steel tube

 Carbon steel pipe & tube welding technical requirements: 1) Preparatory work Before welding carbon steel pipes, the following preparatory work is required: 1. Clean the surface of the pipe: Since some dust and grease may adhere to the outer surface of the carbon steel pipe, it is necessary to use tools such as pickling or wire brush to scrape off the attachment on the surface of the pipe to ensure that the surface of the pipe is clean and the welding quality is high. 2. Welding equipment: Inverter DC welding machine is used for welding, and cable wiring needs to be carried out in advance to ensure the safety and stability of the power supply. 3. Selection of welding rods or wires: Choose welding rods or wires of different materials and specifications according to the requirements of the pipeline material and usage scenarios. 4. Preheating: By heating, around the weld position to reduce and prevent the occurrence of cold cracks. 2) Equipment requirements When welding carbon ste...

 The welding quality standard of spiral welded steel pipe is an important guide to ensure the quality of the project. The following are some common welding quality standards for spiral welded steel pipe: 1. Welding procedure specification The welding of spiral welded steel pipes shall comply with the relevant welding procedure regulations. These regulations stipulate key elements such as welding materials, preheating temperature, welding parameters, and welding sequence to ensure the stability and reliability of welding quality. 2. Qualification of welding personnel Welding work on spiral welded steel pipe must be performed by trained and qualified welders. They should be familiar with the welding procedure regulations, have good welding technology and experience, and be able to ensure that the welding quality meets the standard requirements. 3. Selection of welding materials Welding materials shall comply with relevant standards and regulations. The quality and performance of weld...