At what pressure should hose subjected to flashback or severe wear be tested?

Testing hose subjected to flashback or severe wear is crucial for ensuring safety and operational integrity. The correct procedure dictates that such hoses should be tested at twice their normal operating pressure, with a minimum threshold set to 300 psi. This requirement ensures that any potential weaknesses or damage in the hose are adequately identified before the hose is put back into service.

The rationale behind testing at this pressure is that it accounts for the increased risk associated with hoses that have experienced significant wear or exposure to extreme conditions like flashbacks. By subjecting the hose to a higher pressure, it is likely to reveal any flaws or failures that might not appear during routine operational pressures.

Setting the minimum testing pressure at 300 psi also adds a layer of safety, considering that many hoses will operate below this pressure under normal conditions. Therefore, even in cases where the operating pressure is relatively low, testing at this elevated level ensures a comprehensive evaluation of the hose’s durability and safety before continued use.