Hose + Coupling World December 2021 Sample - Page 28

TECHNICAL ARTICLE
Under ISO 18752 , hoses are identified by pressure class , and each pressure class accommodates an entire range of hose diameters . This is in contrast to traditional SAE standards , which provide general , dimensional , and performance specifications for the most common hoses used in hydraulic systems based on hose construction .
In addition to requiring constant working pressure performance ratings in each pressure class for different hose sizes , the ISO 18752 standard introduces four different classes of service , A through D , which correlate with each class ’ s resistance to impulse pressure . In order to be rated to the ISO 18752 standard , hydraulic hoses undergo rigorous testing for durability and performance to ensure products possess the high quality necessary to meet the demands of tough applications .
hoses rated for a single pressure class in numerous sizes decreases inventory needs and simplifies the selection process . Hoses made to the ISO 18752 standard meet all the same requirements as SAE hoses , but require fewer types of hose to do so .
Having the ISO-rated hoses also helps OEMs remain relevant in the global marketplace . End users , particularly those with global operations , expect to have access to products regardless of their location and to be able to purchase readily available equipment designed and tested to the latest standards .
For each grade of hose , every ISO 18752 hose for a single pressure class must test to high impulses , extended cycles , and higher pressure and temperature criteria to be rated to the new global standard . Additionally , each grade is classified further by its outside diameter ( O . D .) as either standard ( AS , BS , CS ) or compact ( AC , BC , CC , DC ). Compact hose types have a smaller O . D . and tighter bend radius than the standard types .
Another benefit of hoses made to the ISO 18752 standard is establishing uniformity between locations . Written by the global standards organization , ISO engineers around the world can use this standard in place of their regional standard to designate hoses by size and pressure class for their application .
Dependability and high performance are uniform qualities of hoses rated to the ISO 18752 standard , since hoses conforming to this standard have had to undergo rigorous testing to meet the spec . In that way , having an ISO 18752 designation for their hydraulic hoses helps the end customer to feel confident about the quality of the product they receive .
In conclusion , anytime an OEM is securing quotes for a new platform , such as a new tractor , using the ISO 18752 standard to find and quote parts can be a time- and moneysaving way to move to the new standard .
Why to Make the Switch OEMs who decide to adopt and use ISO 18752 standards can expect to gain numerous benefits financially as well as reduce engineering complexity . Moving to the ISO 18752 standard allows OEMs and distributors to benefit in terms of inventory reduction because ISO 18752 hoses are classified by pressure class rather than construction . Stocking
ABOUT THE AUTHOR
Kyri McDonough has been a digital marketing professional for a variety of B2B and B2C companies for the last twenty-five years . She is currently the Global eBusiness Marketing Manager for Parker Hannifin , one of the world ' s leading diversified manufacturers of motion and control technologies and systems .
28 Hose + Coupling World , December 2021