Get current pricing for Weldon Incorporated, 6,300 Sq. Ft. Weldon 6300 Sq. Ft. Weldon Incorporated 316 Ss Vertical Heat Exchanger. 44 Diameter X 26', Long. (967) 1 Diameter 316 Ss Tubes Rated 25 Psi @ 400 . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: