Internal rotary inspection system iris iris is an ultrasonic method used for the nondestructive testing of pipes and tubes. Many plant operators in the oil, gas and power generation industries are faced. Introduction ultrasonic ut testing of different tubes is a commonly used method of inspection. Eddy current testing inspection ec is a highlyversatile branch of nondestructive testing ndt that is sensitive to small cracks and is able to detect surface and nearsurface defects since eddy current ec equipment is often portable, immediate results are available and minimum part preparation is required. After the tubes are cleaned each tube is then flooded with. Tube inspection internal inspection rotary system iris. For example, whereas the utilization of iris and laser require a high degree of tube cleanliness, et, rft. The tube pitch center to center distance of adjoining tubes is typically a minimum of 1.
Sample patterns are typically used with larger hxs. Subsequently, inspection of the remaining heat exchanger tubes is limited to internal tube inspection. Various techniques and inspection systems are employed for tube examination. Optimizing boiler generating bank tube reliability through. See dcn for details rev date dcn number current revision e 2018.
Iris technology overview of iris principles youtube. Jency eddy current and ultrasonic iris tube col contactor inlet trim cooler, located on the 20th 09201 1 414 legs inspection supervisor alen ennis f 3. Finfan iris internal rotary ut excellent resolution, cscan imagery, and defect sizing capabilities. Ndt is also commonly referred to as nondestructive examination nde. Local defects and wall loss on both sides of the tube can be accurately measured. However, sometimes there are serious problems with complex delivery system and ut inspection time because. Nonferromagnetic aluminum brass copper hastelloy incoloy. Nde technologies for the examination of heat exchangers.
This approach means inspection of the shell can take place without the need to remove the tube bundle. This technology takes a common, blinded procedure in a new and innovative direction, supporting nurse placement at the bedside. Nde technologies for the examination of heat exchangers and boiler tubes principles, advantages and limitations. Iris is used to detect erosion, corrosion and baffle wear in heat exchangers. Internal rotary inspection system iris is an ultrasonic method for the nondestructive testing of pipes and tubes. Other relevant international agreements and instruments 35. Iris inspection is more accurate than other tube inspection techniques and has the advantage of presenting information about the geometry of defects. Typically, 1012 tubes can be inspected per hour, dependant on tube length. We deliver effective nonintrusive inspection nii for heat exchanger vessels and apply this approach widely to the shell side.
Inserting the tube into the socket more than the minimum distance required by the brazing procedure specification bps does not increase to the strength of the joint. These probes are used for ferromagnetic or nonferromagnetic tube inspection applications. Displays the location of the probe in the tube additional vga monitor and printer can be connected ut instrument. The kangaroo tm feeding tube with iris technology is the first disposable feeding tube with a camera to visually aid in the placement of smallbore feeding tubes. Comments to inspection iris inspection was requested by the client, for the examination of this tube bundle. Internal rotary inspection system iris ultrasonic inspections of heat exchanger tubes. Nfa to inspect the id of carbon steel finfan tubes.
Tube inspection internal inspection rotary system iris tube inspection internal inspection rotary system iris. Thorough internal tube cleaning is essential to obtain clear reliable results. Tube testing multi technology system eddy current, remote field testing, iris ultrasonics, magnetic flux leakage no single inspection technique is adequate for all types of materials and a single system may only be used for a narrow range of applications. Heat exchanger tube inspection is vital for refining and petrochemicals. Many plant operators in the oil, gas and power generation industries are faced with the challenges of maximising the efficiency and life expectancy of their assets but without sacrificing safety and reliability. Inspection procedure for shell and tube heat exchangers printed. The advanced heat exchanger tube inspection using mfl magnetic flux leakage, offers. Iris requires the tubes to be thoroughly cleaned for ultrasonic coupling. Iris inspection is more accurate than other tube inspection techniques and has the advantages of presenting information about the geometry of defects. Concrete pedestals, foundations, skirt fire proofing should be examined for cracks, chips, spalling, or deterioration. Tubes can be inspected periodically to detect and size discontinuities e. Iris tube testing is powerful but complex, sensitive to pull speed and centering, and is of limited effectiveness in thinwalled tubes. Multitechnology system that offers eddy current, magnetic flux leakage, remote filed and iris ultrasound technologies. The iris probe is inserted into a tube that is flooded with water, and the probe is pulled out slowly as the data is.
The eddy current ec technique is a commonly utilised to inspect nonferromagnetic materials. Nearfield array nfa probes sizing small volumetric defects in finfan air coolers duration. Overview of nondestructive testing ndt inspectioneering. Overview of steam generator tubeinspection technology. Ultrasound is reflected from the tube id and od and the time difference is used to calculate the thickness. To inspection tube bundles for the purpose of improved reliability, reduce operating costs, prevent costly repairs, and unscheduled downtime due to heat exchanger tube bundle failures. Highperformance iris testing of heat exchanger tubes eddyfi. As shown in the above illustration, a sound beam is emitted from an ultrasonic transducer. Because iris is an ultrasonic technique, it requires a couplant. Iris internal rotating inspection system technique principles of the iris inspection technique for tube inspection a beam from an ultrasonic transducer is reflected from a mirror set at 45 degrees so that the reflected ultrasonic beam impinges on the tube.
Tubes under test must therefore first be flooded to use this technique. Rft, nearfield testing nft, nearfield array nfa, an internal rotary inspection system iris, magnetic flux leakage mfl, partial saturation eddy currents psec, or a combination of any of these or other inspection techniques. All tubes were recorded to disk with manual on screen analysis. Local defects and wallloss on both sides of the tube can be accurately measured. Iris is a great backup and verification tool for the other tube inspection techniques. Overview of steam generator tubeinspection technology l. The lens focuses light onto the retina, which contains very many lightsensitive receptor cells called rods and cones that operate using a photochemical process to convert incident light into. For shell and tube type heat exchangers, tube to tube sheet joints shall be tested for tightness with air in the shell side, unless otherwise. Iris is a technique based around the principle of ultrasonic inspection.
Eddy current, remote field testing, iris ultrasonics. Did you know irisndt edmonton offers irataapproved training in all levels. Internal rotary inspection system iris ultrasonic test method is employed for testing of pipes and tubes in boilers, heat exchangers and finfan tubes. Project standards and specifications page 8 of 20 rev. Heat exchanger tubes are often scanned using one inspection technique, and then reinspected with another to confirm the remaining wall thickness. Eddy current inspection procedures and specification 2014 page 1 of 4. Eye education for emergency clinicians 2 these presentations have been prepared by. Iris is more accurate than other tube inspection techniques and has the advantage of presenting. Nondestructive testing ndt consists of a variety of noninvasive inspection techniques used to evaluate material properties, components, or entire process units. It is used to inspect boilers, and fin fan cooler tubes.
Lmats offers the latest advanced heat exchanger tube testing and inspection using mfl magnetic flux leakage to assess the integrity of your heat exchange tubes thus maximising production and the life of your heat exchangers. Iris internal rotating inspection system technique principles of the iris inspection technique for tube inspection a beam from an ultrasonic transducer is reflected from a mirror set at 45 degrees so that the reflected ultrasonic beam impinges on the tube i. Tubes need to be kept extra clean and full of water during the inspection. A leaking tube can impact production, the environment and most importantly, lives. With iris, the remaining wall thickness of tubes can be accurately measured.
The iris display includes the crosssection of the tube and a c. Westech technicians are qualified and certified in accordance with the snttc1a guidelines and can provide onsite or inhouse data interpretation. With iris the remaining wall thickness of tubes can be accurately measured. Measures and operational procedures for ship inspection and the issue of ship sanitation certi cates 26 4. Iris testing uses an ultrasonic beam scanned around the tube id by a water driven turbine probe assembly as illustrated below. Designed uniquely and installed in the main unit up to 70 report forms in english can be stored and printed vision seescan cscan and report software version 4. Iris is an ultrasonic method used for the nondestructive testing of pipes and tubes. Inspection procedure the inspection was performed according to the following valid procedure. Rft inspections should be followed by iris inspection if shallow pits or general thinning is suspected. Eye examination eye education for emergency clinicians education session two. Iris is an ultrasonic pulseecho immersion technique for the internal inspection of tubes and pipes. Tube tech restores convection section at petrochemical plant in bangkok. Sonomatic provides a range of inspection and integrity services for heat exchangers and tubing.
Following data compares the performance of eddy current testing ect and ultrasonic iris for inspection of heat exchanger tubes. Internal rotary inspection system iris ultrasonic inspections of. Iris relies on a transducer to generate an ultrasonic pulse parallel to the axis of the tube under test. The iris probe is inserted into a tube that is flooded with water, and the probe is pulled out slowly as the data is displayed and recorded. Inspection procedure for shell and tube heat exchangers. The tube pitch usually limits external inspection access to the accessible outer tubes of a tube bundle. Both techniques have their advantages and limitations. Tube inspection oceaneering asset integrity provides a range of systems to inspect tubes in heat exchangers, air coolers, feed water heaters, condensers, and similar items using a selection of inspection techniques. The techniques can also be utilized to detect, characterize, or measure the presence of damage mechanisms e. Iris testing method non destructive internal rotary inspection system iris testing is an ultrasonic test system used generally fo r the measurement of heat exchanger and steam generator tubes and pipe lines fo r measurement of wall thinning and pitting. The iris method is mostly used for inspection of carbon steel tubes and is sometimes used in nonferromagnetic tubes for defect verification. Eye examination nsw agency for clinical innovation. Handbook for inspection of ships and issuance of ship. Defect position can be located in relation to tube length.
Choosing the appropriate inspection method for your equipment depends on your tube material and specific inspection. Iris can be applied on both ferrous and nonferrous materials, although predominately iris is used on ferrous tubes and eddy current for other types. Shell and tube heat exchanger inspection in manufacturing shop the construction code for shell and tube heat exchangers is asme code section viii, and it covers the minimum requirements for design, materials, fabrication, inspection. Quality procedure qp158 thread inspection procedure owner. The method is very accurate for thickness measurement as well as detecting id and od pits. It also relies on a rotating mirror that directs the ultrasonic wave into the tube. An introduction to ndt common methods 5 this process is called accommodation and gives us very fast continuous focusing adjustment. After data acquisition and analysis are complete, a comprehensive report with a color coded tube sheet map will be. A ms5800 multi function ndt system was used to affect the inspection. Iris data to be presented as a b, c, or dscan image.