ASTM E144-14
(Practice)Standard Practice for Safe Use of Oxygen Combustion Vessels
Standard Practice for Safe Use of Oxygen Combustion Vessels
ABSTRACT
This practice covers methods for judging the soundness of new and used oxygen combustion bombs, and describes the precautions to be observed in oxygen bomb combustion methods. This practice is applicable to all procedures in which samples are completely oxidized by combustion in a metal bomb containing oxygen under pressure. Hydrostatic test and proof test shall be performed. The following precautions shall be observed in all oxygen bomb combustion methods: sample weight; oxygen filling system; ignition system; and safety barricade.
SCOPE
1.1 This practice covers methods for judging the soundness of new and used oxygen combustion vessels, and describes the precautions to be observed in oxygen combustion vessel methods.
1.2 This practice is applicable to all procedures in which samples are completely oxidized by combustion in a metal vessel containing oxygen under pressure. Where there is conflict with specific precautions in individual ASTM methods, the latter shall take precedence.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 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.
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Designation: E144 − 14
Standard Practice for
1
Safe Use of Oxygen Combustion Vessels
This standard is issued under the fixed designation E144; 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* 2.2.3 Ignition of any internal part of the vessel, including
fuel capsule.
1.1 This practice covers methods for judging the soundness
2.2.4 The evidence of corrosion or surface defects which
of new and used oxygen combustion vessels, and describes the
exceed 80 % of the manufacturer’s stated corrosion allowance
precautions to be observed in oxygen combustion vessel
for the vessel.
methods.
2.2.5 Any change in thread tolerances of vessel enclosures
1.2 This practice is applicable to all procedures in which
which exceed the manufacturer’s specifications.
samples are completely oxidized by combustion in a metal
vessel containing oxygen under pressure. Where there is
3. Hydrostatic Test
conflict with specific precautions in individualASTMmethods,
3.1 Fill the vessel with water at room temperature and
the latter shall take precedence.
connect to a suitable hydraulic pressure system. Be sure that all
1.3 The values stated in inch-pound units are to be regarded
air has been displaced from the vessel and from the connecting
as standard. The values given in parentheses are mathematical
gas passages. Support the vessel so that the diameter at the
conversions to SI units that are provided for information only
midsection of the cylinder can be measured with a micrometer
and are not considered standard.
caliper, and the deflection at the center point of the bottom can
1.4 This standard does not purport to address all of the
be measured with a micrometer dial indicator. Apply water
safety concerns, if any, associated with its use. It is the
pressure which is 1.5 times the manufacturer’s recommended
responsibility of the user of this standard to establish appro-
working pressure test pressure of the vessel and check the
priate safety and health practices and determine the applica-
vessel and pressure connections for leaks.
bility of regulatory limitations prior to use.
3.2 With the hydraulic system at atmospheric pressure,
measure the diameter at the midsection of the cylinder and
2. Physical Requirements
obtain a zero reading for the dial indicator in contact with the
2.1 Initial Test—The manufacturer of oxygen combustion
center point of the bottom of the vessel. Raise the hydrostatic
vessels for use inASTM test methods shall furnish a certificate
pressure to test pressure and repeat these measurements, then
with each new vessel showing that it has satisfactorily passed
release the pressure and take a third set of measurements with
the hydrostatic and proof tests described in Sections 3 and 4.
the system at atmospheric pressure. If the application of test
When requested, the manufacturer shall supply evidence that
pressure produces a deflection greater than 0.005 in.
the vessel is designed and constructed in accordance with
(0.127 mm) at the midsection of the cylinder or at the center
recognized practices for pressure vessel equipment.
point of the bottom of the vessel, or if any of the vessel parts
2.2 Periodic Inspection—All seals and other parts that are
do not resume their original dimensions when pressure is
recommended by the manufacturer shall be replaced or re-
released, reject the vessel as unsafe.
newed after each 5000 firing or at a more frequent interval if
the seals or other parts show evidence of deterioration. The
4. Proof Test
hydrostatic and proof tests described in Sections 3 and 4 shall
4.1 Record the outside diameter at the midsection of the
be repeated if any of the following have occurred:
vessel cylinder as measured with a micrometer caliper, then
2.2.1 Five thousand firings.
assemble the vessel for firing with a tablet or pellet of
2.2.2 Firing with an excessive charge of either sample or
compressed benzoic acid that gives an energy release that is 1.5
oxygen.
times the manufacturer’s recommended energy release limit.
Admit oxygen slowly to an initial pressure that represents the
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This practice is under the jurisdiction ofASTM Committee E41 on Laboratory
manufacturer’s maximum charging pressure, then submerge
Apparatus and is the direct responsibility of Subcommittee E41.01 on Apparatus.
the vessel in water and check for gas leaks. If none appear,
Current edition approved Dec. 1, 2014. Published January 2015. Originally
arrange the vessel for firing in a water bath protected by a
approved in 1959. Last previous edition approved in 2011 as E144 – 94 (2011).
DOI: 10.1520/E0144-14. heavy barricade. (War
...
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: E144 − 94 (Reapproved 2011) E144 − 14
Standard Practice for
1
Safe Use of Oxygen Combustion BombsVessels
This standard is issued under the fixed designation E144; 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
ε NOTE—The warning note was editorially moved into 4.1 in December 2006.
1. Scope Scope*
1.1 This practice covers methods for judging the soundness of new and used oxygen combustion bombs,vessels, and describes
the precautions to be observed in oxygen bomb combustion vessel methods.
1.2 This practice is applicable to all procedures in which samples are completely oxidized by combustion in a metal bombvessel
containing oxygen under pressure. Where there is conflict with specific precautions in individual ASTM methods, the latter shall
take precedence.
1.3 The values stated in inch-pound units are to be regarded as the standard. The metric equivalent of inch-pound units may be
approximate.standard. The values given in parentheses are mathematical conversions to SI units that are provided for information
only and are not considered standard.
1.4 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.
2. Physical Requirements
2.1 Initial Test—The manufacturer of oxygen combustion bombsvessels for use in ASTM test methods shall furnish a certificate
with each new bombvessel showing that it has satisfactorily passed the hydrostatic and proof tests described in Sections 3 and 4.
When requested, the manufacturer shall supply evidence that the bombvessel is designed and constructed in accordance with
recognized practices for pressure vessel equipment.
2.2 Periodic Inspection—All seals and other parts that are recommended by the manufacturer shall be replaced or renewed after
each 5000 firing or at a more frequent interval if the seals or other parts show evidence of deterioration. The hydrostatic and proof
tests described in Sections 3 and 4 shall be repeated if any of the following have occurred:
2.2.1 Five thousand firings.
2.2.2 Firing with an excessive charge of either sample or oxygen.
2.2.3 Ignition of any internal part of the bomb,vessel, including fuel capsule.
2.2.4 The evidence of corrosion or surface defects which exceed 80 % of the manufacturer’s stated corrosion allowance for the
bomb.vessel.
2.2.5 Any change in thread tolerances of bombvessel enclosures which exceed the manufacturer’s specifications.
3. Hydrostatic Test
3.1 Fill the bombvessel with water at room temperature and connect to a suitable hydraulic pressure system. Be sure that all
air has been displaced from the bombvessel and from the connecting gas passages. Support the bombvessel so that the diameter
at the midsection of the cylinder can be measured with a micrometer caliper, and the deflection at the center point of the bottom
can be measured with a micrometer dial indicator. Apply water pressure which is 1.5 times the manufacturer’s recommended
working pressure test pressure of the bombvessel and check the bombvessel and pressure connections for leaks.
3.2 With the hydraulic system at atmospheric pressure, measure the diameter at the midsection of the cylinder and obtain a zero
reading for the dial indicator in contact with the center point of the bottom of the bomb.vessel. Raise the hydrostatic pressure to
test pressure and repeat these measurements, then release the pressure and take a third set of measurements with the system at
1
This practice is under the jurisidictionjurisdiction of ASTM Committee E41 on Laboratory Apparatus and is the direct responsibility of Subcommittee E41.06E41.01 on
Weighing DevicesApparatus.
Current edition approved Dec. 1, 2011Dec. 1, 2014. Published December 2011January 2015. Originally approved in 1959. Last previous edition approved in 20062011
e
as E144 – 94 (2006)(2011). 1. DOI: 10.1520/E0144-94R11.10.1520/E0144-14.
*A Summary of Changes section appears at the end of this standard
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E144 − 14
atmospheric pressu
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