There is a gap between two flanges connecting pipe, if left unattended, when it rains and rain water enters the gap, which must lead to corrosion of both sides of the bolt nut, so the flange protective belts are particularly important to the protection zone! 

"BUSINESSWAY" flange protective belts are made from strong weather ability rubber and corrosion resistance highly 304 stainless steel, and are very convenient to dismount. By SGS detection, can reach the highest level (10 levels without defects) protection!