ASTM G175-03(2011)

Standard Test Method for Evaluating the Ignition Sensitivity and Fault Tolerance of Oxygen Regulators Used for Medical and Emergency Applications

SIGNIFICANCE AND USE
This test method comprises two phases and is used to evaluate the ignition sensitivity and fault tolerance of oxygen regulators used for medical and emergency applications.
Phase 1: Oxygen Pressure Shock Test—The objective of this test phase is to determine whether the heat from oxygen pressure shocks will result in burnout or visible heat damage to the internal parts of the regulator. Phase 1 is performed according to ISO 10524, Section 11.8.1.
The criteria for an acceptable test are specified in ISO 10524, Section 11.8.1.
The pass/fail criteria for a regulator are specified in ISO 10524, Section 11.8.1.
Phase 2: Regulator Inlet Promoted Ignition Test—The objective of this test phase is to determine if an ignition event upstream of the regulator inlet filter will result in sustained combustion and burnout of the regulator.
The criterion for an acceptable test is either, (1) failure of the regulator, which is defined as the breach of the pressurized regulator component (burnout) and ejection of molten or burning metal or any internal parts from the regulator, or (2) if the regulator does not fail, consumption of at least 90 % of the ignition pill as determined by visual inspection or mass determination. Failure of the regulator at the seal ring does not constitute an acceptable test.
Momentary (less than 1 s) ejection of flame through normal vent paths, with sparks that look similar to those from metal applied to a grinding wheel, is acceptable.
SCOPE
1.1 This standard describes a test method for evaluating the ignition sensitivity and fault tolerance of oxygen regulators used for medical and emergency applications.
1.2 For the purpose of this standard, a pressure regulator is a device, also called a pressure-reducing valve, that is intended for medical or emergency purposes and that is used to convert a medical or emergency gas pressure from a high, variable pressure to a lower, more constant working pressure [21 CFR 868.2700 (a)].
1.3 This standard applies only to oxygen regulators used for medical and emergency applications that are designed and fitted with CGA 540 inlet connections or CGA 870 pin-index adapters (CGA V-1).
1.4 This standard provides an evaluation tool for determining the fault tolerance of oxygen regulators used for medical and emergency applications. A fault tolerant regulator is defined as (1) having a low probability of ignition as evaluated by rapid pressurization testing, and (2) having a low consequence of ignition as evaluated by forced ignition testing.
1.5 This standard is not a design standard; however, it can be used to aid designers in designing and evaluating the safe performance and fault tolerance capability of oxygen regulators used for medical and emergency applications (Guide G128).
Note 1—It is essential that a risk assessment be carried out on breathing gas systems, especially concerning oxygen compatibility (refer to Guides G63 and G94) and toxic product formation due to ignition or decomposition of nonmetallic materials as weighed against the risk of flammability (refer to ISO 15001.2). See Appendix X1 and X2.1 for details.
1.6 This standard is also used to aid those responsible for purchasing or using oxygen regulators used for medical and emergency applications in ensuring that selected regulators are tolerant of the ignition mechanisms that are normally active in oxygen systems.
1.7 This standard does not purport to address the ignition sensitivity and fault tolerance of an oxygen regulator caused by contamination during field maintenance or use. Regulator designers and manufacturers should provide design safeguards to minimize the potential for contamination or its consequences (Guide G88).
1.8 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...

General Information

• Status: Historical
• Publication Date: 31-Mar-2011
• ICS: 11.040.10 - Anaesthetic, respiratory and reanimation equipment
• Technical Committee: G04 - Compatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres
• Drafting Committee: G04.01 - Test Methods

Relations

• Replaces: ASTM G175-03 - Standard Test Method for Evaluating the Ignition Sensitivity and Fault Tolerance of Oxygen Regulators Used for Medical and Emergency Applications
• Effective Date: 01-Apr-2011
• Referred By: ASTM G128/G128M-15(2023) - Standard Guide for Control of Hazards and Risks in Oxygen Enriched Systems
• Effective Date: 01-Apr-2011
• Referred By: ASTM G88-21 - Standard Guide for Designing Systems for Oxygen Service
• Effective Date: 01-Apr-2011
• Referred By: ASTM G74-13(2021) - Standard Test Method for Ignition Sensitivity of Nonmetallic Materials and Components by Gaseous Fluid Impact
• Effective Date: 01-Apr-2011

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: G175 − 03(Reapproved 2011)
Standard Test Method for
Evaluating the Ignition Sensitivity and Fault Tolerance of
Oxygen Regulators Used for Medical and Emergency
1
Applications
This standard is issued under the fixed designation G175; 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 emergency applications in ensuring that selected regulators are
tolerant of the ignition mechanisms that are normally active in
1.1 This standard describes a test method for evaluating the
oxygen systems.
ignition sensitivity and fault tolerance of oxygen regulators
used for medical and emergency applications. 1.7 This standard does not purport to address the ignition
sensitivityandfaulttoleranceofanoxygenregulatorcausedby
1.2 For the purpose of this standard, a pressure regulator is
contamination during field maintenance or use. Regulator
a device, also called a pressure-reducing valve, that is intended
designers and manufacturers should provide design safeguards
for medical or emergency purposes and that is used to convert
tominimizethepotentialforcontaminationoritsconsequences
a medical or emergency gas pressure from a high, variable
(Guide G88).
pressure to a lower, more constant working pressure [21 CFR
1.8 This standard does not purport to address all of the
868.2700 (a)].
safety concerns, if any, associated with its use. It is the
1.3 This standard applies only to oxygen regulators used for
responsibility of the user of this standard to establish appro-
medical and emergency applications that are designed and
priate safety and health practices and determine the applica-
fitted with CGA 540 inlet connections or CGA 870 pin-index
bility of regulatory limitations prior to use.
adapters (CGA V-1).
1.4 This standard provides an evaluation tool for determin-
2. Referenced Documents
ing the fault tolerance of oxygen regulators used for medical
2
2.1 ASTM Standards:
and emergency applications. A fault tolerant regulator is
G63 Guide for Evaluating Nonmetallic Materials for Oxy-
defined as (1) having a low probability of ignition as evaluated
gen Service
by rapid pressurization testing, and (2) having a low conse-
G88 Guide for Designing Systems for Oxygen Service
quence of ignition as evaluated by forced ignition testing.
G93 Practice for Cleaning Methods and Cleanliness Levels
1.5 This standard is not a design standard; however, it can
for Material and Equipment Used in Oxygen-Enriched
be used to aid designers in designing and evaluating the safe
Environments
performance and fault tolerance capability of oxygen regula-
G94 Guide for Evaluating Metals for Oxygen Service
tors used for medical and emergency applications (Guide
G128 Guide for Control of Hazards and Risks in Oxygen
G128).
Enriched Systems
NOTE 1—It is essential that a risk assessment be carried out on 2.2 ASTM Manual:
2
breathing gas systems, especially concerning oxygen compatibility (refer
Manual 36 Safe Use of Oxygen and Oxygen Systems
to Guides G63 and G94) and toxic product formation due to ignition or
2.3 Compressed Gas Association (CGA) Standards:
decomposition of nonmetallic materials as weighed against the risk of
3
CGA E-4 Standard for Gas Pressure Regulators
flammability (refer to ISO 15001.2). See Appendix X1 and X2.1 for
3
details.
CGA G-4 Oxygen
3
CGA G-4.1 Cleaning Equipment for Oxygen Service
1.6 This standard is also used to aid those responsible for
CGA V-1 American National/Compressed Gas Association
purchasing or using oxygen regulators used for medical and
1 2
This test method is under the jurisdiction of ASTM Committee G04 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Compatibility and Sensitivity of Materials in Oxygen EnrichedAtmospheres and is contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
the direct responsibility of Subcommittee G04.01 on Test Methods. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved April 1, 2011. Published April 2011. Originally the ASTM website.
3
published as PS 127 – 00. Last published as B175 – 03. DOI: 10.1520/G0175- Available from Compressed Gas Association (CGA), 4221 Walney Rd., 5th
03R11. Floor, Chantilly, VA 20151-2923, http://www.cganet.com.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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G175 − 03 (2011)
Standard for Compressed Gas Cylinder Valve Outlet and 4.3.1 The criterion for an acceptable test is either, (1) failure
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Inlet Connections of the re
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