... wound gasket, PTFE≤480°C0.6~500MPa(150LB~600LB)Flange joint,Butt Welding joint,Threaded jointAssistance fire layer material: ... class: BS 5501, IIA, IIB, IIC.Flange standards: GB, HG, SH, HGJ, JB, ANSL, JIS, and other standards.(If appoint, please ... the product size, operating pressure and material.If need other standard flange, material or operating pressure, please indicate when ordering. biogas ...