Billet perforation temperature based on the same raw materials and something different. However, most of the thermal expansion welded pipe is about 1200 ℃, the temperature is slightly lower when the carbon content and other alloy elements are more.
The second key to heating is to minimize the amount of scale. Especially in hot kneading the elbow, thermal expansion pipe from the east-west life and kneading the surface quality of the pipe to go, implore more severe.
In the spiral pipe production process, because the primary processing is carried out in the hot state, the heating operation is to determine the quality of the product is very important process.
Heating stoves, according to their effect, are divided into heating furnace and reheating furnace; the former is used to heat the billet from normal temperature to processing temperature; the latter is used to reheat the billet to the necessary processing temperature.
Improper heating will become the tube surface or external surface may appear on the surface cracks, folding and partial waste and other causes of waste.
