MODUK-DEF-M-8004-91.pdf
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1、c I STD.MODUK fl OO4/SL-ENGL 1971 Lb24241 O345993 293 This method has been devised for the use of the Crown and of its contractors in the execution of contracts for the Crown. The Crown hereby excludes all liability (other than liability for death or personal injury) whatsoever and howsoever arising
2、 (including, but without limitation, negligence on the part of the Crown its servants or agents) for any loss or damage however caused where the method is used for any other purpose. Any question that may arise relative to this method should be referred to the Directorate of Quality AssuranceITechnk
3、al Support. c DIRECTORATE OF QUALITY ASSURANCE/TECHNICAL SUPPORT Laboratory Test Method M8004/91 22 October 1991 EXAMINATION OF COMPRESSED BREATHING AIR I DQA/TS Standardization Section, Royal Arsenal East, LONDON SE18 6TD CROWN COPYRIGHT RESERVED D/DQA/TS/EXPL/(Sw/7/28004 ExpllBndgwater STD-MODUK f
4、l BOO4/7L-ENGL 1771 LbZLi2111 0395799 12T = M8 O O 4/9 1 . CONTENTS PAGE 1 2 3 4 5 6 7 8 9 10 11 12 Scope WARNING Precautions Related Documents List of Tests Sampl i ng Disposal of Waste Examination for OdOW Determination of Trace Contaminants Determination of Oxygen Purity Determination of Moisture
5、 Determination of Particulates Annex A Analytical Results 3 3 3 3 4 4 4 4 5 6 6 6 A-l EXAMINATION OF COMPRESSED BREATHING AIR M8 O O 4/91 1 scope This method relates to test procedures for the analysis of gaseous compressed air for use in breathing apparatus. 2 FWWING This method calls for the use o
6、f substances and test procedures that may be injurious to health if adequate precautions are not taken. technical suitability and in no way absolves the user from statutory and any other legal obligations relating to health and safety. It refers only to 3 Precautions 3 . 1 under adequate technical s
7、upervision. common chemical laboratory hazards has not been included. 3 . 2 the current safety regulations for the laboratory where the work is to be carried out. disposal of compressed gases. 3.3 taken when using this method should be referred to the laboratory supervisor. It is assumed that this m
8、ethod will be carried out by competent staff For this reason a complete list of Before commencing work on the method the operator must be familiar with Particular attention should be given to the handling, storage and Any doubts concerning the existence of hazards or the precautions to be 4 Related
9、Documents 4.1 Specifications to which this method pertains: Def Stan 16-8 Def Stan 68-75 Compressed Breathing Air for Aircraft Systems Breathing Gas Purity for Diving 4.2 Other documents relevant to this method: BS 4001 ES 4275 Recommendation for the Selection, Use and Maintenance Laboratory Method
10、M8011 Care and Maintenance of Underwater Breathing Apparatus of Respiratory Protective Equipment Determination of particulates in Compressed Gases 4.3 edition unless a specific edition is indicated. Reference in this method to any related document means the current 3 -,-,- 4.4 Copies of the related
11、documents may be obtained from: British Standards Defence Standards Laboratory Method I SOURCE I- l British Standards Institution Sales Department Linford Wood MILTON KEYNES MK14 6LE Directorate of Standardization Kentigern House 65 George Street GLASGW G2 8 M MOD Library Building E28 Royal Arsenal
12、East, LONDON SE18 6TD 5 List of Tests Determination of Trace Contaminants Determination of Oxygen Content Determination of Moisture Determination of Particulates 6 Sampl in9 Collect the gas sample in an evacuated cylinder. Connect the sampling line to the compressor and purge the line for five minut
13、es. clause 9 clause 10 clause 11 clause 12 Using an in-line on/off valve to stop the gas flow, connect the line to the evacuated cylinder. with the gas leaking copiously through the connection on the cylinder. approximately half a minute tighten the fitting and open the cylinder valve slowly to allo
14、w the cylinder to be filled to the required pressure. NOTE: the temperature of the cylinder is not increasing too quickly by placing a hand on the outside. filling procedure. loosely After Turn on the gas flow and allow the line to purge When filling the sample cylinder to the required pressure, che
15、ck that If warm, allow to cool before continuing with the 7 Disposal of waste After completion of analysis ensure that the waste gases from the sample cell are vented outside to the atmosphere. a Examination for dour Examine the compressed air as received for the presence of any odour. regulated str
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