HDPE Pipe Extrusion Temperature Settings: Zone-by-Zone Reference for PE100 Production
A zone-by-zone reference table for Hdpe Pipe Extrusion temperature settings, covering the 7-zone barrel baseline, the die-zone + adapter + melt temperature cross-table, and the haul-off + cooling + line speed operating window for PE100 pipe production on a JURRY single screw extruder.
TL;DR
For PE100 pipe production on a JURRY single screw extruder, the zone-by-zone temperature settings read against four windows: a 7-zone barrel baseline (Zone 1 Feed 80-100°C → Zone 7 Adapter 240-260°C), a die-zone + adapter + melt temperature window (melt temp 220-240°C × die 230-260°C × pressure 80-120 bar), a haul-off + cooling + line speed window (haul-off 0.5-15 m/min × vacuum tank 15-25°C × spray 10-20°C × air 20-30°C), and the PE100 thermal property envelope (MFR 0.3-1.5 g/10min × melt point 130-135°C × decomposition 350°C). The full JURRY extruder range for pe100 temperature control covers screw diameters from 25 mm to 150 mm and pairs with the JURRY single screw extruders for pe100 temperature control in the JYH Series single screw extruder family, with JURRY's track record in pe100 temperature control in HDPE pipe production dating back more than two decades.
Why zone-by-zone temperature settings matter for PE100 pipe extrusion
Zone-by-zone temperature settings matter for PE100 pipe extrusion because PE100 carries a higher density, a higher crystallinity, and a narrower melt processing window than LDPE or LLDPE, and the engineering consensus band that holds the polymer melt inside the processing window must be enforced at every barrel zone, at the die, at the adapter, and at the melt probe — not at the heater average. A 1-3°C drift at Zone 7 (Adapter) or at the inner die can move the polymer melt out of the 220-240°C melt processing window and into the surface-defect or degradation zone, and the bench-side defect signal (rough inner wall, melt fracture, surging, or burnt mark) appears within minutes of the drift. Four failure modes account for most of the PE100 zone-by-zone re-runs that the JURRY field team sees on the bench after a temperature profile is set:
- Plasticisation drift at the metering zone. A metering zone (Zone 5) set below 220°C under-plasticises the PE100 pellets and produces a rough inner wall on the pipe; a metering zone set above 240°C over-plasticises the pellets and produces melt fracture on the outer wall. The 220-240°C metering zone window is the engineering consensus band for PE100 pipe extrusion.
- Melt fracture at the die exit. A die exit temperature set above 260°C on the inner die or the outer die pushes the polymer melt past the melt fracture boundary and the surface surface cracks. The 230-260°C die window for PE100 is the engineering consensus band that holds the polymer melt below the melt fracture boundary at the standard PE100 MFR band.
- Rough inner wall at the adapter. An adapter zone (Zone 7) set below 240°C leaves the polymer melt under-heated at the adapter-to-die transition and the inner wall reads rough at the bench-side inspection. The 240-260°C adapter zone window for PE100 is the engineering consensus band that holds the polymer melt uniform at the transition.
- Surging at the feed zone. A feed zone (Zone 1) set above 100°C causes the pellets to partially melt at the feed throat and stick to the screw flights, which interrupts the solids conveying rate and produces a surging flow at the metering zone. The 80-100°C feed zone window for PE100 is the engineering consensus band that prevents premature melting.
All four failure modes have one root cause: the zone-by-zone temperature settings were set on the heater average rather than against the engineering consensus band. The fix is to set every zone against the consensus band and to read the actual melt temperature at the adapter exit with a melt probe. Eric Wang and the JURRY field team run a zone-by-zone commissioning checklist on every new PE100 line.
PE100 material thermal properties — what governs the zone settings
The PE100 material thermal properties govern every zone setting on the JURRY single screw extruder because the engineering consensus band reads against the polymer's melt flow rate, melt point, decomposition temperature, specific heat capacity, and glass transition. The five thermal properties below are the inputs that the zone-by-zone temperature reference reads against; the zone settings are downstream consequences of these inputs.
| Thermal property | PE100 typical value | Engineering significance for zone settings |
|---|---|---|
| Melt Flow Rate (MFR, 190°C/5 kg) | 0.3 - 1.5 g/10 min | Governs the metering zone target. Lower MFR grades need higher metering zone temperature to push the melt through the metering zone; higher MFR grades accept a lower metering zone set point. |
| Melt point (crystalline) | 130 - 135°C | Sets the lower temperature bound for the compression zone (Zone 3) and the metering zone (Zone 5). The melt must cross 130°C before the metering zone to fully plasticise. |
| Decomposition temperature | ~350°C | Sets the upper temperature bound for the metering zone, the adapter, and the die exit. The melt must stay below 350°C to avoid thermal degradation. |
| Specific heat capacity | ~2.3 kJ/kg·K | Governs the energy load per zone. With a specific heat of 2.3 kJ/kg·K, the metering zone must deliver enough energy per kilogram of throughput to push the melt from the compression zone target up to the metering zone target. |
| Glass transition temperature (Tg) | ~ -120°C | Sets the lower temperature bound for the feed zone (Zone 1). Below Tg, the pellets are rigid and brittle; above Tg, the pellets gain rubbery elasticity and feed zone bridging starts to appear above 100°C. |
The five thermal properties above are the engineering consensus for PE100 pipe extrusion. The zone-by-zone temperature reference reads against these five properties; a PE100 grade with MFR outside the 0.3-1.5 g/10 min window needs a custom zone profile that the JURRY field engineering team reviews.
Barrel zone × heater zone cross-table — 7-zone baseline for PE100
The barrel zone × heater zone cross-table is the engineering-collector reference for the 7-zone barrel baseline on a JURRY single screw extruder. The 7-zone baseline covers Zone 1 (Feed), Zone 2 (Feed-Throat Transition), Zone 3 (Compression), Zone 4 (Metering-1), Zone 5 (Metering), Zone 6 (Mixing), and Zone 7 (Adapter), with the heater zone power density banded against the barrel zone to deliver the energy needed at each zone. The cross-table below captures the engineering consensus band for PE100 pipe extrusion.
| Barrel zone | Function | PE100 set-point band (°C) | Heater power density (W/cm²) | Engineering note |
|---|---|---|---|---|
| Zone 1 | Feed | 80 - 100 | 3 - 4 | Pre-heats pellets above ambient; prevents melt bridging |
| Zone 2 | Feed-throat transition | 120 - 150 | 4 - 5 | Crosses the melt onset; pellets begin to compact |
| Zone 3 | Compression | 170 - 200 | 5 - 6 | Full compression; polymer melt fills the flight channels |
| Zone 4 | Metering-1 | 200 - 220 | 5 - 6 | First stable melt; melt temperature approaches metering target |
| Zone 5 | Metering | 220 - 240 | 5 - 6 | Final melt target; PE100 sits at the upper end of the metering window |
| Zone 6 | Mixing | 230 - 250 | 5 - 6 | Mixing section; melt homogenisation |
| Zone 7 | Adapter | 240 - 260 | 4 - 5 | Adapter-to-die transition; melt must be uniform |
The 7-zone barrel baseline above is the engineering consensus for PE100 pipe extrusion on a JURRY single screw extruder. A PE100 grade with MFR at the lower end needs the metering zone (Zone 5) pushed toward 240°C and the adapter zone (Zone 7) pushed toward 260°C; a PE100 grade with MFR at the upper end can sit at the lower end of each band. Eric Wang returns a custom zone profile aligned to the cross-table.
Die zone × adapter × melt temperature cross-table
The die zone × adapter × melt temperature cross-table captures the PE100 die-window temperatures, the adapter-to-die transition temperatures, and the melt temperature window measured at the die inlet. The cross-table below is the engineering consensus band for PE100 pipe production; the melt temperature window is what the extrusion engineer reads at the bench-side melt probe, not the heater set point at the adapter zone (Zone 7).
| Die zone | PE100 set-point band (°C) | Pressure band (bar) | Function |
|---|---|---|---|
| Co-extruder die (inner layer) | 230 - 250 | 80 - 100 | Inner layer of co-extruded PE100 pipe; sets the inner wall surface |
| Inner die (mandrel) | 240 - 260 | 90 - 110 | Mandrel-side die land; sets the inner diameter geometry |
| Outer die | 240 - 260 | 90 - 120 | Die body; sets the outer diameter geometry |
| Sizing sleeve | 80 - 100 | Vacuum 0.3 - 0.6 bar | Vacuum sizing; sets the OD calibration |
| Melt temperature (measured at adapter exit) | 220 - 240 | — | Polymer melt temperature at the die inlet; reads 20°C below the Zone 7 set point under steady state |
The die-zone + adapter + melt temperature cross-table above is the engineering consensus for PE100 pipe production. The melt temperature window (220-240°C) is what the extrusion engineer reads at the bench-side melt probe; this is typically 15-20°C below the Zone 7 heater set point. The JURRY field team documents the Zone 7 set point, the melt probe reading, and the die exit temperature on every commissioning report.
Haul-off × cooling × line speed operating window
The haul-off × cooling × line speed operating window captures the PE100 pipe cooling window, the haul-off speed window, and the line speed window that pair with the 7-zone barrel baseline and the die-zone cross-table. The cooling window reads against the PE100 crystallinity window (the crystallisation temperature of PE100 is approximately 115-120°C); the haul-off and line speed windows read against the cooling window and the extrusion throughput target.
| Operating parameter | PE100 typical value | Engineering note |
|---|---|---|
| Screw speed | 30 - 90 rpm | Sets the throughput target; higher throughput pushes all cooling targets down |
| Melt throughput | 50 - 500 kg/h | Depends on screw diameter (JURRY covers 25-150 mm); higher throughput needs faster haul-off and more cooling |
| Vacuum tank water temperature | 15 - 25°C | First-stage cooling; the pipe enters the tank above the crystallisation temperature |
| Spray cooling water temperature | 10 - 20°C | Second-stage cooling; water mist applied directly to the pipe surface |
| Air cooling zone length | 20 - 30°C ambient | Final cooling; ambient air on the pipe surface |
| Haul-off speed | 0.5 - 15 m/min | Sets the line speed and the pipe wall thickness; pairs with the extrusion throughput target |
| Crystallisation window (PE100) | 115 - 120°C | Sets the cooling rate target; the pipe must cross the crystallisation window before entering the air cooling zone |
The haul-off × cooling × line speed operating window above is the engineering consensus for PE100 pipe production. The vacuum tank water temperature is the first-stage cooling target; the spray cooling water temperature is the second-stage cooling target. The haul-off speed window (0.5-15 m/min) reads against the pipe diameter; a Φ20-63mm small-diameter PE100 pipe runs at the upper end, a Φ500-1200mm large-diameter PE100 pipe runs at the lower end.
3 PE100 pipe diameter × wall thickness case profiles
Three PE100 pipe diameter × wall thickness case profiles illustrate how the 7-zone barrel baseline, the die-zone + adapter + melt temperature cross-table, and the haul-off + cooling window combine on a real production run. The case profiles are generic representations of PE100 pipe production runs that the JURRY field engineering team has supported; the customer names are anonymised because the relevant bench data — pipe diameter, wall thickness, throughput target, and grade MFR — is production-line-specific rather than customer-specific.
- Φ20-63mm small-diameter thin-wall PE100 pipe. The production line is a small-diameter PE100 pipe line running at 0.5-3.0 m/min haul-off with a 25-65 mm screw diameter extruder. The 7-zone barrel baseline reads at the lower end of the metering zone band (220-230°C) and at the lower end of the adapter band (240-250°C); the die-zone cross-table reads at the lower end of the inner die band (240-250°C) and at the lower end of the outer die band (240-250°C); the melt temperature window sits at the lower end of the 220-230°C band. The haul-off × cooling window runs at the upper end of the haul-off speed window (2.5-3.0 m/min) and at the lower end of the vacuum tank water temperature band (15-18°C). The small-diameter PE100 pipe is the most common PE100 production profile and the 7-zone baseline applies directly.
- Φ110-315mm medium-diameter standard-wall PE100 pipe. The production line is a medium-diameter PE100 pipe line running at 0.5-5.0 m/min haul-off with a 65-90 mm screw diameter extruder. The 7-zone barrel baseline reads at the upper end of the metering zone band (230-240°C) and at the upper end of the adapter band (250-260°C); the die-zone cross-table reads at the upper end of the inner die band (250-260°C) and at the upper end of the outer die band (250-260°C); the melt temperature window sits at the upper end of the 230-240°C band. The haul-off × cooling window runs at the middle of the haul-off speed window (1.5-3.0 m/min) and at the middle of the vacuum tank water temperature band (18-22°C). The medium-diameter PE100 pipe is the standard PE100 production profile for water and gas distribution.
- Φ500-1200mm large-diameter thick-wall PE100 pipe. The production line is a large-diameter PE100 pipe line running at 0.3-1.5 m/min haul-off with a 90-150 mm screw diameter extruder. The 7-zone barrel baseline reads at the upper end of the metering zone band (235-240°C) and at the upper end of the adapter band (255-260°C); the die-zone cross-table reads at the upper end of the inner die band (255-260°C) and at the upper end of the outer die band (255-260°C); the melt temperature window sits at the upper end of the 230-240°C band. The haul-off × cooling window runs at the lower end of the haul-off speed window (0.3-1.0 m/min) and at the upper end of the vacuum tank water temperature band (22-25°C). The large-diameter PE100 pipe is the long-haul water transmission profile and the haul-off × cooling window is the gating parameter because the cooling gradient must be matched to the thick wall section.
All three case profiles above read from the same 7-zone barrel baseline, the same die-zone + adapter + melt temperature cross-table, and the same haul-off × cooling × line speed operating window. The production-line-specific inputs change (pipe diameter, wall thickness, throughput target, grade MFR), and the engineering consensus band shifts inside the cross-table to match the input. The cross-tables are portable across PE100 production lines; the production-line-specific inputs are not.
5 process traps when running PE100 on a JURRY single screw extruder
Five process traps account for most of the PE100 pipe extrusion re-runs that the JURRY field engineering team sees on the bench after the zone profile is set. The traps sit on the production run, not on the bench; catching them at the commissioning stage removes them from the rework loop after the production line goes live:
- Ignoring the Zone 1 pre-heat setting. A Zone 1 set above 100°C causes the pellets to partially melt at the feed throat and stick to the screw flights; a Zone 1 set below 80°C leaves the pellets under-heated and pushes the energy load to Zone 2 and Zone 3. The Zone 1 setting must be inside the 80-100°C band and the production run must monitor the feed throat temperature during the start-up sequence.
- Substituting the LDPE zone profile for PE100. A LDPE zone profile (typically with a metering zone at 180-200°C and an adapter zone at 200-220°C) pushed directly into PE100 production under-plasticises the PE100 pellets and produces a rough inner wall. The PE100 zone profile must use the metering zone 220-240°C band and the adapter zone 240-260°C band; an LDPE profile is not interchangeable.
- Ignoring the melt temperature probe calibration. A melt temperature probe that reads 5-10°C off the true melt temperature (due to probe drift, probe location, or probe response time) hides a zone-by-zone drift inside the apparent melt temperature window. The melt temperature probe must be calibrated against a known melt standard before each production run, and the probe reading must be cross-checked against the Zone 7 (Adapter) heater set point under steady state.
- Ignoring the haul-off + cooling synchronisation. A haul-off speed set faster than the cooling window can support produces internal stresses in the pipe wall (visible as warp or ovality at the bench-side inspection); a haul-off speed set slower than the cooling window allows produces a thick wall section that drifts out of the SDR spec. The haul-off speed and the cooling window must be synchronised against the throughput target and the pipe diameter.
- Ignoring the cooling gradient at the crystallisation window. A cooling gradient that drops the pipe wall temperature too fast through the 115-120°C crystallisation window produces a non-uniform crystalline structure and reduces the long-term hydrostatic strength of the pipe. The cooling gradient must be matched to the pipe wall thickness and the throughput target.
These five traps are the production-run-side mirror of the 7-zone barrel baseline, the die-zone + adapter + melt temperature cross-table, and the haul-off × cooling × line speed operating window. The 7-zone baseline names the engineering consensus band for the barrel; the die-zone cross-table names the engineering consensus band for the die and the melt; the haul-off × cooling window names the engineering consensus band for the cooling; the five traps are the production-run omissions that break all three cross-tables at once.
CTA — request a PE100 zone-by-zone commissioning report from JURRY
Eric Wang and the JURRY field engineering team review the PE100 production line against the 7-zone barrel baseline, the die-zone + adapter + melt temperature cross-table, and the haul-off × cooling × line speed window on a per-line basis. For a PE100 zone-by-zone commissioning report, submit the pipe diameter, the wall thickness, the throughput target, the grade MFR, and the haul-off speed target through the JURRY inquiry page to request a custom zone profile, and the JURRY field engineering team returns a commissioning report with the zone set points, the melt probe readings, and the cooling window documented on a per-zone basis inside two working days.
FAQ — three questions PE100 pipe production engineers ask the JURRY team most often
Q1. What is the core difference in zone temperature settings between PE100 and PE80 pipe extrusion?
A1. The core difference between PE100 and PE80 pipe extrusion in zone temperature settings sits in the higher melt temperature window that PE100 demands at the metering zone and at the die exit, because PE100 carries a higher density (0.948-0.954 g/cm³ for PE100 vs 0.918-0.930 g/cm³ for PE80 at room temperature), a higher crystallinity, and a narrower melt processing window that forces the metering zone and the die zone to run at the upper end of the HDPE temperature window. PE80 zones typically run with a metering zone (Zone 5) of 200-220°C and an adapter zone (Zone 7) of 220-240°C; PE100 zones run with a metering zone (Zone 5) of 220-240°C and an adapter zone (Zone 7) of 240-260°C. PE100 also runs hotter at the die exit, typically 230-260°C at the inner die vs 220-240°C at the inner die for PE80. The narrower melt processing window for PE100 is the source of the higher temperature demand at the metering and die zones; a PE80 zone profile pushed directly into PE100 production will under-melt the PE100 pellets and produce a rough inner wall on the pipe.
Q2. Why is the zone 1 (feed) temperature set so low (80-100°C) in PE100 extrusion?
A2. The zone 1 (feed) temperature is set at 80-100°C in PE100 extrusion because the feed zone serves a dual function: it pre-heats the PE100 pellets above ambient to stabilise the solids conveying rate, and it prevents premature melting at the feed port that would otherwise cause melt bridging, surging, and unstable throughput. Setting zone 1 above 100°C in PE100 production causes the pellets to partially melt at the feed throat and stick to the screw flights, which interrupts the solids conveying rate and produces a surging flow at the metering zone. Setting zone 1 below 80°C leaves the pellets under-heated and increases the energy load on zones 2 and 3 to bring the melt up to the metering zone target temperature, which can push zones 2-3 past the upper temperature limit and risk thermal degradation. The 80-100°C zone 1 window for PE100 is the engineering consensus band that balances the pre-heating function against the bridging prevention function, and JURRY single screw extruders are set up with a separately controlled feed-zone heater that holds the 80-100°C window across the production run.
Q3. How does the melt temperature 220-240°C window relate to the barrel zone settings in PE100 pipe production?
A3. The melt temperature 220-240°C window in PE100 pipe production is the polymer melt temperature measured at the adapter exit (Zone 7) and at the die inlet, and it sits inside the metering zone (Zone 5) and the adapter zone (Zone 7) barrel temperature settings as a downstream consequence of those zones. The barrel zone settings at Zone 5 (220-240°C) and Zone 7 (240-260°C) carry the energy that drives the polymer melt up to the 220-240°C melt temperature window; the melt temperature window itself is what the extrusion engineer reads at the bench-side melt probe or the die-inlet thermocouple. The two are not the same measurement: barrel zone settings are the heater set points on the barrel jacket, while the melt temperature window is the actual polymer melt temperature inside the flow channel. A typical PE100 production run holds the Zone 5 set point at 220-240°C and the Zone 7 set point at 240-260°C to deliver a melt temperature at the die inlet of 220-240°C, which is the engineering consensus for PE100 pipe extrusion.
Need a PE100 zone-by-zone commissioning report for a HDPE pipe production line?
Most specification requests receive a written reply from Eric Wang or a JURRY field engineer inside two working days. Submit the pipe diameter, the wall thickness, the throughput target, the grade MFR, and the haul-off speed target, and the JURRY field engineering team will return a commissioning report with the zone set points, the melt probe readings, and the cooling window documented on a per-zone basis.
Sources referenced: PlasticsEurope polymer processing reference · Plastics Industry Association extrusion standards · PE100+ Association PE100 pipe performance · Pipelife international pipe manufacturing reference · DIN industrial standard for plastic pipe extrusion · Engineering Toolbox polymer thermal property data · Kunststoffe plastic extrusion industry reference