... JIS, JB, GB, 3,Cert:TUV,ISO9001:2000,NK,BV DIN 2533 flangesize 1/2" to 24" ASME B16.524"to ... Estandard ASME B16.5, ASME B16.47, ASME B16.36,DIN 86341-2000, DIN2505material Carbon steel(ASTM A105, Q235,A350LF2,A350LF3 ... ,ISO 14001 Environment Mangement System Certificate,OHSAS18001 Occupational Health & Safety Mangement System Certificate, acquired the license for manufacturing special pressure ...