ASTM F1792-97(2016)e1

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.

General Information

• Status: Historical
• Publication Date: 31-Aug-2016
• ICS: 23.060.01 - Valves in general
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
´1
Designation:F1792 −97 (Reapproved 2016) 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.
ε NOTE—Keywords were added editorially in September 2016.
1. Scope Oxygen, Nitrogen, and Hydrogen Systems
MIL-V-5027 Valves, Check, Oxygen, High Pressure
1.1 This specification covers the special requirements for
MIL-STD-278 Fabrication,Welding and Inspection; Casting
valves used in gaseous oxygen service. It is intended that this
Inspection and Repair for Machinery, Piping and Process
specification be invoked as an additional requirement in
Vessels in Ships of the United States Navy
conjunction with primary valve specifications.
MIL-STD-271 Non-destructive Testing Requirements for
1.2 The values stated in inch-pound units are to be regarded
Metals
as standard. The values given in parentheses are mathematical
MIL-P-46122 PlasticMoldingandExtrusionMaterial,Poly-
conversions to SI units that are provided for information only
vinylidene Fluoride Polymer and Copolymer
and are not considered standard.
3. Ordering Information
2. Referenced Documents
3.1 Ordering documentation for valves under this specifica-
2.1 ASTM Standards:
tion shall include the following information, as required, to
G63 Guide for Evaluating Nonmetallic Materials for Oxy-
describe the equipment adequately.
gen Service
3.1.1 ASTM designation and year of issue.
G88 Guide for Designing Systems for Oxygen Service
3.1.2 Primary valve specification (see 1.1).
G93 Practice for Cleaning Methods and Cleanliness Levels
3.1.3 End preparations, if different than specified in 4.4.
for Material and Equipment Used in Oxygen-Enriched
3.1.4 Supplementary requirements, if any (see S1 through
Environments
S4).
G94 Guide for Evaluating Metals for Oxygen Service
2.2 ANSI Standard: 4. Valve Design and Construction
ANSI B1.1 Unified Screw Threads
4.1 Valves shall incorporate the features specified in 4.2 –
2.3 ASME Standard:
4.6.
ASME Boiler and Pressure Vessel Code
5 4.2 Materials of Construction—Material requirements shall
2.4 Military Standards and Specifications:
be as follows:
MIL-STD-1330 Standard Practice for Precision Cleaning
4.2.1 The pressure containing/retaining envelope (including
and Testing of Shipboard Oxygen, Helium, Helium-
any bolting, union nuts, or other fastening devices establishing
the integrity of the pressure containing/retaining envelope),
This specification is under the jurisdiction of ASTM Committee F25 on Ships
bellows (where applicable), and end nipples, shall be nickel-
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
copper (70-30). Internal trim which is in contact with the line
Machinery and Piping Systems.
Current edition approved Sept. 1, 2016. Published September 2016. Originally
media shall be nickel-copper (70-30), bronze, nickel-
approved in 1997. Last previous edition approved in 2010 as F1792 – 97 (2010).
aluminum-bronze, InconelAlloy 600, brass, or other materials
DOI: 10.1520/F1792-97R16E01.
2 which are compatible with oxygen service.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
4.2.2 Non-metallicseat,seatinsert,orseals.Thesematerials
Standards volume information, refer to the standard’s Document Summary page on
shall be selected from TFE, Reinforced TFE, CTFE, plastic in
the ASTM website.
accordance with MIL-P-46122, Polyamide (Vespel), or PEEK.
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
The materials for O-rings and gaskets shall be compatible for
4th Floor, New York, NY 10036, http://www.ansi.org.
Available from American Society of Mechanical Engineers (ASME), ASME
oxygen service.
International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
4.2.3 Lubricants—Materials for lubricants shall be halocar-
www.asme.org.
5 bon (25-5S), Dupont (Krytox 240AC, 240AZ), Braycote 601,
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. or other lubricants compatible with oxygen service.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
F1792−97 (2016)
4.2.4 Guidance on the selection of materials for oxygen shall be completely chamfered and deburred to prevent the
service can be found in Guides G63 and G94. Guidance on possibility of sharp edges or machining burrs in contact with
designing systems for oxygen service can be found in Guide oxygen.
G88. 4.4.3 Cleaning—Prior to assembly and testing, valves shall
bedegreasedandcleanedinaccordancewithPracticeG93,and
4.3 General Requirements:
thereafter maintained clean for oxygen service.
4.3.1 Fire Prevention—Valves shall be constructed to mini-
4.5 End Preparation—Unless otherwise specified (see Sec-
mize the possibility of initiating ignition in gaseous oxygen
tion 3), end preparation for the valves shall be as follows:
service. This shall be accomplished by the following:
4.5.1 Valves shall be supplied with inline extension nipples
4.3.1.1 Materials for parts in contact with oxygen shall have
welded directly to the valve body or fabricated as an integral
the highest spontaneous ignition temperatures and the lowest
part of the valve body. Nipples shall be of the same basic
impact sensitivities compatible with construction and perfor-
material as the body. The length and schedule of these nipples
mance limitations.
shall be as specified in Table 1.
4.3.1.2 Surfaces in contact with oxygen shall be smooth
4.6 Welding and Nondestructive Testing—Welding and non-
with well-rounded edges and without sharp or thin sectioned
destructive testing shall be in accordance with ASME Boiler
protrusions (that is, all parts shall have a high ratio of
and Pressure Vessel Code, Sections VIII and IX.
volume-to-surface area). Sharp exterior corners are prohibited,
and interior corners shall have fillets to prevent the retention or
5. Marking
entrapment of machining chips, burrs, or foreign material.
5.1 Identification Plates—A metallic corrosion-resisting
4.3.1.3 Nonmetallic materials (O-rings, gaskets, etc.) other
identification plate shall be securely attached to the valve and
than the seating insert, if applicable, shall be well removed
shall indicate “Valve specially made for oxygen service”.
from the main flow path.
5.2 In addition, each valve shall be marked in accordance
4.3.2 Fire Containment—Valves shall be constructed to
with their applicable primary valve specification requirements.
minimize oxygen escape in the event of an internal or external
fire. This shall be accomplished by the following:
6. Quality Assurance System
4.3.2.1 Pressure-Boundary Sealing—Joints for the pressure-
6.1 The manufacturer shall establish and maintain a quality
boundary seals shall provide an effective barrier to leakage in
assurance system that will ensure all the requirements of this
the event of damage or consumption of the non-metallic
specification are satisfied.
sealingelementsbyprovidinglong,closefittingmetal-to-metal
6.2 Awrittendescriptionofthequalityassurancesystemthe
leakage or flame paths.
manufacturer will use shall be available for review and
4.3.2.2 Internal Seating—The seat design shall be such that
acceptance by the inspection authority.
intheeventthatthenon-metallicseatisdamaged,destroyed,or
6.3 The purchaser reserves the right to witness any tests and
carried away, there will be a secondary metal-to-metal seat to
inspect the valves in the manufacturer’s plant to the extent
minimize through seat leakage. The construction and location
specified on the purchase order.
of the nonmetallic seals and seating inserts shall minimize the
possibility of ignition under a pressure surge.
7. Keywords
4.3.2.3 Pressure Surge—Valves shall be designed to prevent
7.1 gaseous; oxygen; valve
pressure surge, which could cause auto-ignition.
TABLE 1 Length and Schedule of Extension Nipples
4.4 Design Features:
Minimum Length
4.4.1 Manualvalvesshallbeofthepacklessdesign,withthe
of Extension,
Size of Valve Pipe Schedule
stem sealed by a bellows. inches (Valve
Center to End)
4.4.2 Threads—Threads shall conform to ANSI B1.1. Use
⁄4 NPS to 1 NPS (13.5 mm to 33.7 mm) 80 7.00 (178 mm)
of threads in contact with oxygen shall be minimized.
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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.
´1
Designation: F1792 − 97 (Reapproved 2010) F1792 − 97 (Reapproved 2016)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.
ε NOTE—Keywords were added editorially in September 2016.
1. 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 this specification in inch-pound units are to be regarded as the standard. The SI equivalent shown in
parenthesis standard. The values given in parentheses are mathematical conversions to SI units that are provided for information
only.only and are not considered standard.
2. Referenced Documents
2.1 ASTM Standards:
G63 Guide for Evaluating Nonmetallic Materials for Oxygen Service
G88 Guide for Designing Systems for Oxygen Service
G93 Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched Environments
G94 Guide for Evaluating Metals for Oxygen Service
2.2 American National Standards Institute (ANSI):ANSI Standard:
ANSI B1.1 Unified Screw Threads
2.3 American Society of Mechanical Engineers (ASME):ASME Standard:
ASME Boiler and Pressure Vessel Code Boiler and Pressure Vessel Code
2.4 Military Standards and Specifications:
MIL-STD-1330 Standard Practice for Precision Cleaning and Testing of Shipboard Oxygen, Helium, Helium-Oxygen, Nitrogen,
and Hydrogen Systems
MIL-V-5027 Valves, Check, Oxygen, High Pressure
MIL-STD-278 Fabrication, Welding and Inspection; Casting Inspection and Repair for Machinery, Piping and Process Vessels
in Ships of the United States Navy
MIL-STD-271 Non-destructive Testing Requirements for Metals
MIL-P-46122 Plastic Molding and Extrusion Material, Polyvinylidene Fluoride Polymer and Copolymer
3. Ordering Information
3.1 Ordering documentation for valves under this specification shall include the following information, as required, to describe
the equipment adequately.
3.1.1 ASTM designation and year of issue.
3.1.2 Primary valve specification (see 1.1).
3.1.3 End preparations, if different than specified in 4.4.
This specification is under the jurisdiction of ASTM Committee F25 on Ships and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
Machinery and Piping Systems.
Current edition approved May 1, 2010Sept. 1, 2016. Published June 2010 September 2016. Originally approved in 1997. Last previous edition approved in 20042010 as
F1792 - 97 (2004).F1792 – 97 (2010). DOI: 10.1520/F1792-97R10.10.1520/F1792-97R16E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, ThreeTwo Park Ave., New York, NY 10016-5990,
http://www.asme.org.
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F1792 − 97 (2016)
3.1.4 Supplementary requirements, if any (see S1 through S4).
4. Valve Design and Construction
4.1 Valves shall incorporate the features specified in 4.2 – 4.6.
4.2 Materials of Construction—Material requirements shall be as follows:
4.2.1 The pressure containing/retaining envelope (including 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-copper
(70-30). Internal trim which is in contact with the line media shall be nickel-copper (70-30), bronze, nickel-aluminum-bronze,
Inconel Alloy 600, brass, or other materials which are compatible with oxygen service.
4.2.2 Non-metallic seat, seat insert, or seals. These materials shall be selected from TFE, Reinforced TFE, CTFE, plastic in
accordance with MIL-P-46122, Polyamide (Vespel), or PEEK. The materials for O-rings and gaskets shall be compatible for
oxygen service.
4.2.3 Lubricants—Materials for lubricants shall be halocarbon (25-5S), Dupont (Krytox 240 AC, 240 AZ), Braycote 601, or
other lubricants compatible with oxygen service.
4.2.4 Guidance on the selection of materials for oxygen service can be found in Guides G63 and G94. Guidance on designing
systems for oxygen service can be found in Guide G88.
4.3 General Requirements:
4.3.1 Fire Prevention—Valves shall be constructed to minimize the possibility of initiating ignition in gaseous oxygen service.
This shall be accomplished by the following:
4.3.1.1 Materials for parts in contact with oxygen shall have the highest spontaneous ignition temperatures and the lowest
impact sensitivities compatible with construction and performance limitations.
4.3.1.2 Surfaces in contact with oxygen shall be smooth with well-rounded edges and without sharp or thin sectioned
protrusions (that is, all parts shall have a high ratio of volume-to-surface area). Sharp exterior corners are prohibited, and interior
corners shall have fillets to prevent the retention or entrapment of machining chips, burrs, or foreign material.
4.3.1.3 Nonmetallic materials (O-rings, gaskets, etc.) other than the seating insert, if applicable, shall be well removed from the
main flow path.
4.3.2 Fire Containment—Valves shall be constructed to minimize oxygen escape in the event of an internal or external fire. This
shall be accomplished by the following:
4.3.2.1 Pressure-Boundary Sealing—Joints for the pressure-boundary seals shall provide an effective barrier to leakage in the
event of damage or consumption of the non-metallic sealing elements by providing long, close fitting metal-to-metal leakage or
flame paths.
4.3.2.2 Internal Seating—The seat design shall be such that in the event that the non-metallic seat is damaged, destroyed, or
carried away, there will be a secondary metal-to-metal seat to minimize through seat leakage. The construction and location 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 pressure surge, which could cause auto-ignition.
4.4 Design Features:
4.4.1 Manual valves shall be of the packless design, with the stem sealed by a bellows.
4.4.2 Threads—Threads shall conform to ANSI B1.1. Use of threads in contact with oxygen shall be minimized. Any threads
wetted by oxygen shall be of rolled construction or shall be completely chamfered and deburred to prevent the possibility of sharp
edges or machining burrs in contact with oxygen.
4.4.3 Cleaning—Prior to assembly and testing, valves shall be degreased and cleaned in accordance with Practice G93, and
thereafter maintained clean for oxygen service.
4.5 End Preparation—Unless otherwise specified (see Section 3), end preparation for the valves shall be as follows:
4.5.1 Valves shall be supplied with inline extension nipples welded directly to the valve body or fabricated as an integral part
of the valve body. Nipples shall be of the same basic material as the body. The length and schedule of these nipples shall be as
specified in Table 1.
4.6 Welding and Nondestructive Testing—Welding and nondestructive testing shall be in accordance with ASME Boiler and
Pressure Vessel Code, Sections VIII and IX.
TABLE 1 Length and Schedule of Extension Nipples
Minimum Length
of Extension,
Size of Valve Pipe Schedule
inches (Valve
Center to End)
⁄4 NPS to 1 NPS (13.5 mm to 33.7 mm) 80 7.00 (178 mm)
1 1
1- ⁄2 NPS to 2- ⁄2 NPS (48.3 mm to 73.0 mm) 160 12.0 (305 mm)
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F1792 − 97 (2016)
5. Marking
5.1 Identification Plates—A metallic corrosion-resisting identification plate shall be securely attached to the valve and shall
indicate “Valve specially made for oxygen service”.
5.2 In addition, each valve shall be marked in accordance with their applicable primary valve specification requirements.
6. Quality Assurance System
6.1 The manufacturer shall establish and maintain a quality assurance system that will ensure a
...