... provnince,China.The Qianhe Steel and Trade Co.,Ltd is one of the best manufacturers in China. And the ... Qianhe steel and Trade Co.,Ltd supply all kinds ... pipes in all size.The Qianhe Steel and Trade Co.,Ltd is the a subsidiary company of the ... biggest steel pipe manufactures HeBei XinZhongLian Special Steel Tube Co.,Ltd. At present, with an area of ...