I. Preparations and Inspections Before Installation
1. Specification and compatibility confirmation
Check the nominal diameter, working pressure, temperature range and medium compatibility of the hose (such as whether it is resistant to oil, acid, alkali or gas, etc.) to avoid hose aging or cracking due to medium corrosion (for example: nitrile rubber is oil-resistant, ethylene propylene diene monomer rubber is ozone-resistant and high-temperature resistant).
Confirm the usage scenarios (such as industrial pipelines, gas transmission, automotive fuel lines, etc.), and select hoses that comply with industry standards (for example, gas hoses need to conform to national standards such as GB 29993).
2. Appearance and quality inspection
Check whether there are cracks, bubbles, scratches, aging, hardening or softening on the surface of the hose, and whether the interface (such as the crimped joint) is firm, without delamination or rust on the metal parts.
Confirm the production date and shelf life of the hose, and avoid using products that have exceeded their aging cycle (rubber hoses are generally recommended to be used for 2 to 5 years, depending on the material).