| With great importance attached to quality in the past years,KOKO has been successively certified to API,TUV ISO9001-2000,module 'H' CE,AZ.Besides,KOKO has become a member of China Valve Association,Sinopec Materials and Resources Market,class-l supply network of PetroChina,and a designated production enterprise of the Petrochemical Bureau of China and China National Chemical Equipment Corp.Our products have been recommended for engineering constructions by Ministry of Construction. |