ASTM F307-73(1995)e1
(Practice)Standard Practice for Sampling Pressurized Gas for Gas Analysis
Standard Practice for Sampling Pressurized Gas for Gas Analysis
SCOPE
1.1 This practice describes the procedure for obtaining a sample of pressurized gas for gas analysis from a system or component.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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 hazard statement, see Section 5.
General Information
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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e1
Designation: F 307 – 73 (Reapproved 1995) An American National Standard
Standard Practice for
Sampling Pressurized Gas for Gas Analysis
This standard is issued under the fixed designation F 307; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
e NOTE—Section 7 was added editorially in June 1995.
1. Scope
1.1 This practice describes the procedure for obtaining a
sample of pressurized gas for gas analysis from a system or
component.
FIG. 1 Gas Sample Vessel.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
4.2 Miscellaneous Fittings, as needed for sampling point
only.
adaption.
1.3 This standard does not purport to address all of the
4.3 Tie-downs, suitable for sample line restraint in accord-
safety concerns, if any, associated with its use. It is the
with pressure, temperature, and recognized safety codes.
responsibility of the user of this standard to establish appro-
4.4 Gas Sample Vessel, evacuated to a suitable pressure for
priate safety and health practices and determine the applica-
the gas analysis method to be used. This vessel should have
bility of regulatory limitations prior to use. For hazard state-
valves at inlet and outlet to enable lockup of vacuum or
ment, see Section 5. Fig. 1
pressure.
2. Terminology
NOTE 2—The gas sample vessel capacity is in accord with desired
sample volume. A recommended 500-in (8-L) volume has been deter-
2.1 Definitions:
mined adequate to aerospace industry. The gas sample vessel must be
2.1.1 sample port—the designated point in a system or
pressure-rated for the system or component to be sampled.
component from which a representative gas sample may be
taken.
5. Safety Hazards
5.1 Personnel must stand clear of exiting gas.
3. Summary of Practice
5.2 Ear protection must be used when gas flow approaches
3.1 A sample vessel is evacuated and sealed with a mini-
sonic velocity.
mum vacuum pressure. The vessel is then attached to the
5.3 All lines and associated equipments must be connected
designated pressurized sample port. The pressurized gas is
and operated within the requirements of recognized safety
allowed to enter the sample vessel until the pressure is equal to
codes.
the pressure of the system or component. The pressure is
secured and the sample vessel assigned for appropriate analy-
6. Procedure
sis.
6.1 Establish and maintain a minimum purge at the sample
port.
4. Apparatus
6.2 Connect one end of a suitable connecting line to the
NOTE 1—All apparatus used in the sample taking should be verified as
sample port, and continue to purge.
cleaned and packaged w
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