Pipe Testing Equipment for Standard Pressure‑Temperature Cycle Test of Plastic Pipes and Fittings
Summary:
1. Classified as a long‑term service‑life validation test, this protocol mandates that a complete set of plastic pipeline system specimens undergo 5,000 cycles of hot‑cold water alternating circulation. Each full cycle takes 30 minutes in total, comprising 15‑minute cold‑water circulation phase and subsequent 15‑minute hot‑water circulation phase. Such test conditions impose high requirements on test hardware for sustained uninterrupted running capacity as well as steady, repeatable performance output. Purpose‑built by our factory for a well‑known European brand, this test unit is fully engineered in accordance with European technical specifications. Multiple‑year field deployments within European markets have proven its fault‑free running record without technical breakdowns or quality‑related defects.
2. The system comprises four key functional assemblies: cold‑water exchange actuation module, hot‑water exchange actuation module, specimen test enclosure and industrial cooling chiller. It delivers refined exterior styling together with modular mechanical layout, state‑of‑the‑art control algorithms, stable runtime behaviour, robust build quality and straightforward, user‑oriented operation interface.
Instrument Features:
Full Closed‑Loop Control Architecture
Featuring an imported all‑digital control platform, this test unit realizes closed‑loop high‑accuracy internal pressure modulation for the complete piping test circuit. In the course of testing, the main circulating pump and regulating valves get dynamically tuned by the control platform according to real‑time feedback of fluid temperature, elapsed runtime and pipeline flow velocity, so as to sustain uniform system‑wide internal pressure. This structural configuration effectively avoids water‑hammer hazards even under fast hot‑cold fluid mode alternation, whose comprehensive performance outperforms the criteria laid down by relevant national standards.
Intelligent Cycle‑Transition Mechanism
Leveraging real‑time monitoring signals covering inlet & outlet water temperature of sample pipelines, liquid levels of cold‑hot water reservoirs and mode‑switch timing parameters, the control platform autonomously modifies system working states. It intelligently governs the return‑path valves for both reservoirs, diverting most cold‑phase fluid back into the cold‑water tank upon cycle transition. Temperature deviation between the two tanks is rigorously confined within 3 °C, bringing about remarkably low energy expenditure during prolonged continuous system runs.
Low‑Noise Performance Enhancement
A self‑developed in‑house water‑flow regulating component is integrated onto the test piping loop, which greatly suppresses acoustic noise triggered by high‑velocity fluid scouring effects.
High‑efficiency Refrigeration Configuration
Imported industrial chillers serve as the low‑temperature cold source for this system. Water‑to‑water cooling technique is implemented to elevate refrigeration efficiency and keep compressors functioning within their optimal operating envelope. Such arrangement brings higher overall cooling capacity and notably prolongs the service lifespan of the industrial chiller hardware.
Meet standards:
ISO 10508: Relevant regulations for thermoplastic pipes and fittings used in hot and cold water systems
ISO 19893: Plastics piping systems — Thermoplastics pipes and fittings for hot and cold water — Test method for the resistance of mounted assemblies to temperature cycling
GB/T 19993‑2005: Test Method for Thermal Cycling of Hot‑Melt Plastic Water Supply and Drainage Pipe Systems and Pipe Joint Systems
GB/T 18997.1‑2003: Aluminum‑Plastic Composite Pressure Pipe – Part 1: Aluminum‑Plastic Pipe with Overlap Welding of Aluminum Tube
GB/T 18997.2‑2003: Aluminum‑Plastic Composite Pressure Pipe – Part 2: Aluminum Pipe Joint‑Welded Aluminum‑Plastic Pipe
GB/T 18742.2‑2002: Polypropylene Pipeline Systems for Hot and Cold Water – Part 2: Pipe Materials
GB/T 18742.3‑2002: Hot and Cold Water Polypropylene Pipeline Systems Part 3: Fittings
GB/T 18992.2‑2003: Hot and Cold Water Systems Using Cross‑linked Polyethylene (PE‑X) Pipe Materials – Part 2: Pipe Materials
GB/T 18993.2‑2003: Chlorinated polyvinyl chloride (PVC‑C) pipeline systems for hot and cold water – Part 2: Pipe materials
GB/T 18993.3‑2003: Chlorinated polyvinyl chloride (PVC‑C) pipeline systems for hot and cold water – Part 3: Fittings
GB/T 18991‑2003: Thermoplastic plastic pipes and fittings for hot and cold water 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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