ASTM F327-78(1996)

Standard Practice for Sampling Gas Blow Down Systems and Components for Particulate Contamination by Automatic Particle Monitor Method

SCOPE
1.1 This practice describes how to connect, prepare, and sample pressurized gas systems (having up to 0.75-in. (19.1-mm) diameter lines) for particulate contamination by using an automatic monitor.
1.2 The values stated in inch-pound 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 problems 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.

General Information

• Status: Historical
• Publication Date: 31-Dec-1999
• Technical Committee: E21 - Space Simulation and Applications of Space Technology
• Drafting Committee: E21.05 - Contamination

Relations

• Replaced By: ASTM F327-78(2000) - Standard Practice for Sampling Gas Blow Down Systems and Components for Particulate Contamination by Automatic Particle Monitor Method
• Effective Date: 01-Jan-2000
• Referred By: ASTM F3187-16 - Standard Guide for Directed Energy Deposition of Metals
• Effective Date: 01-Jan-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 327 – 78 (Reapproved 1996)
Standard Practice for
Sampling Gas Blow Down Systems and Components for
Particulate Contamination by Automatic Particle Monitor
Method
This standard is issued under the fixed designation F 327; 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.
1. Scope particulate contamination until the required sample volume has
been analyzed.
1.1 This practice describes how to connect, prepare, and
sample pressurized gas systems (having up to 0.75-in. (19.1-
4. Apparatus
mm) diameter lines) for particulate contamination by using an
4.1 Automatic Monitor, with sensor that sizes and counts all
automatic monitor.
entering fluid in accordance with the users requirements for
1.2 The values stated in inch-pound units are to be regarded
pressure, flow, temperature, and accuracy.
as the standard. The values given in parentheses are for
4.2 Filtered Gas System—See Fig. 1.
information only.
4.3 Stop Watch or Timer, with a + 1, − 0-s resolution.
1.3 This standard does not purport to address all of the
4.4 Miscellaneous Fittings, as needed for sampling point
safety concerns, if any, associated with its use. It is the
adaption, cleaned and packaged within system contamination
responsibility of the user of this standard to establish appro-
requirements.
priate safety and health practices and determine the applica-
4.5 Connecting Lines, cleaned and packaged within system
bility of regulatory limitations prior to use. For hazard state-
contamination requirements.
ments, see Section 5.
4.6 Flowmeter, calibrated for the sample port fluid, flow,
2. Terminology and temperature requirements.
2.1 Definitions:
5. Hazards
2.1.1 downstream terminal point—the point in a gas system
5.1 Personnel must stand clear of exiting gas.
from which gas is fed into a further system or component,
5.2 Ear protection must be used when gas flow approaches
usually the designated “sample port.”
sonic velocity.
2.1.2 filtered gas system—a gas system that is equipped
5.3 All lines and associated system components must be
with required filtration devices to furnish gas that is suitably
connected and operated within the requirements of recognized
clean for the intended application.
safety codes.
2.1.3 purge—to flush a gas supply system or component
with a regulated flow of gas.
6. Procedure
2.1.4 sample port—the designated point in a gas system or
6.1 Establish a minimum continuous purge pressure of 1
component from which a representative gas sample may be
3 3
psig (6.89 kPa) gage or 0.1 ft /min (2.83 dm /min), flow from
taken.
the filtered gas pressure supply.
6.2 Connect one end of a suitable connecting line to the
3. Summary of Practice
purge outlet of 6.1, and then connect the other end to the inlet
3.1 The pressurized gas system or component and the
of the component or system to be sampled.
apparatus are prepared in accordance with the requirements of
the users sample analysis procedure. The sensing unit of the
NOTE 1—If the system to be sampled is already connected to the filtered
automatic particle monitor is connected to the designated gas pressure supply, then establish the purge as noted in 6.1.
sample port which is under purge condition. The system
6.3 Connect a suitable connecting line from the sample port
flow-rate is adjusted to the sample flow rate requirement. All
to the inlet of the automatic monitor sensing device. (When no
the gas passing through the sensing unit is monitored for
sample port is designated, use the down-stream terminal point
from which purge gas is flowing.)
This practice is under the jurisdiction o
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