IPEIA Webinar – August 19, 2021, 10AM to 11:30AM MST
Technical Presentation: “Is it time for a RBI Lite? Find a way to implement a lite RBI systems and keep it simple”
DR. Izak Roux, Sr. Engineer, Roux Engineering
The first step in a pressure vessel inspection program is a time based inspection program, following guidelines from the jurisdiction or API 510. This limit the owner to a fixed inspection interval that do not take the actual damage mechanism, operating conditions and corrosion rate in consideration. As soon as the owner/operator want to take credit for low corrosion rates or very little damage observed during inspections an RBI program is the next step. However, an RBI program in accordance with API 580 or ASME PCC3 follows a systems approach and is an extensive program to implement. Most of the time an RBI program is suitable for refineries and chemical plants with extensive historical data and it requires extensive corrosion systems analysis. RBI is not easy to implement on smaller and newer plants with less pressure equipment data/history available. This presentation will propose an alternative approach more suitable for smaller plants with less equipment data available. The proposed approach will consider individual vessels, to access the risk level and consequence of failure for the vessel in the present operating environment, considering similar vessels in operation at the same plant or other plants operated by the owner and determine a damage rate and confidence in detection of potential damage during inspection. This approach is less data intensive and focus on individual pressure equipment rather than on systems.
Technical Presentation: “Acoustic Emission: A Tool for Pre-Turnaround Screening and Planning”
Mr. Sam Ternowchek, Vice President, Acoustic Emission Business Development, Mistras Group
The more information that is available about an asset ‘s mechanical integrity when planning for a TAR, the more effective the workscope will be when it’s time for the turnaround. Much can be learned about an assets overall condition prior to the turnaround by utilizing various on stream NDT techniques. One technique, acoustic emission (AE), provides several advantages over other on stream methods. For example, AE testing provides a means of monitoring the complete structure, “global surveillance”, during a single test. It is a highly sensitive technique capable of detecting defects at an early stage of development. For insulated equipment, there is a minimum disturbance of insulation. In API Recommend Practice 581 it is rated as a Usually Effective Technique under the Non-Intrusive Inspection for several of the cracking issues in pressure vessels. This makes it a method of choice for evaluating assets for defects such as in service crack development/growth.
This presentation will present examples of how the use of AE as a pre-turnaround, on stream, testing technique can aid in the workscope planning for pressurized equipment, e.g. crack detection in storage bullets and spheres; cracking in pressure vessels; integrity of refrigerated ammonia storage tank; through valve leakage in valves; active corrosion detection in atmospheric storage tanks. It will also include a means of relating the AE data to the integrity of the asset.