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NON-DESTRUCTIVE TEST (NDT)

NON-DESTRUCTIVE TEST (NDT)
Non-Destructive Test ensures that the inner and outer fugacities of materials are detected without harming the material to be examined or its integrity.

Unnecessary repair, change etc. costs are prevented with non-destructive test methods. It makes products more valuable, gives confidence to the purchaser and the seller contributing to reduction of risks.

Implementations are made according to TS EN ISO 9712 and SNT-TC 1A by our certified Level 2 and 3 nondestructive test experts.

Nondestructive test methods;
• Visual Test (VT)
• Magnetic Particle Test (MT)
• Liquid Penetrant (PT)
• Radiographic Test (RT)
• Ultrasound Test (UT)

Visual Test (VT);
Visual Test is testing of parameters such as fugacities, structural disorders, surface condition etc. on the surface of a product, which affect quality, with or without the help of an optical tool (magnifier, endoscope, videoscope etc.). Generally, inspection is made mechanically and optically in the visual test.

Although visual testing can be considered a simple method, it is the most important testing method. Generally, it is necessary work before implementation of another nondestructive testing method. Most of the implementation standards prepared for other nondestructive testing methods require primarily visual test and recording of findings.

Standards: AD Merkblatt HP 5/3, ASME Sec. I, ASME Sec. V, ASME Sec. VIII, ASME B31.1, ASME B31.3, ASME B31.4, ASME B31.8, API 5L, API 650, API653, API 1104, AWSD.1.1, TS EN ISO 5817, TS EN ISO 17637, TS EN 13018, TS EN ISO 17635

Magnetic Particle Test (MT):
The principle of the testing method with magnetic particle; is formation of fault current flow in the fugacities on the material’s surface by magnetizing ferromagnetic (iron, cobalt, nickel etc.) materials, and gathering on the fugacities of the iron powders sprayed on the surface of the material The indications thus formed are examined to evaluate fugacities on and immediately under the surface.

 
Standards: AD Merkblatt HP 5/3, ASME Sec. I, ASME Sec. V, ASME Sec. VIII, ASME B31.1, ASME B31.3, ASME B31.4, ASME B31.8, API 5L, API 650, API 653, API 1104, AWS D1.1, TS EN ISO 5817, TS EN ISO 17638, TS EN ISO 23278, TS EN ISO 10893-5, TS EN ISO 9934-1, TS EN 10228-1, TS EN 1369, TS EN ISO 17635

Liquid Penetrant (PT):
Liquid penetrant method is a nondestructive testing method where fugacities to the surface of the material are made visible.

The principle of penetrant test is based on penetration of the penetrant, a liquid, into the flaws to the surface of the material.

Standards: AD Merkblatt HP 5/3, ASME Sec. I, ASME Sec. V, ASME Sec. VIII, ASME B31.1, ASME B31.3, ASME B31.4, ASME B31.8, API 5L, API 1104, API 650, API 653, AWS D.1.1, TS EN ISO 5817, TS EN ISO 3452-1, TS EN ISO 23277, TS EN 1371-1, TS EN 1371-2, TS EN 10228-2, TS EN ISO 17635, TS EN ISO 10893-4

Radiographic Test (RT):
Radiographic testing method is one of the most common nondestructive testing methods in industry because it is a quite delicate test method and its test results are permanently recordable.

High energy elektromagnetic waves (radiation) can influence, when they penetrate into the material on the other side, films sensitive to radiation. When these films are exposed to developing process later, the image of the inner side of the material which the radiation passes through shall appear. The image is formed due to cavities inside the material or changes in thickness / intensity. Such imaging of inside the material is called radiography. If a detector is placed behind the material instead of film and the radiation from the material is collected to be transferred to a monitor, that is called radioscopy.

Radiographic test is a method used for determination of volumetric and planary flaws expected in all materials, whether or not metallic.

Standards: AD Merkblatt HP 5/3, ASME Sec. I, ASME Sec. V, ASME Sec. VIII, ASME B31.1, ASME B31.3, ASME B31.8, ASME B31.4, API 5L, API 650, API 653, API 1104, AWS D1.1, TS EN ISO 5579, TS EN ISO 17636-1, TS EN 12681, TS EN ISO 5817, TS EN ISO 10675, TS EN ISO 17635, TS EN ISO 10893-6, TS EN ISO 10042

Ultrasound Test (UT):
It is an effective method in controlling fugacities within the material using high-frequency sound waves.

The high-frequency sound waves sent within the material reflect if they come across an obstacle on the path of the sound. The signal reflecting based on the angle of impact may or may not be received by the receiver (probe). Sound waves reaching the probe are transformed into electrical signals and turn into echoes on the device screen. The distance (depth) and size of fugacity can be found out in view of those echoes.

Since only a single surface of the material is necessary in the test method, use of only a single probe is adequate.

In addition to error detection;
• Thickness measurement,
• Material classification can be made.

Standards: AD Merkblatt HP 5/3, ASME Sec. I, ASME Sec. V, ASME Sec. VIII, ASME B31.1, ASME B31.3, ASME B31.8, API 5L, API 650, API 653, API 1104, AWSD1.1, TS EN ISO 5817, TS EN ISO 11666, TS EN ISO 23279, TS EN ISO 17640, TS EN 12680, TS EN 10228-3, TS EN 10228-4, TS EN 14127, TS EN 10308, TS EN 10160, TS EN ISO 16810, TS EN ISO 17635

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