metallic flexible hoses reduce pipe wall noise transmission, prevent pipe fatigue, simplify alignment problems and reduce equipment flange stress. Hoses are manufactured from annular corrugated 304 stainless steel tubing covered by a tightly woven 304 stainless steel braid. The corrugations are very close pitched for maximum flexibility. Type ffl has fixed x floating raised face flanges. The floating flange on one side make it easier to align the bolt holes during installation. The raised face flanges seal better than traditional flat face flanges.