Industry science: what is the pressure loading test, what is the difference between pneumatic and hydraulic test?

Comparison table of air tightness test and pressurization test
Comparison table of air tightness test and pressurization test

Pressure loading test is a commonly used test method to check the strength, durability and sealing of materials or products. Pressure loading test is mainly used in aerospace, automobile manufacturing, new energy, chemical industry, oil and gas, machinery manufacturing, medical equipment and other industries. In these industries, pressure loading test machines are widely used to test the pressure performance of various materials, products or systems, such as aerospace materials, automotive parts, new energy batteries, oil and gas pipelines, chemical equipment, shipbuilding materials, electric power equipment, machinery parts, medical devices and so on.

Ⅰ.Test Principle

The principle of pressure loading test is to test the strength, stiffness, elasticity, ductility, fatigue strength, fracture toughness and other properties of a product by applying pressure on the material or product.

Industry science: what is the pressure loading test, what is the difference between pneumatic and hydraulic test?  Illustration 1
Schematic diagram of pressure loading test

The purpose of the pressure loading test is to ensure that the material or product meets the requirements for its use, to detect product defects in a timely manner, to assess safety in order to improve product performance and to avoid accidents.

Ⅱ.Test Methods

There are many different methods of pressure loading tests, common ones include:

  • Static pressure test
  • Dynamic pressure test
  • Sealing test
  • burst pressure test
  • Cyclic pressure test
  • Overturning pressure test
  • Shock pressure test
  • Fatigue pressure test

III.Pressure loading test equipment

Gas pressure loading test machines (referred to as gas pressure test machines) and water pressure test machines (referred to as hydraulic test machines) are both devices used to perform pressure loading tests. Pneumatic pressure testers use gas as the loading medium, while hydraulic pressure testers use water as the loading medium.

行业科普:什么是压力加载试验,气压和水压试验有什么区别?插图2
Pneumatic pressure loading test machine: the advantage is fast, high precision, but the disadvantage is more expensive
行业科普:什么是压力加载试验,气压和水压试验有什么区别?插图3
Hydrostatic testing machine: the advantage is cheap, but the disadvantage is slow speed, precision is not high.

The following factors need to be considered when choosing between a pneumatic tester or a hydraulic tester:

Different pressure media

Pneumatic testers use gases such as air, nitrogen, etc. as the pressure medium, while hydraulic testers use liquids, i.e. water, as the pressure medium.

Different pressure ranges

The pressure range of pneumatic testing machine is generally 0~5MPa, while the pressure range of hydraulic testing machine is larger and can reach 0~300MPa.

Different pressure loading methods

The pneumatic testing machine loads pressure through the pneumatic chamber, and the pressure field is relatively uniform. Hydrostatic testing machine forms pressure loading through head height difference, the pressure field is not uniform.

Different sizes and costs

For the same pressure, pneumatic testers are smaller and more costly; hydraulic testers are larger and less costly.

Different test application ranges

Pneumatic testing machines are used to test mechanical properties; hydraulic testing machines are commonly used for sealing performance testing.

Differences in safety

Pneumatic testing is relatively safer, while hydraulic testing involves the risk of water pressure explosion.

JCGK cell pressure loading tester for new energy batteries is designed to perform flip pressure/burst test/breathing cycle/pressure loading/airtightness test to ensure the quality and safety of its products.

IV. Summary

Pressure loading tests are an important quality control tool to ensure that a material, product or system will work safely at the designed pressure and avoid failures or accidents by testing with pneumatic testers and hydraulic testers.

If the requirements for testing speed and accuracy are high, then the pneumatic testing machine should be chosen. If the requirement for testing cost is high, then the hydraulic testing machine should be chosen.

If you have any problems performing a pressure loading test, consult a pressure tester manufacturer or a professional, such as Precision Engineering Airtightness.

Latest Articles

Recommended Products

  • All Products
  • Positive pressure air tightness tester
  • Air tightness testing equipment
  • Burst Tester
  • New Energy Test Equipment
  • Negative Pressure Waterproof Tester
  • Water Purifier Function Test Equipment
  • Respiratory Cycle Tester
  • Quantitative air tightness testing equipment
  • Breath Burst Tester
  • Gas Flow Detector
  • Breathing Blaster
  • Differential Pressure Airtightness Tester
  • Non-standard automation equipment
  • Safety valve function tester
  • Positive and Negative Mixed Pressure Gas Tightness Tester
  • Shell pressure resistance test equipment
  • Multi-Channel Seal Tester
  • Cell pressure loading tester
  • Waterproof Breathable Membrane Comprehensive Tester

Four-channel airtightness testing equipment

Duplex Airtightness Test Equipment

Single-station airtightness testing machine

Differential Pressure Quantitative Gauge 4

Differential Pressure Quantitative Airtightness Tester

Contact

Bottom QR Code_Public
Scan the code to follow the WeChat public number
滚动至顶部

介绍下你们的仪器

你们是源头厂家吗?

可以替代国外进口品牌吗?

请您留言

深圳市精诚工科科技有限公司 24H热线:13144878223(微信同号)

提交