... :ANSI B16.5 4.Qualification;API,ISO,CE blind flange class 150/600/900size 1/2" to 24" ASME B16.5 ... , 900Lbs, 1500Lbs, 2500Lbs,Etc /PN6,PN10,PN16,PN20,PN25,PN40/ Class A, B, C, D, EstandardASME B16.5, ASME B16.47 ... Certificate,ISO 14001 Environment Mangement System Certificate,OHSAS18001 Occupational Health & Safety Mangement System Certificate, acquired the license for manufacturing special pressure ...