Used Atlas Approx 326 sq. ft. Hastelloy shell and tube heat exchanger. 16" diameter X 78" face to face length. Carbon steel shell rated 150/FV @ -20 to 400 degrees F. C-276 Hastelloy tube bundle rated 150/FV @ -20 to 400 degrees F. (256) 3/4" Tubes. S/N 10003. Built 1998. National Board Number 8499. Shell nozzles-4", Tube nozzles-8".