Leak testing Sample Clauses
Leak testing. No leakage is permitted. Leak testing shall ensure the integrity of the assembled components and shall be accomplished during fabrication, assembly and on the completed assembled units. At the time of assembly, all vessels, piping, components and subassemblies shall be pressure tested with dry oil-free air or nitrogen and examined for leaks using a leak detector solution. The completed assembled unit shall be leak tested to expose all leaks that are detrimental to the operation of the system, including leaks through the seat of valves, through the body of valves and through other piping components. All leaks shall be repaired prior to further testing. After final assembly, each unit shall be leak tested at normal operating pressure for a minimum of 8 hours. The pressure drop shall not exceed 2 percent of the test pressure after compensating for ambient pressure and temperature changes. As an alternative, dynamic testing may be acceptable upon review and approval of OEM test procedures.
Leak testing. For tubular specimens only. The leak tightness is a parameter that evaluates the passage of fluids through the weld interface. It is measured by visual estimation of the amount of bubbles released from the weld interface or by determination of the pressure loss in a certain time range. Checking if a fluid can pass through the joint: • Put the inner part of the joined tubes under air pressure • Immerse the joined tubes • Check if air bubbles occur Note: depending on the application of the joint the leak test is made with different levels of air pressure, water pressure or special gas pressure.