In this article, we’ll discuss How to Fit Pipe for Welding with their features. working, avoiding mistakes, and Conclusion. Pipe welding can be described as a complicated task that involves the joining of two curved metals. The process can be achieved by using various welding methods such as the TIG method, MIG, or arc weld.
Also Read this Article: How Hot Is A Welding Arc
Follow This Procedure for How to Fit Pipe for Welding
Here is a step-by-step guideline to connect two pipes before welding.
Install the pipes to be fitted and then place them on your desk. Be sure to check the pipes’ thickness as it’s one of the biggest problems with fitting.
Clean and bevel the pipes before cutting the ends. Start cleansing both the pipes from the inside and outside to eliminate dirt and impurities from their surfaces.
When you bevel, make sure that you don’t exceed 1.5 millimeters off the pipe’s edge, and work by removing the line from the outside.
Then, you can proceed to cut the edges beveled for a smooth fitting. Make use of a measuring tape to make sure the length of the pullout is precisely measured to ensure the fitting process is successful.
The correct measurements will reduce the work to fit the pipes. Keenly be aware of the fusion to ensure the fitting conforms to the written script. Before you begin fusion, make sure you’ve checked your part’s thermodynamic properties and determine whether they’re compatible.
If you’re using different pipes, you’ll need to wait more time to allow the components to reach the identical temperature. Start fitting by placing the thermoelectric element vertically on the pipes to be installed.
While you fuse the pipes, ensure they are held in a secure position to prevent excessive rotations. Continue to hold them until the time for heating has passed. It is possible to remove the molds when the heating time is over so that the assembly can cool.
Be careful not to rotate the part when welding and afterward. Use some pressure on the cooling part of the workpiece to create a smooth weld.
Avoid Common Mistakes:
From the pipes that are designed for gas and oil use to high-pressure pipes for the food and beverage industry, Welders have to face various challenges when it comes to the welding process.
Here are a few areas to be inspected to avoid common mistakes welding workers make:
Properly Tacking:
- Proper tacking is a vital step during fitting pipes.
- Cutting off the tack improves the reliability of the final weld.
- Any defect in the metal filler could affect the whole tacking process, which can help reduce the risk of this issue.
- Grinding The Joint during Weld Preparation It is a typical issue in welding.
- Welders usually employ plasma or oxyfuel for the preparation of the material.
- These processes produce an oxide layer over the cutting edge.
- This layer has to be removed before welding. Therefore, the oxides could cause porosity or other problems.
- The Drive Roll The decision about the kind of drive roll you will use depends on the welding process.
- The type of wire you’ll use will affect the best drive roll.
- In the case of using the standard V drive roll then solid wires will be the best choice.
- Copper-coated wires, on the other hand, are only compatible using groove drives.
The Flow Rate of the Shielding Gas:
The myth that the use of more shielding gas is the best solution to protect the workpiece has spread far and wide between welding experts. A high percentage of shielding gas is a waste of money and causes issues like convection effects which eventually lead to porosity.
Utilize a flow meter regulator to control the rate of shielding gas. Additionally, operators and welders must adhere to the recommended flow rates.
Properly Test Your Pipe Welding:
Testing is essential to determine the pipe welding’s strengths and weaknesses. Also, it is important to evaluate the quality of work that is done. The methods employed to test pipe welds are:
It is the Liquid Dye Penetration Test:
This test involves spraying dye on the surface of a metal and then allowing it enough time for it to penetrate. Once the surface has dried it will be able to see all the imperfections that were not visible are revealed. Compared to the method of visual inspection that uses liquid dye, the test is less expensive and beneficial.
Tests using X-Rays:
This technique is mostly used for tasks where the quality of welding is vital for safety reasons. Like the X-rays used on humans, it is done by experts. Incredibly, it’s the most reliable test welder employed to test pipe welding.
Macro Etch Testing Macro testing is the process of cutting the welded piece, polishing it, and using a tiny amount of acid solution. This allows you to test properties such as porosity inclusions, cracks and cracks’ unsoundness pinholes, as well as hydrogen flake.
After weighing all the relevant elements, the last step is to install the pipe to allow welding. The process starts by mounting the cut-off of metal on an arm saw with a radial angle.
The saw is adjusted or moved so that the central point of the saw is at exactly the same height as the pipe. The grinding process continues until the two pipe fittings are ready for the welding process.
Conclusion: How to Fit Pipe for Welding
The process of welding pipes could seem complex however, with proper preparation, you will get the perfect result. If you practice regularly your skills will continue getting better. Applying these tips will guarantee your safety and success when you tackle your next project.