Manufacturing method of interior container of low-temperature container based on austenitic stainless steel low-temperature property

Abstract

The invention relates to the design and manufacture of low-temperature containers, in order to provide a manufacturing method of an interior container of a low-temperature container based on an austenitic stainless steel low-temperature property. The method comprises the following steps of: acquiring the variation rule of the austenitic stainless steel mechanical property from the normal-temperature to low-temperature environment; determining the minimum guarantee value of the austenitic stainless steel mechanical property at low temperature environment; selecting the intensity value for design according to the design temperature of the interior container of the low-temperature container; determining the allowable stress value for the design of the container in the low-temperature container; and designing and calculating each relevant parameter and manufacturing. Through the manufacturing method provided by the invention, the intensity value and the allowable stress of the interior container can be improved further based on the manufacturing method of the existing low-temperature container (including a conventional low-temperature container and a strain strengthening low-temperature container); the wall thickness of the interior container is thinned, and the weight of the interior container is relieved, thereby achieving a better energy-saving and emission-reduction effect and a higher light weight degree of the low-temperature container.

Description

technical field [0001] The invention relates to the design and manufacture of a cryogenic vessel, in particular to a method for manufacturing an inner vessel of a cryogenic vessel based on the low-temperature performance of austenitic stainless steel. Background technique [0002] Cryogenic container is a kind of pressure-bearing equipment that operates in a low-temperature environment. The storage and transportation of low-temperature liquefied gas in low-temperature containers is currently the main method for storage and transportation of low-temperature liquefied gases. Compared with gaseous transportation, this method has the advantages of high storage efficiency and less land occupation. For example, The volume of liquefied natural gas is about 1 / 625 of the volume of gaseous natural gas of the same mass. With the adjustment of energy structure and the deployment of my country's energy strategy, cryogenic containers as energy storage and transportation equipment such as ...

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Problems solved by technology

The improvement of strength means that the material can have a higher load-carrying capacity in a low-temperature environment. However, my country is currently in the design of low-temperature vessels such as GB150-2011 "Pressure Vessels" and GB / T18442-2011 "Stationary Vacuum Insulated Cryogenic Pressure Vessels" The strengthening effect of low temperature on material properties, especially material strength, is not considered in the standard, and the mechanical properties of materials at room temperature are still used as the basis for cryogenic container design

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