... structures are certified to BHP, Rio Tinto and Xstrata Material and Welding QA requirement. Most of our products are ... :2008 certified.4) We can provide worldwide certified welding, material and galvanizing data sheet reports to fulfil all QA requirements ... able to bring our business to a new level. Steel constructure,Steel Structure,Steel Fabrication,Conveyor System,Conveyor Frame,Conveyor Structure ...