The blind plate should be set at the part that requires isolation (cut-off), such as at the port of the equipment, before and after the shut-off valve or between two flanges. It is usually recommended to use a figure 8 blind plate; a plug-in plate (round blind plate) can also be used for one-time use parts such as pressing and purging.
Material
Carbon steel
ASTM A105, A350 LF1, LF2, LF3, LF6, CL1/CL2,; A694 F52, F60, F65, F70; A516 Gr. 60, 70;
BS-EN 10222-2 P245GH, P280GH; EN10222-4 P355NH, P355QH; EN10273 P250GH, P265GH;
DIN 17243 C22.8; VD-TUEV350/3 C21; GB/T 1591 Q345B, Q420B; NB/T 47008 16Mn,20#;
BS 10250-2 S235JRG2;
Stainless steel…