Get current pricing for Ohmstede, 1,376 Sq. Ft. Ohmste 1376 Sq Ft Horizontal Ss Heat Exchanger. 304l-ss Shell Rated 75 Psi @ 280 Deg F. 304l-ss Tubes Rated 75 Psi @ 160 Deg. F. Shell: 34 Od X 14' . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: