Visual and measurement testing is performed to obtain initial information about the object under inspection (VMT). VMT is directed at testing of blank parts quality for melding and also evaluation of welded joints quality. External expertise is an integral part of technical diagnostics. It is performed not depending on using other DNT methods.

Ultrasonic testing- Based on the use of elastic vibrations mainly ultrasonic frequencies. Basic methods: shadow, resonance, impedance, free oscillations, ehometod...

Control penetrant- based on the use of elastic vibrations mainly ultrasonic frequencies. Basic methods: shadow, resonance, impedance, free oscillations, ehometod...

Ultrasonic thickness- Based on the use of elastic vibrations mainly ultrasonic frequencies. Basic methods: shadow, resonance, impedance, free oscillations, ehometod...

Mechanical testing of materials- Based on the use of elastic vibrations mainly ultrasonic frequencies. Basic methods: shadow, resonance, impedance, free oscillations, ehometod...

Basic by realization of thermal imaging testing is creation of apparatus facilities, providing transformation of the temperature distributing or infrared to the visible image. Realization of possibilities of thermal imaging testing, providing both the exposure of internal defects in different objects and effective decision of problem of «nightly vision», findings out the hidden or disguised objects or realization of searching measures are in difficult weather terms, stipulated creation of wide spectrum of thermal-imaging of apparatus facilities: portable, mobile, stationary.

Magnetic coating thickness gauge MT-2007 is designed to measure thickness of paint and lacquer, electroplating, fire-retardant, and any other non-magnetic current conducting and non-conducting coatings on ferromagnetic (steel, cast iron etc.) foundations.

Magnetic particle testing (MPT) is high on the list in the system of non-destructive testing methods. This is due to its high-speed response to surface and subsurface defects, simplicity, flexibility and clear presentation of testing results.

The vacuum-bubble testing method allows to detect penetraion defects. When testing by this method, a vacuum chamber is installed on the side of the test section of the welded joint moistened with indicator solution, and negative pressure is generated in a chamber. Due to the generated differential pressure, atmospheric air penetrates through-and-through defects, causing their bubble indication.

Spark testing method is a method of electrical non-destructive testing based on recording electricalbreakdowns and (or) changes in the parameters of the test item in the environment or at the section.

Вихретоковый контроль – метод неразрушающего контроля для проверки изделий из токопроводящих материалов на наличие поверхностных дефектов (трещин, волосовин, закатов, надрывов и др.), основанный на взаимодействии внешнего электромагнитного поля с электромагнитным полем вихревых токов, наводимых в объекте контроля этим полем.

Спектральный анализ широко используется в различных отраслях промышленности и науки, и служит универсальным инструментом, который позволяет точно и оперативно исследовать элементный состав вещества. Эта информация необходима для правильного ведения технологических процессов, контроля качества исходных материалов, промежуточного и готового продуктов, а также позволяет создавать новые материалы с заданными качествами.

Металлографический метод контроля – это комплекс испытаний и аналитических мероприятий, направленный на изучение макроструктуры и микроструктуры металлов, исследование закономерности образования структуры и зависимостей влияния структуры на механические, физико – механические и другие свойства металла.

Адгезия – это устойчивость к отслаиванию однослойного или многослойного антикоррозионного покрытия к окрашиваемой поверхности и/или между слоями. Поэтому при монтажных работах по устройству изоляции проводится контроль адгезии, изучается вопрос о соответствии изоляционного покрытия с типом трубопровода и климатом, в котором будет проложена магистраль. Несоответствие может повлечь тепловые потери, ранний износ труб, что потребует дополнительных экономических вложений.

Гидравлическое испытание — необходимая процедура, свидетельствующая о надёжности оборудования и трубопроводов, работающих под давлением, в течение всего срока их службы, что крайне важно, учитывая серьёзную опасность для жизни и здоровья людей в случае их неисправностей и аварий

Под термином «электробезопасность» понимается система организационных и технических мероприятий и средств, обеспечивающих защиту людей от вредного и опасного воздействия электрического тока, электрической дуги, электромагнитного поля и статического электричества. Одним из мероприятий является проведение контроля электробезопасности электроприборов.

Контроль за состоянием лестниц заключается в периодической проверке прочности их несущих элементов, узлов сопряжения лестниц

Methods of nondestructive testing

Radiographic testing

The technical capabilities of the radiographic testing

Radiographic testing is one of the most informative and reliable DNT methods. This method is overall used for diagnostic such facilities as pipelines of various diameters, metal constructions, technological equipment, products made from composites and so on. Technical equipment of “ARDCON” company includes X-ray machines RAYCRAFT; they are portable, safe and resistant to heavy field conditions.

Description and functions of the method

Radiographic testing is based on the use of X-ray penetrating power. Penetrating through the material, it has an impact on the photosensitive layer of the film, which is fixed on the back side of the welded joint. Rays are absorbed worse and increasingly affect the sensitive layer of the film in defective areas. At the end of testing, film is displayed. Decoding is performed using negatoscope (x-ray view box). Identified defects are clearly visible on the finished image, which makes it possible to register them and describe in details.

Radiographic testing can detect a variety of defects, such as:

poor penetration
pores
tungsten, slag, oxide and other alien inclusions
undercuts
holes
cracks

According to the prints, it is possible to estimate the convexity and concavity of the root; it is very practical, especially having limited access to it. X-ray film is selected in accordance with the technical requirements. In official regulations governing the control and inspection of welded joints, there are such parameters as:

distance between the radiation source and the testing product;
X-ray tube voltage;
the use of metallic or fluorescent screens;
dependence on the thickness of the material;

Advantages of radiographic testing

1. Detecting defects which are inaccessible to other NDT technologies (poor penetration, holes, etc.).

2. The exact localization of defects. Due to this advantage, the speed of the repair work increases significantly.

3. High reliability of testing, visual determination of the defects types and the amount of convexity and concavity of the stringer beads.

4. Archiving prints for re-analysis.

5. Automated interpretation of X-rays. It concerns modern hardware and software concepts, which are presented in our catalog.

6. Wide range of the use. This method is suitable for technical diagnostics of various facilities, such as pipelines, reservoirs, tanks, metal constructions, etc.

LLP «ARDCON» offers services of welding and metal testing laboratory. The laboratory is certified to the following control methods: radiographic testing, ultrasonic flaw detection, ultrasonic thickness measurement, metal hardness measurement, liquid penetrant testing, magnetic particle inspection and other NDT methods. For consultation, a potential customer can contact with our technical specialists and discuss the questions.