IS standards are a collection of national standards used for industrial activities in Japan. Japanese Industrial Standard offer a wider variety of slip weld configurations to address the challenges of space limitations and suitability of the existing pipelines. JIS is pretty common in exported pressure equipment from Japan.
B2220 series comprises high-quality stainless steel, carbon steel, and alloy flanges. The material used in manufacturing varies depending on the application of the flanges, like stainless steel will be used when the flange is needed to be exposed to a corrosive environment at high temperature. JIS B2220 also allows surface treatment and can be used to connect pipes, petroleum, construction, shipbuilding, etc. Below are the various pressure grades for JIS B2220 flanges.