Praxair Share: Industrial Equipment & Supplies Praxair Visit Website 820 E Front Avenue Bismarck, ND 58504-5647 (701) 223-8255 (800) 472-2128 (701) 223-5598 (fax) Hours: Monday through Friday 8:00am to 5:00 pm, Saturdays 9:00am to Noon About Map About Industrial gases and specialty gases, welding equipment and supplies What's Nearby? Distance: 5 10 15 20 25 50 mi.