General Welded Pipes: General welded pipes are used for conveying low-pressure fluids. They are made of Q195A, Q215A, and Q235A steel, or other easily weldable mild steel. These pipes undergo hydrostatic, bending, and flattening tests, with specific requirements for surface quality. Typically, they are supplied in lengths ranging from 4 to 10 meters, often requiring proportional scaling (or double scaling) for transportation. The nominal diameter (in millimeters or inches) of welded pipes differs from their actual specifications. Depending on the wall thickness, there are two common types: standard and extra-thick. Pipes are also classified as threaded or non-threaded based on the shape of their ends, defining the dimensions of welded steel pipes.
What precautions should be taken when using straight seam steel pipes? Let's briefly introduce some key points that may be helpful to you.
The installation and use of straight seam steel pipes require strict technical compliance and adherence to operational procedures to ensure safety and quality, taking into account actual conditions. During general usage, pay attention to the following points:
Preparation before Using Straight Seam Steel Pipes
Ensure that pipe trenches are excavated and pipe wells are constructed properly.
Position all necessary straight seam steel pipes and tools, including welding machines, cutting machines, electric hammers, polishing machines, etc., in readiness.
Commence installation only after completing all preparatory work.
Prefabricate pipe supports according to design drawings and site conditions, punch and shear as per design and site requirements, polish grooves with a polishing machine, and then proceed with welding.
Quality Requirements for Use
Avoid welding branch pipes at weld seams and refrain from welding at bends.
The deviation for vertically installed risers should be less than 3mm per meter, and horizontal installation deviations should be less than 1mm.
Welding must be straight, with complete welds, and the weld surface should be free from burn-throughs and cracks.
