SIST EN ISO 7396-1:2007
Medical gas pipeline systems - Part 1: Pipeline systems for compressed medical gases and vacuum (ISO 7396-1:2007)
Medical gas pipeline systems - Part 1: Pipeline systems for compressed medical gases and vacuum (ISO 7396-1:2007)
This part of ISO 7396 specifies requirements for design, installation, function, performance, documentation, testing and commissioning of pipeline systems for compressed medical gases, gases for driving surgical tools and vacuum in healthcare facilities to ensure continuous delivery of the correct gas and the provision of vacuum from the pipeline system. It includes requirements for supply systems, pipeline distribution systems, control systems, monitoring and alarm systems and non-interchangeability between components of different gas systems. This part of ISO 7396 is applicable to: a) pipeline systems for the following medical gases: - oxygen; - nitrous oxide; - medical air; - carbon dioxide; - oxygen/nitrous oxide mixtures (see Note 1); b) pipeline systems for the following gases: - oxygen-enriched air; - air for driving surgical tools; - nitrogen for driving surgical tools; c) pipeline systems for vacuum. This part of ISO 7396 also applies to: - extensions of existing pipeline distribution systems; - modifications of existing pipeline distribution systems; - modifications or replacement of supply systems or sources of supply.
Rohrleitungssysteme für medizinische Gase - Teil 1: Rohrleitungenssyteme für medizinische Druckgase und Vakuum (ISO 7396-1:2007)
Dieser Teil von ISO 7396 legt Anforderungen an Gestaltung, Installation, Funktion, Leistung, Dokumentation, Prüfung und Inbetriebnahme von Rohrleitungssystemen für medizinische Druckgase, Gase zum Betreiben chirurgischer Werkzeuge und Vakuum in Gesundheitseinrichtungen fest, um die Beständigkeit der Lieferung des korrekten Gases und die Bereitstellung eines Vakuums durch das Rohrleitungssystem sicherzustellen. Einbezogen sind Anforderungen an Versorgungssysteme, Rohrverteilersysteme, Regel , Überwachungs und Alarmsysteme und die Nichtaustauschbarkeit zwischen Bauteilen unterschiedlicher Gassysteme.
Dieser Teil von ISO 7396 gilt für:
a) Rohrleitungssysteme für folgende medizinische Gase:
- Sauerstoff;
- Distickstoffoxid (Lachgas);
- medizinische Luft;
- Kohlendioxid;
- Gemische von Sauerstoff und Distickstoffoxid (siehe Anmerkung 1);
b) Rohrleitungssysteme für folgende Gase:
- (*) mit Sauerstoff angereicherte Luft;
- Luft zum Betreiben chirurgischer Werkzeuge;
- Stickstoff zum Betreiben chirurgischer Werkzeuge;
c) Rohrleitungssysteme für Vakuum.
Dieser Teil von ISO 7396 gilt auch für:
- Erweiterungen bestehender Rohrverteilersysteme;
- Veränderungen bestehender Rohrverteilersysteme;
- Veränderungen oder Ersatz von Versorgungssystemen oder Versorgungsquellen.
ANMERKUNG 1 Regionale oder nationale Bestimmungen können die Verteilung von Gemischen von Sauerstoff und Distickstoffoxid in Rohrleitungssystemen für medizinische Gase untersagen.
Réseaux de distribution de gaz médicaux - Partie 1: Réseaux de distribution de gaz médicaux comprimés et de vide (ISO 7396-1:2007)
L'ISO 7396:2006 spécifie les exigences relatives à la conception, à l'installation, au fonctionnement, aux performances, à la documentation, à l'essai et à la réception des systèmes de distribution de gaz médicaux comprimés, de gaz moteurs pour les instruments chirurgicaux et de vide médical dans les établissements de soins afin que le système de distribution assure une fourniture continue du gaz prévu et du vide médical. Elle comporte des exigences relatives aux systèmes d'alimentation, de distribution, de contrôle, de surveillance et d'alarme, ainsi qu'à l'absence d'interchangeabilité entre les composants de plusieurs systèmes de distribution de gaz.
L'ISO 7396:2006 s'applique également aux systèmes de distribution des gaz médicaux suivants (l'oxygène, le monoxyde d'azote, l'air médical, le dioxyde de carbone, les mélanges d'oxygène et de monoxyde d'azote, aux systèmes de distribution des gaz suivants (l'air enrichi en oxygène, l'air moteur des instruments chirurgicaux, l'azote moteur des instruments chirurgicaux et aux systèmes d'alimentation en vide médical.
L'ISO 7396:2006 s'applique également aux extensions des systèmes de distribution installés, aux modifications des systèmes de distribution installés, aux modifications ou au remplacement des systèmes d'alimentation ou des sources d'alimentation.
Sistemi napeljav za medicinske pline - 1. del: Napeljave za stisnjene medicinske pline in podtlak (ISO 7396-1:2007)
Ta del ISO 7396 določa zahteve za načrt, namestitev, delovanje, dokumentacijo, preskušanje in usposobitev za zagon sistemov napeljav za stisnjene medicinske pline, pline za pogon kirurškega orodja in vakuum v zdravstvenih ustanovah, ki iz sistema napeljave zagotavljajo neprekinjeno oskrbo s pravim plinom in dovajanje vakuuma. Vključuje zahteve za sisteme oskrbe, cevovodne distribucijske sisteme, nadzorne sisteme, sisteme za spremljanje in alarm ter neizmenljivost med sestavnimi deli različnih plinskih sistemov. Ta del ISO 7396 velja za: a) sisteme napeljav za naslednje medicinske pline: - kisik; - dušikov oksid; - medicinski zrak; - ogljikov dioksid; - mešanice kisika/dušikovega oksida (glej Opombo 1); b) sisteme napeljav za naslednje pline: - s kisikom obogateni zrak; - zrak za pogon kirurškega orodja; - dušik za pogon kirurškega orodja; c) sisteme napeljav za vakuum. Ta del ISO 7396 velja tudi za: - podaljške obstoječih distribucijskih cevovodnih sistemov; - spremembe obstoječih distribucijskih cevovodnih sistemov; - spremembe ali zamenjavo sistemov oskrbe ali virov oskrbe.
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Medical gas pipeline systems - Part 1: Pipeline systems for compressed medical gases and vacuum (ISO 7396-1:2007)Sistemi napeljav za medicinske pline - 1. del: Napeljave za stisnjene medicinske pline in podtlak (ISO 7396-1:2007)Réseaux de distribution de gaz médicaux - Partie 1: Réseaux de distribution de gaz médicaux comprimés et de vide (ISO 7396-1:2007)Rohrleitungssysteme für medizinische Gase - Teil 1: Rohrleitungenssyteme für medizinische Druckgase und Vakuum (ISO 7396-1:2007)Ta slovenski standard je istoveten z:EN ISO 7396-1:2007SIST EN ISO 7396-1:2007en11.040.10Anestezijska, respiratorna in reanimacijska opremaAnaesthetic, respiratory and reanimation equipmentICS:SLOVENSKI
STANDARDSIST EN ISO 7396-1:200701-oktober-2007
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 7396-1April 2007ICS 11.040.10Supersedes EN 737-3:1998
English VersionMedical gas pipeline systems - Part 1: Pipeline systems forcompressed medical gases and vacuum (ISO 7396-1:2007)Réseaux de distribution de gaz médicaux - Partie 1:Réseaux de distribution de gaz médicaux comprimés et devide (ISO 7396-1:2007)Rohrleitungssysteme für medizinische Gase - Teil 1:Rohrleitungenssyteme für medizinische Druckgase undVakuum (ISO 7396-1:2007)This European Standard was approved by CEN on 24 February 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 7396-1:2007: E
EN ISO 7396-1:2007 (E)
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Foreword
This document (EN ISO 7396-1:2007) has been prepared by Technical Committee CEN/TC 215 "Respiratory and anaesthetic equipment", the secretariat of which is held by BSI, in collaboration with Technical Committee ISO/TC 121 "Anaesthetic and respiratory equipment".
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 October 2007, and conflicting national standards shall be withdrawn at the latest by April 2009.
This document supersedes EN 737-3:1998.
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 Annex ZA, which is an integral part of this document.
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.
EN ISO 7396-1:2007 (E)
3 Annex ZA (informative)
Relationship between this International Standard and the Essential Requirements of EU Directive 93/42/EEC on Medical devices
This International Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide one means of conforming to Essential Requirements of the New Approach Directive 93/42/EEC on Medical devices.
Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State, compliance with the clauses of this standard given in Table ZA 1 confers, within the limits of the scope of this standard, a presumption of conformity with the corresponding Essential Requirements of that Directive and associated EFTA regulations.
Table ZA 1— Correspondence between this International Standard and Directive 93/42/EEC, Medical devices
Clause(s)/Sub-clause(s) of this International Standard Essential Requirements (ERs) of EU Directive 93/42/EEC Qualifying remarks/Notes 4 1, 2, 7.1, 7.3
4.3.2 9.3
4.3.3 7.1
4.3.4 9.2, 9.3, 12.7.1
4.3.5 9.3
4.3.6 7.1, 9.3, 12.7.1
4.3.7 7.2, 7.6
4.3.8 7.2, 7.6
4.3.9 9.2
5.5.2.12 3, 9.2
4.4.1 2, 3
4.4.2 1, 2, 3, 4
5.1 to 5.2.7 1, 2, 3, 4, 7.6, 12.8.1, 12.8.2
5.2.8 3
5.3.1 to 5.3.4 2, 3, 7.6
5.3.5 7, 12.7.1
5.3.6 7, 12.7.1
5.3.7 7.1, 9.3
5.3.8 7.1
5.4 3
5.5.1 3, 12.8
5.5.2.1 to 5.5.2.10 3, 7.2, 12.8
5.5.2.11 7.6
5.5.2.13 12.7.2
5.5.3 3, 7.2, 7.6, 12.8
5.6 3, 7.2, 7.6, 9.3, 12.8
EN ISO 7396-1:2007 (E)
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Clause(s)/Sub-clause(s) of this International Standard Essential Requirements (ERs) of EU Directive 93/42/EEC Qualifying remarks/Notes 5.7.1 to 5.7.7 3, 8.1, 12.8.1
5.7.8 to 5.7.9 7,6, 8.1
5.7.10 12.7.2
5.8 to 5.10 2, 3
6 1, 2, 3, 4, 12.3, 12.8.1, 12.8.2, 12.9
7 1, 2, 3
7.1 9.3, 12.7.1
7.2.1 to 7.2.4 2, 3
7.2.5 9.2
7.2.6 9.2
7.3 2, 3, 4
7.4 2, 3, 12.8
8 1, 2
9 9.1, 12.7.4, 13.6 c)
9.3 9.2, 12.5, 12.6
10 13.2
11 1, 2, 3, 4, 9
11.1.3 12.6
12.1 to 12.4 1, 2, 3
12.5.1 9.3, 12.7.1, 9.2
12.5.2 7.5, 9.3, 12.7.1, 9.2
12.6.1 7.5, 12.7.1
12.6.2 to 12.6.9 2, 3, 7.5, 12.8
12.6.10 7.2
12.6.11 7.2
12.6.12 7.2
12.6.13 7.2
12.6.14 7.2
12.6.15 to 12.6.16 12.7.4, 12.8.1
13 4, 13.1, 13.3, 13.6 c), 13.6 d), 13.6 e), 13.6 k), 13.6 l), 13.6 m), 13.6 n)
WARNING: Other requirements and other EU Directives may be applicable to the products falling within the scope of this standard.
Reference numberISO 7396-1:2007(E)© ISO 2007
INTERNATIONAL STANDARD ISO7396-1Second edition2007-04-01Medical gas pipeline systems — Part 1: Pipeline systems for compressed medical gases and vacuum Réseaux de distribution de gaz médicaux — Partie 1: Réseaux de distribution de gaz médicaux comprimés et de vide
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ISO 7396-1:2007(E) © ISO 2007 – All rights reserved iiiContents Page Foreword.v Introduction.vi 1 Scope.1 2 Normative references.2 3 Terms and definitions.2 4 General requirements.7 4.1 (*) Safety.7 4.2 (*) Alternative construction.7 4.3 Materials.8 4.4 System design.9 5 Supply systems.10 5.1 System components.10 5.2 General requirements.10 5.3 Supply systems with cylinders or cylinder bundles.12 5.4 Supply systems with mobile or stationary cryogenic or non-cryogenic vessels.13 5.5 Supply systems for air.13 5.6 Supply systems with oxygen concentrator(s).17 5.7 Supply systems for vacuum.18 5.8 Location of supply systems.18 5.9 Location of cylinder manifolds.19 5.10 Location of stationary cryogenic vessels.19 6 Monitoring and alarm systems.19 6.1 General.19 6.2 Installation requirements.19 6.3 Monitoring and alarm signals.20 6.4 Provision of operating alarms.21 6.5 Provision of emergency clinical alarms.22 6.6 (*) Provision of emergency operating alarms.22 7 Pipeline distribution systems.22 7.1 Mechanical resistance.22 7.2 Distribution pressure.22 7.3 Low-pressure hose assemblies and low-pressure flexible connections.23 7.4 Double-stage pipeline distribution systems.24 8 Shut-off valves.24 8.1 General.24 8.2 Service shut-off valves.25 8.3 Area shut-off valves.25 9 Terminal units, gas-specific connectors, medical supply units, pressure regulators and pressure gauges.26 10 Marking and colour coding.27 10.1 Marking.27 10.2 Colour coding.27 11 Pipeline installation.27 11.1 General.27 11.2 Pipeline supports.28 11.3 Pipeline joints.29
ISO 7396-1:2007(E) iv © ISO 2007 – All rights reserved 11.4 Extensions and modifications of existing pipeline systems.29 12 Testing, commissioning and certification.29 12.1 General.29 12.2 General requirements for tests.30 12.3 Inspections and checks before concealment.30 12.4 Tests, checks and procedures before use of the system.30 12.5 Requirements for inspections and checks before concealment.31 12.6 Requirements for tests, checks and procedures before use of the system.31 12.7 Certification of the systems.36 13 Information to be supplied by the manufacturer.37 13.1 General.37 13.2 Instructions for use.37 13.3 Operational management information.38 13.4 “As-installed” drawings.38 13.5 Electrical diagrams.38 Annex A (informative)
Schematic representations of typical supply systems and area distribution systems.39 Annex B (informative)
Guidelines for location of cylinder manifolds, cylinder storage areas and stationary vessels for cryogenic or non-cryogenic liquids.62 Annex C (informative)
Example of procedure for testing and commissioning.63 Annex D (informative)
Typical forms for certification of the medical gas pipeline system.75 Annex E (informative)
Temperature and pressure relationships.105 Annex F (informative)
Risk management checklist.107 Annex G (informative)
Operational management.120 Annex H (informative)
Rationale.138 Bibliography.140
ISO 7396-1:2007(E) © ISO 2007 – All rights reserved vForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 7396-1 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 215, Respiratory and anaesthetic equipment, in collaboration with Technical Committee ISO/TC 121, Anaesthetic and respiratory equipment, Subcommittee SC 6, Medical gas systems, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). This second edition cancels and replaces the first edition (ISO 7396-1:2002), which has been technically revised. ISO 7396 consists of the following parts, under the general title Medical gas pipeline systems: ⎯ Part 1: Pipeline systems for compressed medical gases and vacuum ⎯ Part 2: Anaesthetic gas scavenging disposal systems
ISO 7396-1:2007(E) vi © ISO 2007 – All rights reserved Introduction Many healthcare facilities use pipeline systems to deliver medical gases and to provide vacuum to areas where they are used in patient care or to power equipment such as ventilators and surgical tools. This part of ISO 7396 specifies requirements for pipeline systems for compressed medical gases, gases for driving surgical tools and vacuum. It is intended for use by those persons involved in the design, construction, inspection and operation of healthcare facilities treating human beings. Those persons involved in the design, manufacture and testing of equipment intended to be connected to pipeline systems should also be aware of the contents of this document. This part of ISO 7396 seeks to ensure that medical gas pipelines contain only the specific gas (or vacuum) intended to be supplied. For this reason, gas-specific components are used for terminal units and for other connectors which are intended to be used by the operator. In addition, each system is tested and certified to contain only the specific gas (or vacuum). The objectives of this part of ISO 7396 are to ensure the following: a) non-interchangeability between different pipeline systems by design; b) continuous supply of gases and vacuum at specified pressures by providing appropriate sources; c) use of suitable materials; d) cleanliness of components; e) correct installation; f) provision of monitoring and alarm systems; g) correct marking of the pipeline system; h) testing, commissioning and certification; i) purity of the gases delivered by the pipeline system; j) correct operational management. Annex H contains rationale statements for some of the requirements of this part of ISO 7396. It is included to provide additional insight into the reasoning that led to the requirements and recommendations that have been incorporated in this part of ISO 7396. The clauses and subclauses marked with (*) after their number have a corresponding rationale contained in Annex H.
INTERNATIONAL STANDARD ISO 7396-1:2007(E) © ISO 2007 – All rights reserved 1Medical gas pipeline systems — Part 1: Pipeline systems for compressed medical gases and vacuum 1 Scope This part of ISO 7396 specifies requirements for design, installation, function, performance, documentation, testing and commissioning of pipeline systems for compressed medical gases, gases for driving surgical tools and vacuum in healthcare facilities to ensure continuous delivery of the correct gas and the provision of vacuum from the pipeline system. It includes requirements for supply systems, pipeline distribution systems, control systems, monitoring and alarm systems and non-interchangeability between components of different gas systems. This part of ISO 7396 is applicable to: a) pipeline systems for the following medical gases: ⎯ oxygen; ⎯ nitrous oxide; ⎯ medical air; ⎯ carbon dioxide; ⎯ oxygen/nitrous oxide mixtures (see Note 1); b) pipeline systems for the following gases: ⎯ (*) oxygen-enriched air; ⎯ air for driving surgical tools; ⎯ nitrogen for driving surgical tools; c) pipeline systems for vacuum. This part of ISO 7396 also applies to: ⎯ extensions of existing pipeline distribution systems; ⎯ modifications of existing pipeline distribution systems; ⎯ modifications or replacement of supply systems or sources of supply. NOTE 1 Regional or national regulations can prohibit the distribution of oxygen/nitrous oxide mixtures in medical gas pipeline systems. (*) NOTE 2 EN 14931 [23] defines additional or alternative requirements for the specific application, in particular for flows and pressures of compressed air required to pressurize the hyperbaric chambers and to drive other connected services and of oxygen and other treatment gases administered to patients.
ISO 7396-1:2007(E) 2 © ISO 2007 – All rights reserved 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. ISO 3746, Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Survey method using an enveloping measurement surface over a reflecting plane ISO 5359, Low-pressure hose assemblies for use with medical gases ISO 8573-1:2001, Compressed air — Part 1: Contaminants and purity classes ISO 9170-1, Terminal units for medical gas pipeline systems — Part 1: Terminal units for use with compressed medical gases and vacuum ISO 10083, Oxygen concentrator supply systems for use with medical gas pipeline systems ISO 10524-2, Pressure regulators for use with medical gases — Part 2: Manifold and line pressure regulators ISO 11197, Medical supply units ISO 14971, Medical devices — Application of risk management to medical devices ISO 15001:2003, Anaesthetic and respiratory equipment — Compatibility with oxygen ISO 21969, High-pressure flexible connections for use with medical gas systems IEC 60601-1-8, Medical electrical equipment — Part 1-8: General requirements for safety — Collateral standard: General requirements, tests and guidance for alarm systems in medical electrical equipment and medical electrical systems EN 286-1, Simple unfired pressure vessels designed to contain air or nitrogen — Part 1: Pressure vessels for general purposes EN 1041, Information supplied by the manufacturer with medical devices EN 13348, Copper and copper alloys — Seamless, round copper tubes for medical gases or vacuum 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 air compressor system supply system with compressor(s) designed to provide medical air or air for driving surgical tools or both 3.2 air for driving surgical tools natural or synthetic mixture of gases, mainly composed of oxygen and nitrogen in specified proportions, with defined limits for the concentration of contaminants, supplied by a medical gas pipeline system and intended for driving surgical tools NOTE Different names or symbols are used for air for driving surgical tools, such as instrument air, surgical air, air motor, air - 700 and air - 800.
ISO 7396-1:2007(E) © ISO 2007 – All rights reserved 33.3 branch portion of the pipeline distribution system which supplies one or more areas on the same floor of the facility 3.4 commissioning proof of function to verify that the agreed system specification is met and is accepted by the user or his representative 3.5 control equipment items necessary to maintain the medical gas pipeline system within the specified operating parameters NOTE Examples of control equipment are pressure regulators, pressure-relief valves, alarms, sensors, manual or automatic valves and non-return valves. 3.6 cryogenic liquid system supply system containing a gas stored in the liquid state in a vessel at temperatures lower than −150 °C 3.7 cylinder bundle pack or pallet of cylinders linked together with one or more connectors for filling and emptying 3.8 diversity factor factor which represents the maximum proportion of terminal units in a defined clinical area which will be used at the same time, at flowrates defined in agreement with the management of the healthcare facility 3.9 double-stage pipeline distribution system pipeline distribution system in which gas is initially distributed from the supply system at a pressure higher than the nominal distribution pressure, and is then reduced to the nominal distribution pressure by line pressure regulator(s) NOTE This initial higher pressure is the nominal supply system pressure (see 3.32). 3.10 emergency clinical alarm alarm to indicate to medical and technical staff that there is abnormal pressure within a pipeline that requires an immediate response 3.11 emergency inlet point inlet point which allows the connection of an emergency supply 3.12 emergency operating alarm alarm to indicate to technical staff that there is abnormal pressure within a pipeline that requires an immediate response 3.13 emergency supply source of supply intended to be connected to an emergency inlet point 3.14 gas-specific having characteristics which prevent connections between different gas services
ISO 7396-1:2007(E) 4 © ISO 2007 – All rights reserved 3.15 gas-specific connector connector with dimensional characteristics which prevent connections between different gas services NOTE Examples of gas-specific connectors are quick connectors, screw-threaded connectors, diameter-indexed safety system (DISS) connectors or non-interchangeable screw-threaded (NIST) connectors. 3.16 high-dependency patient patient with a continual need of a medical gas/vacuum supply, who will be adversely affected by a medical gas/vacuum supply failure to such a degree that his/her clinical condition or his/her safety can be compromised 3.17 information signal visual indication of normal status 3.18 line pressure regulator pressure regulator intended to supply the nominal distribution pressure to the terminal units 3.19 low-pressure hose assembly assembly consisting of a flexible hose with permanently attached gas-specific inlet and outlet connectors and designed to conduct a medical gas at pressures less than 1 400 kPa 3.20 main line portion of the pipeline distribution system connecting the supply system to risers and/or branches 3.21 maintenance s
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