C-12: Qualification Procedure for Acetylene Cylinder Design
This publication defines test equipment and procedures that are applicable for testing DOT and TC specification acetylene cylinders having a service pressure of 250 psi (1723 kPa).

Regulations in 49 CFR 173.303 and CSA B339 specify that an acetylene cylinder consists of a metal shell filled with a porous mass material, and this material shall be charged with a suitable solvent. Cylinders containing the porous mass material and solvent and representative samples of cylinders charged with acetylene shall be tested with satisfactory results in accordance with this publication.

Regulations in 49 CFR 173.301 and CSA B339 also specify that acetylene cylinders are equipped with pressure relief devices (PRDs) capable of preventing a rupture of the normally charged cylinder when subjected to a fire test.

The tests outlined in 6.1, 6.2, and 6.3 are tests required to prove that the porous mass material, hereafter called filler, when installed in a completed cylinder with solvent and acetylene will:
• stabilize acetylene by preventing progressive decomposition within the filler when subjected to an internal flash or severe impact; and
• not disintegrate or sag when wet with solvent and subjected to normal service (simulated transportation vibrations).

These tests fulfill the requirements of regulations found in 49 CFR 173.303 and CSA B339.

The fire testing outlined in 6.4 fulfills requirements of 49 CFR 173.301 and CSA B339.
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January 2020
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