SIST EN 14710-1:2005+A2:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Feuerlöschpumpen - Feuerlöschkreiselpumpen ohne Entlüftungseinrichtung - Teil 1: Klassifizierung, allgemeine Anforderungen und SicherheitsanforderungenPompes à usage incendie - Pompes centrifuges à usage incendie sans dispositif d'amorçage - Partie 1: Classification, prescriptions générales et de sécuritéFire-fighting pumps - Fire-fighting centrifugal pumps without primer - Part 1: Classification, general and safety requirements13.220.10Gašenje požaraFire-fightingICS:Ta slovenski standard je istoveten z:EN 14710-1:2005+A2:2008SIST EN 14710-1:2005+A2:2009en,fr,de01-maj-2009SIST EN 14710-1:2005+A2:2009SLOVENSKI
STANDARD



SIST EN 14710-1:2005+A2:2009



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14710-1:2005+A2
December 2008 ICS 13.220.10; 23.080 Supersedes EN 14710-1:2005+A1:2008 English Version
Fire-fighting pumps - Fire-fighting centrifugal pumps without primer - Part 1: Classification, general and safety requirements Pompes à usage incendie - Pompes centrifuges à usage incendie sans dispositif d'amorçage - Partie 1: Classification, prescriptions générales et de sécurité
Feuerlöschpumpen - Feuerlöschkreiselpumpen ohne Entlüftungseinrichtung - Teil 1: Klassifizierung, allgemeine Anforderungen und Sicherheitsanforderungen This European Standard was approved by CEN on 17 December 2004 and includes Amendment 1 approved by CEN on 6 June 2008 and Amendment 2 approved by CEN on 16 November 2008.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14710-1:2005+A2:2008: ESIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 2 Contents Page Foreword .30Introduction .41Scope .52Normative references .63Terms and definitions .74List of significant hazards . 135Safety requirements and/or protective measures . 156General and performance requirements . 187Verification of the safety requirements and/or protective measures . 198Verification of the general and performance requirements . 209Classification and brief designation . 2010Designation . 2211Information for use . 22Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC . 29Annex ZB (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC"""" . 30Bibliography . 31
Figures Figure 1 — Characteristic curve for the pressure in the outlet section pa (principle) . 11 Figure 2 — General warning sign ISO 7010-W001 . 23
Tables Table 1 — List of significant hazards . 14 Table 2 — Fire-fighting centrifugal pumps with nominal delivery pressures of 6 bar . 21 Table 3 — Fire-fighting centrifugal pumps with nominal delivery pressures of 10 bar . 21 Table 4 — Fire-fighting centrifugal pumps with nominal delivery pressures of 15 bar . 22
SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 3 Foreword This document (EN 14710-1:2005+A2:2008) has been prepared by Technical Committee CEN/TC 192 “Fire service equipment”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2009, and conflicting national standards shall be withdrawn at the latest by December 2009. This document supersedes #EN 14710-1:2005+A1:2008$ This document includes Amendment 1, approved by CEN on 2008-06-06 and Amendment 2, approved by CEN on 2008-11-16. The start and finish of text introduced or altered by amendment is indicated in the text by tags
!" and # $. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). !For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document." This document is intended to be used in conjunction with part 2 of EN 14710 “Verification of general and safety requirements”. EN 14710 "Fire-fighting pumps – Fire-fighting centrifugal pumps without primer" comprises two parts:  Part 1: Classification, general and safety requirements;  Part 2: Verification of general and safety requirements. For relationship with EN 1028 see EN 14710-2:2005, 4.1. This document includes a Bibliography. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 4 0 Introduction This document is a type C standard as stated in EN ISO 12100-1. The machinery concerned and the extent to which hazards, hazardous situations and events are covered are indicated in the scope of this document. Where provisions of this type C standard are different from those which are stated in type A or B standards, the provisions of this type C standard take precedence over the provisions of the other standards, for machines that have been designed and built in accordance with the provisions of this type C standard. While producing this document it was assumed that: a) only trained persons operate the machine; b) the original characteristics are maintained provided components are kept in good repair and working order. SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 5 1 Scope This document applies to centrifugal pumps without priming devices for fire-fighting use designed as
 floating pumps (FPN-F),  submersible pumps (FPN-S) or
 boosted pumps (FPN-B).
Fire-fighting centrifugal pumps without primer are defined as terminated by their inlet and outlet connections as well as by their shaft ends. This document applies for fire-fighting centrifugal pumps without priming devices for use under ambient temperatures between -15 °C and 40 °C. NOTE 1 For special conditions, -30 °C; see 6.11. This document does not apply to fire-fighting centrifugal pumps without primer of which the only power source is directly applied manual effort. This document does not apply to fire-fighting centrifugal pumps without primer, intended to be used as interchangeable equipment (i.e. combined by the user with another machine or vehicle acting as a driver). This document does not apply to fire-fighting centrifugal pumps without primer with a nominal delivery pressure pN above 15 bar. NOTE 2 High pressure pumps with primer are dealt with in EN 1028-1 and EN 1028-2. #This document specifies the classification and general requirements for fire-fighting centrifugal pumps without priming devices with a nominal delivery rate of up to 10 000 l/min.$ This document deals with significant hazards listed in Clause 4, hazardous situations and events during the commissioning, operation and maintenance of fire-fighting centrifugal pumps without priming devices, used as intended and under the conditions foreseen by the manufacturer. This document does not deal with the detailed verification of general and safety requirements and/or protective measures. These are covered in EN 14710-2 "Verification of general and safety requirements". This document does not deal with noise. This document does not deal with the technical safety requirements for the design or manufacture of drivers or of additional equipment intended to be fitted to inlet and outlet connections. It does not cover risks directly arising from means provided for the portability, transportability, and mobility of pump units during or between periods of operation, or requirements for power transmission devices. In addition, this document does not cover:  hazards occurring due to decommissioning;  hazards during use due to a specific environment (e.g. traffic during use on public roads, potentially explosive atmospheres). This document does not apply to fire-fighting centrifugal pumps without primer that are manufactured before the date of publication by CEN of this document. SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 6 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. #deleted text$ EN 349, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body EN 547-2, Safety of machinery — Human body measurements — Part 2: Principles for determining the dimensions required for access openings EN 547-3, Safety of machinery — Human body measurements — Part 3: Anthropometric data #deleted text$ EN 842, Safety of machinery — Visual danger signals — General requirements, design and testing EN 894-1, Safety of machinery — Ergonomics requirements for the design of displays and control actuators — Part 1: General principles for human interactions with displays and control actuators EN 894-2, Safety of machinery — Ergonomics requirements for the design of displays and control actuators —- Part 2: Displays EN 894-3, Safety of machinery — Ergonomics requirements for the design of displays and control actuators — Part 3: Control actuators EN 953, Safety of machinery — Guards — General requirements for the design and construction of fixed and movable guards #deleted text$ #deleted text$ EN 14710-2:2005, Fire-fighting pumps — Fire-fighting centrifugal pumps without primer — Part 2: Verification of general and safety requirements #EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General requirements (IEC 60204-1:2005, modified) $ EN 60529, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989) EN 61310-1, #Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual, acoustic and tactile signals (IEC 61310-1:2007)$ EN 61310-2, #Safety of machinery — Indication, marking and actuation — Part 2: Requirements for marking (IEC 61310-2:2007)$ EN 62079, Preparation of instructions — Structuring, content and presentation (IEC 62079:2001) EN ISO 5199, Technical specifications for centrifugal pumps — Class II (ISO 5199:2002) EN ISO 9905, Technical specifications for centrifugal pumps — Class I (ISO 9905:1994) EN ISO 9908, Technical specifications for centrifugal pumps — Class III (ISO 9908:1993) EN ISO 12100-1:2003, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic terminology, methodology (ISO 12100-1:2003) SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 7 EN ISO 12100-2, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical principles (ISO 12100-2:2003) #EN ISO 13732-1, Ergonomics of the thermal environment — Methods for the assessment of human responses to contact with surfaces — Part 1: Hot surfaces (ISO 13732-1:2006) $ #EN ISO 13857, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and lower limbs (ISO 13857:2008) $ #EN ISO 14121-1, Safety of machinery — Risk assessment — Part 1: Principles
(ISO 14121-1:2007) $. ISO 7010, Graphical symbols — Safety colours and safety signs — Safety signs used in workplaces and public areas 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 12100-1:2003 and the following apply. 3.1 Pumps and their applications 3.1.1 fire-fighting centrifugal pump FP mechanically or hydraulically driven fluid flow machine intended for delivery of fluids for fire-fighting purposes NOTE 1 Adapted from EN 1028-1. NOTE 2 Fire-fighting centrifugal pumps without primer are specially designed for use by fire brigades and can be suitable for installation in fire-fighting vehicles as specified in EN 1846-1 and motor pumps. NOTE 3 Fire-fighting centrifugal pumps without primer generally consist of:  pump unit;  connections for inlet ports;  shut off devices and connections for outlet ports;  connections between pump, shut off devices and connection couplings;  sieves and dirt traps;  measuring instruments;  safety devices (if provided);  additional equipment. 3.1.2 vehicle mounted pump pump permanently installed on a vehicle and driven by the motive power of the vehicle [EN 1028-1:2002] SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 8 3.1.3 motor pump pump complete with a drive motor [EN 1028-1:2002] 3.1.3.1 portable pump hand transportable motor pump not permanently mounted on a fire-fighting vehicle #NOTE Portable pumps are standardized in EN 14466.$ [EN 1028-1:2002] 3.1.3.2 trailer pump motor pump mounted on a wheeled chassis that can be towed by a vehicle [EN 1028-1:2002] 3.1.3.3 skid-mounted pump motor pump mounted on a fixed or transportable frame [EN 1028-1:2002] 3.1.4 normal-pressure pump FPN single or multiple stage fire-fighting centrifugal pump for nominal delivery pressures pN up to 15 bar NOTE Adapted from EN 1028-1. 3.1.4.1 floating pump FPN-F pump floating on the surface of the water with the inlet section and the first impeller fully submerged under water 3.1.4.2 submersible pump FPN-S pump with the inlet section and the first impeller totally submerged under water, and which shall also be operational when fully submerged beneath the water 3.1.4.3 boosted pump FPN-B pump to which water is fed under pressure (e.g. from another pump or from an elevated tank) 3.1.5 direction of rotation direction of rotation of the impeller viewed from the driving site NOTE 1 Adapted from EN 1028-1. NOTE 2 The direction of rotation is given by the following convention:  to the right: clockwise;  to the left: anticlockwise SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 9 3.2 Inlet heights NOTE 1 For fire fighting centrifugal pumps without primer the suction height is called the inlet height. NOTE 2 All inlet heights are given in metres. 3.2.1 geodetic inlet height
HZ geo height difference between the centre of the first impeller inlet and the water level on the inlet side at 1013 mbar and 4 °C water temperature NOTE In case of deviating local air pressure (pb) and deviating water temperatures a correction of the geodetic inlet height is not necessary, due to the constructive characteristics of the pump. Under conditions deviating from 1013 mbar and 4 °C, this may lead to different performance results. 3.2.2 geodetic nominal inlet height
HZ geo N height difference between the centre of the first impeller inlet (in the direction of flow) and the water level on the inlet side of the pump, at 1013 mbar and 4 °C water temperature, as specified for the nominal delivery rate NOTE In case of deviating local air pressure (pb) and deviating water temperatures a correction of the geodetic nominal inlet height is not necessary, due to the constructive characteristics of the pump. Under conditions deviating from 1013 mbar and 4 °C, this may lead to different performance results. 3.3 Pressures NOTE Pressures are manometric pressures given in bar. 3.3.1 inlet section pressure pe inlet pressure, measured at the measurement point specified in Annex B of EN 14710-2:2005 NOTE 1 Adapted from EN 1028-1. NOTE 2 The pressure can be positive or negative. 3.3.2 outlet section pressure pa outlet pressure, measured at the measurement point specified in Annex B of EN 14710-2:2005 NOTE Adapted from EN 1028-1. 3.3.3 maximum pressure pa max maximum pressure that can be attained in the outlet section at geodetic nominal inlet height HZ geoN and maximum speed n0 (see Figure 1) NOTE Adapted from EN 1028-1. 3.3.4 limit pressure pa lim maximum permissible outlet section pressure pa during operation (see Figure 1)
[EN 1028-1:2002] SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 10 3.3.5 closing pressure pa0 steady state pressure in the outlet section with a delivery flow rate Q = 0, at geodetic nominal inlet height HZ geoN and maximum speed n0 (see Figure 1)
NOTE Adapted from EN 1028-1. 3.3.6 delivery pressure p difference between the outlet section pressure pa and the inlet section pressure pe;
p = pa - pe [EN 1028-1:2002] 3.3.7 nominal delivery pressure pN delivery pressure specified for the nominal delivery rate [EN 1028-1:2002] 3.3.8 static test pressure pps pressure used for testing the integrity of the inlet side of the pump when stationary [EN 1028-1:2002] 3.3.9 dynamic test pressure ppd pressure used for testing the integrity of the pressure parts of the pump with the pump running, given by pa lim + 5,5 bar (see Figure 1) [EN 1028-1:2002] SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 11
Key pa
Outlet section pressure pa0
Closing pressure pa max
Maximum pressure pa lim
Limit pressure ppd
Dynamic test pressure Q
Delivery rate Figure 1 — Characteristic curve for the pressure in the outlet section pa (principle) 3.4 Delivery rates NOTE Delivery rates are given in litres per minute. 3.4.1 delivery rate Q volume delivered by the pump per unit of time [EN 1028-1:2002] 3.4.2 nominal delivery rate QN delivery rate specified at nominal delivery pressure
pN, nominal speed
nN and geodetic nominal inlet height HZ geoN NOTE Adapted from EN 1028-1. 3.5 Power NOTE Power values are given in kilowatts. 3.5.1 delivery power PQ power transmitted by the pump at delivery rate Q [EN 1028-1:2002] SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 12 3.5.2 nominal delivery power PQN delivery power at nominal speed, nominal delivery rate, nominal delivery pressure and geodetic nominal inlet height HZ geoN NOTE Adapted from EN 1028-1. 3.5.3 driving power PM power required on the drive flange to provide the delivery power [EN 1028-1:2002] 3.5.4 nominal driving power PMN driving power required for nominal delivery power [EN 1028-1:2002] 3.6 Speed of rotation NOTE Speeds of rotation are measured in revolutions per minute. 3.6.1 nominal speed nN speed of the first impeller at nominal delivery power [EN 1028-1:2002] 3.6.2 maximum speed n0 maximum speed of the first impeller as indicated by the manufacturer [EN 1028-1:2002] 3.7 Efficiencies NOTE Efficiency is expressed as a percentage. 3.7.1 efficiency
quotient of the delivery power and the driving power [EN 1028-1:2002] 3.7.2 nominal efficiency N efficiency at nominal delivery power [EN 1028-1:2002] SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 13 4 List of significant hazards This clause contains all the significant hazards, hazardous situations and events covered in this document, identified by risk assessment significant to this type of machinery and that require action to eliminate or reduce risks. The significant hazards are given in Table 1, which is based on #EN ISO 14121-1$. Also shown are the subclause references to the safety requirements and/or protective measures in this document. #deleted text$ Before using this document it is important to carry out a risk assessment of the machine to check if it has the hazards identified in this clause.
SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 14 Table 1 — List of significant hazards #N°$ Significant hazards EN 14710-1: 2005 Reference to relevant clause Hazards, hazardous situations and hazardous events 1 Mechanical hazards 1.1 Crushing
5.2.1.1 1.2 Shearing 5.2.1.1 1.3 Cutting
5.2.1.1 1.4 Entanglement
5.2.1.1 1.9 High pressure fluid injection or ejection hazard 5.2.1.2 11.3.2.4 2 Electric hazards 2.1 Contact of persons with live parts (direct contact) 5.2.2 11.3.2.4 11.3.2.5 3 Thermal hazards 3.1 Burns, scalds and other injuries by a possible contact of persons with objects or materials with an extreme high or low temperature, by flames or explosions and also by the radiation of heat sources 5.2.1.2.6 5.2.3 4 Hazards generated by noise 4.2 Interference with speech communication, acoustic signals, etc. 11.2 8 Hazards generated by neglecting ergonomic design
principles 8.2 Inadequate consideration of hand-arm or foot-leg anatomy, etc. 5.2.1.1.2 5.2.4 8.7 Inadequate design, location or identification of manual controls 5.2.1.1.2 5.2.4 11.3.2.4 8.8 Inadequate design or location of visual display units 5.2.4 11.2 11.3.2.4 – Hazards caused by missing and/or breakdown and/or
wrong installation of protection devices 15 All types of guards 5.2.5.1 11.3.2.5 8.8 Measuring instruments and measuring instrument connections 5.2.5.2 11.3.2.4 11.3.2.5 7.3.6 Safety devices (by-pass, control valve, pressure relief valve) 5.2.5.3 11.3.2.4 11.3.2.5 11.3.2.6
SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 15 5 Safety requirements and/or protective measures 5.1 General 5.1.1 Fire-fighting centrifugal pumps without priming devices shall comply with the safety requirements and/or protective measures of this clause. In addition, the pump shall be designed according to the principles of EN ISO 12100-1 and EN ISO 12100-2 for hazards relevant but not significant, which are not dealt with by this document. 5.1.2 Before using this document it is important to carry out a risk assessment of the machine to check that it has the hazards identified in this clause. 5.1.3 For hazards which are to be reduced by the application of type B-standards referred to in this document (#EN ISO 13857$, EN 349, EN 547-2, EN 547-3, EN 842, EN 894-1, EN 894-2, EN 894-3, EN 953, EN 60204-1, EN 61310-1, EN 61310-2), the manufacturer shall carry out a risk assessment to establish the requirements of these type B-standards which are to be applied. This specific risk assessment shall be part of the general risk assessment of the machine. 5.2 Special requirements 5.2.1 Mechanical hazards 5.2.1.1 Crushing, shearing, cutting and entanglement 5.2.1.1.1 General Means shall be incorporated to reduce the hazards created by exposed moving parts, including as appropriate:  barriers conforming to #EN ISO 13857$ to prevent contact with moving parts;  gaps at the end-of-travel conforming to EN 349;  guards conforming to EN 953. Rotating shafts, in particular those with exposed keys and keyways or other projections that could cut or catch shall be protected or guarded.
Fixed guards for reducing risks from contact with parts of a pump, except for the pump inlet screen (see 11.3.2.6), shall be removable only by using a tool. It shall not be necessary to remove the guard in order for the pump to function normally.
Covers giving access for adjustment or setting of controls or sensors whilst the pump is in operation shall be secured against unintended opening both when open and closed, and as far as possible remain attached to the pump when open but shall not be required to be interlocked. Machined or cut parts exposed, or likely to be exposed, at any stage during installation, operation, or servicing of the pump shall be treated to remove burrs, rags and sharp edges by radiusing or chamfering. 5.2.1.1.2 Operating controls Operating controls shall be clearly identified (see 11.4.1) and easy to operate as specified in EN 894 (all parts).
Manual controls and other operating devices shall be easy to reach and operable without unreasonable effort.
Operating controls shall be designed to ensure that crushing hazards are avoided, in accordance with EN 349, as well as shearing or cutting hazards (e.g. by providing adequate clearance). SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 16 5.2.1.1.3 Drain openings Drain openings shall conform to the safety distance requirements in #EN ISO 13857$. 5.2.1.2 High pressure fluid ejection 5.2.1.2.1 Sealing system Pumps shall be equipped with a sealing system compatible with the pumped fluid.
Compatibility shall be assessed by considering the nature of the liquid, the pressure, and temperature.
5.2.1.2.2 Pressure containing elements Pressure containing parts and components of a pump shall be suitable for the limit pressure pa lim (see 5.2.1.2.3). Any movement resulting from loss of pressure shall not create a hazard. 5.2.1.2.3 Limit pressure The limit pressure
pa lim shall conform to Tables 2 to 4. 5.2.1.2.4 Static test pressure The static test pressure for boosted pumps pps shall be 1,5 times the nominal delivery pressure, i.e.:
pps = 1,5 × pN For floating pumps and submersible pumps pps = pN. 5.2.1.2.5 Dynamic test pressure The dynamic test pressure ppd shall conform to Tables 2 to 4. 5.2.1.2.6 Safety equipment It shall be possible to fit safety equipment to ensure that:  n0 cannot be exceeded;  the temperature of the water cannot exceed 60 °C in any mode of operation;  the limit pressure pa lim can be monitored or cannot be exceeded;  #boosted pumps don’t create hazards for the operator caused by excessive input pressure respectively suddenly increasing input pressure or fluctuations of the input pressure.$ 5.2.1.2.7 Forces and moments on pipe connections For rotodynamic pumps forces and moments on pipe connections shall conform to EN ISO 5199, EN ISO 9905, EN ISO 9908. 5.2.2 Electrical hazards
Only extra low voltage as specified in #EN 60204-1:2006$, 6.4.1 shall be used. The protection against direct contact shall be min. IP 2X as specified in EN 60529. SIST EN 14710-1:2005+A2:2009



EN 14710-1:2005+A2:2008 (E) 17 5.2.3 Thermal hazards For maximum surface temperatures during operation and transport #EN ISO 13732-1$ #deleted text$ apply with following limits: a) For unintentionally contactable surfaces, a contact duration of 0,5 s shall be applied. b) For intentionally contactable surfaces, e.g. controls, a contact duration of 4 s shall be applied. 5.2.4 Hazards from neglecting ergonomic design principles
Pumps incorporating signal displays and/or control actuators shall conform to the design principles specified in EN 894 (all parts).
Signals shall be unambiguous.
Access openings on pumps shall be designed in accordance with EN 547-2 and EN 547-3 so that maintenance can be carried out (see also 11.3.2.6). NOTE For maintainability requirements see also EN ISO 12100-2. 5.2.5 Hazards due to breakdown and/or incorrect installation of protection devices 5.2.5.1 Guards Removable guards shall be designed so that incorrect mounting is not possible. 5.2.5.2 Measuring instruments and measuring instrument connections Boosted pumps shall have connection points for pressure measuring instruments on the inlet side and the outlet side.
If provided, pressure measuring instruments shall have an accuracy of ± 2,5 % of full scale value with the following measuring ranges:  inlet side measuring range: - 1 bar to at least 1,5 times nominal delivery pressu
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