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1、BRITISH STANDARD BS IEC 60877:1999 Procedures for ensuring the cleanliness of industrial-process measurement and control equipment in oxygen service ICS 25.040.40 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 60877:1999 This British
2、 Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 May 1999 BSI 03-2000 ISBN 0 580 32399 4 National foreword This British Standard reproduces verbatim IEC 60877:1999 an
3、d implements it as the UK national standard. It supersedes BS 6869:1987 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee GEL/65, Measurement and control, to Subcommittee GEL/65/2, Elements of systems, which has the responsibility to: aid enquirers to u
4、nderstand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented
5、 on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, p
6、ublications may contain identifiers from both systems. 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 section entitled “International Standards Correspondence Index”, or
7、by using the “Find” facility of the BSI Standards 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. Compliance with a British Standard does not of itself confer im
8、munity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the IEC title page, pages ii to iv, pages 1 to 6 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be
9、indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 60877:1999 BSI 03-2000i Contents Page National forewordInside front c
10、over Forewordiii Text of IEC 608771 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, n
11、a, Sun Nov 26 07:17:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 60877:1999 ii BSI 03-2000 Contents Page Forewordiii 1Scope1 2Reference document1 3Procedures1 3.1Orders for equipment for oxygen service1 3.2Cleaning1 3.3Cleanliness inspection4 3.4Drying5 3.5Handling and assembling inside the
12、manufacturers plant5 3.6Painting and identification6 3.7Lubricants and seals6 3.8Testing and calibration6 3.9Inspection6 3.10Warning6 3.11Packaging for protection during transportation, storage, handling and for identification6 3.12Installation6 Table 1 Industrial solvents3 Table 2 Classification of
13、 solvents3 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 60877:1999 BSI 03-2000iii Foreword 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechni
14、cal committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation
15、is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with
16、 the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant s
17、ubjects since each technical committee has representation from all interested National Committees. 3) The documents produced have the form of recommendations for international use and are published in the form of standards, technical reports or guides and they are accepted by the National Committees
18、 in that sense. 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC Standard and the corresponding national or re
19、gional standard shall be clearly indicated in the latter. 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with one of its standards. 6) Attention is drawn to the possibility that some of the elements
20、of this International Standard may be the subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical committees is to prepare International Standards. In exceptional circumstances, a technical committee may propose th
21、e publication of a technical report of one of the following types: type 1, when the required support cannot be obtained for the publication of an International Standard, despite repeated efforts; type 2, when the subject is still under technical development or where for any other reason there is the
22、 future but not immediate possibility of an agreement on an International Standard; type 3, when a technical committee has collected data of a different kind from that which is normally published as an International Standard, for example “state of art”. Technical reports of types 1 and 2 are subject
23、 to review within three years of publication to decide whether they can be transformed into International Standards. Technical reports of types 3 do not necessarily have to be reviewed until the data they provide are considered to be no longer valid or useful. This second edition of IEC 60877, which
24、 is a technical report of type 3 has been prepared by subcommittee 65B: Devices, of IEC technical committee 65: Industrial-process measurement and control. The text of this technical report is based on the following documents: Full information on the voting for the approval of this technical report
25、can be found in the reports on voting indicated in the above table. Six months rule/Two months procedure/Committee draftReport on voting 6 months rule65(CO)2965(CO)32 2 months procedure65(CO)3465(CO)37 Committee draft65B/328/CDV65B/366/RVC Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17
26、:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 07:17:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 60877:1999 BSI 03-20001 1 Scope This report outlines the procedures for cleaning industrial-process measurement and control equipm
27、ent to be used for oxygen service, verifying this cleanliness and ensuring that the cleanliness of the equipment will be maintained up to the stage where the equipment is installed. This report does not apply to measurement and control equipment for welding, which is covered by ISO 5171. Oxygen serv
28、ice is defined as equipment or part thereof being in contact with oxygen-rich gas mixtures and other oxydizing gases (e.g. laughing gas). Greases, oils, thread lubricants, dirt, water, filings, paints, varnishes, scales, powder, etc., shall be removed because many of these materials, in particular o
29、ils and hydrocarbon greases, can react violently in the presence of oxygen and initiate fires or explosions. This report consequently covers the cleanliness procedures for the preparation, assembling, inspection, protection during transportation, storage and handling and installation of equipment, a
30、ccessories or replacement parts intended for oxygen service. NOTEMany factors can influence the reaction in the presence of oxygen. Those may be: a higher oxygen pressure; a higher temperature; the fact that oxygen flows, or is only present as a static pressure within equipment or part thereof. 2 Re
31、ference document ISO 5171:1995, Pressure gauges used in welding, cutting and allied processes. 3 Procedures In preparing, cleaning and assembling any equipment, accessory or part for oxygen service, the following procedures shall be explicitly observed. 3.1 Orders for equipment for oxygen service Ea
32、ch order shall specify that the equipment and/or accessories are to be cleaned, prepared, marked and packed for use in oxygen service. Any order for replacement parts issued separately from the orders for equipment and/or accessories shall also state clearly that the parts so ordered are to be clean
33、ed, prepared, marked, and packed for use in oxygen service. 3.2 Cleaning Prior to cleaning, the materials used in the equipment, accessory or part, and their surface finish shall be checked in order to determine the appropriate manner of cleaning and the suitable cleaning agent. All foreign material
34、 such as mill scale, dirt, grit, solid objects and hydrocarbons shall be removed. Removal may be accomplished by grinding, wire brushing, blast cleaning, sweeping, vacuuming, swabbing, etc. All particles resulting from the grinding and wire brushing operations shall be thoroughly removed. 3.2.1 Mech
35、anical cleaning This type of cleaning may be accomplished by blast cleaning, wire brushing or grinding. 3.2.1.1 Blast cleaning Blast cleaning may be described as the use of abrasives propelled through nozzles against the surface of pipe, fittings or cavities to remove mill scale, rust, varnish, pain
36、t or other foreign matter; when resorted to, blast cleaning forms part of the manufacturing process. The medium propelling the abrasive shall be oil-free unless the oil is to be removed by subsequent cleaning. Specific abrasive materials shall be suitable for performing the cleaning without depositi
37、ng contaminants that cannot be removed by subsequent cleaning. Care shall be taken when blast cleaning so as to not remove an excessive amount of parent metal. The blasting medium and residue shall be removed to meet the cleanliness levels suggested herein for oxygen service equipment, accessory or
38、part. 3.2.1.2 Wire brushing or grinding Accessible surfaces may be wire brushed. Welds may be ground and wire brushed to remove slag, grit or excess weld material. Carbon steel wire brushes shall not be used on aluminium or stainless steel surfaces. Any wire brushes previously used on carbon steel s
39、hall not be used on aluminium or stainless steel surfaces. 3.2.1.3 Tumbling Tumbling can be described as a cleaning method that uses a quantity of hard abrasive material placed in a cavity to clean the internal surfaces. The cavity and the abrasive are energized so as to impart relative motion betwe
40、en the abrasive material and the cavity. This method can also be used to clean the outside surfaces of small components placed inside the container with or without the abrasive material. When resorted to, tumbling forms part of the manufacturing process. Licensed Copy: sheffieldun sheffieldun, na, S
41、un Nov 26 07:17:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 60877:1999 2 BSI 03-2000 3.2.1.4 Swabbing, vacuuming Equipment, parts or piping may be vacuum cleaned after mechanical cleaning to remove loose particles or dirt and slag. If vacuum cleaning is not possible, the surfaces may be swa
42、bbed with a suitable solvent using a clean lint-free cloth to remove loose dirt, slag, etc. 3.2.1.5 Hot water and steam cleaning Hot water and steam cleaning may be used as a preliminary degreasing operation. However, this practice is not recommended as degreasing efficiency is low, and drying after
43、 cleaning is slow and difficult. 3.2.1.6 Blowing and drying After the equipment, parts and piping have been mechanically cleaned and any abrasive material removed, the assembled piping should be blown with dry, dust and oil-free air or nitrogen to remove small particles. 3.2.2 Degreasing methods 3.2
44、.2.1 Procedure selection The cleaning procedure selected, which includes removal of the cleaning agent, will depend on several factors such as the following: a) the nature of the contaminants; b) the location and degree of contamination; c) the arrangement of passages with respect to their ability t
45、o be flushed and drained; d) the effectiveness of the cleaning agent in removing the contaminants; e) the compatibility of the cleaning agent with the contaminants, metals and material involved; f) the availability and cost of cleaning agents and cleaning methods, the availability of personnel exper
46、ienced in handling these materials; g) the speed and effectiveness of cleaning and the desired level of cleanliness. A list of typical cleaning procedures would include: 1) solvent washing and vapour degreasing; 2) other cleaning methods such as: mechanical cleaning (blast cleaning, wire brushing, e
47、tc.); purging; acid cleaning; alkaline (caustic) washing. A detailed cleaning procedure in accordance with the instructions of the cleaning agent manufacturer should be specified to the satisfaction of both the manufacturer and the user of the oxygen equipment and followed throughout the project. Th
48、e appropriate cleaning and degreasing method shall be determined after due consideration of the limiting values. 3.2.2.2 Solvent washing Solvent washing may be described as the removal of organic contaminants from the surface to be cleaned by the use of suitable solvents or detergent solutions. To i
49、ncrease the efficiency, one may resort to ultrasonic cleaning which may be described as loosening of oil and grease or other contamination from a metal surface by the immersion of parts in a solvent or detergent solution in the presence of high-frequency vibrational energy. Sufficient ventilation shall be provided to ensure that any person involved in solvent washing shall not be exposed to solvent vapours above the national exposure limits for the particular solvent being used. 3.2.2.3 Solvents Some solvents which are permissible are given in Tab