Hengyang Valin Steel Tube Co., Ltd (lẹhin ti a tọka si HYST) jẹ ipilẹ ni ọdun 1958, o jẹ oniranlọwọ ti Hunan Valin Iron & Steel Group Co., Ltd. O ni awọn oṣiṣẹ 3900 bayi pẹlu awọn ohun-ini lapapọ ti 13.5 bilionu Yuan. O jẹ ifọwọsi bi ile-iṣẹ imọ-ẹrọ giga ati tuntun, ile-iṣẹ ti o ni anfani ni awọn ẹtọ ohun-ini imọ ni orilẹ-ede, ile-iṣẹ laarin awọn ile-iṣẹ mẹwa mẹwa ti o ga julọ ni iṣowo okeere ni Agbegbe Hunan ati ile-iṣẹ laarin awọn ẹya ifihan mẹwa mẹwa ni aabo ni agbegbe Hunan.
CITIC Pacific Special Steel Holdings (CITIC Special Steel fun kukuru), jẹ oniranlọwọ ti CITIC Limited. O ti ni iru awọn ile-iṣẹ abẹlẹ bii Jiangyin Xingcheng Special Steel Works Co., Ltd, Hubei Xinyegang Steel Co., Ltd, Daye Special Steel Co., Ltd, Qingdao Special Steel Co., Ltd, Jingjiang Special Steel Co., Ltd, Tongling Awọn ohun elo Pataki ti Pacific Co., Ltd ati Yangzhou Pacific Special Materials Co., Ltd, ti o n ṣe agbekalẹ eti okun ati ipilẹ ilana ilana odo ti ile-iṣẹ pq.
Yangzhou Chengde Steel Pipe Co., Ltd jẹ iyipo lati Jiangsu Chengde Steel Pipe Co., Ltd., eyiti o jẹ ile-iṣẹ kilasi orilẹ-ede keji, imọ-jinlẹ agbegbe ati imọ-ẹrọ aladani pẹlu iṣelọpọ akọkọ ti ọpọlọpọ 219-720 × 3 -100mm erogba steels ati alloy irin seamless, irin pipes. Isejade naa bo ọpọlọpọ awọn ile-iṣẹ bii agbara Gbona, Petrochemical & Refinery, igbomikana, Mechanical, Epo & gaasi, edu ati ikole ọkọ. Ile-iṣẹ naa jẹ ile-iṣẹ aladani alailẹgbẹ ti ile ti o ni ọpọlọpọ pipe julọ ti awọn paipu irin alailẹgbẹ.
Baotou Iron and Steel Group, Baotou Steel tabi Ẹgbẹ Baogang jẹ ile-iṣẹ irin ati irin ti ijọba ni Baotou, Inner Mongolia, China. O ti tun ṣeto ni 1998 lati Baotou Iron ati Irin Company ti iṣeto ni 1954. O jẹ ile-iṣẹ irin ti o tobi julọ ni Mongolia Inner. O ni ipilẹ iṣelọpọ nla ti irin ati irin ati iwadii imọ-jinlẹ ti o tobi julọ ati ipilẹ iṣelọpọ ti awọn ilẹ toje ni Ilu China. Ile-iṣẹ oniranlọwọ rẹ, Inner Mongolia Baotou Steel Union (SSE: 600010), ti dasilẹ ati ti ṣe atokọ lori Iṣowo Iṣura Shanghai ni ọdun 1997.
