What is the standard for slip blind flange? First of all, there are many standards for blind flanges, such as JB/T SH/T HG/T GB/T ASME DIN JIS BS ISO EN, etc. We must first determine what standard system such as the petrochemical industry is. Basically HG/T SH/T.
The second is to determine the specifications, what specifications, models and pressures. This is also very important. Knowing the pressure can filter out a part of the previous standards. For example, the pressure is 150LB. The above standards only have four types: SH/T HG/T GB/T ASME.