4,000 Lbs./ Hr Methanol -Water vaporizer designed to vaporize methanol for feeding to a converter, or for other uses. With 304 L SS "U " tube heater Heater has 28" diameter x 1" thick 304 L SS tube sheet 226 304 L SS "U" tubes, 0.75" OD x #16 Gauge thickness Tube length(estimated) 24" Heater surface area is 177.64 square feet Tube sheet bolted to vessel neck Bonnet manufactured by Killebrew Engineering Serial # 12891 90080 rated for 30 psi at 274 degrees F (with two "R" tags).