《JIS-K-0804-1998-R2003-ENG.pdf》由会员分享，可在线阅读，更多相关《JIS-K-0804-1998-R2003-ENG.pdf（26页珍藏版）》请在三一文库上搜索。
1、J IS JAPANESE I NDUSTRIAL STANDARD Translated and Published by Japanese Standards Association Gas detector tube measurement system (Length-of -Sta n type) ICs 71.040.40 Descriptors : gases, gas detectors, measuring instruments, pipes Reference number : JIS K 0804 : 1998 (E) PROTECTED BY COPYRIGHT 14
2、 S K 0804 : 1998 Foreword This translation has been made based on the original Japanese Industrial Standard revised by the Minister of International Trade and Industry through deliberations at the Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law. Conseque
3、ntly JIS K 0804 : 1992 is replaced with JIS K 0804 : 1998. This revision has been made so as to be able to propose easily the draft of International Standard by considering the improvement of function and performance of machinery with the recent technical progress and the change of surroundings in u
4、se, in accordance with JIS Z 8301 : 1996 which has been newly revised for conforming to the corresponding International Standard. Date of Establishment: 1985-03-01 Date of Revision: 1998-04-20 Date of Public Notice in Official Gazette: 1998-04-20 Investigated by: Japanese Industrial Standards Commit
5、tee Divisional Council on Environment JIS K 0804 : 1998, First English edition published in 2002-08 Translated and published by: Japanese Standards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JE is to be the final
6、authority. O JSA 2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan PROTECTED B
7、Y COPYRIGHT K 0804 : 1998 Contents 1 2 3 4 4.1 4.2 Page Scope 1 Normative references 1 Definitions 1 Classification 1 1 3 Class of gas-sampling containers . Class of detecting tubes . 4.2.1 Classification according to reading system . 3 4.2.2 Class according to measuring objective gas 4 5 Quality an
8、d performance . 4 5.1 Quality and performance of gas sampling container 4 5.2 Quality and performance of detecting tube 5 6 Construction . 6 6.1 Gas sampling container 6 6.2 Detecting tube 6 7 Test method 6 7.1 Sampling method . 6 7.2 Standard conditions for test place . 6 7.3 Appearance . 6 7.4 Per
9、formance 7 7.4.1 Gas sampling container 7 7.4.2 Detecting tube 8 8 Marking . 9 8.1 Marking on gas sampling container . 9 8.2 Marking on direct reading system detecting tube, concentration table of concentration table system detecting tube and storage case for detecting tube 9 PROTECTED BY COPYFiIGHT
10、 K 0804 : 1998 9 Cautions on operation . Related standards . Attached Table i Normative references . Attached Table 2 Example of measuring objective gas and standard gas for testing. and approximate concentration range to be measured Annex (normative) Testing gas 1 2 3 3.1 3.2 Scope Testing gas when
11、 specified in JIS Testing gas when not specified in JIS The case where high purity matter or gas with known concentration is obtained . The case where high purity matter or gas with known concentration is not obtained . 10 11 12 14 19 19 19 19 19 21 (ii) PROTECTED BY COPYRIGHT JAPANESE INDUSTRIAL ST
12、ANDARD JIS K 0804 : 1998 Gas detector tube measurement system (Length-of-stain type) 1 detector tubes (hereafter referred to as “detector tube”) for short time. Scope This Japanese Industrial Standard specifies the length-of-stain type gas 2 Normative references The standards indicated in Attached T
13、able 1 contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions of the standards (including amendments) shall be applied. 3 Definitions For the main terms used in this Standard, the definitions shall be as follows. gas detector tu
14、be It is a gas detector composed of a detecting tube and a gas sampling container for detector tube (hereafter referred to as “gas sampling con- tainer”). length-of-stain type detecting tube It is a detecting tube filled with the reagent which reacts promptly with the component to be measured in sam
15、ple gas and forms the boundary to distinguish clearly a reaction portion and an unreaction portion. detecting tube for short time It is a detecting tube for the purpose of mea- suring the concentration within ten-odd min. pre-treatment tube It is a tube filled with the pre-treatment agent for sample
16、 gas such as dehumidifying agent or decomposition reaction agent, etc. and used by connecting to detecting tube. internal volume of gas sampling container sucked by one time of ventilation operation. air-tightness of gas sampling container It is the air leakage when the inside of gas sampling contai
17、ner is pressurized or decompressed and left as it is. ventilation time It is the time required for one time of ventilation operation. It is the volume of sample gas Classification 4.1 be as shown in Table 1. Class of gas-sampling containers The class of gas-sampling containers shall PROTECTED BY COP
18、YRIGHT -,-,- 2 K 0804 : 1998 Class Cylinder type Vacuum system Gas sampling system Remarks A system wherein the inside of the cylinder of a gas sampling container to which a detecting tube is connected, decompressed with a piston to suck Fig. 1 sample gas through the detecting tube. A system wherein
19、 after once sampling sample gas into the inside of the cylinder of a gas sampling container, the sample gas is discharged through a detecting tube with a piston. A system wherein bellows are compressed and the inside is made to a decompressed state by the stress of inner spring or the like, and samp
20、le gas is sucked through a detecting tube. - ,/j-checkvcyiier Guide mark Cutter for tip of detecting tube stopper A Fig. 2 Fig. 3 Detecting tube fitting opening I Packing Piston i ShaB Fig. 1 Example of vacuum system gas sampling container Detecting tube i-, Piston Gas sampling opening Fig. 2 Exampl
21、e of feed system gas sampling container PROTECTED BY COPYRIGHT -,-,- 3 K 0804 : 1998 A system wherein the graduation for concentration printed on the surface of a detecting tube is directly read to obtain the concentration of an objective gas. Detecting tube , / fitting opening Fig. 4 Exhaust valve
22、A system wherein the appended table for concentra- tion (l) is compared with the discolored length of a detecting agent to obtain the concentration of an objective gas. - Indicator Spring Fig. 5 i. 6 Bellows Fig. 3 Example of bellows type gas sampling container 4.2 Class of detecting tubes 4.2.1 Cla
23、ssification according to reading system Classification of detecting tubes according to the reading system shall be as given in Table 2. Table 2 Classification of detecting tubes according to reading system I classification I Reading system I Remarks I Direct reading system Concentration table system
24、 Note (1) The table for concentration herein is the table provided with the graduation for concentration in order to correct the discolored length owing to dispersion on the inner diameter of a glass tube. Plug L Detecting agent Plug Fig. 4 Example of direct reading system detecting tube PROTECTED B
25、Y COPYRIGHT 4 K 0804 : 1998 Fig. 5 Example of concentration table system detecting tube L 1500 1200 1 O00 800 600 400 300 200 1 O0 O Fig. 6 Example of concentration table and method to use 4.2.2 Class according to measuring objective gas The class according to a mea- suring objective gas shall be ex
26、pressed by prefixing respectively the name of the mea- suring objective gas in Attached Table 2 to the detecting tube. 5 Quality and performance 5.1 Quality and performance of gas sampling container The quality and per- formance of a gas sampling container shall be as given in Table 3. PROTECTED BY
27、COPYRIGHT 5 K 0804 : 1998 Table 3 Quality and performance of gas sampling container Items Tests Quality and performance Rubber at the detecting tube fitting opening shall be free from crack, deformation, etc. Appearance 7.3 7.4.1 a) Internal volume ness system system Bellows Tolerance to the marked
28、value of 9 a) Leak rate to the value of a measured internal volume -r5% within 3 % 7.4.1 b) 1) Leak rate to the value of a measured internal volume within 3 % 7.4.1 b) 2) Leak rate to the value of a measured internal volume within 3 % 7.4.1 b) 3) Gas flowrate _ _ _ _ An error to the gas flow amount
29、stated clearly in 9 b) for the gas sampling container having a sucking speed-regulation part built-in i 10 % 7.4.1 c) Durability After repeating gas flow operation 100 times, the quality and performance on the internal volume, airtightness, and gas flowrate shall be satisfied. 7.4.1 d) 5.2 of a dete
30、cting tube shall be as given in Table 4. Quality and performance of detecting tube The quality and performance Table 4 Quality and performance of detecting tube Items Quality and performance Tests Appearance 7.3 The appearance shall be free from pinhole, crack, flaw, etc., and the graduation of a di
31、rect reading system detecting tube shall be clear. Precision on indica- tion Error to the gas for testing of at least 113 the graduation range Indication value of detecting tube Mean value of indication values within 25 % within 15 % 7.4.2 a Error to the gas for testing of at most 113 graduation ran
32、ge Indication value of detecting tube Mean value of indication values within 35 % within 25 % Error to the gas for testing measuring 18 % to 21 % in oxygen concentration Indication value of detecting tube Mean value of indication values within 8 % within 5 % within 20 % The value of ALIM as given in
33、 Fig. 9 7.4.2 b Slant of top end face of discoloration The precision on indication shall be satisfied at 10 “C * 2 “C and 30 “C f 2 “C in temperature 7.4.2 cl Influence by temperature The value of Al as given in Fig. 10 within 2 mm 7.4.2 d) Slant of end face of detecting agent on gas inlet side PROT
34、ECTED BY COPYRIGHT 6 K 0804 : 1998 Test item Gas Appearance sampling container Internal volume Airtightness Gas flowrate 6 Construction 100 % test Sampling test O O O O 6.1 Gas sampling container The gas sampling container shall have a function wherein its inside is made to be pressurized or decompr
35、essed and a definite amount of sample gas is flowed into the detecting tube. For the sample gas container hav- ing the regulating function of suction speed, the speed of sample gas flowed into the detecting tube shall be regulated by the orifice and the like attached to the inside of detecting tube
36、fitting opening. Appearance Precision on indication Slant at top end face of discoloration 6.2 The detecting tube and pretreating tube shall be as follows: a definite amount of a detecting agent or a pretreating agent is packed into a trans- parent tube such as a glass tube or the like wherein its i
37、nside diameter is uniform and its total length is equal; a plug or the like is applied so that the detecting agent or a pretreating agent is not loosened; and further both ends of the tube are her- metically sealed. The graduation of a direct reading system detecting tube shall not easily disappear.
38、 Detecting tube O O O 7 Test method Slant at end face of detecting agent on gas inlet side 7.1 Sampling method The sampling method shall be as shown in Table 5. The sampling test in this case shall be carried out according to JIS Z 9001. O Table 5 Sampling method I I 1 Durability I I OI Detecting tu
39、be Influence by temperature I IOI 7.2 Standard conditions for test place The standard conditions for test place shall be in accordance with JIS Z 8703 (20 5 2) “C in temperature, (65 -t 20) % in relative humidity, (86 to 106) kPa in atmospheric pressure. 7.3 Appearance Examine the crack, deformation
40、, etc. of the rubber at the fitting opening of a detecting tube for a gas sampling container and the pinhole, crack, flaw, etc. for a detecting tube visually and by touching by hand. For the direct reading system detecting tube, examine visually the graduation number and the graduation line. PROTECT
41、ED BY COPYRIGHT 7 K 0804 : 1998 - etecting tube r - ilIli v 7.4 Performance Gas container sampling 7.4.1 Gas sampling container The gas sampling container shall be tested on the following items in the atmosphere. a) Internal volume Insert the detecting tube of which both ends are opened into the fit
42、ting opening of the detecting tube of a gas sampling container, connect a soap film flowmeter or a glass injection cylinder with calibrated graduation to the other end of the detecting tube to carry out air flow operation, and measure the internal volume of the gas sampling container. The method usi
43、ng a soap film flowmeter and the method using a glass injection cylinder shall be as fol- lows. i) Method using soap film flowmeter Make a soap film at the zero posi- tion of the marked line of the soap film flowmeter, raise the Film by air flow of flow operation of gas sampling container and obtain
44、 the volume from the stopped position of the film (see Fig. 7). Zero Soap film flowmeter In the case of vacuum system and bellows type In the case of Fig. 7 Method using the soap film flowmeter 2) Method using glass injection cylinder Set the piston of the glass in- jection cylinder with calibrated
45、graduation at the scale position of 1.1 times the internal volume clearly marked according to 9 a) in the cases of a vacuum system and a bellows type, and at the zero position of the glass injection cylinder in the case of a feed system, move the piston by the flow of air of flow operation of gas sa
46、mpling container, and obtain the volume from the stopped position (see Fig. 8). Glass injection Zero position cylinder , Fig. 8 Method using the glass injection cylinder PROTECTED BY COPYRIGHT 8 K 0804 : 1998 Airtightness 1) For a vacuum system sampling container, insert a closed detecting tube into
47、 the fitting opening of the detecting tube of a gas sampling container, seal the sampling container, carry out gas flow operation, remove the stop- per (see Fig. i) of a handle after time clearly marked by 9 a) has elapsed, and obtain the airtightness by the position where the piston has returned. F
48、or a feed system sampling container, close a cylinder by operating a cock, keep it by pulling a handle, loose the handle after the time clearly marked by 9 a) has elapsed, and obtain the airtightness by the position where the piston has returned. For a bellows type sampling container, insert a close
49、d detecting tube into the fitting opening of the detecting tube of a gas sampling container, seal the sampling container, compress completely the bellows and obtain the airtightness from the indication of indicator (see Fig. 3) after the time clearly marked by 9 a) has elapsed. 2) 3) Gas flowrate Connect the soap film flowmeter specified in a) i) or the glass injection cylinder with calibrated graduation specified in a) 2) to the fitting opening of th