Pipe Testing Equipment Optimized for 5000‑Cycle Hot‑Cold Alternating Pressure‑Temperature Cycle Test of Plastic Pipes & Fittings
Summary:
Serving as a long‑term service‑lifetime verification assessment, this test scheme requires one full assembly of plastic pipeline system specimens to finish 5,000 alternating hot‑and‑cold water circulation cycles. One complete cycle lasts for 30 minutes, split into a 15‑minute cold‑water circulation segment followed by another 15‑minute hot‑water circulation segment. These rigorous assessment criteria place stringent demands on test hardware regarding non‑stop continuous operation capability and consistent, reproducible performance output.
Custom‑engineered by our manufacturing plant for a reputable European brand, this test unit is fully constructed to satisfy European technical specifications. Extensive years of on‑site operation across European markets have verified its reliable track record free of technical malfunctions and quality‑related flaws.
Four primary functional sub‑assemblies make up the overall system: cold‑water exchange actuation module, hot‑water exchange actuation module, specimen test enclosure and industrial cooling chiller. It boasts sophisticated visual appearance, modular mechanical configuration, cutting‑edge control logic, dependable runtime performance, solid construction quality and an intuitive user‑centered operating interface.
Instrument Features:
Full Closed-Loop Control Architecture
Equipped with an imported full digital control system, this testing device achieves high-precision closed-loop pressure regulation for the entire pipeline testing circuit. During ongoing test procedures, the system automatically calibrates the operating status of main circulating pumps and regulating valves based on real-time collected data including fluid temperature, test duration and pipeline flow velocity. This intelligent adjustment maintains balanced and stable internal pressure across the whole testing system. The unique structural design successfully prevents water hammer risks during rapid switching between hot and cold water circulation modes, with overall operational performance exceeding the requirements of applicable national industry standards.
Intelligent Cycle-Transition Mechanism
The system control platform adopts real-time data monitoring covering sample pipeline inlet and outlet water temperature, liquid level status of cold and hot water tanks, as well as mode switching time parameters to achieve automatic system state adjustment. When completing cycle switching, the system precisely controls the return valves of dual water tanks to guide most cold water back to the cold water tank. The temperature difference between the cold and hot water tanks is strictly controlled within 3°C, effectively reducing overall energy consumption and realizing energy-saving operation during long-duration uninterrupted system testing.
Low-Noise Performance Enhancement
The test pipeline system is embedded with an independently developed water flow control component. This customized structural design effectively weakens operational noise generated by high-speed water flow scouring and friction inside the pipeline, delivering low-noise and stable test operating conditions.
High-efficiency Refrigeration Configuration
This system adopts premium imported industrial chillers as the core low-temperature cooling source. Adopting mature water-to-water cooling technology, the system optimizes the operating state of the compressor and keeps it running within the optimal working range at all times. This design not only significantly improves the overall refrigeration efficiency of the equipment but also effectively reduces unit operating loss and greatly extends the overall service life of industrial chillers.
Meet standards:
1.ISO 10508: Governing specifications for thermoplastic pipes and fittings deployed within hot‑cold water service networks
2.ISO 19893: Plastics piping systems — Thermoplastic pipes and fittings for hot and cold water — Testing procedure to evaluate temperature‑cycling resistance of pre‑assembled piping assemblies
3.GB/T 19993‑2005: Thermal cycling test procedure for hot‑melt‑joined plastic water supply & drainage piping and joint assemblies
4.GB/T 18997.1‑2003: Aluminium‑plastic composite pressure pipes — Part 1: Aluminium‑plastic pipes featuring lap‑welded aluminium liners
5.GB/T 18997.2‑2003: Aluminium‑plastic composite pressure pipes — Part 2: Aluminium‑plastic pipes with butt‑welded aluminium tubing
6.GB/T 18742.2‑2002: Polypropylene piping systems for hot and cold water applications — Part 2: Pipe raw materials
7.GB/T 18742.3‑2002: Hot‑cold water polypropylene piping systems — Part 3: Connecting fittings
8.GB/T 18992.2‑2003: Hot‑cold water systems adopting cross‑linked polyethylene (PE‑X) pipe materials — Part 2: Pipe base materials
9.GB/T 18993.2‑2003: Chlorinated polyvinyl chloride (PVC‑C) piping systems for hot and cold water — Part 2: Pipe raw materials
10.GB/T 18993.3‑2003: Chlorinated polyvinyl chloride (PVC‑C) piping systems for hot and cold water — Part 3: Fitting components
11.GB/T 18991‑2003: Thermoplastic pipes and fittings intended for hot‑and‑cold water circulating systems
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Project
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Index
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Pressure
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Control range
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0.40 Mpa ~1.20 Mpa
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Control accuracy
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Set value ±0.02 mpa (including cold-to-hot switching process)
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Test stations
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1–6
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Maximum total measured cross-sectional area
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6200 mm² (2 × φ63); can be customized upon request.
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Circulation time for both hot and cold water
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Any setting between 600s and 1800s
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Time for alternating hot and cold water
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≤60s
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Number of cycles
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Any number of times from 0 to 100,000
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Maximum length of the straight pipe section in the sample
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3700mm
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Display mode
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Touch screen display
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Control method
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Plc control
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Velocity of flow
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>0.9m/s
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Headwaters
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Water quality
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Pure water, deionized water, or softened water
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Automatic water supply pressure
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＞0.05mpa
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Temperature display reading error
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±0.2℃
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Temperature difference between the inlet and outlet of the sample
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＜2℃
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Cold water storage cistern
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Temperature control range
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20°c to room temperature (room temperature> 20°c)
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Temperature control accuracy
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Set value ±0.5°c
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Temperature homogeneity
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±0.5℃
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Hot water tank
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Temperature control range
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Room temperature to 95°c
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Temperature control accuracy
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Set value ±0.5°c
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Temperature homogeneity
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±0.5℃
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Source
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380(1-15%)vac～380(1+10%)vac 50hz 25kw
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Outline dimension
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L5200 mm × W3200 mm × H2100 mm
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Installation size
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L6000 mm × W4000 mm × H3000 mm
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Total weight
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3210kg
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