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劳锅局函字[1989]2033号各省、自治区、直辖市劳动人事厅(劳动局):在执行JB 3 6 2 2—8 4《锅壳式锅炉受压元件强度计算标准》第4、2、1、3条款的过程中,不少单位询问是否所有立式锅壳锅炉的平炉胆上沿环向均匀开有孔时,都要计算孔桥减弱系数。对此,上海工业锅炉研究所工锅研(88)行字第0 4 2号《关于平炉胆开孔排强度计算问题的请示报告》中提出:是否要计算孔桥减弱系数,要视具体情况而定。有些结构民的炉胆
Labor Bureau Letter [1989] No. 2033 Labor Authorities (Labor Bureaus) of All Provinces, Autonomous Regions and Municipalities directly under the Central Government: When implementing the procedures set forth in paragraphs 4, 2, and 4 of “Standards for Computation of Strength of Compression Elements of Shell and Boiler Compressors” 1,3 the process of the process, many units asked whether all vertical boiler shell boiler open evenly along the ring bores, we must calculate the hole bridge attenuation coefficient. In response, the Shanghai Institute of Industrial Boiler Research (88) line word No. 4242 “on the open hearth billet strength calculation request report” put forward: whether to calculate the hole bridge reduction factor, depending on the circumstances And set. Some structure of people’s furnace