Stručni rad
Normative testing procedures and certifications firefighting centrifugal pumps with primer
Igor Župančić
; Javna vatrogasna postrojba grada Zagreba, Zagreb, Hrvatska
Sažetak
This text describe testing prcedure for Fire-fighting centrifugal pumps they are manufactured compliant to Europian Standards EN 1028-1 and En 1028-2. The testing procedures perform accreditation bodies are authorized for described testing procedures. This procedures described in this article applies for centrifugal pumps with primming device for fire-fighting use supplied separately without driver and couplings. The fire-fighting centrifugal pumps with primer are defined as terminated by their inlet and outlet connections as well as by their shafts ends. The testing procedures are referes to fire-fighting pumps are defined compliant to specified norms applies for fire-fighting pumps with priming devices for use under ambient temperature between – 15 °C and + 40 °C. The fire-fighting centrifugal pumps with priming devices according to mentions norm shall conform to the safety requirements and/or protective measure. Pressures are defined according to centrifugal pump testing procedures are inlet pressure (pu) , outlet pressure (pi), maximum pressure (pamax), limit pressure (pa lim), closing pressure (pa0), nominal delivery pressure (pN), static pressure test (pps) and dynamic test. Flow rates are expressed and described as delivery rate (Q) and nominal delivery rate (QN). There are the others technical characteristics as well as nominal speed impeller rotation (nN), priming speed impeller rotation (ns), maximum speed impeller rotation, efficiency (Ƞ), nominal efficiency (ȠN). If the fire-fighting centrifugal pump is compliant to EN 1028-1 and 1028-2 is defined and described according to it nominal hydraulic characteristics.They are nominal delvery rate (QN), nomianl delivery pressure (pN) and nominal speed impeller rotation (nN). This point in its data sheet has desacribed as the centrifugal pump nominal working point. In this point centrifugal pump has defined as geodetic nominal suction heigh at 3 m. Except at this suction heigh centrifugal pumps shall confirm to requirements have defined at suction height at 7,5 m. In terms of special requirements fire-fighting centrifugal pumpa shall conform to mechanical hazards, electrical hazards, thermal hazard, hazards from neglecting ergonomic design principles, and also hazards due to breakdown and/or incorrect installation of protection devices. In that sence limit pressures (pa lim), dynamic test pressures (paD) closing pressures (pa0) shall conforms to datas describe to Table 1. to Table 4. Static test pressure shall be 1,5 times the nominal delivery pressure for nominal pressure pumps (pps=1,5 x pn). The nominal delivery rates (QN), and nominal delivery pressures (pN) shal also conform to Table 1. to Table 4. After the accreditation body has finished testing procedures it has duty and obligation manufacturer supply testing report. Testing report shall be prepared containig at least:
1. the manufacturer's name and trademark,
2. a reference to this European Standard,
3. the pump designation according to EN 1028-1,
4. a fabrication number and year of manufacture,
5. a serial number of the pump body,
6. result of the test,
7. confirmation of whether the pump conforms to,
8. the date of the test
Ključne riječi
Normative testing procedures; firefighting pumps; primer device
Hrčak ID:
172406
URI
Datum izdavanja:
20.12.2016.
Posjeta: 2.076 *