EN 720-1-1999 en Transportable Gas Cylinders - Gases and Gas Mixtures - Part 1 Properties of Pure Gases《可运输气瓶 气体和气体混合物 第1部分 纯气体的特性》.pdf
《EN 720-1-1999 en Transportable Gas Cylinders - Gases and Gas Mixtures - Part 1 Properties of Pure Gases《可运输气瓶 气体和气体混合物 第1部分 纯气体的特性》.pdf》由会员分享,可在线阅读,更多相关《EN 720-1-1999 en Transportable Gas Cylinders - Gases and Gas Mixtures - Part 1 Properties of Pure Gases《可运输气瓶 气体和气体混合物 第1部分 纯气体的特性》.pdf(11页珍藏版)》请在麦多课文档分享上搜索。
1、 STD-BSI BS EN 720-1-ENGL 1999 I 1624667 O90b2 UT3 II BRITISH STANDARD Tkansportable gas cylinders - Gases and gas mixtures - Part 1: Properties of pure gases The European Standard EN 720-1: 1999 has the status of a Briish Standad ICs 23.020.30; 71.100.20; 75.160.30 BS EN 720-hl999 NO COPYING WITHOU
2、T ES1 PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN 720-3-ENGL L999 3624bb9 07eIcDb83 T35 sl been prepared under the Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 August 1999 direction of the Engineering Amd. No. O BSI 08-1
3、999 ISBN O 580 32138 X BS EN 720-11999 Date Comments National foreword This British Standard is the English language version of EN 720-1: 1999. The UK participation in its preparation was entrusted by Technical Committee PvE/3, Gas containers, to Subcommittee pvE1/3/1, Valve fittings for gas cylinde
4、rs, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible intemationaJ/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related intemationai and European developments and pro
5、mulgate them in the UK A iist of organizations represented on this subcommittee an be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the
6、 section entitled “International standards Correspondence Index”, or by using the “Find” facility of the BSI Stan* Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application
7、. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright notice displayed throughout this do
8、cument indicates when this document was last issued. STD.BSI BS EN 720-1-ENGL 1799 I Lb24bb7 0790684 771 R EUROPEAN WANDARD NO= EUR0PEE”E RTROP NORM EN 720.1 April 1999 ICs 23.020.30; 71.100.20; 75.160.30 English version Vansportable gas cyljndem - Gases and gas mixtures - Part 1: Properties of pure
9、 gases Bouteilles gaz transportables - Gaz et mlanges de gaz- Gasgemkche - Parie 1: Pmpri6th des gaz purs Ortsbeweghche Gasnaschen - Gase und Teil 1: Eigenschatten von %el - Gasen This European standard was approved by CEN on 20 December 1998. CEN members are bound to comply with the CENKENELEC Inte
10、rnal Regulations which stipdate 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 obtajned on application to the Central Secretariat or to any CEN member
11、. This European Standard exists in three official versions (English, French, German). A version in any other ianguage made by translation under the responsibility of a CEN member into its own language and notified to the Centsal Secretariat has the same status as the official versions. CEN members a
12、re the national standasds bodies of Awb5a, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, IW, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. European Committee for Standardization Camit6 Europen de Normalisation Europi
13、sches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1060 Brussels O 1999 CEN AU rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 720-11999 E STD-BSI BS EN 720-L-ENGL 3999 W Lb24bb9 0790b05 806 Page 2 EN 720-1:1999 Foreword T
14、his European Standard has been prepared by khnicd Committee CENmC 23, Ii-ansportable gas cylinders, the Secretanat 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 October
15、1999, and conflicting national standards shall be withdrawn at the latest by October 1999. Accorduig to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European standard: Austria, Belgium, Czech Republic, Denmark, Finl
16、and, France, Germany, Greece, Iceland, Ireland, Ita - compressed; - dissolved 3.4 corrosiveness ability of the gas to damage or to destroy extemal living tissues (eyes and skin). Gases are assigned a corrosiveness category This is not to be confused with corrositivity of gases with metallic makriais
17、 (see EN IS0 111141) 4 Properties of gas mixtures From the properties of the Vanous components given in clause 6, the properties of the gas mixtures may be determined by using the appropriate standard on gas mixtures concerning each of the physicochemical criteria indicated in clause 1 (see EN 720-2
18、 for the re potential). O BSI 08-1999 STD.BS1 BS EN 720-1-ENGL 1999 m lb24bb9 0790b87 bBO .I Page 4 EN 720-1:1999 5 Code number ?b be able to recognize the properties of a gas, a code each gas is based on the following four 6.3 State of the gas in the cylinder at 15 OC (category III) 8 subdivisions:
19、 number WC) is given. This code number assign Category I: Category II: Category III: Category IV: fire potentiai, defining the gas behaviour with respect to flammability (see 3.1); toxicity determined by the 50 % lethal concentration (see 3.2): Subdivision 1: liquefied gas at over 35 bw, Subdivision
20、 2: liquid withdrawal - liquefied gas Subdivision 3: dissolved gas; (optionai); II Subdivision 4: 35 bar or less - gas only (including cryogenic gas withdrawal); gas state, defining the physical state of the contents in the cylinder at 15 OC within a given pressure range (see 3.3); corrosiveness (se
21、e 3.4). Subdivision 6: medium pressure range, compressed gases from 35 bar up to and including 250 bar; Subdivision 7: hiah pressure range, above 250 bar Each category is composed of Merent Sub-diWions, a supports combustion (oxidizing gas having an oxidant potential equal to or less than that of ai
22、r); flammable (gas having flammable limits in air) (see 3.1); spontaneously fiammable; highiy oxidizing (see 3.1) (oxidizing gas having an oxidant potential greater than that of air); fiammable and subject to decomposition or polymerization. For corrosiveness, gases are divided into 4 subdivisions:
23、Subdivision O non-corrosive; Subdivision 1: non-halogen acid forming; Subdivision 2: basic; Subdivision 3: halogen acid forming. 6.6 Designation of the code This code is called E“rsc code: F: E fortoxicity; for fire potentia S: for gas state, defining the physical state of the contents in the cylind
24、er at 15 OC with a given pressure range; 5.2 Toxicity (category II) For toxicity, gases are divided into five subdivisions: Subdivision O: Subdivision 1: Subdivision 2: Subdivision 3: Subdivision 9: life supporting; asphyxiant (when LC50 is greater than 15 O00 p.p.m.V); toxic and asphyxiant (when 20
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