Flange joints shall be what class?

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Multiple Choice

Flange joints shall be what class?

Flange joints are rated by a pressure class, which tells you how much pressure the joint can safely withstand. In many fire protection piping systems, a 300 lb class flange is used because it provides a solid safety margin for typical operating pressures and potential pressure surges, without the extra weight and cost of much higher-rated flanges. A lower rating, like 150 lb, may not handle higher system pressures, while much higher ratings (600 or 900 lb) are generally unnecessary unless the system operates at those higher pressures. So, for standard fire protection piping, using the 300 lb class is the appropriate choice.

Flange joints are rated by a pressure class, which tells you how much pressure the joint can safely withstand. In many fire protection piping systems, a 300 lb class flange is used because it provides a solid safety margin for typical operating pressures and potential pressure surges, without the extra weight and cost of much higher-rated flanges. A lower rating, like 150 lb, may not handle higher system pressures, while much higher ratings (600 or 900 lb) are generally unnecessary unless the system operates at those higher pressures. So, for standard fire protection piping, using the 300 lb class is the appropriate choice.

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