THE DIFFERENCE BETWEEN API5L SEAMLESS STEEL PIPE AND API5L SEAMLESS STEEL PIPE

API5L seamless steel pipe production technology: seamless steel tube is mainly through the tension reducing diameter to complete, Zhang Lijian sizing process is hollow base material without mandrel continuous rolling process.

(API5L seamless steel pipe: in order to ensure the parent pipe welding quality conditions, pipe tension reducing process is to pipe the whole heating to 950 degrees Celsius above, and then the tension reducing mill stretch reducing mill a total of 24 times) rolled into a variety of diameter and wall thickness of the finished pipe, the use of this technology produced hot-rolled steel and ordinary high-frequency welded pipe has essential distinction by heating furnace after heating the weld and parent microstructure and mechanical performance can be reached completely consistent in addition, through multi pass tension reducing mill rolling and automatic control of the pipe size accuracy (especially the tube body roundness and wall thickness accuracy) is better than the same seamless tube. Developed countries of the world production of fluid pipe, boiler tube has been widely used in the process of welded pipe seamless, along with the development of society, the domestic hot-rolled pipe gradually replace seamless pipe, the situation has been formed. Seamless steel pipe prices better than straight seam welded pipe is about high 200-500 yuan / ton, while the seamless steel pipe price than the price of seamless steel pipe and high 800-1200 yuan / ton.