Pressure testing process after installation of PPR pipe fittings

Pre-Test Preparation Requirements

All newly installed PPR systems must undergo:

24-hour curing period after final joint fusion

Visual inspection of all connections

Complete filling and air bleeding

Temporary support installation for test pressure conditions Documentation should include pipe specifications, fusion parameters, and system diagrams.

 

Test Medium Selection Criteria

Acceptable test fluids:

Clean water (preferred, temperature 5-45°C)

Compressed air (limited to 1.5× working pressure) Special cases:

Glycol mixtures for frost protection systems

Inhibited water for heating systems Contamination standards: <5mg/L suspended solids, pH 6.5-8.5.

 

Pressure Grading Procedures

Standard test sequence:

Initial pressurization to 50% test pressure

15-minute stabilization period

Gradual increase to full test pressure

Minimum 1-hour observation period Pressure increments shouldn't exceed 0.5 bar/second.

Test Pressure Parameters

Standard requirements:

Cold water systems: 1.5× working pressure

Hot water systems: 2.0× working pressure (at 20°C) Minimum test values:

PN10: 1.5MPa

PN16: 2.4MPa

PN20: 3.0MPa Test duration: 2 hours minimum for systems <100m.

 

Leak Detection Methods

Comprehensive evaluation techniques:

Visual inspection (mirrors for concealed pipes)

Pressure drop measurement (±0.05 bar tolerance)

Thermal imaging for micro-leaks

Ultrasonic detection for compressed air tests Acceptance criteria: <1% pressure loss in 30 minutes.

 

Safety Protocols

Mandatory precautions:

Pressure relief valves set at 110% test pressure

Exclusion zones during testing

Progressive pressurization alarms

Emergency depressurization procedures Personnel must maintain 3m clearance during air tests.

Documentation and Reporting

Required test records:

Pressure-time graphs (1-minute intervals)

Temperature compensation calculations

Leak location maps (if applicable)

Photographic evidence of critical joints Digital signatures from certified inspectors.

 

Special Case Considerations

Modified procedures for:

Large diameter pipes (>DN160): Extended stabilization

High-rise buildings: Zone testing approach

Industrial applications: Additional chemical resistance checks

Retrofit systems: Staged pressure testing

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