CGA V-1-2023 PDF

Full title and description

CGA V-1 — Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections. This edition establishes standardized valve outlet and inlet connection dimensions, pressure ranges, and identification practices to minimize hazardous misconnections between gas cylinder valves and equipment. It is a principal CGA reference used by gas producers, valve manufacturers, equipment suppliers, and safety/regulatory bodies.

Abstract

This standard specifies physical and performance characteristics for cylinder valve outlets and inlets, defines the standard outlet connections for many gases and services (including medical and SCUBA), and provides procedures for evaluation and introduction of new connections. The document aims to reduce misconnections, improve compatibility, and support safe manufacture and use of cylinder valves and fittings.

General information

• Status: Current (active standard; 16th edition published 2023).
• Publication date: July 6, 2023.
• Publisher: Compressed Gas Association (CGA).
• ICS / categories: Valve connections; compressed gas safety; cylinder valve standards (CGA category: Valve Connections).
• Edition / version: 16th edition (2023).
• Number of pages: 182 pages.

Scope

The standard covers the dimensional, pressure-range, and interface requirements for cylinder valve outlet and inlet connections used on portable compressed gas containers that are not permanently manifolded. It includes standardized outlet connections for a wide range of gases and service types, guidance on adapters and medical gas connections, special-service connections (for SCUBA and ultra-high-integrity applications), and a formal procedure for evaluation and approval of new connections. The intent is to minimize hazardous misconnections and to allow coordinated inclusion of future connections.

Key topics and requirements

• Standardized outlet and inlet connection dimensions and manufacturing tolerances to ensure interchangeability and safety.
• Specified outlet connection pressure ranges and applicability by gas/service.
• Definitions and requirements for adapters and provisions to limit hazardous misconnections.
• Medical gas connection provisions, including pin-index and threaded medical gas interfaces where applicable.
• Sections addressing SCUBA and ultra-high-integrity connections.
• Procedure for evaluation and formal acceptance of new connections into the standard.

Typical use and users

CGA V-1 is used by compressed gas manufacturers and suppliers, cylinder and valve manufacturers, equipment designers, medical gas system installers, diving equipment suppliers, safety and compliance officers, and regulatory bodies that reference industry best practices. It is consulted for design, procurement, manufacturing, and inspection activities involving cylinder valve connections.

Related standards

Closely related CGA publications and standards include other valve/connection documents in the V-series (for example V-9, V-10, V-11, V-12, V-14) and general CGA safety and cylinder standards such as C-1 (pressure testing), C-6 (visual inspection), C-7 (classification and labeling), and P-1 (safe handling of compressed gases). Users often apply V-1 together with these documents when specifying cylinder packages and associated equipment.

Keywords

cylinder valve; outlet connection; inlet connection; CGA V-1; compressed gas; valve dimensions; adapters; medical gas connections; SCUBA; misconnections; valve standards.

FAQ

Q: What is this standard?

A: CGA V-1 is the Compressed Gas Association’s standard that defines standardized valve outlet and inlet connections for compressed gas cylinders to minimize hazardous misconnections and ensure compatible interfaces between cylinders and equipment.

Q: What does it cover?

A: It covers dimensions, pressure ranges, connector identification, adapters, specific provisions for medical and SCUBA services, evaluation procedures for new connections, and related manufacturing and safety considerations for cylinder valve connections.

Q: Who typically uses it?

A: Gas producers, cylinder and valve manufacturers, equipment designers, medical gas system suppliers, diving equipment suppliers, safety engineers, and regulators use CGA V-1 for specification, procurement, manufacturing, and compliance.

Q: Is it current or superseded?

A: The 16th edition, published July 6, 2023, is the current edition of CGA V-1 (superseding prior editions). Users should confirm if any amendments or later editions have been released since 2023 before relying on the standard for new designs or procurement.

Q: Is it part of a series?

A: Yes — V-1 is part of CGA’s V-series of valve and connection standards and is commonly used alongside other CGA documents (V-9, V-10, V-11, etc.) and complementary standards addressing cylinder testing, inspection, labelling, and handling.

Q: What are the key keywords?

A: Cylinder valve, outlet connection, inlet connection, valve dimensions, adapters, medical gas, SCUBA, misconnections, CGA V-1.