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.

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

Ultrasonic flaw detection

What is an ultrasonic flaw detection? Why is it popular?

Ultrasonic flaw detection is one of the NDT key methods. It allows to evaluate the reliability of welded structures.

Advantages and reasons of ultrasonic testing

This method is aimed at control of the welding quality, which influences directly on the work resource of pipelines, pillars, equipment, etc. Non-destructive testing is performed to prevent implementation of constructions having intolerable flaws in welded joints. In Western Europe and North America, the cost of technical diagnostics reaches 10-12% of the total project cost. It is better, cheaper and easier to detect the weak elements than pay for expensive repair process or liquidate the consequences of emergency situations.

This testing technology has a lot of advantages:

cautious impact on the testing material without its damage
precise and reliable data about actual object condition
high rate diagnostics
low testing cost
portable equipment, possibility of diagnostics in the field
absolute safety for the staff

Physical and mechanical testing basis

The ultrasonic flaw detection is a group of methods. These methods are similar in penetration using of elastic waves of ultrasonic testing frequency band. The key point of the method is that the trajectory of sonic waves does not change in a homogeneous material. If they come across any obstacles (for example, foreign bodies, or layering) characterized by different acoustic resistance, the waves are reflected from interface. Special devices which register these reflections are flaw detections.

Ultrasonic testing is performed to detect defects, including very small, as well as to determine their origin. Based on this information, the appropriate method is chosen to eliminate them.

What is the equipment for ultrasonic testing?

Modern flaw detections are popular and effective because of their powerful functionality. They can be set to a certain frequency to detect a wide range of defects. In most devices, it is possible to use several methods of ultrasonic testing, such as:

shadow method
delta method
mirror-shadow method
echo method
mirror method

The combination of different measurement technologies makes testing more accurate and reliable. The operator receives the maximum amount of information for the assessment of defects and details compliance with regulatory requirements.

In recent years, flaw detectors working with the support of phased arrays are the most widespread. Their main advantage is that they allow to obtain 3D-images of defects in the material.

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.