Abstract: A method of manufacturing a delayed coker drum as used in a refining process to receive coke feedstock as a hot liquid and in which the coke feedstock is cooled and quenched to produce solid coke, the hot liquid causing the drum to initially expand circumferentially and laterally and upon quenching to shrink due to thermal contraction, the circumferential shrinking serving to crush solidified coke and the lateral shrinking causing interface frictional contact between the solidified coke and the vessel sidewall that must be overcome, inducing high level stresses in the drum, including the steps of selecting a plurality of metal plates configured for assembling the drum, and welding the plates together creating welded seams and in which the metal plates are selected to have metallurgical characteristics and thicknesses such that their elastic limits exceed the stress introduced in the plates during the quenching process and employing welding materials and techniques such that the elastic limits of the welded se

Abstract: A method of controlling the rate of quench of coke in a coke drum to reduce deterioration of the coke drum sidewall in which water is admitted into the coke drum filled with hot coke to cool the coke includes the steps of determining the stress imposed on the coke drum sidewall by means of at least one strain gauge affixed to the sidewall and controlling the rate of admission of water into the coke drum in response to the determined stress so that the rate of water admission keeps the stress below a preselected maximum level.