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GB3531-1996《低温压力容器用低合金钢钢板》标准的技术水平虽较原标准GB3531-1983(包括1987年第1号修改单)有了一定的提高,但相对压力容器的使用要求及国外先进标准而言,仍存在着一定的差距。对于低温压力容器用钢板的选用,特别需要提起注意的是钢板经焊接后,焊接接头热影响区的低温冲击功相对母材有一定的、甚至很大的降低。国内一些工程项目中曾多次出现虽然钢板的低温冲击功符合标准的要求,但产品焊接试板焊
GB3531-1996 “low-temperature pressure vessel with low alloy steel plate,” although the standard technical level than the original standard GB3531-1983 (including 1987 No. 1) a certain increase, but the relative pressure vessel and the use of advanced foreign advanced Standards, there are still some gaps. For the selection of low temperature pressure vessel steel plate, special attention needs to be paid attention is the steel plate after welding, heat affected zone of the weld joint low temperature impact energy relative to the base metal has a certain, or even greatly reduced. Several domestic projects have appeared many times Although the low-temperature impact energy of steel meet the standards, but the product welding test board welding