Reducing flanges are designed for use in changing diameters in a piping system. A reducing flange comprises a flange with one specified diameter having a bore of a different and smaller, diameter. Except for the bore and hub dimensions, the reducing flange will have dimensions of the larger pipe size. These flanges are used at the outlet side of the expansion joint to increase the size of the flange. This is considered to be an economical method to make a transition in size. Specifications: Stainless Steel Grades: 304, 304L, 304H, 309, 310, 310S, 316, 316Ti, 316 L, 317, 317L, 321, 347, 347 H, 409, 410, 410S, 420, 430 Duplex Steel Grades: 2205 (UNS No. S31803),2207 (UNS No. S32760) Nickel Alloy Grades: Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hestelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020) Titanium (Grade I & II) Copper Alloy Grades: UNS No. C 10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500,UNS No. C 70600 (Cu -Ni- 90/10), C 71500 (Cu -Ni- 70/30) Size : 1/8" NB TO 48"NB. Class : 150#, 300#,400 #,600#,900#, 1500# & 2500 #.