Conventional sources of raw materials
| CARBON STEEL PIPE ALLOY STEEL PIPE | CARBON STEEL PLATE |
|---|---|
| SHANGHAI BAOSHAN IRON & STEEL CO.,LTD. | WUYANG IRON & STEEL CO.,LTD. |
| CHENDU IRON & STEEL CO., LTD. | JINAN IRON AND STEEL COMPANY LTD. |
| JIANGYIN CHANGJIANG PIPE CO., LTD. | ANYANG IRON AND STEEL COMPANY LTD. |
| BAOTOU IRON & STEEL CO., LTD. | SHOUGANG GROUP |
| TIAN JIN PIPE (GROUP) CORPORATION | |
| WUXI SPECIAL STEEL MATERIAL CO.,LTD. | BASE MATERIAL OF CS FORGED FITTING |
| ANHUI TIANDA OIL PIPE COMPANG LIMITED. | SHANXI TAIYUAN STEEL CO., LTD. |
| HENGYANG VALIN STEEL TUBE CO.,LTD. | XIANGTAN IRON & STEEL CO., LTD. |
| TIANJING WUZHI GROUP | ?NANJING IRON & STEEL CO.,LTD. |
| STAINLESS STEEL PIPE | JIANGSU SHAGANG GROUP |
| HUZHOU JULEI GROUP CO.,LTD. | WUHAN IRON & STEEL GROUP CORPORATION |
| JIANGSU WUJIN STEEL PIPE GROUP CO., LTD. | JIANGYIN XINGCHENG SPECIAL STEEL CO.,LTD. |
| ZHEJIANG FONYE GROUP CO.,LTD. | XINING SPECIAL STEEL CO.,LTD. |
| SHANXI TAIYUAN STEEL PIPE CO., LTD. | JIANGSU SUZHOU STEEL GROUP CO.,LTD. |
| ? | |
| BASE MATERIAL OF SS FORGED FITTING | STAINLESS STEEL PLATE? |
| SHANXI TAIYUAN SS LIMITED CO.,LTD. | BAOSTEEL SPECIAL METALS CO.,LTD?. |
| SHANGHAI QICANG SS PIPE CO., LTD. | SHANXI TAIYUAN SS LIMITED CO.,LTD.? |
| ANHUI ZHETAI SS CO.,LTD. | KUNSHAN DAGENG SS CO.,LTD.? |
| SHANGHAI YATAI STEEL GROUP CO.,LTD. | ZHANGJIAGANG POHANG SS CO.,LTD?. |
| YONGXING SPECIAL STAINLESS STEEL CO., LTD. | ? |