Testing
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OCA Global always provides customised solutions. We can guide our customers throughout their projects, offering the highest level of technical assurance, reducing risks and unproductiveness through a series of tests and offering an objective overview of the status of their assets.
We count on the latest inspection technology and a team of qualified and certified professionals able to carry out inspections according to any type of specifications, laws, standards or international clients. This means that our clients save on maintenance costs, improve the quality of their production and are able to guarantee the reliability and safety of their operating procedures.
Non-Destructive Testing (NDT)
Penetrating liquids are one of the most widespread, simple and effective non-destructive tests. These liquids help detect defects and imperfections on the surface of the components on in-service inspections and fabrication processes that are not perceptible in a visual inspection. This technique can be applied to any surface of a non-porous material. The test is performed applying a penetrant liquid on the surface of the material, which will penetrate the imperfections in the piece. The excess liquid on the surface is removed afterwards so that it only remains on the imperfections, showing their exact location on the piece.
In OCA Global we use several liquid penetrant testing methods to detect internal defects or cracks from the surface. In order to do so, liquids with red or fluorescent ink (process carried out in a black light environment to ensure the detection of the finest fatigue cracks) are used, as well as other types of liquids and dry developers.
Within the field of application of penetrating liquids, whose objective is the detection of discontinuities such as cracks, plies, pores, etc., in the surface of metallic materials welded joints, or in the surface of non-metallic materials, always with the condition that they are inert to the test products and that they are not excessively porous.
Applicable regulations
ASME CODE
Test performance
Section V
Indication assessment
Section VII Division 1
STANDARDS
Test performance
UNE 141612
UNE-EN 571-1
Indication assessment
UNE-EN 571-1
Indication assessment
UNE-EN 1289
UNE-EN 1289/1M
UNE-EN 1289/A2
UNE-EN-ISO 5817
The purpose of these inspections is to establish the operating method and the acceptance criteria for magnetic particle tests in welds to detect defects or discontinuities in the surface or subsurface – such as fissures, folds, blowholes or imperfections.
The highest sensitivity when performing this test is obtained in surface discontinuities and it decreases rapidly as the depth of the discontinuity increases.
This method is applicable only in ferromagnetic materials, using the technique of electromagnetic yokes and using visible colour or fluorescent magnetic particles.
This test can be performed on components with certain coatings and on samples of large or small size, and the results are obtained immediately.
Applicable regulations
ASME CODE
Test performance
Section V
Indication assessment
Section VIII Division 1
STANDARDS
Test performance
UNE 1290
UNE-EN 1290/1M
Indication assessment
UNE-EN 1291
UNE-EN 1290/1M
UNE-EN 1291/A2
UNE-EN-ISO 5817
These inspections are established with the operating method and the acceptance criteria to test welded steel structures using X-ray or radiographs.
This method is applicable to the radiographic testing of chamfered welded joints, with complete penetration in sheets and structural and tubular profiles using scintigraphic sources.
We can also find inspections of welded joints carried out using the radiographic method, which is intended to describe the test method and the evaluation criteria to test welds in oil storage tanks through radiographic tests. The radiographic test is required for welding in:
- The body (ferrules) of the tank.
- Annual plates of the bottom of the tank.
- Tank manhole.
The plates will be considered of the same thickness if the difference of their nominal thickness does not exceed 3 mm.
Radiographic tests are a non-destructive testing method used to test and inspect different materials without causing any damage or alteration in the piece and its materials. In these tests, the radiation of X-ray or gamma equipment is absorbed by the material, allowing to observe the interior of objects and assessing whether there is corrosion, erosion, defects or foreign objects that endanger its operation and use.
Applicable regulations
ASME CODE
Test performance
Section V
STANDARDS
Test performance
UNE 1290
UNE-EN 1290/1M
Indication assessment
UNE-EN 1291
UNE-EN 1290/1M
UNE-EN 1291/A2
UNE-EN-ISO 5817
Ultrasounds are sounds produced by mechanical vibrations that have a frequency above audible level. Like sounds, ultrasounds travel through a medium with a defined speed and in the form waves, but, unlike electromagnetic waves, the sound wave is a mechanical disturbance of the medium through which energy is transported.
Ultrasonic tests use high frequency sound energy to examine the quality and integrity of the components and welds, allowing to find internal discontinuities in the materials, defects in a piece, welding or metal sheet as well as, for example, to determine its thickness.
Ultrasonic testing can be especially useful when facing access, temperature, coating or type of material and components problems. Our team is able to perform this type of inspection quickly and accurately. Some of the specific areas where we can apply this method are: pipes and ducts, pressure vessels, power plants, storage tanks, and railways.
The welded joints ultrasonic testing method intended for the construction of metallic steel structures subjected to static loads (buildings) or dynamic loads (bridges), is applicable to the ultrasonic test of the seam annealing and thermally affected zone (ZAT) of chamfer welds with a thickness of 8 to 200 mm, both included.
If the thickness is lower than 8 mm or higher than 200 mm, the test may be carried out in accordance with Annex S of AWS D1.1, upon approval of the contractor or engineering company.
Applicable regulations
ASME CODE
Test performance
Section V
STANDARDS
Test performance
UNE 1290
UNE-EN 1290/1M
Indication assessment
UNE-EN 1291
UNE-EN 1290/1M
UNE-EN 1291/A2
UNE-EN-ISO 5817
