These are make it in Stain less steel 304 & stainless steel 316, which is most suitable material in chemicals, pharmaceuticals, petrochemicals plants. These can use it in chemicals pipeline flange joints, all Acids/Caustic/Hazardous pipe lines joints. in case of damage gaskets, chemical may splash in any direction, it covers the opening area and avoid the accident. We can also use these Flange Guards inside or outside of the plant up to 450ºC Temp.