Our company is Tianjin Lida Steel Pipe Group Co., Ltd. (former Tianjin Lida Steel Pipe Factory), with 11 high-frequency welded steel pipe production lines (?21.3mm-?340mm), 8 trimming lines, 10 hot-dip galvanized steel pipe production lines (?21.30-?219.10) and 6 steel-plastic compound pipe production lines (?21.30-?219.10),high-frequency welded steel pipes,hot-dip galvanized steel pipes,steel-plastic compound steel pipes and so on.