Profile: Delphi Engineering & Contracting, Inc. specializes in on-site preheating, stress relieving, refractory dry out & curing, combustion firing and custom heat applications. Our company offers a full range of heat treatment services such as stress relieving, lining cures, temporary heat, post weld heat treat and hardness surveys. Our products are used in petrochemical refineries, power generating plants, fabricators and construction industries.