... , such as the square pipes,rectangular pipes, oval pipes,etc.After absorbing advanced pipe making technology from both abroad and domestic, our ... economical but also practical. 2.Applied raw material: Low carbon steel, low alloy steel, galvanized steel, stainless steel,etc 3. Popular models: ModelKJ12KJ25KJ45KJ60KJ76KJ115KJ165KJ219Diameter of welded tubes7 ...