設備檢查概論(文件)

　

【正文】 e size ? Sophisticated analysis aids interpretation of results ? Minimum insulation removal for testing (1m) ? Difficulttoinspect areas (such as roadways) can be screened for defects Testing Cryogenic Tank Walls with AE ? Global Monitoring Sensors detect AE signals from considerable distances, making this method ideal for global monitoring of large vessels and systems. Identified problem areas can then be inspected using other NDT methods. ? Minor Disturbance of Insulation Only small holes in insulation are required for sensor mounting. ? OnLine Testing. Opening a tank introduces oxygen into the tank. When the tank is put back into service the corrosion process starts all over again. ? Cost Reduction. In ammonia applications, it can cost up to $1,000,000 just for a nitrogen purge.. The use of AE can reduce plant maintenance costs considerably, while increasing the information available about plant integrity. Plant downtime for inspection is also minimized. ? Rapid Inspection The actual AE test takes a matter of hours, and in some cases, considerably less. No parable method can provide 100% volumetric inspection in the same amount of time. ? Permanent Record of Test Data is digitized and stored on disk, providing a permanent record of Leak Detection using Acoustic Emission Valve Leakage procedures for the detection of leaks through valves have been developed for use in refineries, chemical plants and offshore platforms. It enables estimation of throughvalve gas losses and leak rate. Pipeline Leakage Inspection of whole structure performed during operating conditions, even of difficulttoreach areas. Requires minimum access to surface for sensors mounting. OnLine Tank Floor Inspection with TANKPAC ? No Need to Empty or Clean the Tank ? 100% Floor Inspection ? Verified Reliability ? Inspection and Evaluation of Annular Ring ? Immediate Results ? Rapid testing: 50 meter tank in one day ? Identify tanks that need inspection and repair ? Leave good tanks online and save the shutdown and cleaning costs FitnessForServiceAPI 5791/ASME FFS1 ? FitnessForService (FFS) assessments are quantitative engineering evaluations that are performed to demonstrate the structural integrity of an inservice ponent that may contain a flaw or damage. ? This Standard provides guidance for conducting FFS assessments using methodologies specifically prepared for pressurized equipment. The guidelines provided in this Standard can be used to make runrepairreplace decisions to help determine if pressurized equipment containing flaws that have been identified by inspection can continue to operate safely for some period of time. ? These FFS assessments are currently recognized and referenced by the API Codes and Standards (510, 570, amp。 真空試漏