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<strong>IGC</strong> DOC 97/03 1. Introduction In all European countries, the valve outlet connections for gas cylinders have been developed more or less independently from each other. The consequence is that for one gas, different connections are being used across Europe. Although the connections used in the respective countries are safe they are not compatible with those used in other countries. This Document was prepared to facilitate harmonisation of the gas cylinders valve outlets across Europe. The wish of the Industry is to have the possibility to keep the national valves outlets. The NEVOC (New European Valve Outlet Connections) system is intended to be used in case of the need for new outlets to facilitate future harmonisation. The industry (EIGA Companies) have agreed to commit themselves to use, in case of the need for new outlets, the ones corresponding to the NEVOC system. For example, if for a 200 bar outlet 2 different groups of gases are used, e.g. same outlet for oxygen (oxidising) and nitrogen (asphyxiating) and if this country decides to differentiate oxidising gases from asphyxiating gases, the corresponding oxidising and asphyxiated outlet of the NEVOC system should be used. Another example concerns new applications such as 300 bar outlets; the corresponding 300 bar outlet of the NEVOC system shall be used. The current national connections systems are listed in part 1 of this document. They can continue to be used in the country concerned. The new connections system is based on ISO 5145 and represents a «New European Valve Outlet Connections (NEVOC) 2. Scope This document applies to valve outlet connections for gas cylinders. Part 1 lists the outlet connections which at present are being used in the CEN members states. Part 2 explains how to select a new valve outlet connection from ISO 5145. Part 1 Valve outlet connections for gas cylinders listed in part 1 (national connections) may be used in those CEN member states, which are assigned to the respective connections. In the event that the current national connections are being replaced by new ones, for whatever reasons, then connections according to part 2 of this document should be chosen. Part 2 This describes the valve outlet connections for gas cylinders, which represented a New European Outlet Connection (NEVOC) based upon ISO 5145. Note The following are excluded from this document: • Ultra high integrity service valve outlets (see ISO 10692-1). • Valve outlets for small medical gas cylinders (< 5 litres) see EN 850 and ISO 407. • Valve outlets for LPG cylinders (but included are valve outlets for pure Propane, Butane). • Valve outlets for cryogenic gas withdrawal. 1
<strong>IGC</strong> DOC 97/03 3. Part 1: National threaded valve outlets used in 18 European countries Annexes Part 1 Annex 1 List of connections used Annex 1 A Valve outlets for toxic gases Annex 1 B Valve outlets for flammable gases Annex 1 C Valve outlets for oxidising gases Annex 1 D Valve outlets for inert gases Annex 2 A Different shapes of valve outlets - External diameter Annex 2 B Different shapes of valve outlets - Internal diameter Annex 3 Drawing of connections having the same basic dimensions (classified by country) Annex 4 Table of connections having the same basic dimensions (classified by country) 4. Part 2: New European Valve Outlet Connections (NEVOC) recommendation EIGA recommends, that if there is a requirement for a new valve outlet, e.g. due to pressure increase, new gas mixture or for a new medical gas mixture, then the valve outlet corresponding to this new application shall be selected in accordance with the latest version of ISO 5145 2003. Annexes Part 2 Annex 1 Adapters (example for nitrogen) 5. References EN 720-1 Classification of gases and gas mixtures Part 1 – Gas and gas mixtures – Properties of gases EN 720-2 Classification of gases and gas mixtures Part 2 – Gas and gas mixtures – Determination of fire potential and oxidising ability ISO 5145 Cylinder valve outlet for gases and gas mixtures – Selection and dimensioning EN 850 Transportable gas cylinders – Pin – index, yoke-type valve outlet connections for medical use. ISO 407 Small medical gas cylinders- Pin – index, yoke-type connections. ISO 10692-1 Connections for gas cylinder valves for ultra-high integrity service – Part 1: Outlet connections. ISO 3166 Code for the representation of names of countries 6. Adapters Due to the fact that it is expected to have two parallel valve outlet connection systems in Europe for a long period of time: a) National valve outlet standards (Part1) b) New European valve outlet connections (Part 2) There are two choices to provide interchangeability: 1) Equipment used connected to the cylinder valve should be changed to the appropriate valve outlet connection of the new European valve outlet connection in order to ensure safe operation. 2
Page 1 and 2: VALVE OUTLET CONNECTIONS FOR GAS CY
Page 3: IGC DOC 97/03 Table of Contents 1.
Page 7 and 8: IGC Part 1 Annex 1 List of connecti
Page 9 and 10: IGC Part 1 Annex 1A Valve Outlets f
Page 17 and 18: IGC Part 1 Annex 1B Valve Outlets f
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Page 21 and 22: IGC Part 1 Annex 1D Valve Outlets f
Page 23 and 24: IGC DOC 97/03 Part 1 Annex 2B Diffe
Page 25 and 26: IGC Part 1 Annex 4 Table of Connect
Page 27 and 28: IGC Part 1 Annex 4 Table of Connect

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