With the increasing demand for building energy conservation, plastic floor heating pipes have become the core material of floor heating systems due to their corrosion resistance and strong flexibility. The plastic floor heating pipe production line uses PERT, PEX, and PB as the production objects of three mainstream pipes, and realizes the automatic manufacturing of pipes through extrusion molding process. The new generation of production lines developed by SHARC Machinery Company focuses on high efficiency and energy saving. Its production capacity is 30% higher than that of traditional equipment, and its energy consumption is reduced by 25%. It is suitable for pipe diameters ranging from 16-63mm to meet the differentiated needs of residential and commercial buildings.
Technical characteristics of mainstream pipe production lines
PERT floor heating pipe production line
Materials and specifications: Using PERT particles as raw materials, it can produce 16-63mm single-layer, double-layer (PERT II) and multi-layer structure pipes, and the typical machine model runs at a speed of 15-35m/min.
Core models:
Single-layer PERT pipe machine: suitable for basic floor heating system, with significant cost advantage;
EVOH oxygen-barrier PERT pipe machine (3-layer/5-layer): prevent oxygen from penetrating into the system through the EVOH barrier layer, extending the life of the equipment;
PERT-AL-PERT five-layer composite pipe machine: the aluminum layer enhances the pressure resistance and is suitable for high-pressure heating scenarios.
Performance advantages and disadvantages:
Advantages: moderate price, easy to bend (quick relaxation of bending stress), low temperature resistance (brittle temperature – 70℃), recyclable;
Disadvantages: heat resistance is slightly inferior to PEX and PB, and the long-term use temperature is recommended to be ≤60℃.
PEX floor heating pipe production line
Technical highlights: the cross-linking process is used to improve the performance of the pipe, the pipe diameter covers 16-32mm, and common models include PEXa and PEXb production lines.
Structural innovation:
Three-layer PEXb-EVOH oxygen barrier pipe: EVOH is compounded through the adhesive layer to block oxygen penetration;
Five-layer PEXb-AL-PEXb composite pipe: The aluminum layer has both oxygen barrier and rigidity enhancement, and the bursting pressure can reach 60Kg/C㎡.
Performance advantages:
Wide temperature resistance range (-70℃~110℃), strong anti-aging ability (service life ≥50 years);
The whole pipe has no joint design to eliminate the risk of leakage;
Disadvantages: The price is higher than PERT, and it cannot be hot-melt connected, and special pipe fittings are required.
PB floor heating pipe production line
Material characteristics: PB particles are used as raw materials, the pipe diameter is 16-32mm, the running speed is 15-35m/min, and it is equipped with a single-screw extruder and a multi-layer molding mold.
Performance advantages:
Temperature resistance range – 30℃~100℃, excellent frost resistance;
Flexibility is 1/60 of metal pipes, low thermal expansion coefficient, reducing the risk of interface leakage;
Food grade material, non-toxic and harmless, service life can reach 50-100 years;
Disadvantages: The market price is relatively high, and long-term use requires regular inspection of aging.
Core configuration and process flow of the production line
Composition of key equipment
Extrusion system: single screw extruder (temperature control accuracy ±1℃), adapted to different raw material melt indexes;
Molding system: multi-layer co-extrusion mold, vacuum shaping tank (cooling water temperature control 5-15℃);
Post-processing equipment: traction machine (speed synchronization accuracy ±0.5%), cutting machine (length error ≤1mm), winding machine (roll diameter adjustable 500-1500mm).
Production process flow
Raw material pretreatment: PERT/PEX/PB resin is mixed with antioxidant and masterbatch in proportion, and then dried to remove moisture;
Extrusion molding: The raw materials are melted and extruded at 180-230℃, and the tube is formed through the mold. The temperature fluctuation must be controlled within ±5℃;
Cooling and shaping: Vacuum spraying or immersion cooling makes the tube solidify quickly and maintain roundness (ovality ≤5%);
Online detection: The laser diameter gauge monitors the tube diameter and wall thickness in real time (accuracy ±0.05mm), and the visual system detects surface defects;
Finished product processing: Cut into fixed-length tubes or wind into rolls according to needs, and perform pressure testing before packaging (test pressure 1.5MPa, pressure maintenance for 30min without leakage).
Technology comparison and market application orientation
| Pipe Type | Temperature Range | Typical Application Scenarios | Production Line Investment Cost | Maintenance Difficulty |
| PERT | -70℃~60℃ | Civilian residences, ordinary commercial buildings | Low | Easy |
| PEX | -70℃~110℃ | High temperature heating, industrial pipelines | Middle | Middle |
| PB | -30℃~100℃ | High-end residential and medical facilities | High | High |
Industry trends and technology upgrades
Current production lines are moving towards intelligence, such as integrated PLC intelligent control system (fault warning response time ≤0.1s), remote operation and maintenance module (support mobile phone APP monitoring production data). Future technological breakthroughs will focus on:
Optimization of multi-layer co-extrusion technology to improve the bonding strength between the oxygen barrier layer and the substrate;
Application of bio-based materials, development of degradable PERT raw materials to reduce environmental load;
High-speed extrusion process, the goal is to increase the production speed to more than 50m/min to meet the needs of large-scale projects.