GB/T 18442.7-2017: Translated English of Chinese Standard. (GBT 18442.7-2017, GB/T18442.7-2017, GBT18442.7-2017): Static vacuum insulated cryogenic pressure vessels - Part 7: Rules of pressure strengthening for inner vessels
https://www.chinesestandard.net, 23.12.2018 - 33 Seiten
This Part of GB/T 18442 specifies the technical requirements for material, design, manufacture and inspection of the inner vessels of static vacuum insulated cryogenic pressure vessels (hereinafter referred to as the inner vessels) that are manufactured by pressure strengthening technology.
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Annex A informative Important quality control points during manufacturing
Annex E normative Pressure strengthening treatment
according to NB/T Allowable stress austenitic base material Bending sample bending test butt joints calculated cryogenic pressure vessels determined according extensometer ferrite following requirements heat affected zone hole-opening inner vessel insulated cryogenic pressure item and qualification less than level lower than level martensite content maximum deformation section meet the requirements Nondestructive testing over-standard defect perimeter measurement permission of welding pre-tensile sample Pre-tensile termination stress pressure equipment NB/T pressure resistance test pressure strengthening process pressure strengthening technology pressure strengthening treatment Product welding test provisions of Annex provisions of GB/T qualification indicators qualification level ring weld test room temperature sample at room sample is perpendicular sample vessel seam zone stainless steel steel plate strengthening pressure Tensile sample Tensile strength tensile test termination stress value test item testing machine testing of pressure vacuum insulated cryogenic verification test weld joints weld seam reinforcement weld test piece welding materials Welding procedure assessment welding rework