Li Tonglian International Group , is located in Cangzhou City , hometown of pipeline equipment in China . 200 Kilometers away from the Beijing [ capital city of The China ] , 120 Kilometers away from Tianjin Port [ a major port in North China ] , multi railway and highway run through Cangzhou City , a place with very convenient traffic . Li Tonglian International Group has started With a strong commitment to quality , customer satisfaction & integrity , designing and manufacturing Hot Rolled Seamless Steel Pipes in 2003 , annual production capacity is 250,000Tons . Outside Diameter Range of pipes is from 21.3 ~ 711.3mm and Wall Thickness Range is from 2mm ~ 59.54mm .