NFPA T3.10.5.1

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1 Scope1.1 This standard provides:− test and statistical methods for generating fatigue distribution data;− test and statistical methods for conducting a verification of the pressure ratings on fluid power hydraulic filter/separator housing(s);− common requirements and an industry-wide philosophy in judging one type of pressure capability for fluid powerhydraulic filter/separator housing(s);− uniform methods of product comparison.1.2 This standard limits conditions as follows:− constant amplitude, pressure induced loading of the elements that constitute or maintain the pressure containingenvelope;− product life of at least 100,000 cycles;− defined conditions for pressure levels and pulse durations;− temperatures from the charpy impact transition temperature to the threshold of creep sensitivity;− environments which are chemically compatible with the materials of the pressure containing envelope;

− materials that are aluminum, magnesium, steel, iron, copper based alloys, cobalt, titanium, stainless steels, nickelsteels and monel;− specifically excluded are creep sensitive materials such as: zinc, plastic, rubber and sealing devices;− to exclude the finite life RFP rating for a hydraulic filter /separator housing (such as spin-on filters) used in finite lifeapplications. See NFPA/T3.10.17.1.3 This standard encourages manufacturers to use this common method to enhance the credibility of their pressureratings.1

2 Normative referencesThe following standards contain provisions, which through reference in this text, constitute provisions of this standard.At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties toagreements based on this standard are encouraged to investigate the possibility of applying the most recent editions ofthe standards indicated below. NFPA maintains registers of currently valid NFPA standards.NFPA/T2.12.10, Hydraulic fluid power – Systems and products – Testing general measurement principles andtolerances.NFPA/T3.10.17, Finite life hydraulic filter pressure/life rating – Method for verifying the fatigue life rating andthe burst pressure rating of the pressure containing envelope of a spin-on hydraulic filter.ASTM E466, Standard Practice for Conducting Force Controlled Constant Amplitude Axial Fatigue Tests ofMetallic Materials.ISO 1000:, SI units and recommendations for the use of their multiples and of certain other units.ISO 5598:, Fluid power systems and components – Vocabulary.NFPA/T2.6.1, Fluid power components – Method for verifying the fatigue and establishing the burst pressure ratingsof the pressure containing envelope of a metal fluid power component.