... EN1092-1,NFE,AS,JIS and customers' drawings for special useTechnologyforged,casting certificateISO9001:2000,QS-9000 and ... ApplicationPetroleum, chemical, power, gas, metallurgy, shipbuilding,construction, etcTypeSlip-On, Welding Neck, Blind, Socket Welding, Threaded and Joint ... the People's Republic of China on the Administration of Production License for industrial products, ETC.Cooperating with us, ...