SA 515 Gr 65 Elliptic dished end with antirust treatment: 1.standard:GB/T 25198-2010, ... 2.diameter .217-12000mm SA 515 Gr 65 Elliptic dished end with antirust treatment: 1.diameter:217-12000mm2.thickness:3-150mm3 ... , chemical industry , boiler, pressure vessels , railway transportation, metal structure, water supply facilities and aerospace engineering, etc.No cracks ,delaninations , inclusion, and ...