Sealing and pressure resistance test

Test Background

The connection devices (Manifold, bellows, pipeline components) are one of the parts with the highest pressure and the greatest leakage risk in the liquid cooling system. The sealing and pressure resistance performance directly determines the safe operation of the system.

Test Introduction

The sealing and pressure resistance test includes hydrostatic pressure resistance test, pressure cycle test and helium mass spectrometry leakage test to verify the sealing integrity and structural strength of the connection device under rated pressure and over-pressure conditions.

Testing Objectives

Verify if there is any leakage and deformation under 1.5 times the working pressure

Determine the burst pressure limit to ensure a safety margin of ≥3 times

Detect micron-level leakage defects

Evaluate the fatigue life under pressure fluctuations

Test Standards

T/CESA 1249.2-2023 Technical specification for connection systems

GB/T 7939.2-2024 Test methods for quick-change connectors

ISO 19879 Test methods for hydraulic pipe connectors

Applicable Products/Fields

Suitable for water dividers, bellows, LCM, RCM, stainless-steel pipes, etc. in liquid-cooling systems.

Test Content

Hydrostatic pressure test: Maintain the pressure at 1.5 times the working pressure for 30 minutes

Burst pressure test: Increase the pressure at a uniform speed until rupture and record the burst value

Pressure cycle test: Cycle 10,000 times from 0.2 to 1.0 MPa

Helium mass spectrometry leak detection: Double leak detection in connected and disconnected states

Project Advantages

High-precision helium leak detection equipment, capable of detecting leaks at the 10⁻⁶ Pa·m³/s level

Pressure cycle testing can simulate start-stop life of more than 10 years

Provides burst pressure curves and failure mode analysis

Laboratory Configuration

Hydrostatic test bench (0-10 MPa)

Burst test system (automatically records the pressure curve)

Pressure pulse test bench

Helium mass spectrometry leak detector

FAQ
Q: Why is the burst pressure required to be ≥ 3 times the working pressure? A: Ensure that the pipeline will not burst during abnormal overpressure (such as accidental valve closure, water hammer effect), and gain time for safe pressure relief.