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VALVES FOR WATER SUPPLY - FITNESS FOR PURPOSE REQUIREMENTS AND APPROPRIATE VERIFICATION TESTS - PART 6: HYDRANTS
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Published date: 12-01-2013
Publisher: Norwegian Standards (Norges Standardiseringsforbund)
ForewordIntroduction1 Scope2 Normative references3 Terms and definitions4 Design requirements5 Performance requirements 5.1 Mechanical strength 5.1.1 Resistance to internal pressure of the shell and of all pressure containing components 5.1.2 Resistance of the obturator to differential pressure 5.1.3 Resistance of hydrants to bending and to any force applied above the ground level 5.1.4 Resistance of hydrants to operating loads 5.2 Leak-tightness 5.2.1 Leak-tightness of the shell and of all pressure containing components 5.2.2 Seat tightness 5.2.3 Maximum operating torque (MOT) for operation and seat-tightness 5.2.4 Leak-tightness of gearboxes to external pressure 5.3 Hydraulic characteristic 5.4 Resistance to disinfection products 5.5 Endurance 5.5.1 Endurance of the hydrant 5.5.2 Endurance of the non-return device 5.6 Performance of the draining system6 Conformity assessment 6.1 General 6.2 Type tests 6.3 Control of production process and quality system7 Marking8 PackagingAnnex A (normative) Test method for the resistance of hydrants to bending A.1 General A.2 Test procedureAnnex B (normative) Test method for the resistance of pillar hydrants to a force applied above ground level B.1 General B.2 Test procedure for pillar hydrants not equipped with a breaking system B.3 Test procedure for pillar hydrants equipped with a breaking systemAnnex C (normative) Test method for the operation of hydrants C.1 General C.2 Test procedureAnnex D (normative) Test method for the endurance of hydrants D.1 General D.2 Test procedureAnnex E (normative) Test method for the performance of draining system E.1 General E.2 Test procedureBibliography
Specifies the minimum fitness for purpose requirements for hydrants to be used in, or connected to, water supply pipe systems, above or below ground, carrying water intended for human consumption.
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