A JIS flange is a type of flange that conforms to the Japanese Industrial Standards (JIS) for flanges. JIS flanges are used in a variety of industries, including the oil and gas, chemical, and water treatment industries. The most common types of JIS flanges are: Welding neck flanges Slip-on flanges Socket weld flanges Threaded flanges Blind flanges The technical specifications of JIS flanges vary depending on the type of flange. However, some common specifications include: Pressure rating: JIS flanges are available in a variety of pressure ratings, from 1 to 200 kg/cm�². Temperature rating: JIS flanges are available in a variety of temperature ratings, from -20 to 420�°C. Material: JIS flanges can be made from a variety of materials, including carbon steel, stainless steel, and alloy steel. Finish: JIS flanges can be finished in a variety of ways, including hot rolled, machined, and electroplated.