The products have been approved successively by the world major marine classification societies: CCS (P. R. China), LR (U. K.), GL (Germany), A. B. S. (U.S.A.), DNV (Norway), NK (Japan), BV (France), RS (Russia), RINA (Italy), KR (Korea). It can provide its customers with the product certificate issued by any of the above classification socities.  Pls contact us if any enquiry.