Category: WELDING INSPECTION

NDT(Non-destructive testing)of offshore containers - magnetic particle testing

3/8/2023

As an important tool for offshore operations, offshore containers must undergo strict testing and maintenance to ensure their safety and reliability. NDT is an important method for offshore container inspection，which can effectively detect defects, cracks and fatigue on the surface of containers, and ensuring the reliability and safety of the container.
Some common methods of NDT for offshore containers are: ultrasonic testing (UT), magnetic particle testing (MPT), eddy current testing (ECT), X-ray testing.
TLS usually adopts the method of MPT. This detection is based on the adsorption characteristics of magnetic powder under the action of a magnetic field. By coating a layer of magnetic powder on the surface of the container and detecting the distribution of the magnetic powder under the action of a magnetic field, it reveals cracks and defects. The specific detection process is as follows:

Container surface preparation: Firstly, the surface of the container needs to be cleaned and treated to ensure that the surface is free of any impurities, grease and other substances
Apply magnetic powder: Apply magnetic powder to the surface of the container so that it covers the entire surface evenly. Magnetic powder is generally composed of iron powder and magnetic particles, and can be applied by mechanical spraying, manual brushing or gas spraying.
Magnetic field effect: Place the container in the magnetic field so that the magnetic field passes through the surface of the container. The magnetic field can be a constant magnetic field or an alternating magnetic field, depending on the requirements of the inspection and the characteristics of the container surface.
Detection of magnetic powder: Use tools such as light source or magnetic induction probe to detect the distribution of magnetic powder, thereby revealing cracks and defects

TLS products are produced and tested in strict accordance with international standards to ensure their quality and reliability.

Written by Mandy

WHAT BASIC TESTS WILL THE FACTORY DO BEFORE THE CONTAINER DELIVERY?

1/21/2022

1 WELDING INSPECTION
Welding inspection of containers, including inspection and NDT.
The whole inspection process runs through the manufacturing process of containers, not limited to the final product, and adjusts production at any time to ensure welding quality.

2 LIFTING TEST
In addition to the test required by international container safety convention, our company will also carry out a two-point and four-point lifting test.
The two-point lifting test mainly tests the anti-deformation ability of containers at sea under extreme conditions, and the four-point lifting test mainly tests the carrying capacity of containers at sea. Both tests do not allow permanent deformation of containers at sea during accelerated crane lifting.

3 DROP TEST
The main purpose of the drop test is to examine the impact of the lifting and placing of containers at sea to ensure that the cabinet can withstand the damage caused by the impact.

4. WATER TIGHTNESS TEST
The container body is sprayed with high-pressure water from all directions, and will be checked in all directions after spraying to ensure that there is no water in it.

WATER TIGHTNESS TEST for shipping container

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NDT(Non-destructive testing)of offshore containers - magnetic particle testing

WHAT BASIC TESTS WILL THE FACTORY DO BEFORE THE CONTAINER DELIVERY?

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