CGA C-17-2022 PDF

Full title and description

CGA C-17-2022 — Methods to Avoid and Detect Internal Gas Cylinder Corrosion. Guidance to help prevent and detect internal corrosion in compressed gas cylinders, bundles and tubes, with emphasis on steel cylinders used for oxygen/oxygen mixtures and carbon dioxide/carbon dioxide mixtures in the presence of moisture; guidance may also be applied to other corrosive gas services.

Abstract

This publication provides practical recommendations for identifying sources of moisture contamination, avoiding internal corrosion during handling and storage, and detecting early signs of internal cylinder corrosion before service failure. It consolidates best practices for filling, drying, inspection and acceptance limits to reduce the risk of internal corrosion in service and at customer sites.

General information

• Status: Current (2022 edition, most recent revision of the C-17 family).
• Publication date: 2022 (supersedes CGA C-17-2014; superseded date for the 2014 edition shown as 02‑Mar‑2022).
• Publisher: Compressed Gas Association (CGA).
• ICS / categories: Related to ICS 23.020 (gas cylinders / gas handling and fittings — classification area for compressed gas cylinders).
• Edition / version: 2022 edition (revises CGA C-17:2014).
• Number of pages: Approximately 14 pages (the prior 2014 edition is listed as 14 pages; the 2022 revision is comparable in length).

Scope

The standard applies to portable compressed gas cylinders, bundles of cylinders and tubes (including installations at customer sites). It focuses on internal corrosion caused or accelerated by moisture and specific gas chemistries (notably oxygen and carbon dioxide mixtures), and provides guidance on sources of moisture, acceptance/dryness criteria, preventive measures during filling and storage, and detection/inspection techniques to identify internal corrosion.

Key topics and requirements

• Definitions and mechanisms of internal corrosion in cylinders (including electrochemical and moisture-related mechanisms).
• Sources of moisture contamination and controls during filling, transfer and storage.
• Recommendations for drying, evacuation and acceptable moisture/condensate levels before filling.
• Inspection and detection techniques for internal corrosion (visual, non‑destructive and acceptance criteria).
• Specific guidance for oxygen-bearing and carbon dioxide services and notes on applicability to other corrosive gases.
• Operational practices to reduce corrosion risk at customer sites and during transport.

Typical use and users

Used by compressed gas producers, cylinder filling and requalification facilities, cylinder fleet owners/operators, safety and quality engineers, gas distributors, and facilities that store and use cylinders (including medical, industrial and laboratory users). It is primarily a guidance document to support safe handling and to inform inspection/requalification decisions.

Related standards

Commonly referenced CGA and regulatory documents include CGA C-6 series (visual inspection and requalification), CGA C-7 (labeling and marking), CGA C-22 (water corrosion of composites with AA6061 liners), CGA C-20 (ultrasonic examination), DOT/49 CFR provisions for cylinder transport and requalification, and industry guidance on filling and pressure relief devices.

Keywords

internal corrosion, gas cylinders, cylinder inspection, moisture control, drying, oxygen service, carbon dioxide, requalification, CGA C-17, compressed gas safety

FAQ

Q: What is this standard?

A: CGA C-17-2022 is the Compressed Gas Association guidance document titled "Methods to Avoid and Detect Internal Gas Cylinder Corrosion" that provides recommendations to prevent and detect internal corrosion in cylinders, bundles and tubes.

Q: What does it cover?

A: It covers causes and mechanisms of internal corrosion, sources of moisture contamination, suggested drying and acceptance practices before filling, inspection and detection techniques for internal corrosion, and operational measures to minimize corrosion risk in service and storage.

Q: Who typically uses it?

A: Cylinder filling stations, gas suppliers, maintenance and inspection personnel, safety and quality managers, requalification facilities and end users who store or handle compressed gas cylinders.

Q: Is it current or superseded?

A: The 2022 edition is the most recent edition and it supersedes CGA C-17:2014. The 2014 edition is listed as superseded when the 2022 revision became available.

Q: Is it part of a series?

A: Yes — C-17 sits within the CGA C-series of cylinder‑related guidance and is commonly used alongside other CGA pamphlets and standards addressing cylinder inspection, requalification, filling and labeling (C-6 series, C-7, C-20, C-22, etc.).

Q: What are the key keywords?

A: internal corrosion, moisture, cylinder drying, inspection, oxygen service, carbon dioxide, requalification, CGA C-17.