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Interested in a bit of cylinder history? This whitepaper has all of the details on these often misunderstood and mis-handled cylinders.

Regulatory history of cylinders - ICC‑3 cylinders are still legal for use

ICC‑3 markings are unique and often misunderstood

Understand the correct markings and use of ICC-3 cylinders

Regulatory Confidence Starts Here: A Modern Look at ICC‑3 Cylinder Use and Requalification

This document provides historical, regulatory, and practical guidance related to ICC‑3 compressed gas cylinders, one of the earliest U.S. cylinder specifications. It explains how these cylinders—manufactured prior to 1970 under Interstate Commerce Commission (ICC) regulations—remain authorized for use under today’s DOT regulations, provided they meet current requirements.

Requalification, Filling and Use of ICC-3 Cylinders

Regulatory Confidence Starts Here: A Modern Look at ICC‑3 Cylinder Use and Requalification