Storage and duration of use

Even with proper storage and permissible stress, hose assemblies are subject to natural aging. As a result, their storage time and period of use are limited. Improper storage, mechanical damage and inadmissible stresses are the most common causes of failure. Hose assemblies shall be stored in a manner that facilitates age control and first-in and first-out usage based on manufacturing date.

The following conditions shall be observed when storing hose assemblies:

  • Store dry, dust- and kink-free.
  • The optimum storage temperature is between 15 °C and 25 °C. Temperatures above 50°C or below -30°C, as well as strong temperature fluctuations, shall be avoided.
  • When stored near freezing point, the hoses and hose assemblies shall be completely drained (danger of frost and ice formation)
  • Store hose assemblies stress-free and lying down.
  • The minimum bending radius shall not be undercut.
  • The use of protective caps is recommended. (To protect the fitting and prevent ingress of foreign objects entering the hose).

The below points are valid for all hose-types but are especially critical for rubber hoses:

  • Protection from direct solar radiation.
  • No ozone-forming lamps or electrical equipment should be used in the immediate vicinity.
  • Contact with harmful materials should be avoided. E.g. solvents, oils, greases, acids, etc.
  • The hose assemblies should not be stored in the immediate vicinity of heat sources.

The maximum storage period of bulk hoses is 10 years for thermoplastic hoses and 4 years for rubber hoses, that of ready assembled hose assemblies 2 years. If possible, the storage of the hose assemblies should be avoided. The period of use of a hose assembly, including any storage period of the hose assembly, should not exceed six years.

Depending on empirical values, the duration of use may deviate from the guide values. Due to many diverse applications, the service life cannot be determined exactly. E.g. a high-pressure supply hose and a lance hose are not comparable. Tests during the life of the hose assemblies must be made for additional safety.

 

Links

Table of contents of hose assemblies in water jetting

 

Help us to improve

If you have a suggestion about this content, detect any typo or simply want to send us comments or proposals, you can use the following form to contact EWJI.

To contact EWJI, please fill in and submit the following form.

By submitting the form, you will automatically receive an e-mail with a copy of your request

Compartir por