If the large-diameter spiral steel pipe is processed to a certain length, there must be bending, which is a phenomenon and situation that is often encountered in steel pipes. The large-diameter spiral steel pipe is commonly called “goose head bend” due to the unevenness along the length or the bending at the bottom of the steel pipe.
The main reasons for bending are caused by local water cooling during manual thermal inspection; improper adjustment during straightening and serious wear of straightening rollers; bending caused by hoisting and transportation; improper processing, assembly and adjustment of sizing machines can also cause possible.
For large-diameter spiral steel pipes that have been bent, if the curvature exceeds the standard, secondary straightening can be performed, but if it is a “goose-head bend” that cannot be straightened, it should be removed. In addition, in the production process of large-diameter spiral steel pipes, since several rollers cannot be very accurately aligned in a straight line, bending is easy to occur. The solution is to increase the number and distance of these several rollers.
Post time: Dec-05-2022