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CGA - V-1

STANDARD FOR COMPRESSED GAS CYLINDER VALVE OUTLET AND INLET CONNECTIONS

active, Most Current
Organization: CGA
Publication Date: 1 January 2021
Status: active
Page Count: 180
scope:

The scope of this standard is to provide connections that minimize the possibility of hazardous misconnections. This standard is based on a coordinated plan for the inclusion of future connections as they are required on cylinders that are not permanently manifolded during transport and use. Standard outlet connections for respective gases are fully defined and complete in themselves. These outlet connections are designed to minimize the possibility of hazardous misconnections.

Material specifications

Material specifications are not covered by this standard except where they are essential for maintaining the integrity of noninterchangeability between connections intended for different gas services. See connection nos. 860, 630, and 710. Chemical and physical properties of gases, including pressure, shall be considered to determine the strength and suitability of materials used.

Commodities

Some of the commodities covered by this standard do not meet the generally accepted definition of compressed gas, as defined by the U.S. Department of Transportation (DOT) [1].1 Some products are handled in compressed gas cylinders. In these cases, the cylinder shall have the standard outlet to minimize hazardous misconnections even though it is not required for safe packaging.

Liquid and gas withdrawal

Standards for any of the liquefied gases are suitable for both liquid and gas withdrawal except where a connection standard is limited to liquid withdrawal.

Dimensional units

All dimensions are in inches (millimeters).

In 1970, Canadian Parliament unanimously endorsed the White Paper on Metric Conversion in Canada, proposing the adoption of the most up-to-date metric system of measurement, système international d'unités or SI. The Metric Commission was established in June 1971 to prepare an overall plan for metric conversion. Today, many sectors of industry and commerce in Canada, including the gas industry, sell their products in metric sizes and packages. Since CGA V-1 is used in Canada, it is published with dual units. Conversion factors can be found in CGA P-11, Guideline for Metric Practice in the Compressed Gas Industry [2].

Unless otherwise specified, the metric conversion in this standard is soft and affects no change in the shape of the threads and dimensions to maintain complete interchangeability between parts made either from U.S. customary units or SI measurements. Metric dimensions appear within parentheses and are in millimeters, unless otherwise specified. Exceptionally, the nominal designations of threads (for example, .825-14NGO-RH-EXT) have not been metricated.

Metric thread dimensions have been rounded toward the interior of the tolerance zone. Maximum limits have been rounded downward, while minimum limits have been rounded upward. This method of rounding was selected to permit the use of existing gauges. Other dimensions have been rounded to the nearest significant digit.

Marking and labeling of containers

Although the main purpose in standardizing valve outlets is to prevent interconnection with noncompatible gases, relying only on the valve outlet as the sole method of preventing such interconnection is not advised. The primary means for identifying the contents of any container of compressed gas shall be by means of the chemical name or the commercially accepted name of the material legibly marked on the container.

All cylinders shall be well marked as to contents in accordance with CGA C-7, Guide to Classification and Labeling of Compressed Gases [3]. The user shall rely on such markings to identify contents and understand the properties of the gas or gases to be used to ensure system compatibility.

Effective date

Unless otherwise stated, the effective date of this edition of this standard is May 13, 2021 and shall not be applied retroactively.

Blunting

Modification of the lead thread (blunting) is allowed as long as there is no loss of sealing or structural integrity. Blunting is used to reduce galling.

1 References are shown by bracketed numbers and are listed in order of appearance in the reference section.

Document History

V-1
January 1, 2021
STANDARD FOR COMPRESSED GAS CYLINDER VALVE OUTLET AND INLET CONNECTIONS
The scope of this standard is to provide connections that minimize the possibility of hazardous misconnections. This standard is based on a coordinated plan for the inclusion of future connections as...
January 1, 2019
STANDARD FOR COMPRESSED GAS CYLINDER VALVE OUTLET AND INLET CONNECTIONS
A description is not available for this item.
V-1
January 1, 2013
STANDARD FOR COMPRESSED GAS CYLINDER VALVE OUTLET AND INLET CONNECTIONS
The scope of this standard is to provide connections that minimize the possibility of hazardous misconnections. This standard is based on a coordinated plan for the inclusion of future connections as...
V-1
November 14, 2005
Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections
A description is not available for this item.
V-1
November 14, 2005
Compressed Gas Association Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections
A description is not available for this item.
V-1
November 14, 2005
STANDARD FOR COMPRESSED GAS CYLINDER VALVE OUTLET AND INLET CONNECTIONS
The scope of this standard is to provide connections that minimize the possibility of hazardous misconnections. This standard is based on a coordinated plan for the inclusion of future connections as...
V-1
November 14, 2005
STANDARD FOR COMPRESSED GAS CYLINDER VALVE OUTLET AND INLET CONNECTIONS
The scope of this standard is to provide connections that minimize the possibility of hazardous misconnections. This standard is based on a coordinated plan for the inclusion of future connections as...
V-1
December 30, 2003
Compressed Gas Association Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections
A description is not available for this item.
V-1
December 13, 2002
Compressed Gas Cylinder Valve Outlet and Inlet Connections
A description is not available for this item.
V-1
December 31, 2001
Compressed Gas Cylinder Valve Outlet and Inlet Connections
A description is not available for this item.
V-1
October 1, 1994
Compressed Gas Cylinder Valve Outlet and Inlet Connections
A description is not available for this item.
V-1
January 1, 1994
Compressed Gas Cylinder Valve Outlet and Inlet Connections
A description is not available for this item.

References

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