Masiku ano, Hunan Great Steel Pipe Co., Ltd yapatsidwa ziphaso zingapo zovomerezeka zoperekedwa ndi mabungwe angapo apakhomo ndi akunja.Monga:
Quality Management System (ISO 9001)
Satifiketi Yaubwino (CIQ)
Malingaliro a kampani Société Generale de Surveillance S.A.
