1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58ICS 23.020.30Gas cylinders Safe handlingBRITISH STANDARDBS ISO 11625:2007BS ISO 11625:2007This Brit
2、ish Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2007 BSI 2007ISBN 978 0 580 55545 9Amendments issued since publicationAmd. No. Date Commentscontract. Users are responsible for its correct application.Compliance with a British Standard canno
3、t confer immunity from legal obligations.National forewordThis British Standard is the UK implementation of ISO 11625:2007. The UK participation in its preparation was entrusted by Technical Committee PVE/3, Gas containers, to Subcommittee PVE/3/7, Gas cylinder (receptacle) operations.A list of orga
4、nizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a Reference numberISO 11625:2007(E)INTERNATIONAL STANDARD ISO11625Second edition2007-08-15Gas cylinders Safe handling Bouteilles gaz Scurit
5、 de manutention BS ISO 11625:2007ii iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Content identification. 2 5 Safe handling requirements 2 5.1 General. 2 5.2 User responsibilities. 3 6 Use of gas cylinders. 6 6.1 General. 6 6.2 Labels
6、 and safety data sheets (SDS) 6 6.3 Connecting cylinders and withdrawing content 6 6.4 Cylinder valve 6 6.5 Non-return valves . 7 6.6 Flame arrestor and shut-off device. 7 6.7 Manifolds . 7 6.8 Gas tightness of connections . 7 6.9 Residual cylinder pressure 7 6.10 Removing pressure regulator 7 6.11
7、Changing equipment service. 7 6.12 Ventilation 8 6.13 Securing cylinders 8 6.14 Precautions for oxidizing gases 8 6.15 Oxygen concentration in work areas 8 6.16 Asphyxiation by inert gases 8 6.17 Hazards due to corrosive or toxic gases 8 6.18 Emergency precaution and required equipment. 8 7 Storage.
8、 9 7.1 General. 9 7.2 Hazard class 9 7.3 Storage (all hazard classes) 9 7.4 Storage by hazard class. 10 Bibliography . 13 BS ISO 11625:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prep
9、aring 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
10、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
11、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
12、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 11625 was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 4, Operational requirem
13、ents for gas cylinders. This second edition cancels and replaces the first edition (ISO 11625:1998) which has been technically revised. BS ISO 11625:2007vIntroduction The following guidelines are for everyone who handles gas cylinders, and are based upon experience. Some precautions are also applica
14、ble to gas suppliers and distributors. It should not be assumed that every applicable safety precaution or regulation is contained herein. Gas cylinders are constructed, maintained and used in accordance with applicable regulations and are safe for the purposes for which they are intended. Accidents
15、 occurring during the transportation, handling, usage and storage of these cylinders can often be traced to failure to follow the guidelines set forth in this International Standard. Users of compressed, liquefied or dissolved gases should become familiar with the properties and inherent hazards of
16、the products they use. Valuable information pertaining to each specific gas is contained within its product labelling and safety data sheet. BS ISO 11625:2007blank1Gas cylinders Safe handling 1 Scope This International Standard specifies requirements for safe handling, use and storage of gas cylinde
17、rs for compressed, liquefied or dissolved gases. This International Standard applies only to single gas cylinders of sizes from 0,5 I to 150 I water capacity. For specific gas applications such as welding, diving, inerting, etc., additional requirements apply which are not covered in this Internatio
18、nal Standard. Maintenance, repair, marking, labelling, inspection and retesting of gas cylinders, which are normally under the responsibility of the gas cylinder owner, are also not included in this International Standard. 2 Normative references The following referenced documents are indispensable f
19、or 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 32, Gas cylinders for medical use Marking for identification of content ISO 5145:2004, Cylinder val
20、ve outlets for gases and gas mixtures Selection and dimensioning ISO 7225, Gas cylinders Precautionary labels ISO/TR 7470, Valve outlets for gas cylinders List of provisions which are either standardized or in use ISO 10286, Gas cylinders Terminology ISO 11117, Gas cylinders Valve protection caps an
21、d valve guards Design, construction and tests ISO 13769, Gas cylinders Stamp marking 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 10286 and the following apply. 3.1 air line mask breathing mask connected to a pipeline (the air line) with breathabl
22、e air 3.2 handling moving, connecting or disconnecting a gas cylinder under normal conditions of use BS ISO 11625:20072 3.3 manifold gas distribution system that transfers product through multiple inlets from gas cylinders to the supply pipeline to the point(s) of use NOTE The pressure regulator, no
23、n-return device(s), flame arrestor (acetylene) and gauges can be integrated in the manifold. 3.4 misuse utilizing a gas cylinder for a purpose other than that for which it was made, e.g., roller, support, etc. 3.5 label information durably attached to the cylinder or indicated by an adherent and cle
24、arly visible means such as printing, stencilling or any other equivalent process 3.6 supplier any entity that manufactures and packages gas 3.7 transfilling transfer of gas from one cylinder to another 3.8 user any entity other than a supplier 4 Content identification Cylinders offered for shipment
25、shall have their contents identified as prescribed by relevant national and/or international regulations and standards. Content identification shall be present during the transportation, delivery to user and during use. The primary and only accurate identifier of cylinder content is the cylinder lab
26、el (see ISO 7225). Cylinders may be painted (colour coded, see ISO 32) to permit recognition of the contents or hazard and to permit segregation more readily in gas supplier handling operations. The user should read the label to verify that the correct gas ordered has been supplied. Cylinders that d
27、o not bear a legible label to identify the content or cylinders that bear more than one label with contradictory identification shall not be used. They shall be returned to the supplier, unused, together with appropriate explanations. 5 Safe handling requirements 5.1 General Gas cylinders shall be h
28、andled and used only by properly trained persons. The following rules apply to all gas cylinders. BS ISO 11625:200735.2 User responsibilities 5.2.1 General The user is responsible for the safe use and handling of the cylinder and its contents. When cylinders are rented, on an exchange programme or o
29、therwise owned by a distributor, gas supplier or other such entity, the user shall maintain and care for the cylinder to ensure that it is returned or exchanged in the same safe condition as it was received. If the user has any difficulty understanding any of the precautions and requirements in this
30、 International Standard, concerning the gas cylinder, the user shall contact the cylinder supplier before the gas is used. The user shall inform the supplier if the gas cylinder has been misused or damaged. 5.2.2 Prescribed markings Markings on cylinders are required by the relevant authority. Marki
31、ngs shall be clear and legible while the cylinder is in service. The user shall not add, remove or alter any of the markings on the cylinder (see ISO 13769) unless specifically allowed by the relevant authority. 5.2.3 Labels If applied, labels shall be clear and legible. The user shall not deface, a
32、lter or remove any labels. 5.2.4 Cylinder modifications The user shall not modify, tamper with, obstruct, remove or repair any part of the cylinder or valve including the pressure relief device, retest ring and other accessories if so equipped. The user shall not alter or modify (for any reason) the
33、 colour of the cylinder unless the user has received authorization to do so from the owner. 5.2.5 Contamination Contamination can occur when foreign substances, other gases, process materials or fluids enter the cylinder through the valve. If contamination has occurred or is suspected, the user shal
34、l identify and clearly mark the cylinder and shall notify the gas supplier of details on the contamination. It is the users responsibility to ensure the valve is closed during transport to the supplier. 5.2.6 Misuse Gas cylinders shall not be used as rollers, supports or for any purpose other than t
35、o deliver the gas content. 5.2.7 Electrical circuits Cylinders shall not be placed where they become part of an electrical circuit. When gas cylinders are used in conjunction with electric welding, they shall not be used for earthing (grounding) of electrical equipment. Arc welding near gas cylinder
36、s should be avoided. The use of a cylinder to test the arc performance shall not be allowed. Observing these precautions will prevent the cylinder from being arc burned. 5.2.8 Magnetic resonance imaging (MRI) Cylinders and accessories with ferritic (magnetic) material (in most cases steel cylinders)
37、 shall not be used in the proximity of magnetic resonance imaging (MRI) equipment. There is the risk of personal injury/fatality and equipment damage from such cylinders being magnetically attracted by the unit. BS ISO 11625:20074 5.2.9 Temperature limits Gas cylinders shall not intentionally be exp
38、osed to temperatures above 65 C. Never apply a flame or heat directly to any part of a gas cylinder or allow it to come in contact with an electrically energized system. If ice or snow accumulates on a cylinder or related accessories, with permission of the supplier, thaw the cylinder at room temper
39、ature or with water at a temperature not exceeding 50 C. In the event that the cylinder has been accidentally heated above these temperatures, the user shall segregate the cylinder and notify the supplier. In the case where the supplier is not the owner of the cylinder, it shall be the responsibilit
40、y of the supplier to pass this information along to the owner. Cylinders shall not be subjected to artificially created low temperatures without the approval of the supplier. Cylinders are designed for use under ambient conditions; normally the temperatures for design are 20 C to + 50 C. Gas cylinde
41、rs that have been in, or exposed to fire shall not be shipped if they still contain gas under pressure. Consult the gas supplier prior to returning such cylinders. NOTE 1 Cylinders exposed to elevated temperatures can suffer mechanical damage, which could lead to an unsafe cylinder. Certain material
42、s and alloys (such as aluminium or non-metallic valve components) are more susceptible to temperature elevations, but cylinders of all materials can suffer mechanical damage from elevated temperatures. NOTE 2 Acetylene cylinders with elevated temperatures pose the risk of gas decomposition. 5.2.10 L
43、eaking cylinders Do not use a cylinder found to be leaking. Only trained and prepared personnel who have knowledge of the gas hazard(s) and who have proper protective equipment shall handle a leaking cylinder. If the hazard of the gas warrants it, all other personnel should be evacuated from the are
44、a, and emergency response people should be allowed to handle the situation. When personnel are addressing a leaking cylinder, it can be moved to a well-ventilated area or contained so that the leaking gas poses no threat to human health or life. NOTE If the leaking cylinder contains corrosive or tox
45、ic gas, consider emergency action by placing it in a special cylinder containment vessel (e.g. salvage container) for disposal. 5.2.11 Corrosion and other damage If a cylinder or valve is noticeably damaged or corroded, the gas supplier shall be notified, and his instructions followed. Any other dam
46、age that might impair the safety of the cylinder during use or transportation shall be called to the attention of the gas supplier before the return of the cylinder. 5.2.12 Discharging gas The discharge of contents from any gas cylinder shall not be directed toward any person. Corrosive or toxic gas
47、es shall not be discharged directly to the atmosphere. The user shall return cylinders containing these gases to the supplier for proper disposal. Flammable gases under certain conditions may be discharged only under controlled conditions as recommended by the supplier. Discharging gas can cause a v
48、ariety of injuries to the body especially the eyes and hands. In the event of a release, precautions should be taken to prevent potentially hazardous accumulations, e.g. toxic, asphyxiant, flammable, etc. 5.2.13 Non-refillable cylinders Non-refillable cylinders shall not be refilled after use of ori
49、ginal contents. After usage, such cylinders shall be disposed of in accordance with the cylinder suppliers recommendations and national regulations. BS ISO 11625:200755.2.14 Valve protection Valves are designed either to have inherent valve protection or they require a protection device. Except for guards/shrouds noted below, when valve protection is provided by the supplier, the user shall keep such devices on the cylinder except when cylinders are connected to dispensing equipment. For a complete description of v
