High‑Output Vacuum Calibration HDPE Jacket Pipe Extrusion Line for District Heating Pipe

The 110-2200mm Vacuum Calibration HDPE Jacket Pipe Extrusion Line is a high-precision, fully automatic plastic pipe extrusion machine specially engineered for manufacturing HDPE outer protective casing for PU foam pre-insulated pipelines. Featuring core vacuum calibration table technology, this HDPE jacket pipe extruder controls pipe wall thickness tolerance within ±0.1mm while HDPE remains molten. This key vacuum sizing technology outperforms ordinary plastic extrusion equipment and ensures seamless, firm adhesion between HDPE jacket pipe and PU foam thermal insulation layer.

This HDPE casing extrusion equipment is widely adopted for district heating networks, buried chilled water pipelines and underground thermal insulation pipeline projects in Russia, Central Asia, the Middle East and Africa. We offer 7 standard machine models, supporting production for high-temperature heating pipes up to 120°C and low-temperature chilled water pipelines on one flexible production platform.

Equipped with dust-free planetary cutting unit, this vacuum calibration HDPE jacket pipe extrusion line removes plastic scraps and cutting dust at source to maintain clean workshop conditions throughout extrusion and cutting procedures. Finished HDPE jacket casing fully meets international standards EN253, EN14241 and GB/T29047, delivering tight dimensional tolerance, smooth inner and outer pipe surfaces, and long-term mechanical protection for buried pre-insulated heating pipelines.

It perfectly integrates with complete HDPE casing + PU foam pre-insulated pipe production workflow. The vacuum calibration pipe extrusion line maintains stable production capacity from 250-1350kg/h with ±0.1mm ultra-precise wall thickness control. Consistent pipe dimension ensures reliable bonding with polyurethane foam insulation, enhancing structural stability and extending service life of district heating and chilled water pre-insulated pipelines. With 21 years of R&D and manufacturing expertise, Qingdao Huashida has delivered over 389 sets of HDPE jacket pipe extrusion lines across more than 60 countries, trusted by global pre-insulated pipe manufacturers and pipeline EPC contractors.

Peak output reaches 1350kg/h for PE-1155/2200 model, the maximum throughput machine for large diameter 1155-2200mm district heating and chilled water pre-insulated HDPE casing pipe manufacturing. All parameters are for reference only. Machine configuration can be customized according to client's district heating and chilled water pipe manufacturing requirements.

This fully automatic vacuum calibration HDPE jacket pipe extrusion line acts as core supporting machinery for PU foam pre-insulated pipe production, offering continuous, high-efficiency HDPE casing pipe manufacturing with fully customizable setup:

• Vacuum Loader: Automatic PE pellet feeding to guarantee stable raw material supply for high-output HDPE jacket pipe production
• Hopper Dryer: Eliminates moisture from PE raw material, stabilizes melt quality and prevents pipe surface defects
• High-Efficiency Single Screw Extruder: High torque extrusion compatible with virgin and recycled HDPE material, delivering 250-1350kg/h stable output
• Precision Vacuum Calibration Table: Core machine component, vacuum sizing system realizes ±0.1mm ultra-precise dimension accuracy for perfect fitting with PU insulation foam
• Water Spraying Cooling Tank: Multi-stage circulating cooling to stabilize pipe forming and ensure uniform pipe structure after vacuum calibration
• Synchronized Hauling Machine: Adjustable traction speed matching all pipe diameters to maintain consistent HDPE jacket pipe forming quality
• Dust-Free Planetary Cutting Machine: Chipless and dust-free cutting preserves calibrated pipe dimensions, eliminating secondary cleaning work
• Discharging Frame: Automatic pipe unloading and neat stacking for easy storage and transportation

All units coordinate with the vacuum calibration table to stably produce 110-2200mm HDPE jacket pipe, fully matching the production efficiency of HDPE casing + PU foam district heating and chilled water pre-insulated pipe systems.

This one-time forming technology enables single-operator intelligent operation, high productivity and low raw material loss. One-time forming removes edge trimming steps, reduces raw material waste, cuts production cost and boosts extrusion efficiency for mass pre-insulated HDPE jacket pipe manufacturing.

• Precision Vacuum Calibration System: ±0.1mm wall thickness tolerance by high-precision vacuum sizing, meets EN253 and GB/T29047 international standards and ensures tight bonding of HDPE casing and PU foam insulation
• 110-2200mm Full Diameter Coverage: 7 standard models cover small, medium and extra-large HDPE jacket pipe to satisfy all district heating and chilled water pre-insulated pipe specifications without extra machine investment
• High & Stable Production Output: Maximum 1350kg/h throughput resolves production bottlenecks to fulfill large municipal heating and chilled water infrastructure project orders
• Dust-Free Eco-Friendly Cutting: Planetary cutting technology prevents plastic dust pollution, improves workshop safety and reduces post-processing workload
• Compact Space-Saving Layout: 26-45m adjustable line design adapts to different factory workshops, saving floor area without sacrificing production capacity
• Labor-Saving Full Automation: PLC centralized intelligent control supports single-person operation, cutting labor cost and minimizing manual errors
• Low Production Operating Cost: Compatible with recycled HDPE material plus zero-trimming one-time forming, improving raw material utilization rate and lowering per-unit pipe manufacturing cost

• One-Stop Pre-Insulated Pipe Production Solution: Custom workshop layout design, machine installation, commissioning and operator training for complete HDPE casing + PU foam pre-insulated pipe lines
• Global Field-Proven Project Experience: More than 389 running vacuum calibration HDPE jacket pipe extrusion lines worldwide, with mature applications for heating and chilled water projects in Russia, Central Asia, Middle East and Africa
• Professional R&D Engineering Support: Senior engineering team and expert workstation to provide personalized equipment customization and production process optimization

Founded in 2003, Qingdao Huashida Machinery Co., Ltd. is a high-tech manufacturer with 21 years of experience in vacuum calibration HDPE jacket pipe extrusion lines, pre-insulated pipe production machinery and pipeline anti-corrosion equipment. We own multiple national patents and ISO 9001 / ISO 14001 / ISO 45001 / CE international certifications.

We focus on R&D and manufacturing of thermal insulation pipeline machinery and plastic extrusion equipment. Huashida has exported more than 500 sets of machinery to over 60 countries and regions, supplying full-lifecycle customized solutions and 24-hour online after-sales technical support for district heating projects, chilled water pipe manufacturers and pipeline EPC contractors globally.