techniques: CONVENTIONAL RADIOGRAPHY
SCI SA has in most of its offices a radioactive facility with one or more bunkers for radiography of components to perform the work more securely and efficiently. Shielded enclosures are designed to be used with Ir192, Se75, Co60 isotopes and X-ray, with the possibility of installing modular bunkers in the customer premises.
The main types of conventional X-ray and gamma ray equipment are as follows:
- Mobile gamma cameras for use in field or bunker with up to 150 Ci of Ir-192 or 100 Ci Se-75. Suitable to radiograph thickness up to 100 mm of steel.
- Fixed gamma cameras for use in bunker with up to 100 Ci of Co-60. Suitable to radiograph thickness up to 180 mm of steel.
- Portable X-ray equipment for use in bunker up to 360 kV valid for up to 60 mm of steel.
- Fixed X-ray equipment constant potential for use in bunker up to 450 kV valid for up to 80 mm steel thickness.
- 6 MeV linear accelerator for use in bunker suitable for thickness up to 300 mm of steel.
techniques: PENETRANT TESTING
SCI SA has portable liquid penetrant inspection systems, for both colored and fluorescent inspections as well as fixed installations for processing series of components.
techniques: MAGNETIC PARTICLE
SCI SA has fixed and portable magnetic particle inspection equipment (colored or fluorescent).
- - Prod systems up to 2000 A
- - Inspection systems for central conductor and coil
- - Portable yokes AC and DC
techniques: RADIOGRAPHY WITH LINEAR ACCELERATOR
SCI has a 6 MeV linear accelerator at its facilities in Beasain (Guipúzcoa), exclusively for the radiographic inspection of components, becoming the first Spanish company specialized in providing inspection services to its clients able to X-ray steel thickness up to 300 mm, well beyond the capabilities of other techniques such as the use of of Co60 isotopes.
A linear accelerator is basically a device which produces the acceleration of an electron beam that hits a target of tungsten. The deceleration of the electron beam causes the emission of highly energetic X-rays in the order of several MeV.
The advantages of a linear accelerator are among others:
- A highly energetic X-ray beam (6 MeV) capable to X-ray up to 300 mm of steel.
- Very small Focal sizes (less than 2 mm) which produce high-definition images.
- Very high productivity, since the exposure times are very short.
- Possibility of using long focus film distances which means less geometric distortion of the image and high sensitivity.
- Possibility of using fine grain films maintaining short exposure times.
- Little generation of scatter radiation due to the high beam energy, which means high image quality.
techniques: DIGITAL RADIOGRAPHY
Digital radiography is an alternative to conventional radiography where the radiographic film is replaced by a reading sensor which provides a digitized radiographic image.
The quality and sensitivity of the image obtained is equivalent to that of conventional radiography.
Digital radiography has significant advantages over conventional radiography:
- The image processing software enables applications such as pipe thickness measurement in petrochemical plants under heat insulation without removing it.
- There is no need to use developing chemicals and darkroom.
- The interpretation of the radiographic image can be done immediately
- Easy archiving of radiographic images in digital format.
techniques: DIGITAL SCANNING
SCI SA has a service for scanning conventional radiography.
The scanning of films is done with very high resolution scanners. The images obtained are similar to the ones obtained by conventional digital radiography.
The resolution and quality of the image is similar to the original film that has been digitized.
techniques: INSPECTION OF COATING OF BURIED PIPES
SCI SA has equipment for the inspection of the coating of buried pipes
This technique is based on circulating an electric current through the buried pipe, being able to detect those points where, due to the absence of coating the current is derived to ground.
The detection of defects in the coating is done while walking along the pipeline path. The equipment carried by the inspector is able to detect the points where the coating is damaged.
This inspection is commonly used to verify if the coating of the pipe has been damaged while it has been buried during construction or as a periodic inspection during in-service operation.
Additionally, this technique can determine the location and depth at which the pipeline runs.
techniques: OTHER NON DESTRUCTIVE TESTING
- Coating Thickness Measurements
- Paint adhesion
- Positive materials identification by X-ray fluorescence
- Visual Inspection
techniques: AUTOMATIC RADIOGRAPHIC INSPECTION
Radiographic inspection in pipelines is one of our main activities.
SCI offers a complete range of automated equipment (over 50 crawlers) for pipe diameters from 6" to 60", both Ir-192 and X-ray
These equipment are designed and manufactured by our R & D department.
Our experience exceeds over 30,000 km of pipeline inspected worldwide.
SCI has the following equipment and materials:
- Qualified technicians (ASNT, EN-473)
- X-ray crawlers with internal combustion engines and batteries.
- Gamma-ray crawlers with gamma cameras with up to 100 Ci Iridium 192
- Manual X-ray and Gamma-ray equipment (Ir-192, Co-60 Se-75).
- Mobile laboratories and offices.
- Automatic processors.
techniques: AUTOMATIC ULTRASONIC INSPECTION
At the beginning of the 90's automatic ultrasonic inspection (AUT) started to be used in the control of circumferential welds in pipelines in lieu of radiography, which until then had been the main volumetric test method.
The technique of automatic ultrasonic inspection is to divide the profile of the weld in different areas associated with each potential defect that may occur. Afterwards we select focused ultrasonic transducers in the specific areas where we expect to find these defects and with an angle of incidence perpendicular to its surface. Thus, using a sensor for each zone, it is possible to inspect the full weld in one turn of the scanner and cover the entire volume of it.
This technique involves, therefore, the simultaneous use of a large number of ultrasonic sensors, requiring a scanner and a data acquisition system capable of storing all that information in real time.
The test is performed by dividing the welding areas and using for each one a specific probe with an angle perpendicular to the surface of the reflector and the focus closer to the distance from it.
This method involves using a probe for each area, varying in amount according to the profile of the weld and the thickness. The set moves through a scanner, in circumferential direction and keeping the distance constant with respect to the centerline of the weld.
Currently with the use of Phased Array technology this type of inspection has advanced considerably both in the method of working and in the performance of the inspection.
The Phased Array System is based on using multiple transducers with glass and by selecting a set of them and applying the appropriate delays in the different crystals, we can get different angles and focus. In pipeline inspection we needed before several probes to cover all areas. Now we need only one probe wich can be configured in different ways, so in one pass can inspect the full weld volume.
The advantages of this new technique is compared to the multiprobe AUT can be summarized on the following points:
- Decrease in the number of probes and thus using a much smaller scanner, helping the implementation of the inspection. This smaller size allows greater portability.
- The change in thickness and shape of the bevel need only to load a new calibration in the system without changing the physical position of the probes and therefore saving time.
- We can increase the number of areas and, consequently, increase the accuracy in sizing the defects without increasing the number of transducers.
SCI has developed the system PipeSyscanPA that allows the inspection of the line, repairs, tie-ins, etc ... covering all the requirements of pipeline inspection.
SCI has the UNE EN ISO 9100 certification in aeronautic nondestructive testing and NADCAP accreditation in several of their offices.
Among others, our customers are:
- AIRBUS MILITARY
- ROLLS ROYCE
- SENECMA, etc
Aeronautical inspections are performed by qualified personnel in accordance with the standard NAS 410/EN-4179 level II and III in different techniques
Our experience in this field has enabled us to offer technical advice and Level III services to other manufacturers and suppliers in the aeronautical sector when implementing their non-destructive testing processes.
sectors: STORAGE TANKS
Inspection and certification of tanks with API 653 inspectors.
Tank bottom inspections by magnetic flux leakage technique, which allows a fast and reliable inspection of tank floors identifying the areas which have suffered significant losses of thickness due to corrosion.
Tanks and storage tanks, mostly built in carbon steel, suffer thickness losses over time due to corrosion processes that are originated by presence of water or other corrosive elements present in the stored liquid itself. To prevent leakage of fuel its necessary to have regular tests to measure wall thickness, in order to determine the remaining life of the tank or the need to replace the parts most affected during maintenance processes.
The e-SyscanPa has been developed for measuring thickness and obtain erosion-corrosion maps on big components. Designed starting on the Syscan it has the same characteristics concerning versatility, case of use and graphic presentation of the results.
Main references in LNG tank inspection
sectors: HEAVY INDUSTRY/FOUNDRIES/STRUCTURES
SCI currently has over 20 branches where they are making permanently non-destructive testing in this sector.
Therefore, and in order to meet the needs of customers anywhere S.C.I., has in each of these sites a permanent radioactive facility.
Each radioactive facility normally has one or more bunkers for radiography of components to perform the work more securely and efficiently. Shielded enclosures are designed to be used with Ir192, Se75, Co60 isotopes and X-ray, with the possibility of installing modular bunkers in the customer premises.
SCI has a 6 MeV linear accelerator at its facilities in Beasain (Guipúzcoa), exclusively for the radiographic inspection of components, becoming the first Spanish company specialized in providing inspection services to its clients able to X-ray steel thickness up to 300 mm, well beyond the capabilities of other techniques such as the use of Co60 isotopes...
SCI has extensive experience in testing components according to the most common industry standards in the field of piping or pressure vessels (ASME, EN, DIN, CODETI...) structures (AWS, EN ,...) nuclear components (ASME, RCCM, DIN etc ,...),
Non-destructive tests are performed by qualified personnel according to EN-473, ISO 9712, SNT-TC-1A.
SCI SA is accredited by DET NORSKE VERITAS (Certification Ref: CDZ-11-2527) for thickness measurement in ship structures.
SCI SA has a wide experience, as well as equipment and qualified personnel to perform NDT on ships, both during construction or maintenance.
The pipelines are used to transport gases and liquids over long distances, playing an important role in the development of world economy.
The pipelines are circumferentially welded steel pipes during construction in the field. Once inspected are coated to protect from moisture and are finally buried.
During the welding process can produce a wide variety of defects such as lack of penetration pores, slag, lack of fusion, etc. ..., which are important to detect the highest reliability in order to ensure quality of the conduit.
The welds are inspected using non-destructive testing using x-ray or ultrasound. In either case, SCI has developed techniques, equipment and procedures to ensure the reliability and repeatability of the test.
Main references in pipeline inspection (AUT)
Main references in pipeline inspection (RT)