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This document provides information for the design of composite cylinders related to impact testing and service experience with impact, including:

.    low energy impact, which can result from events that can occur during handling or working around cylinders;

.    high energy impact, which can result from accidents during transportation, or impact by large objects with velocity;

.    drop impact, which can result from handling, where cylinders are dropped or tipped over; and

.    high velocity impact, which can result from high energy impact by a small object, such as gunfire, and demonstrates non-shatterability of the cylinder or tube.

Where appropriate, field experience relevant to testing requirements is provided.

NOTE       Unless otherwise stated, the word .cylinder. refers to both cylinders and tubes.