flange adaptor DN500 2.Material:Iron/Steel/Aluminum 3.OEM/ODM,TS16949 4.FIMA ... APQP QA QC,AQL... Qingdao Jowon Mechanical and Electrical Co., Ltd. offers production and operation of ... one production base which covers an area of 135,000 square meters, including building area of 50,000 square meters ... the drawing or send sample to us.flange adaptor DN500 1.Sand casting,iron casting, ...