Advanced Pipe Testing Equipment for Plastic Pipe Pressure‑Temperature Cycle Test to Detect Structural Defects & Leakage Failures
Summary:
Developed to satisfy official standard specifications, this full‑scale test system evaluates the overall performance of assembled pipeline units constructed from various plastic pipes and matching fittings. Throughout the test procedure, pipeline specimens are subjected to pre‑set internal pressure while undergoing repetitive hot‑cold thermal shock alternations over a defined testing duration. Upon completion of the specified cycle count, operators carry out visual examination on test specimens to detect failure phenomena such as medium leakage and structural fracture.
Categorized as a long‑term durability verification test, this testing scheme requires one set of assembled plastic pipeline specimens to complete 5,000 hot‑cold water alternating circulation cycles. Every full cycle lasts 30 minutes, consisting of a 15‑minute cold‑water circulation segment followed by a 15‑minute hot‑water circulation segment. These stringent testing prerequisites place high demands on the device’s continuous operating capacity and consistent performance delivery. This test system is custom‑developed in‑house for a reputable European brand and fully complies with European technical specifications. Multiple years of on‑site operation and real‑world usage across European markets have proven its trouble‑free operating track record.
Four major functional modules constitute the complete system: cold‑water exchange actuation module, hot‑water exchange actuation module, specimen test chamber and industrial chiller. It delivers sophisticated outward appearance, modular mechanical framework, cutting‑edge control logic, stable operational status, reliable construction quality and user‑friendly human‑machine interaction experience.
Instrument Features:
Patented Open‑Frame Structural Design
High‑temperature and high‑pressure water flows only within test specimens and their matched connecting pipelines. The device adopts an atmospheric‑pressure tank design, with all other circulating piping operating under atmospheric pressure. Key components including valve groups and sensors function under normal‑pressure conditions, which safeguards long‑term reliable operation of the entire system. This distinctive structural approach is protected by an official technical patent.
Full Closed‑Loop Control System
Fitted with an imported fully‑digital control platform, this test system achieves closed‑loop high‑accuracy adjustment for internal pressure across the entire test piping circuit. During operation, the controller dynamically adjusts main circulating pumps and regulating valves based on real‑time feedback metrics including fluid temperature, operating duration and pipeline flow rate, to maintain consistent internal pressure across the whole system. This structural design efficiently eliminates water‑hammer risks even during rapid hot‑cold water flow switching, with overall performance exceeding national standard requirements.
Intelligent Cycle Switching Logic
The controller dynamically adjusts operating status by processing real‑time monitoring data, such as inlet‑outlet water temperature of sample pipelines, liquid levels of cold‑ and hot‑water tanks, and timing parameters for hot‑cold mode switching. When cycle switching occurs, it automatically drives the return valves of both tanks to divert most cold water back to the cold‑water tank. The temperature difference between the two tanks is strictly limited to below 3 °C, enabling extremely low energy consumption during long‑duration continuous operation.
Optimized Low‑Noise Performance
A proprietary in‑house developed water flow regulator is installed on test pipelines, which drastically reduces operating noise generated by scouring from high‑speed fluid flow.
High‑Efficiency Refrigeration Setup
Imported industrial chillers act as the low‑temperature cold source. Water‑to‑water cooling technology is adopted to boost refrigeration efficiency and maintain compressors within their optimal working range. This configuration improves overall cooling output and greatly extends the service life of industrial chiller components.
Meet standards:
Compliant with ISO 10508, ISO 19893, GB/T 19993‑2005, GB/T 18997.1‑2003, GB/T 18997.2‑2003, GB/T 18742.2‑2002, GB/T 18742.3‑2002, GB/T 18992.2‑2003, GB/T 18993.2‑2003, GB/T 18993.3‑2003, GB/T 18991‑2003.
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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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List of Main Component Configurations:
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Name
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Quantity
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Industrial touchscreen computer
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1 unit
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Cold water storage cistern
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1 unit
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Hot water tank
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1 unit
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Test chamber
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1 set
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Preloading Device
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6 sets
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Centrifugal pump of multistage type
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1 set
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Pneumatic solenoid valve
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4
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In-line pump
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1 set
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Fixtures
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63.5 half-ring
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1 set
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60.3 half-ring
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1 set
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54 semi-ring
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1 set
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40 half-ring
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1 set
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35 semi-ring
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1 set
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28 semi-ring
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1 set
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22 half-ring
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1 set
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18 semi-ring
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1 set
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15 semi-ring
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1 set
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