scope is site-specific, a grade designation alone cannot replace lot-level verification against the certification schedule of the production facility.
The grade carries the standard PE100 classification under ISO 12162, but the classification is not a direct guarantee of pipe performance. The pipe extruder is responsible for selecting the correct SDR for the operating pressure, applying extrusion conditions that preserve the stabiliser system, and performing release testing such as hydrostatic pressure tests and thermal stability tests on finished pipe.
The distinction between HE3495-LS-H and other pipe grades is best summarised by the pressure rating, molecular architecture, and sag behaviour. PE80 remains available for low-pressure systems, but its lower MRS requires thicker walls for the same pressure and diameter. Monomodal PE100 can meet the same MRS, yet may require more careful thermal control during thick-wall extrusion because its melt strength is less formulated for low sag. The comparison below outlines the practical consequences.
| Criterion | HE3495-LS-H | Monomodal PE100 | PE80 |
|---|---|---|---|
| Minimum required strength | 10 MPa | 10 MPa | 8 MPa |
| Molecular architecture | bimodal | monomodal | monomodal |
| Melt sag in thick-wall extrusion | lower | moderate | moderate |
| Slow crack growth resistance | higher | moderate | lower |
| Wall thickness for identical pressure rating | reference | similar | greater |
| Melt temperature sensitivity | moderate | higher | moderate |
Operational boundaries follow from the polyolefin chemistry and the stabiliser system. Continuous exposure to strong oxidising species such as chlorine dioxide or ozone above typical drinking-water residuals requires end-user-specific validation, because oxidative degradation can reduce the effective service life relative to chlorine-free water. Contact with aromatic hydrocarbons, mineral oils, or chlorinated solvents at elevated temperature should be avoided during commissioning and pressure testing, as swelling can reduce the short-term load-bearing capacity. The compound is not designed for repeated service above 60 °C at the maximum design stress; at elevated temperatures the applicable pressure rating must be derated according to the temperature-derating curves in ISO 4427-1.
Because HE3495-LS-H is a black compound, incoming pellet colour is not a reliable indicator of stabiliser content or lot consistency. The relevant release tests remain melt flow rate, density, carbon black dispersion, and oxidation induction time. A single pass through the extruder consumes a portion of the primary antioxidant package, so thermal stability should also be measured on the finished pipe.
Regrind addition is limited by the same release criteria that apply to virgin compound. Clean sprues, swarf, and start-up scrap from the same production line may be reintroduced at a controlled proportion, provided that the resulting pipe meets the same hydrostatic, thermal stability, and organoleptic requirements. Foreign polyolefins, contaminated scrap, or dried-in carbon black masterbatch should be excluded, because they alter the bimodal molecular weight balance and can introduce localised weaknesses that are not visible on the pipe surface.
