Case Studies

TechCorr's reputation is based on our project successes; the delivery of safe, on-time, on-budget projects by quality personnel. TechCorr performs a post mortem inspection of all the projects we complete to help us improve on every project. Below is a partial list of case studies that you can select for further review and evaluation. Contact TechCorr directly for a complete list of case studies and/or access to more detailed information as required.

 

Title	Date
Short Range Ultrasonic Testing (SRUT) Corrosion Under Pipe Supports Short Range Ultrasonic Technique (SRUT) was designed mainly to test the Annular Plate of Above Ground Storage Tanks (AST’s) while the tank remains in-service, finding out Corrosion Under Pipe Supports, corrosion at soil air interfaces, and similar difficult to access locations. The technique is based on the concept of pulsing guided laminar waves into the base material from the chime area. The waves propagate up to three feet into the annular plate. When corrosion, pitting, erosion are present the ultrasonic waves mode convert and are received by the same transducer. TechCorr were contracted to perform a current health assessment of corrosion located under pipe support saddles on critical piping systems located on one of the offshore platform at Major Oil Production Company.	Sep 29, 2011
Inspection of Coke Drum Welds with Phased Array and TOFD In Service Phased Array (PA) and Time of Flight Diffraction (TOFD) technique inspection was carried out on Coke Drum Welds at one of the Refineries in India. TechCorr Was the first Indian Service provider to take up this work in IOCL. Bottom circumferential weld joints (Two nos. in each reactor) and skirt joint of the all 4 nos. reactors was inspected with TOFD and/or Phased Array Techniques. All the indications in welds were inspected by only TOFD and were confirmed by UT phased array examination.	Sep 21, 2011
Pulsed Eddy Current (PEC) Corrosion Under Insulation Survey Pulsed Eddy Current (PEC) inspection was performed on 12 vertical / horizontal vessels at one of the offshore platforms located in India near Mumbai.	Aug 25, 2011
Long Range Ultrasonic Technique (LRUT) Inspection on Heater Radiant Tubes Client : Indian Refinery Location : India Heater Details : Atmospheric Furnace OD: 6” Thickness: 0.28” No. of Passes: 4 No. of tubes: 22 Tube metallurgy: SA335 P5 Length of each tube: 19.1 M Tube alignment: Vertical Vacuum Furnace OD: 4.5”, 6.62”, 8.62” Thickness: 0.237”, 0.28” and 0.332” No. of Passes: 4 No. of tubes: 20 Tube metallurgy: SA335 P9 Length of each tube: 16.3M Tube alignment: Horizontal Inspection Date : June 2010	Aug 17, 2011
Repair of 36 Meter dia. Tank Roof Plate using Power Sleeve Repair System Client : XYZ Refinery Location : Chennai, India Tank Size : 36 Meters dia. Service : Crude oil Temperature : Atmospheric temperature (30 - 45 degrees C) Defect : Plate lap weld joint opened for a length of about 30 cm & 60cm at two locations and few holes suspected at 2 or 3 locations. All due to top side corrosion due to rain water stagnation. Repair Date : March 2011	Jul 26, 2011
Bottom Line Surprise Emergying robotics may be one way of reducing costs, mitigating safety issues and eliminating the environmental impacts of tank inspection.	Jun 11, 2009
Advanced Aboveground Storage Tank Inspections – In-Service Robotics This paper describes the tank inspection requirements (such as New Source Performance Standards [NSPS], 40 CFR 60), conventional inspection techniques (out-of-service, manual, confined space entry, and visual), advanced inspection technologies (in-service robotics), benefits derived from using these advanced technologies, and the status of approval of these technologies by regulatory agencies. The authors also review the unique challenges and implementation circumstances associated with advanced inspection technologies. Finally, the authors present a pilot study currently in progress for the application of advanced inspection technologies to an Internal Floating Roof (IFR) tank subject to NSPS Subpart Kb (Standards of Performance for Volatile Organic Liquid Storage Vessels) requirements.	Jun 02, 2009
Ecuador Pipeline Integrity Assessment Project Client: Petro-Ecuador Location: Eastern Ecuador, Amazon Rain Forest TechCorr (Engineering Division) was contracted to review engineering, construction, inspection and maintenance procedures and practices on block # 17 (Vintage) located in the eastern Ecuador Amazon Rain Forest. The scope of work involved a detailed gathering system piping and facility review as the basis for developing a "Fixed Equipment" risk based inspection and maintenance program.	Feb 16, 2009
PDVSA Pipeline Integrity Assessment Project Client: PDVSA Gas Anaco (National Oil Company of Venezuela) TechCorr was contracted by PDVSA (Petroleos de Venezuela S.A.) to perform a baseline assessment on roughly 500 kilometers of production and transmission assets associated with PDVSA Anaco operating division. The pipeline diameters ranged from 2" up to 36" in diameter both buried and above ground. These pipeline transported natural gas between production fields utilized in the gas injection process as a secondary recovery technique when pressurizing oil reservoirs. Failure of these pipelines was estimated to affect over 200,000 barrels of oil production daily as reservoir pressure could not be maintained.	Feb 16, 2009
Pipeline Integrity Assessment Project Client: Toltest Engineering Location: Monathan Airforce Base - Tucson, Arizona TechCorr was contracted by Toltest Engineering to perform a detailed engineering assessment on the critical fuel piping system at Davis Monathan Airforce Base located in Tucson Arizona. The piping system is designed to fuel US Airforce Fighter Jets. The engineering assessment was designed in accordance with API 570 procedures incorporating visual inspection of all equipment components, ultrasonic thickness surveys on equipment components, hydrostatic testing of main fuel pipeline, guided wave ultrasonic testing on main fuel line and cathodic protection system audit to assure appropriate level three protection. A detailed engineering assessment was completed following the field data collection phase to develop a corrosion mitigation program.	Feb 16, 2009
Pipeline External Corrosion Direct Assessment (ECDA) Project Client: Chevron Global Solutions Location: Maracaibo, Venezuela TechCorr was contracted by Chevron Global Solutions to perform an ECDA (External Corrosion Direct Assessment) and ICDA (Internal Corrosion Direct Assessment) on a 26" diameter 28.6 kilometer buried pipeline system. This is the only pipeline system between the Chevron Boscan production field and Bajo Grande loading terminals. Failure along this pipeline would cut off nearly 123,000 barrels of oil per day to markets world wide.	Feb 16, 2009
Mechanical Integrity Inspection Project Client: Centragas Location: Barranquila, Colombia TechCorr (Inspection Division) was contracted to perform a mechanical integrity inspection using advanced guided wave ultrasonic inspection technology developed by the Pipeline Research Council International on buried compressor station piping systems. The project encompassed compressor stations throughout the Centragas pipeline network in Barranquila Colombia.	Feb 13, 2009