1 very widely use in application 2 widely use for construction,transmission,chemical industry, 3 petrifaction pipe We are Laiwu Fangyuan Tube Co.,Ltd was located in the city of Laiwu in center of Shandong province which was famous for the other name “City Of Steel”. The factory near the Jinan Airport in the north only 100KM away,, Qingdao port and Rizhao port in the east,only 200KM awayJiqing ...