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Service
United Arab EmiratesRedland Industrial Services (Arabia) Ltd. (RISAL) was founded on 14 September 1976 to undertake a major maintenance contract for hydrocarbon storage tank cleaning, hydro-jetting, surface preparation, and waste disposal services in the Eastern Province of the Kingdom of Saudi Arabia. Risal has been making continuous growth ever since with diversified industrial services and areas of operation to meet the specialized needs of the growing Oil and Gas, Petrochemical, Power, and other Industrial Sectors.
RISAL is active within Saudi Arabia and other GCC Countries, offering a full spectrum of Industrial and Environmental Services.
Following are the major services provided by RISAL.
In refining and chemical plants, accurately monitoring and sizing discontinuities continue to become an essential part of operations, even more so when a risk-based inspection is utilized. As the need for techniques to be more accurate, reliable, effective (in time and cost), and straightforward increases, the TOFD, as a method of detecting faults in welds, has become a broadly employed tool across the industry.
It has great advantages in the speed of detection of defects and is very sensitive and accurate in the defect sizing technique in general use. One of the important advantages of using TOFD for weld inspection is the
absence of radiation. In several validation projects, TOFD has shown a proven record of a high detection rate with very high reliability in preservice and in-service inspections.
Applications
Two main groups of applications are differentiated as follows:
1. Pre-service inspections
2. In-service inspections
PA allows for the detection of discontinuities that are located in difficult-to-observe configurations, requiring the use of special ultrasonic testing methods. PA combined with a rotating sound beam can reach almost any angle and is the best tool to determine and visualize discontinuities.
PA testing has several key benefits; the capability to examine intricate geometries; a fast and efficient speed of inspection; improved accuracy in results; good repeatability, and the ability to visualise signs in base
materials and/or welds through the use of B, C, D, and S-scans (including all A-scans), allowing for data storage and providing a safer method than other NDT testing.
Applications
Internal Rotary Inspection System (IRIS)
Pipes and tubes can be tested using an ultrasonic method known as IRIS, wherein a probe is inserted into a tube flooded with water, and then is slowly released while gathering data. Revealed defects include metal loss from both in and outside of the pipe wall.
Applications
Eddy Current Testing (ECT)
ECT is carried out to examine non-ferromagnetic tubing and is appropriate for spotting a wide range of metal discontinuities: wall loss, baffle cuts, erosion & corrosion, pitting, and wear.
Applications
Condensers
Feedwater Heaters
Heat Exchangers
Air Conditioners
Magnetic Flux Leakage (MFL)
The MFL method is optimal when inspecting ferromagnetic tubes, as it gives a relatively accurate understanding of corrosion-induced metal loss in heat exchanger tubes in a short period.
Applications
Remote Field Testing (RFT)
Two coils are utilized in RFT: the driver coil (also known as the transmit coil) and the pickup coil. A low-frequency AC signal is used to excite the driver coil, and the pickup coil is given a signal which is the vector sum of a small RFT signal that comes from the tube wall, and a direct coupled signal from the diver coil.
Applications
Regular inspection of storage tanks ensures that the walls and bottom plates are sound, as tank floor plates are susceptible to corrosion from the soil beneath them, increasing the risk of hazardous chemical contamination. Using MFL allows for maximum area coverage in a short period so that any indication that exceeds the threshold is verified by the ultrasonic straight beam.
Applications
Used in the bottom plate of tanks.