ASTM F1792-97(2021)

Standard Specification for Special Requirements for Valves Used in Gaseous Oxygen Service

ABSTRACT
This specification covers the special requirements for valves used in gaseous oxygen service. The pressure containing/retaining envelope, bellows, and end nipples, shall be made of nickel-copper alloy. Internal trim which is in contact with the line media shall either be made of nickel-copper alloy, bronze, nickel-aluminum-bronze, Inconel alloy 600, brass or other materials which are compatible with oxygen service. Non-metallic seat, seat insert, or seals shall be manufacture from either TFE, reinforced TFE, CTFE, plastic, polyamide, or PEEK. Materials for lubricants shall be halocarbon, Dupont, Barycote 601, or other lubricants compatible with oxygen service. Valves shall be constructed to minimize the possibility of initiating ignition in gaseous oxygen service. Valves shall be constructed to minimize oxygen escape in the event of an internal or external fire. This shall be accomplished by pressure-boundary sealing, internal seating and pressure surge. The manual valves shall be of the packless design, with the stem sealed by a bellows.
SCOPE
1.1 This specification covers the special requirements for valves used in gaseous oxygen service. It is intended that this specification be invoked as an additional requirement in conjunction with primary valve specifications.  
1.2 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.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Dec-2020
• ICS: 23.060.01 - Valves in general
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Relations

• Refers: ASTM G93-03(2011) - Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments
• Effective Date: 01-Apr-2011
• Refers: ASTM G63-99(2007) - Standard Guide for Evaluating Nonmetallic Materials for Oxygen Service
• Effective Date: 15-Mar-2007
• Refers: ASTM G94-05 - Standard Guide for Evaluating Metals for Oxygen Service
• Effective Date: 01-Sep-2005
• Refers: ASTM G88-05 - Standard Guide for Designing Systems for Oxygen Service
• Effective Date: 01-Jul-2005
• Refers: ASTM G93-03e1 - Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments
• Effective Date: 01-Nov-2003
• Refers: ASTM G63-99 - Standard Guide for Evaluating Nonmetallic Materials for Oxygen Service
• Effective Date: 10-Mar-1999
• Refers: ASTM G94-92(1998) - Standard Guide for Evaluating Metals for Oxygen Service
• Effective Date: 10-Sep-1998
• Refers: ASTM G88-90(1997)e1 - Standard Guide for Designing Systems for Oxygen Service
• Effective Date: 01-Jan-1997
• Refers: ASTM G93-96 - Standard Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments
• Effective Date: 10-Apr-1996

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:F1792 −97 (Reapproved 2021) An American National Standard
Standard Specification for
Special Requirements for Valves Used in Gaseous Oxygen
Service
This standard is issued under the fixed designation F1792; 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 2.3 Military Standards and Specifications:
MIL-STD-1330 Standard Practice for Precision Cleaning
1.1 This specification covers the special requirements for
and Testing of Shipboard Oxygen, Helium, Helium-
valves used in gaseous oxygen service. It is intended that this
Oxygen, Nitrogen, and Hydrogen Systems
specification be invoked as an additional requirement in
MIL-V-5027 Valves, Check, Oxygen, High Pressure
conjunction with primary valve specifications.
MIL-STD-278 Fabrication,Welding and Inspection; Casting
1.2 The values stated in inch-pound units are to be regarded
Inspection and Repair for Machinery, Piping and Process
as standard. The values given in parentheses are mathematical
Vessels in Ships of the United States Navy
conversions to SI units that are provided for information only
MIL-STD-271 Non-destructive Testing Requirements for
and are not considered standard.
Metals
1.3 This international standard was developed in accor-
MIL-P-46122 PlasticMoldingandExtrusionMaterial,Poly-
dance with internationally recognized principles on standard- vinylidene Fluoride Polymer and Copolymer
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 3. Ordering Information
mendations issued by the World Trade Organization Technical
3.1 Ordering documentation for valves under this specifica-
Barriers to Trade (TBT) Committee.
tion shall include the following information, as required, to
describe the equipment adequately.
2. Referenced Documents
3.1.1 ASTM designation and year of issue.
2.1 ASTM Standards:
3.1.2 Primary valve specification (see 1.1).
G63 Guide for Evaluating Nonmetallic Materials for Oxy-
3.1.3 End preparations, if different than specified in 4.4.
gen Service
3.1.4 Supplementary requirements, if any (see S1 through
G88 Guide for Designing Systems for Oxygen Service
S4).
G93 GuideforCleanlinessLevelsandCleaningMethodsfor
Materials and Equipment Used in Oxygen-Enriched En- 4. Valve Design and Construction
vironments
4.1 Valves shall incorporate the features specified in 4.2 –
G94 Guide for Evaluating Metals for Oxygen Service
4.6.
2.2 ASME Standards:
4.2 Materials of Construction—Material requirements shall
ASME B1.1 Unified Inch Screw Threads (UN, UNR, and
be as follows:
UNJ Thread Forms)
4.2.1 The pressure containing/retaining envelope (including
ASME Boiler and Pressure Vessel Code
any bolting, union nuts, or other fastening devices establishing
the integrity of the pressure containing/retaining envelope),
bellows (where applicable), and end nipples, shall be nickel-
This specification is under the jurisdiction of ASTM Committee F25 on Ships
copper (70-30). Internal trim which is in contact with the line
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
media shall be nickel-copper (70-30), bronze, nickel-
Machinery and Piping Systems.
Current edition approved Jan. 1, 2021. Published January 2021. Originally
aluminum-bronze, InconelAlloy 600, brass, or other materials
ɛ1
approved in 1997. Last previous edition approved in 2016 as F1792 – 97 (2016) .
which are compatible with oxygen service.
DOI: 10.1520/F1792-97R21.
4.2.2 Non-metallicseat,seatinsert,orseals.Thesematerials
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
shall be selected from TFE, Reinforced TFE, CTFE, plastic in
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Available from American Society of Mechanical Engineers (ASME), ASME
International Headquarters, Two Park Ave., New York, NY 10016-5990, http:// Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
www.asme.org. Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1792−97 (2021)
accordance with MIL-P-46122, Polyamide (Vespel), or PEEK. threads wetted by oxygen shall be of rolled construction or
The materials for O-rings and gaskets shall be compatible for shall be completely chamfered and deburred to prevent the
oxygen service. possibility of sharp edges or machining burrs in contact with
4.2.3 Lubricants—Materials for lubricants shall be halocar- oxygen.
bon (25-5S), Dupont (Krytox 240AC, 240AZ), Braycote 601, 4.4.3 Cleaning—Prior to assembly and testing, valves shall
or other lubricants compatible with oxygen service. be degreased and cleaned in accordance with Guide G93, and
4.2.4 Guidance on the selection of materials for oxygen thereafter maintained clean for oxygen service.
service can be found in Guides G63 and G94. Guidance on
4.5 End Preparation—Unless otherwise specified (see Sec-
designing systems for oxygen service can be found in Guide
tion 3), end preparation for the valves shall be as follows:
G88.
4.5.1 Valves shall be supplied with inline extension nipples
4.3 General Requirements: welded directly to the valve body or fabricated as an integral
4.3.1 Fire Prevention—Valves shall be constructed to mini- part of the valve body. Nipples shall be of the same basic
mize the possibility of initiating ignition in gaseous oxygen material as the body. The length and schedule of these nipples
service. This shall be accomplished by the following: shall be as specified in Table 1.
4.3.1.1 Materials for parts in contact with oxygen shall have
4.6 Welding and Nondestructive Testing—Welding and non-
the highest spontaneous ignition temperatures and the lowest
destructive testing shall be in accordance with ASME Boiler
impact sensitivities compatible with construction and perfor-
and Pressure Vessel Code, Sections VIII and IX.
mance limitations.
4.3.1.2 Surfaces in contact with oxygen shall be smooth
5. Marking
with well-rounded edges and without sharp or thin sectioned
5.1 Identification Plates—A metallic corrosion-resisting
protrusions (that is, all parts shall have a high ratio of
identification plate shall be securely attached to the valve and
volume-to-surface area). Sharp exterior corners are prohibited,
shall indicate “Valve specially made for oxygen service”.
and interior corners shall have fillets to prevent the retention or
5.2 In addition, each valve shall be marked in accordance
entrapment of machining chips, burrs, or foreign material.
with their applicable primary valve specification requirements.
4.3.1.3 Nonmetallic materials (O-rings, gaskets, etc.) other
than the seating insert, if applicable, shall be well removed
6. Quality Assurance System
from the main flow path.
6.1 The manufacturer shall establish and maintain a quality
4.3.2 Fire Containment—Valves shall be constructed to
assurance system that will ensure all the requirements of this
minimize oxygen escape in the event of an internal or external
specification are satisfied.
fire. This shall be accomplished by the following:
4.3.2.1 Pressure-Boundary Sealing—Joints for the pressure-
6.2 Awrittendescriptionofthequalityassurancesystemthe
boundary seals shall provide an effective barrier to leakage in
manufacturer will use shall be available for review and
the event of damage or consumption of the non-metallic
acceptance by the inspection authority.
sealingelementsbyprovidinglong,closefittingmetal-to-metal
6.3 The purchaser reserves the right to witness any tests and
leakage or flame paths.
inspect the valves in the manufacturer’s plant to the extent
4.3.2.2 Internal Seating—The seat design shall be such that
specified on the purchase order.
intheeventthatthenon-metallicseatisdamaged,destroyed,or
carried away, there will be a secondary metal-to-metal seat to
7. Keywords
minimize through seat leakage. The construction and location
7.1 gaseous; oxygen; valve
of the nonmetallic seals and seating inserts shall minimize the
possibility of ignition under a pressure surge.
4.3.2.3 Pressure Surge—Valves shall be designed to prevent TABLE 1 Length and Schedule of Extension Nipples
pressure surge, which could cause auto-ignition.
Minimum Length of
Pipe
Size of Valve Extension, inches (Valve
Schedule
4.4 Design Features:
Center to End)
4.4.1 Manualvalvesshal
...