Jiangsu Rainbow Heavy Industries Co., Ltd. 

Four experts of DNV made a review on Rainbow system from Otc.8 to 11. The result of the review has verified the Rainbow system is effective.
The experts reviewed and conducted the ISO through by discussing、checking documents、site-visiting and so on. Then they communicate with Rainbow leaders and confirm that our ISO system has been approved.
The review of DNV gives Rainbow a high evaluation. And Rainbow will continue to improve its working efficiency and product quality, also will supply a safe place for our staff.