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

Liquid penetrant testing

What is a uniqueness of the penetrant testing?

Penetrant testing is based on special liquids ability to penetrate into the defects. The resulting contrast image allows to evaluate the state of material. Using this method, it is possible to detect surface defects of products made from non-metals and alloys, which are inaccessible to the magnetic method.

Penetrant testing process

PT method is especially effective for the detection of flaws with the following parameters:

width of 1 micron;
depth of more than 10 microns;
length of 0.1 mm.

Testing represents a sequence of several operations:

1. Cleaning and deoiling of the testing surface.

2. Indicator laying, filling of the defective area. The accelerated penetration of liquids is practiced by increasing and decreasing of the pressure, influence of ultrasonic and acoustic waves on the material, indicator heating, the use of static load on the subject, etc.

3. Freeing of liquid excess. The composition is blown away or wiped in such way that it remains only in defects.

4. Laying of developing agent. Brushes, brooms and sprays are used to do it. The developing agent is produced in the form of a powder or in the form of a phosphor bath which glow when exposed to ultraviolet light.

5. Drying of developing agent, absorption of the indicator liquid, tinting the defective areas.

The liquid appears at edges of the defects and evaporates adding the dye in the indicator liquid and heating. Solidified developing agent allows to evaluate amount and position of the defects. Enlarging lens and photo sensors are used to detect them.

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.