Standard: (NFPA) - NFPA T3.20.8

QUICK-ACTION COUPLING – PRESSURE RATING SUPPLEMENT TO NFPA/T2.6.1 R2-2000, FLUID POWER COMPONENTS – METHOD FOR VERIFYING THE FATIGUE AND ESTABLISHING THE BURST PRESSURE RATING OF THE PRESSURE CONTAINING ENVELOPE OF A METAL FLUID POWER QUICKACTION COUPLING

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Scope:

This standard provides: − test and statistical methods for generating fatigue-distribution data;

− test and statistical methods for verifying the pressure ratings of quick-action couplings;

− common requirements and an industry-wide philosophy for judging one type of pressure capability for quick-action couplings;

− uniform methods of product comparison. 

This standard limits conditions as follows:

− pressure-induced loadings of constant amplitude;

− product life of at least 100,000 cycles;

− pressure levels and pulse durations as defined in NFPA/T2.6.1 R2, clause 8;

− temperatures that range from the Charpy impact transition temperature to the threshold of creep sensitivity;

− environments which are chemically compatible with the materials in the pressure-containing envelope;

− materials that are aluminum, magnesium, iron, steel, stainless steel, cobalt, titanium, copper-based alloys, nickelbased alloys, or monel. Specifically excluded are creep-sensitive materials such as zinc, plastic, rubber and sealing devices;

− quick-action couplings which are connected and disconnected by a linear or rotational motion, or both;

− quick-action couplings with or without sealing means when uncoupled.

This standard encourages manufacturers to use this common method to enhance the credibility of their pressure ratings.

Organization: National Fluid Power Association
Document Number: nfpa t3.20.8
Publish Date: 2000-03-15
Page Count: 9
Change Type: REAF
Available Languages: EN
DOD Adopted: NO
ANSI Approved: NO
Most Recent Revision: YES
Current Version: YES
Status: Active

Document History

Document # Change Type Update Date Revision Status
NFPA T3.20.8 Change Type: REAF Update Date: 2000-03-15 Revision: R2 Status: INAC
NFPA T3.20.8 Change Type: REAF Update Date: 2000-03-15 Revision: R2 Status: INAC
NFPA T3.20.8 Change Type: Update Date: 2000-03-15 Revision: R2 Status: INAC

This Standard References

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