- Hunan Great Steel Pipe Co.Ltd
- GlobalAsiaMain camp:Worldwide
- Liaocheng Chang Hua pipe
- GlobalAsiaMain camp:
- Albert Pipe Co. Ltd. Tianjin City Junchi
- GlobalAsiaMain camp:无缝钢管,不锈钢管,合金管,无缝管,无缝方管,高压锅炉管,低温合金管,管线管,石油套管,化肥专用管,地质管,异型管,不锈钢焊管,螺旋管,流体管,液压支架管,精密无缝管,船舶专用管,光亮管,散热器专用管