1.Body:QT450/Q235A/Ductile iron
2.Sealing:NBR/EPDM
3.Follower:QT450/Q235A
4.Linited short pipe:Q235A
5.Stud:Q235A
6.Nut:Q235A
7.Design:ISO2531
8.Flange connection,flange drilling can base on DIN PN10/PN16/PN25,BS4504,EN1092,AWWA,AISI class 150/300,JIS,EN.
double flange expansion joint