The welding detection of the T-hole of the vertical can weld usually includes the following steps:
Preparation: Before welding, ensure that welding materials and equipment are ready, including welding materials, welding machines, welding rods, etc.
Welding Tee: Cross weld the plates of two welds to form a tee. Make sure the T-seam is strong.
Clean the weld: Use a brush or other tool to remove impurities from the surface of the weld and ensure that the weld is clean.
Apply heat dissipator: Apply a layer of heat dissipator around the welded tee to prevent the weld from cooling too quickly, thereby reducing the possibility of thermal cracking.
Welding: Welding is performed using an electric welding machine to ensure that the weld is fully melted and fused together. Welding according to the requirements of welding materials and welding methods.
Cooling: Let the welding part gradually cool to ensure the quality of the weld.
Clean the weld slag: After the weld has cooled, use a wire brush or other tool to remove the weld slag and make the weld surface smooth.
Welding seam inspection: The use of ultrasonic or X-ray methods to detect whether there are welding defects, such as cracks or pores.
Repair defects: If defects are found in the weld inspection, they need to be repaired to ensure the quality of the weld.
Acceptance and testing: After flaw detection and repair, acceptance and testing of welds are carried out to ensure that welds meet requirements.
Welding operation requires experience and skill, if you are not familiar with welding ask a professional welder to perform the operation to ensure the quality and safety of the weld.
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Cleaning the groove before welding: before welding, rust should be removed from the inside of the groove, five centimeters in and around the groove, no rust, paint, iron oxide, and other filth
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Bottom: Bottom using arc bottom, according to the thickness of the plate and the depth of the groove, the welding rod as far as possible to burn the groove root, so that the hot metal as far as possible through the iron plate, in order to make it easier to clear the root behind, lay the foundation.
Keep the electrode Angle between 75 and 80 degrees. Use multi-layer and multi-pass welding methods. After each weld is completed, carefully use the Angle grinder to clean the upper and lower sides of the weld. At the end of the bottom, the groove is reserved for the edge of about 2㎜.
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Cover: Cover using multi-layer multi-pass welding! Keep the Angle at 75 degrees! The first part of the cover is very critical, and the quality of the first pass molding directly depends on the quality of the entire weld molding, and the second and third passes press one-third of the former.
After forming, the surface is too smooth, the joint can not be too obvious, and the middle concave and convex can not be too big! Height width is almost the same, the edge of the bite can not be greater than 0.5㎜.
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Back root: according to the thickness of the board, to determine the number of gouging edge!
When inspecting the T-hole of the vertical can weld, the inspection equipment and materials need to be prepared first. Then, clean the weld surface to ensure that there are no impurities.
Next, the weld is inspected with a flaw detection instrument, which can be ultrasonic or magnetic particle detection methods. According to the inspection results, the weld is evaluated and judged to determine whether there are defects. If defects are found, they need to be repaired or re-welded.
Finally, the weld quality is confirmed again by flaw detection. The whole process needs to be operated in strict accordance with relevant codes and standards to ensure the quality and safety of the weld.
The T-hole test of vertical can weld is a common welding test method, which is mainly used to test the quality of vertical can weld.
First, prepare a welding equipment and the corresponding flaw detection instrument.
Then, place the T-hole flaw detector at the weld, maintain the appropriate Angle, and keep it in contact with the weld surface.
Next, start the welding equipment to weld with the appropriate welding parameters. After welding is completed, it is cooled.
Subsequently, the weld is scanned with a flaw detection instrument and the signal displayed by the instrument is observed. If there is an abnormal signal, it indicates that there may be defects in the weld and further detection and repair are needed.
Finally, the inspection results are recorded and evaluated, and corresponding measures are taken to repair or re-weld. Through the above steps, we can effectively test and evaluate the quality of the T-hole of the vertical tank weld.