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ASTM D5742-16

(Test Method)

Standard Test Method for Determination of Butane Activity of Activated Carbon

Standard Test Method for Determination of Butane Activity of Activated Carbon

SIGNIFICANCE AND USE
5.1 The butane activity as determined by this test method is a measure of the ability of an activated carbon to adsorb butane from dry air under specified conditions. It is useful for the quality control and evaluation of granular activated carbons. The butane activity is an indication of the micropore volume of the activated carbon sample. This activity number does not necessarily provide an absolute or relative measure of the effectiveness of the tested carbon for other adsorbates or at other conditions of operation.  
5.2 The butane activity test can be used as a non-ozone depleting substitute for the carbon tetrachloride activity test in Test Method D3467. Fig. 1 shows an experimental correlation of activity values obtained using the two adsorbates.  
Note 1: This test has not been designed for use with powdered activated carbon, but it has been used successfully when the flow rate or time are adjusted or the sample volume is decreased to keep the pressure drop at an acceptable value.
SCOPE
1.1 This test method covers determination of the activation level of activated carbon. Butane activity (BA) is defined herein as the ratio (in percent) of the mass of butane adsorbed by an activated carbon sample to the mass of the sample, when the carbon is saturated with butane under the conditions listed in this test method.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For a specific warning statement, see 7.1.

General Information

Status
Historical
Publication Date
31-May-2016
ICS
71.040.30 - Chemical reagents
Technical Committee
D28 - Activated Carbon
Drafting Committee
D28.04 - Gas Phase Evaluation Tests
Current Stage
Ref Project

Relations

Replaces
ASTM D5742-95(2015) - Standard Test Method for Determination of Butane Activity of Activated Carbon
Effective Date
01-Jun-2016
Refers
ASTM D2854-09(2014) - Standard Test Method for Apparent Density of Activated Carbon
Effective Date
01-Jul-2014
Refers
ASTM D3467-04(2014) - Standard Test Method for Carbon Tetrachloride Activity of Activated Carbon
Effective Date
01-Jul-2014
Refers
ASTM E177-14 - Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
Effective Date
01-May-2014
Refers
ASTM E177-13 - Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
Effective Date
01-May-2013
Refers
ASTM E691-13 - Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Effective Date
01-May-2013
Refers
ASTM E691-11 - Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Effective Date
01-Nov-2011
Refers
ASTM D2652-11 - Standard Terminology Relating to Activated Carbon
Effective Date
15-Jun-2011
Refers
ASTM E177-10 - Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
Effective Date
01-Oct-2010
Refers
ASTM D2867-09 - Standard Test Methods for Moisture in Activated Carbon
Effective Date
01-Nov-2009
Refers
ASTM D2854-09 - Standard Test Method for Apparent Density of Activated Carbon
Effective Date
01-Apr-2009
Refers
ASTM D3467-04(2009) - Standard Test Method for Carbon Tetrachloride Activity of Activated Carbon
Effective Date
01-Apr-2009
Refers
ASTM E177-08 - Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
Effective Date
01-Oct-2008
Refers
ASTM E691-08 - Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Effective Date
01-Oct-2008
Refers
ASTM E177-06b - Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
Effective Date
15-Nov-2006

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Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5742 − 16
Standard Test Method for
1
Determination of Butane Activity of Activated Carbon
This standard is issued under the fixed designation D5742; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
3.1 Definitions— For definitions of terms used in this test
1.1 This test method covers determination of the activation
method, refer to Terminology D2652.
level of activated carbon. Butane activity (BA) is defined
herein as the ratio (in percent) of the mass of butane adsorbed
4. Summary of Test Method
byanactivatedcarbonsampletothemassofthesample,when
4.1 An activated carbon bed of known volume and mass is
the carbon is saturated with butane under the conditions listed
saturatedwithbutanevapor.Themassadsorbedatsaturationis
in this test method.
noted and reported as mass of butane per unit mass of carbon.
1.2 The values stated in SI units are to be regarded as
5. Significance and Use
standard. No other units of measurement are included in this
5.1 The butane activity as determined by this test method is
standard.
ameasureoftheabilityofanactivatedcarbontoadsorbbutane
1.3 This standard does not purport to address all of the
from dry air under specified conditions. It is useful for the
safety concerns, if any, associated with its use. It is the
quality control and evaluation of granular activated carbons.
responsibility of the user of this standard to establish appro-
Thebutaneactivityisanindicationofthemicroporevolumeof
priate safety and health practices and determine the applica-
the activated carbon sample. This activity number does not
bility of regulatory limitations prior to use. For a specific
necessarily provide an absolute or relative measure of the
warning statement, see 7.1. effectiveness of the tested carbon for other adsorbates or at
other conditions of operation.
2. Referenced Documents
5.2 The butane activity test can be used as a non-ozone
2
depleting substitute for the carbon tetrachloride activity test in
2.1 ASTM Standards:
Test Method D3467. Fig. 1 shows an experimental correlation
D2652Terminology Relating to Activated Carbon
of activity values obtained using the two adsorbates.
D2854Test Method for Apparent Density of Activated
Carbon NOTE 1—This test has not been designed for use with powdered
activated carbon, but it has been used successfully when the flow rate or
D2867Test Methods for Moisture in Activated Carbon
time are adjusted or the sample volume is decreased to keep the pressure
D3195Practice for Rotameter Calibration
drop at an acceptable value.
D3467Test Method for Carbon Tetrachloride Activity of
6. Apparatus
Activated Carbon
E177Practice for Use of the Terms Precision and Bias in
6.1 Water Bath, capable of maintaining a temperature of 25
ASTM Test Methods
60.2°Candofsufficientdepthsothattheentirecarbonbedin
E300Practice for Sampling Industrial Chemicals
the sample tube is immersed in the water.
E691Practice for Conducting an Interlaboratory Study to
6.2 Sample Tube, with the options shown in Fig. 2.
Determine the Precision of a Test Method
6.3 Flowmeter, capable of delivering butane at 0 to 500
mL/min, calibrated in accordance with Practice D3195.
6.4 Balance, capable of weighing to within 60.01 g.
1
This test method is under the jurisdiction of ASTM Committee D28 on
Activated Carbon and is the direct responsibility of Subcommittee D28.04 on Gas
6.5 Fill Device—The vibration feed device used in Test
Phase Evaluation Tests.
Method D2854.
CurrenteditionapprovedJune1,2016.PublishedJuly2016.Originallyapproved
in 1995. Last previous edition approved in 2015 as D5742–95 (2015). DOI:
6.6 Apparatus Assembly, shown in Fig. 3.
10.1520/D5742-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7. Reagents
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.1 n-Butane, C. P. Grade. (Warning—Butane is a flam-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. mable gas with a flash point of −138°C and a boiling point of
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5742 − 16
FIG. 1 Butane Versus Carbon Tetrachloride Correlation
0.5°C. Its specific gravity is 2.046 relative to air. Butane may 10.2 DeterminetheapparentdensityinaccordancewithTest
be narcotic in high concentrations and i
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5742 − 95 (Reapproved 2015) D5742 − 16
Standard Test Method for
1
Determination of Butane Activity of Activated Carbon
This standard is issued under the fixed designation D5742; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers determination of the activation level of activated carbon. Butane activity (BA) is defined herein as
the ratio (in percent) of the mass of butane adsorbed by an activated carbon sample to the mass of the sample, when the carbon
is saturated with butane under the conditions listed in this test method.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use. For a specific warning statement, see 7.1.
2. Referenced Documents
2
2.1 ASTM Standards:
D2652 Terminology Relating to Activated Carbon
D2854 Test Method for Apparent Density of Activated Carbon
D2867 Test Methods for Moisture in Activated Carbon
D3195 Practice for Rotameter Calibration
D3467 Test Method for Carbon Tetrachloride Activity of Activated Carbon
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E300 Practice for Sampling Industrial Chemicals
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions— For definitions of terms used in this test method, refer to Terminology D2652.
4. Summary of Test Method
4.1 An activated carbon bed of known volume and mass is saturated with butane vapor. The mass adsorbed at saturation is noted
and reported as mass of butane per unit mass of carbon.
5. Significance and Use
5.1 The butane activity as determined by this test method is a measure of the ability of an activated carbon to adsorb butane
from dry air under specified conditions. It is useful for the quality control and evaluation of granular activated carbons. The butane
activity is an indication of the micropore volume of the activated carbon sample. This activity number does not necessarily provide
an absolute or relative measure of the effectiveness of the tested carbon for other adsorbates or at other conditions of operation.
5.2 The butane activity test can be used as a non-ozone depleting substitute for the carbon tetrachloride activity test in Test
Method D3467. Fig. 1 shows an experimental correlation of activity values obtained using the two adsorbates.
NOTE 1—This test has not been designed for use with powdered activated carbon, but it has been used successfully when the flow rate or time are
adjusted or the sample volume is decreased to keep the pressure drop at an acceptable value.
1
This test method is under the jurisdiction of ASTM Committee D28 on Activated Carbon and is the direct responsibility of Subcommittee D28.04 on Gas Phase
Evaluation Tests.
Current edition approved Oct. 1, 2015June 1, 2016. Published October 2015July 2016. Originally approved in 1995. Last previous edition approved in 20102015 as
D5742 – 95 (2010).(2015). DOI: 10.1520/D5742-95R15.10.1520/D5742-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5742 − 16
FIG. 1 Butane Versus Carbon Tetrachloride Correlation
6. Apparatus
6.1 Water Bath, capable of maintaining a temperature of 25 6 0.2°C and of sufficient depth so that the entire carbon bed in the
sample tube is immersed in the water.
6.2 Sample Tube, with the options shown in Fig. 2.
6.3 Flowmeter, capable of delivering butane at 0 to 500 mL/min, calibrated in accordance with Practice D3195.
6.4 Balance, capable of weighing to within 60.01 g.
6.5 Fill Device—The vibration feed device used in Test Method D2854.
6.6 Apparatus Assembly, shown in Fig. 3.
7. Re
...

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ASTM D8176-18(2023)(Test Method)
Standard Test Method for Mechanically Tapped Density of Activated Carbon (Powdered and Fine Mesh)

SIGNIFICANCE AND USE
5.1 This test method is used to determine the density expressed in g/mL for powdered or fine mesh carbon. Due to the nature of the small particles, the density of these carbon types cannot be measured using the same procedure as granular carbon.
SCOPE
1.1 This test method covers the determination of the mechanically tapped density of powdered and fine mesh activated carbon. For the purpose of this test method, “powdered carbon” is defined as having a mean particle diameter less than 45 µm, and “fine mesh carbon” is defined as having a particle size predominately between 80 and 325 U.S. Standard mesh.  
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ASTM D2867-23(Test Method)
Standard Test Methods for Moisture in Activated Carbon

SIGNIFICANCE AND USE
4.1 The moisture content of activated carbon is often required to define and express its properties in relation to the net weight of the carbon.  
4.2 The moisture content of activated carbon packed in typical shipping containers will usually increase during transportation and storage. Users of activated carbon in applications where low moisture content is important should be aware of this effect.
SCOPE
1.1 These test methods provide three procedures for the determination of the moisture content of activated carbon. The procedures may also be used to dry samples required for other tests. The oven drying and moisture balance methods are used when water is the only volatile material present and is in significant quantities, and the activated carbon is not heat sensitive (some activated carbons can ignite spontaneously at temperatures as low as 150 °C). The xylene extraction method is used when a carbon is known or suspected to be heat sensitive or to contain miscible organic compounds instead of or in addition to water. The interferences posed by miscible inorganic compounds has not been determined. The oven drying method described in these test methods may be used as the reference for development of instrumental techniques for moisture determination in activated carbon.  
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ASTM D5158-23(Test Method)
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SIGNIFICANCE AND USE
5.1 The particle size of fine mesh and powdered activated carbon is sometimes used to evaluate filter cake filtration rates and the filter penetration in filtering applications.  
5.2 The selection and handling of fine mesh or powdered activated carbon, and operation of processes using fine mesh or powdered activated carbon, requires the knowledge of the particle size.  
5.3 This test method is intended for single sieve testing only. For determination of particle size distribution of a sample, the test must be repeated using sieves with different openings.
Note 1: Relative humidity (RH) can affect the repeatability and accuracy of this test. Activated carbon not at equilibrium with the RH of the ambient air may lose or gain weight accordingly, dependent upon whether the carbon picks up or loses moisture.
SCOPE
1.1 This test method covers the determination of the particle size of powdered activated carbons using an air-jet sieve device. For purposes of this test method, powdered activated carbon is defined as activated carbon in particle sizes predominantly in a range of 80 mesh (0.180 mm) through 500 mesh (0.025 mm).  
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SIGNIFICANCE AND USE
5.1 This method compares the performance of granular or pelletized activated carbons used in odor control applications, such as sewage treatment plants, pump stations, etc. The method determines the relative breakthrough performance of activated carbon for removing hydrogen sulfide from a humidified gas stream. Other organic contaminants present in field operations may affect the H2S breakthrough capacity of the carbon; these are not addressed by this test. This test does not simulate actual conditions encountered in an odor control application, and is therefore meant only to compare the hydrogen sulfide breakthrough capacities of different carbons under the conditions of the laboratory test.  
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SCOPE
1.1 This test method is intended to evaluate the performance of virgin, newly impregnated or in-service, granular or pelletized activated carbon for the removal of hydrogen sulfide from an air stream, under the laboratory test conditions described herein. A humidified air stream containing 1 % (by volume) hydrogen sulfide is passed through a carbon bed until 50 ppm breakthrough of H2S is observed. The H2S adsorption capacity of the carbon per unit volume at 99.5 % removal efficiency (g H2S/cm3 carbon) is then calculated. This test is not necessarily applicable to non-carbon adsorptive materials.  
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ASTM D3803-91(2022)(Test Method)
Standard Test Method for Nuclear-Grade Activated Carbon

SIGNIFICANCE AND USE
5.1 The results of this test method give a conservative estimate of the performance of nuclear-grade activated carbon used in all nuclear power plant HVAC systems for the removal of radioiodine.
SCOPE
1.1 This test method is a very stringent procedure for establishing the capability of new and used activated carbon to remove radio-labeled methyl iodide from air and gas streams. The single test method described is for application to both new and used carbons, and should give test results comparable to those obtained from similar tests required and performed throughout the world. The conditions employed were selected to approximate operating or accident conditions of a nuclear reactor which would severely reduce the performance of activated carbons. Increasing the temperature at which this test is performed generally increases the removal efficiency of the carbon by increasing the rate of chemical and physical absorption and isotopic exchange, that is, increasing the kinetics of the radioiodine removal mechanisms. Decreasing the relative humidity of the test generally increases the efficiency of methyl iodide removal by activated carbon. The water vapor competes with the methyl iodide for adsorption sites on the carbon, and as the amount of water vapor decreases with lower specified relative humidities, the easier it is for the methyl iodide to be adsorbed. Therefore, this test method is a very stringent test of nuclear-grade activated carbon because of the low temperature and high relative humidity specified. This test method is recommended for the qualification of new carbons and the quantification of the degradation of used carbons.  
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ASTM D5159-21(Guide)
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4.1 Three forces can mechanically degrade a granular activated carbon: impact, crushing, and attrition. Of these three, attrition, or abrasion, is the most common cause of dust formation in actual service. Published test procedures to determine the “hardness” of activated carbons produce results that in general cannot be correlated with field experience. For example, the ball-pan hardness test applies all three forces to the sample in a variable manner determined by the size, shape, and density of the particles. The “stirring bar” abrasion test measures attrition so long as the particle size is smaller than 12 mesh. There is some evidence, however, that the results of this test method are influenced by particle geometry. The procedure set forth in this guide measures the effect of friction forces between vibrating or slowly moving particles during the test and may be only slightly dependent on particle size, shape, and density effects.
SCOPE
1.1 This guide presents a procedure for evaluating the resistance to dusting attrition of granular activated carbons. For the purpose of this guide, the dust attrition coefficient, DA, is defined as the weight (or calculated volume) of dust per unit time, collected on a preweighed filter, in a given vibrating device during a designated time per unit weight of carbon. The initial dust content of the sample may also be determined. Granular activated carbon is defined as a minimum of 90 % being larger than 80 mesh (0.18 mm) (see Test Methods D2867).  
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ASTM D6586-03(2021)(Practice)
Standard Practice for the Prediction of Contaminant Adsorption on GAC in Aqueous Systems Using Rapid Small-Scale Column Tests

SIGNIFICANCE AND USE
5.1 Granular activated carbon (GAC) is commonly used to remove contaminants from water. However if not used properly, GAC can not only be expensive but can at times be ineffective. The development of engineering data for the design of full-scale adsorbers often requires time-consuming and expensive pilot plant studies. This rapid standard practice has been developed to predict adsorption in large-scale adsorbers based upon results from small column testing. In contrast to pilot plant studies, the small-scale column test presented in this practice does not allow for a running evaluation of factors that may affect GAC performance over time. Such factors may include, for example, an increased removal of target compounds by bacterial colonizing GAC3 or long-term fouling of GAC caused by inorganic compounds or background organic matter.4 Nevertheless, this practice offers more relevant operational data than isotherm testing without the principal drawbacks of pilot plant studies, namely time and expense; and unlike pilot plant studies, small-scale studies can be performed in a laboratory using water sampled from a remote location.  
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SCOPE
1.1 This practice covers a test method for the evaluation of granular activated carbon (GAC) for the adsorption of soluble pollutants from water. This practice can be used to estimate the operating capacities of virgin and reactivated granular activated carbons. The results obtained from the small-scale column testing can be used to predict the adsorption of target compounds on GAC in a large column or full-scale adsorber application.  
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ASTM D4069-95(2020)(Specification)
Standard Specification for Impregnated Activated Carbon Used to Remove Gaseous Radio-Iodines from Gas Streams

ABSTRACT
This standard covers the specifications for physical properties and performance requirements of virgin impregnated activated carbon to be used for the removal of gaseous radioiodine species from gas streams. The activated carbon furnished under this specification shall be virgin material. Each batch of impregnated activated carbon shall conform to the requirements for physical properties prescribed. The following test methods shall used to determine the physical properties and performance capability of the sample: apparent density; particle size distribution; ash content; moisture content; ignition temperature; ball-pan hardness; and pH.
SIGNIFICANCE AND USE
5.1 Activated carbons used in containment systems for nuclear reactors must be capable of functioning under both normal operating conditions and those conditions which may exist following a design basis accident (DBA). Adsorbent beds that are part of recirculatory systems inside containment may be exposed to the peak pressure, temperature, and steam content of a post-DBA condition.  
5.2 Carbon beds outside containment will be protected by fast-acting shutoff valves from the sudden rise in pressure, temperature, and humidity of the containment atmosphere which would exist following a DBA. However, some rise in temperature and humidity will be experienced even by beds outside containment if they are reconnected to containment after the initial pressure rise (due to escape of steam into the containment volume) has been reduced by containment coolers. The amount of radioactivity that can reach either type of adsorption system is conceivably quite high; hence, there is a possibility of a bed temperature rise due to decay heating. The gaseous radioactive contaminants of most interest are organic iodides. In this test, CH3I is used to typify the performance of the carbon on organic iodine compounds in general. The test described here provide a reasonable picture of the effectiveness of an activated carbon for organic iodides under normal and post-DBA conditions. The equipment and methods described can be used, with discretion, for similar tests at different gas flow conditions and, to some extent, on different gaseous radioactive contaminants and other adsorbents.
SCOPE
1.1 This standard covers the specifications for physical properties and performance requirements of virgin impregnated activated carbon to be used for the removal of gaseous radioiodine species from gas streams.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM D5029-98(2020)(Test Method)
Standard Test Method for Water Solubles in Activated Carbon

SIGNIFICANCE AND USE
5.1 In certain applications, the ash, color, conductivity, or pH of the finished activated carbon product may be influenced by the quantity of water solubles it contains. This water solubles test provides a relative indication of the quantity of soluble materials that may be extracted from various activated carbons.
SCOPE
1.1 This test method covers the determination of the water-soluble content of (unused) granular and powdered activated carbons. Water solubles are materials that can be extracted by distilled water under reflux conditions and are expressed as a percentage of dry carbon weight.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM D6851-20(Test Method)
Standard Test Method for Determination of Contact pH with Activated Carbon

SIGNIFICANCE AND USE
4.1 The determination of contact pH can be used as a simple and fast measurement that can allow activated carbon producers and users to have a standard method for assessing the effect various carbons will have on the initial pH of the water in contact with the carbon. It has been determined that there is a bias between this method and Test Method D3838; they are not equivalent.
SCOPE
1.1 This method is to be used in the determination of the pH of water on initial contact with activated carbon. This test method is not meant as a replacement for Test Method D3838 and may give a different value.  
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Standard
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  • Standard
    3 pages
    English language
    sale 15% off