Container weld inspections are crucial to ensure structural integrity and safety. Among the non-destructive testing methods available, Magnetic Particle Inspection (MPI) stands out. This technique utilizes magnetic powders to reveal defects and discontinuities in ferromagnetic materials without causing any damage.
 
The process of MPI involves magnetizing the ferromagnetic workpiece, which leads to localized distortions in the magnetic field lines when discontinuities are present. This results in a leakage magnetic field that attracts magnetic powders applied to the surface. When appropriately illuminated, these powders form visible indications, allowing for the identification of location, size, shape, and severity of any defects.
 
For effective flaw detection, TLS employs black magnetic paste during MPI. This specific approach boasts high sensitivity in detecting even the smallest surface imperfections. The procedure comprises the following steps:
  1. Application of Magnetic Levitation: A slow and controlled application of magnetic levitation over the workpiece prevents the washing away of magnetic imprints.
  2. Utilization of Fixed Devices: Implementing fixed devices streamlines the process, ensuring ease of operation and high efficiency.
  3. Demagnetization: This step reduces residual magnetism in the inspected workpiece, enabling subsequent processing or normal usage.
  4. Removal and Drying: After the magnetic particle inspection, any residual magnetic levitation on the surface is removed and dried.
 
All our Quality Assurance personnel undergo rigorous certification examinations. At TLS, we uphold an unwavering commitment to product quality, delivering only after thorough confirmation that our offerings align with stringent quality inspection standards.
 
TLS Offshore Containers / TLS Special Containers is a global supplier of standard and customised containerised solutions. 
Wherever you are in the world TLS can help you, please contact us.
 
#Container weld inspections #Non-destructive testing #Magnetic Particle Inspection #MPI technique #Ferromagnetic materials #Defect detection #Discontinuity identification #Structural integrity #Safety standards #Surface imperfections

Written by Oliver

During the video inspection of explosion-proof pressure containers, several critical aspects are thoroughly examined to ensure their safety and compliance with regulations. The inspection process includes the following key areas:
  • 1. Visual inspection
Including the inspection of the positive pressure explosion-proof control system and various major accessories for installation. At the same time, it is also necessary to check the details of the sealing of the positive pressure container and whether the labels are in place. We will check them one by one according to the customer's configuration
  • 2. Insulation resistance test
  • 3. Functional check
Positive pressure explosion-proof containers usually have 3 modes：Automatic mode, Bypass mode, Manual mode.
Check the functions of all modes, and the functional tests of all modes will be carried out one by one according to the regulations on the FAT file.
Automatic mode: normal use in hazardous areas
Bypass mode: can only be used in safe area
Manual mode: for emergency use only
In "bypass mode" and "manual mode", the explosion-proof fan can be started manually only when the air inlet and outlet valves are fully opened; when the air valve is not fully opened, the manual switch of the explosion-proof fan is invalid.

​TLS pays attention to every detail of the product, please feel free to contact us for any needs
Positive pressure containers are essential safety equipment used in industries operating in explosive environments. Before these containers are shipped, several crucial preparations and tests are conducted to ensure their quality and functionality. This article provides insights into the pre-shipment preparations for positive pressure containers, giving you a better understanding of the measures taken to ensure a safe and reliable product.
  • Visual Inspection and Quality Checks:
One of the initial steps in preparing positive pressure containers for shipment involves a comprehensive visual inspection and quality checks. Engineers and quality inspectors meticulously examine the container's external appearance, equipment fittings, and signage. They verify that the container meets design specifications, adheres to safety standards, and fulfills customer requirements. This meticulous inspection guarantees the container's overall quality and reliability.
  • Functional Testing of Critical Systems:
Before shipping, positive pressure containers undergo thorough functional testing of their critical systems. Engineers and technicians evaluate the performance of essential components, such as the CPFG control system, temperature sensors, smoke detectors, Manual Call Points (MCP), Emergency Shutdown (ESD) buttons, pressure differential gauges, fire dampers, and fans. This rigorous testing ensures that all systems operate as intended, creating a controlled and safe environment within the container.
  • Customization to Meet Specific Needs:
Positive pressure containers are often customized to meet the specific needs of different industries and customers. As part of the pre-shipment preparations, customization is done to fulfill these unique requirements. This may involve incorporating additional safety features, modifying equipment placements, or adapting the container's functionality. By tailoring the container to meet specific needs, it ensures optimal safety and operational efficiency for the end user.
  • Documentation and Compliance:
Another important aspect of pre-shipment preparations is ensuring proper documentation and compliance. Engineers and quality inspectors verify that all necessary documentation, including certifications, test reports, and compliance with industry regulations, is in order. This ensures that the container meets the required standards and can be safely transported and installed at its destination.
  • Final Checks and Packaging:
Before the positive pressure container is shipped, a final round of checks is conducted to ensure that everything is in order. This includes verifying that all equipment is securely fastened, labels and markings are clear and accurate, and any necessary protective measures are in place to prevent damage during transit. The container is then carefully packaged to ensure it arrives at its destination in optimal condition.