What high-pressure boiler pipe production characteristics?
① tube. High surface quality requirements, the need for stripping, an amount of 5 mm strips, some plants take black grinding.
② tube cutting. Hard steel, the use of flame cutting or sawing.
③ heating. Poor thermal conductivity, and therefore to control the furnace end temperature. The heating temperature is generally 1120 ~ 1180 ℃.
④ rolling. Such steel is generally better performance perforation, deformation parameters can be selected carbon steel.
⑤ rolling after heat treatment. Such pipe after rolling to normalizing and tempering. Air cooling after hot rolling and then take some factories in 730 ~ 740 ℃ tempering.
Higher steel tube geometry requirements in order to ensure a good counterpart welding, pipe length should be as long as possible, helps to reduce the number of welds.
