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Leak Testing
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Overview

Leak testing can effectively detect the exact location of leakage points in industrial facilities such as flanges, valves, instruments, etc., which facilitates on-site repairs and provides efficient protection for the safe operation of industrial facilities. Leak testing adopts different test methods according to the design pressure, design temperature, internal medium and operation status of the process system, and provides a full range of leak testing services including hydraulic test, gas tightness test and helium leak testing.

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Hydraulic test: industrial facilities are gradually pressurized through a pressurization system, with a test pressure of up to 170MPa, to determine the integrity of the industrial facility by testing the drop in system pressure during the design time and the leakage of the test fluid.


Airtightness testing: Provide customized airtightness testing solutions according to specific customer needs and equipment characteristics.


Helium leak testing: Provide a variety of helium leak testing methods, such as vacuum method, suction gun method, helium mask method, helium spray method, etc., and the measurement accuracy can reach 1.0×10-10 mbar·L/s.
Professional certification qualification: with CNAS leak testing NB/T 47013.8 and CMA certification.


Senior technical team: team members have ISO 9712 certification LT3 level certificate, ASNT certification LT2 level certificate.


Advanced testing equipment: Equipped with the most advanced leak testing equipment in the industry, including high-precision helium mass spectrometer leak detector, ultrasonic detector and so on.


Rich industry experience: We have accumulated rich experience in leakage testing in many industries such as petroleum, chemical, energy and manufacturing.
Comprehensive leakage testing performance: more than 15 years of service experience and more than 1,000 leakage testing projects executed;


Overall Leak Testing Program Performance: Completed the overall helium and nitrogen leak testing service for the largest cylindrical FPSO project in China built by Shell Penguin Oilfield; completed the overall helium and nitrogen leak testing and pipeline drying and inerting service for the LNG receiving terminal project of the world's largest offshore LNG import terminal in Hong Kong; completed the helium and nitrogen leak testing service for the overall program for the heat exchanger system of a large-scale coal chemical plant of China Coal Group; completed the helium and nitrogen leak testing service for a large-scale Completed helium leak testing and repair services for a large-scale heat exchanger system of China Coal Group; completed helium leak testing and repair services for a large-scale thermoelectric vacuum system of Everbright Environmental Protection Group, all of which were highly recognized and praised by customers.
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Tightness Testing Branch
Tightness Testing Branch has become a leader in tightness testing technology in China's oilfield technical service field by virtue of its excellent capabilities in the fields of gas leak testing technology for tubing and casing, no-indentation top release buckle technology, leak testing technology (including hydraulic test, gas-tightness test, and helium leak testing), LDAR technology, flange management technology, industrial cleaning technology, and gas leakage monitoring technology, etc. We provide total leak testing technology solutions for the whole life cycle of process industry facilities, focusing on solving leakage pain points for customers, preventing leakage, identifying leakage, solving leakage, and realizing the creation of “Zero Leakage Factory”.
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Gas leak testing for tubing and casing
Gas leak testing for tubing and casing is a technology to test the gas tightness of threaded connections with helium gas on site. It is the most advanced method to judge the leakage at present, and is the key means to ensure the gas tightness of wellbore tubing column, which effectively solves the world-wide problem of natural gas well annulus production with pressure. At present, this technology has become a standard process in the construction of high temperature and high pressure gas wells, gas storage wells, CCUS wells, energy storage wells and so on. It is characterized by safety and reliability, sensitivity and timeliness, and wide range of application.
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Non-indentation tubing clamp fastening service
It is the most advanced tubular running service in the world., which is provided by a specialized team. Through the special equipment and instruments, professional technical talents and strict technical standards, we accurately monitor the torque of oil/casing upper buckling, etc. The technology has the advantages of no harm to the special steel oil casing, optimal torque control of oil casing upper buckling, reliable sealing of upper buckling, etc., which can ensure the safe and environmentally friendly production of special oil and gas wells, extend the service life of tubular column, and save the development cost, such as the production of high-pressure, high-temperature and high-sulfur wells. This technology has the advantages of no harm to special steel oil casing, optimal torque control of oil casing snap-on, reliable snap-on sealing, etc., which can ensure the safe and environmentally friendly production of high pressure/high temperature/high sulfur content oil and gas wells, extend the service life of tubing column, and save the development cost.
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Flange Management
As a key connecting component in industrial piping systems, the stability and tightness of flanges are critical to the safe operation of the entire system. The flange management services provided by Tong Ao Inspection Group include not only comprehensive inspection and assessment, but also flange fastening, supervision, processing, repair and international training and certification of operators to ensure optimal performance of flanges throughout their life cycle.
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LDAR
LDAR (Leak Detection and Repair) focuses on the detection and repair of volatile organic compounds (VOCs) and hazardous gas leakage in industrial facilities. Our services help companies meet their environmental responsibilities and optimize their operating costs by reducing environmental pollution and improving energy efficiency.
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Industrial Cleaning
Industrial cleaning is a key element in maintaining the performance and extending the service life of industrial equipment, the cleanliness of which is a barometer of its health and efficiency. Tong'ao Inspection Group provides industrial cleaning services, combining advanced technology and customized solutions, to provide customized cleaning solutions of “high-pressure water cleaning, chemical cleaning and hot oil cleaning” for different equipment and environments of customers, to ensure clean, efficient and safe operation of equipment and pipelines.
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