ASTM F327-08
(Practice)Standard Practice for Sampling Gas Blow Down Systems and Components for Particulate Contamination by Automatic Particle Monitor Method
Standard Practice for Sampling Gas Blow Down Systems and Components for Particulate Contamination by Automatic Particle Monitor Method
ABSTRACT
This practice describes the apparatus needed, and the procedures for connecting, preparing, and sampling pressurized gas blow down systems and components for particulate contamination by the use an automatic particle monitor. The sensing unit of the automatic particle monitor is connected to the designated sample port which is under purge condition. The system flow rate is then adjusted to the sample flow rate requirement. Finally, all the gas passing through the sensing unit is monitored for particulate contamination until the required sample volume has been analyzed.
SCOPE
1.1 This practice describes how to connect, prepare, and sample pressurized gas systems (having up to 19.1-mm (0.75-in.) diameter lines) for particulate contamination by using an automatic monitor.
1.2 The values stated in MKS 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 statements, see Section 5.
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Designation: F327 − 08
StandardPractice for
Sampling Gas Blow Down Systems and Components for
Particulate Contamination by Automatic Particle Monitor
1
Method
ThisstandardisissuedunderthefixeddesignationF327;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope automatic particle monitor is connected to the designated
sample port which is under purge condition. The system
1.1 This practice describes how to connect, prepare, and
flow-rate is adjusted to the sample flow rate requirement. All
sample pressurized gas systems (having up to 19.1-mm (0.75-
the gas passing through the sensing unit is monitored for
in.) diameter lines) for particulate contamination by using an
particulatecontaminationuntiltherequiredsamplevolumehas
automatic monitor.
been analyzed.
1.2 ThevaluesstatedinMKSunitsaretoberegardedasthe
standard. The values given in parentheses are for information
4. Apparatus
only.
4.1 Automatic Monitor, with sensor that sizes and counts all
1.3 This standard does not purport to address all of the
entering fluid in accordance with the users requirements for
safety concerns, if any, associated with its use. It is the
pressure, flow, temperature, and accuracy.
responsibility of the user of this standard to establish appro-
4.2 Filtered Gas System—See Fig. 1.
priate safety and health practices and determine the applica-
4.3 Stop Watch or Timer, with a+1,−0-s resolution.
bility of regulatory limitations prior to use. For hazard
statements, see Section 5.
4.4 Miscellaneous Fittings, as needed for sampling point
adaption, cleaned and packaged within system contamination
2. Terminology
requirements.
2.1 Definitions:
4.5 Connecting Lines, cleaned and packaged within system
2.1.1 downstream terminal point—the point in a gas system
contamination requirements.
from which gas is fed into a further system or component,
4.6 Flowmeter,calibratedforthesampleportfluid,flow,and
usually the designated “sample port.”
temperature requirements.
2.1.2 filtered gas system—agassystemthatisequippedwith
required filtration devices to furnish gas that is suitably clean
5. Hazards
for the intended application.
5.1 Personnel must stand clear of exiting gas.
2.1.3 purge—to flush a gas supply system or component
5.2 Ear protection must be used when gas flow approaches
with a regulated flow of gas.
sonic velocity.
2.1.4 sample port—the designated point in a gas system or
5.3 All lines and associated system components must be
component from which a representative gas sample may be
connected and operated within the requirements of recognized
taken.
safety codes.
3. Summary of Practice
6. Procedure
3.1 The pressurized gas system or component and the
6.1 Establish a minimum continuous purge pressure of 6.89
apparatus are prepared in accordance with the requirements of
3 3
kPa (1 psig) gage or 2.83 dm /min (0.1 ft /min), flow from the
the users sample analysis procedure. The sensing unit of the
filtered gas pressure supply.
6.2 Connect one end of a suitable connecting line to the
1
This practice is under the jurisdiction of ASTM Committee E21 on Space
purge outlet of 6.1, and then connect the other end to the inlet
Simulation andApplications of SpaceTechnology and is the direct responsibility of
Subcommittee E21.05 on Contamination.
of the component or system to be sampled.
Current edition approved Nov. 1, 2008. Published December 2008. Originally
approvedin1972.Lastpreviouseditionapprovedin2000asF327–78(2000).DOI: NOTE1—Ifthesystemtobesampledisalreadyconnectedtothefiltered
10.1520/F0327-08. gas pressure supply, then establish the purge as noted in 6.1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
F327 − 08
FIG. 1 Filtered Gas System
6.3 Connect a suitable connecting line from the sample port required sample volume within the capability of the sensor.
to the inlet of the automatic monitor sensing device. (When no Remove the flowmeter after adjusting the flow.
sample port is designated, use the down-stream terminal point
6.7 Set automatic monitor display to zero.
from which purge gas is flowing.)
6.8 Simultaneously begin automatic particulate counting,
6.4 Increase the purge to one of the following:
sizing and timing of volumetric flow.
3 3
6.4.1 8.49-dm /min (0.3-ft /min) flow,
6.9 Record particulate contamination counts on the monitor
6.4.2 34.5-kPa (5-psig) gage pressure, or
display for the required sample volume.
6.4.3 5%ofsystemoperatingpressurewhenthispressureis
less than 34.5-kPa (5-psig) gage.
6.10 Adjust the continuous purge to the level in 6.4.
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:F327–78(Reapproved2000) Designation:F327–08
Standard Practice for
Sampling Gas Blow Down Systems and Components for
Particulate Contamination by Automatic Particle Monitor
1
Method
This standard is issued under the fixed designation F327; 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
1.1 This practice describes how to connect, prepare, and sample pressurized gas systems (having up to 0.75-in. (19.1-
mm)19.1-mm (0.75-in.) diameter lines) for particulate contamination by using an automatic monitor.
1.2 The values stated in inch-poundMKS 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 statements, see Section 5.
2. Terminology
2.1 Definitions:
2.1.1 downstream terminal point—the point in a gas system from which gas is fed into a further system or component, usually
the designated “sample port.”
2.1.2 filtered gas system—a gas system that is equipped with required filtration devices to furnish gas that is suitably clean for
the intended application.
2.1.3 purge—to flush a gas supply system or component with a regulated flow of gas.
2.1.4 sample port—the designated point in a gas system or component from which a representative gas sample may be taken.
3. Summary of Practice
3.1 The pressurized gas system or component and the apparatus are prepared in accordance with the requirements of the users
sample analysis procedure. The sensing unit of the automatic particle monitor is connected to the designated sample port which
is under purge condition. The system flow-rate is adjusted to the sample flow rate requirement. All the gas passing through the
sensing unit is monitored for particulate contamination until the required sample volume has been analyzed.
4. Apparatus
4.1 Automatic Monitor, with sensor that sizes and counts all entering fluid in accordance with the users requirements for
pressure, flow, temperature, and accuracy.
4.2 Filtered Gas System—See Fig. 1.
4.3 Stop Watch or Timer, with a+1,−0-s resolution.
4.4 Miscellaneous Fittings, as needed for sampling point adaption, cleaned and packaged within system contamination
requirements.
4.5 Connecting Lines, cleaned and packaged within system contamination requirements.
4.6 Flowmeter, calibrated for the sample port fluid, flow, and temperature requirements.
5. Hazards
5.1 Personnel must stand clear of exiting gas.
5.2 Ear protection must be used when gas flow approaches sonic velocity.
5.3 All lines and associated system components must be connected and operated within the requirements of recognized safety
codes.
1
This practice is under the jurisdiction of ASTM Committee E21 on Space Simulation and Applications of Space Technology and is the direct responsibility of
Subcommittee E21.05 on Contamination.
Current edition approved Aug. 25, 1978. Published October 1978. Originally published as F327–72. Last previous edition F327–72.
Current edition approved Nov. 1, 2008. Published December 2008. Originally approved in 1972. Last previous edition approved in 2000 as F327–78(2000).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
F327–08
FIG. 1 Filtered Gas System
6. Procedure
Establish a minimum continuous purge pressure of
6.1 Establish a minimum continuous purge pressure of 1 psig (6.89 kPa) gage or 0.1 ft
3 3
/min (0.1 ft
6.89 kPa (1 psig) gage or 2.83 dm/min (2.83 dm /min), flow from the filtered gas pressure supply.
6.2 Connect one end of a suitable connecting line to the purge outlet of 6.1, and then connect the other end to the inlet of the
component or system to be sampled.
NOTE 1—If the system to be sampled is already connected to the filtered gas pressure supply, then establish the purge as noted in 6.1.
6.3 Connect a suitable connecting line from the sample port to the inlet of the automatic monitor sensing device. (When no
sample port is designated, use the down-stream terminal point from which purge
...
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