STAMPED is an acronym corresponding to the 7 major areas of information required to provide a correct hose assembly:

Note: Each area of information may require further clarification or additional details
The information provided below is a condensed  version of the Hose Safety Handbook published by NAHAD

stands for SIZE; I.D, length and any O.D constraints

  • overall length should be specified to include fittings
  • tolerances need to be specified if special requirements exist

Note: Under-sizing hose assemblies results in higher flow rates of the medium. The ensuing turbulence causes loss of pressure, noise and increased temperatures. This can be detrimental to the entire system.

stands for TEMPERATURE of the material conveyed and environmental conditions

  • Temperature affects service life
  • Temperature resistance depends on medium
  • Continuous (average) and minimum / maximum temperatures have to be specified
  • Note if flame resistance or flammability will be an issue
  • Protect assemblies with heat shields near hot surfaces
  • Specify potential fluctuation in temperatures
  • Do not use hose assemblies for any medium over specified temperature range
  • Maximum assembly working pressures will decrease as temperatures increase

Note: Continuous operation at high temperatures can affect the service life of the hose and reliable seating of the fittings. Hose assemblies will have a longer service life if not continually used at the limits of their working pressure, bend radius and temperature range.

stands for APPLICATION, outlines service conditions

  • Configuration, routing or installation (add sketch if applicable)
  • Quantify anticipated movement
  • Intermittent or continuous service
  • Indoor or outdoor use (chemicals in environment)
  • Excessive abrasion
  • Electrical conductivity requirements
  • Flexing: Intermittent, continuous or static

stands for the MATERIAL or MEDIA being conveyed, type and concentration

  • Chemical name and concentration (MSDS information)
  • Any special specifications or agency requirements (e.g. USCG, FDA)
  • Exposure time: Is media flowing or sitting in the hose for long periods
  • Will the hose be submerged or exposed to chemicals externally

stands for PRESSURE to which the assembly is exposed (positive and negative)

  • Assembly working pressure must be equal to or greater than system pressure
  • Pressure spikes greater than hose maximum working pressure will shorten hose life
  • Temperature and vacuum implications
  • Do not use beyond manufacturer’s stated working pressure

stands for ENDS; style, type, orientation and attachment methods

  • Uncoupled or coupled hose; hose with built-in fittings
  • Specify end type
  • Materials and dimensions (carbon steel, brass, stainless steel)
  • Conductivity requirements

stands for Delivery

  • Specify customer requirements
  • Testing / tagging requirements (certification: USCG, CRN, CGA)
  • Packing and shipment requirements

Custom Assemblies:

There are specific applications that require additional design, fabrication, installation and maintenance considerations over and above the requirements set forth here. Contact your supplier to discuss your specific requirements.