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                                                      重庆--GB9948石油裂化管,山东军企物质-GB9948-2013石油裂化管石油裂化管

                                                      时间:2022/3/16 来源:www.votreurl.com

                                                       


                                                      GB9948-2013石油裂化管主要用来制造高压及其以上压力的蒸汽锅炉管道等用的优质的碳素钢结构、合金结构钢和不锈耐热钢高压无缝 管、这些锅炉管经高温和高压下工作、管子在高温烟气和水蒸汽的作用下还会发生氧化和腐蚀,因此要求钢管有高的持久强度、高的抗氧化性能,并具有良好的组织稳定性,采用钢号有:优质碳素结构钢钢号有20G、20MnG、25MnG;合金结构钢钢号15MoG、20MoG、12CrMoG、15CrMoG、12Cr2MoG、12CrMoVG、12Cr3MoVSiTiB等;有锈耐热钢常用1Cr18Ni9、1Cr18Ni11Nb高压锅炉管除保证化学成分和机械性能外,要逐根做水压试验,要作扩口、压扁试验,高压无缝管以热处理状态交货。
                                                      1、概述
                                                      (1)生产制造方法:
                                                      ①一般GB9948无缝钢管使用温度在450℃以下,国产管主要用10号、20号碳结钢热轧管或冷拔管制造。
                                                      ②GB9948无缝钢管使用时经常处于高温和高压条件,管子在高温烟气和水蒸气的作用下,会发生氧化和腐蚀。要求钢管具有高的持久强度,高的抗氧化腐蚀性能,并有良好的组织稳定性。
                                                      (2)用途:
                                                      ①一般GB9948无缝钢管主要用来制造水冷壁管、沸水管、过热蒸汽管、机车锅炉用的过热蒸汽管,大、小烟管及拱砖管等。
                                                      ②GB9948无缝钢管主要用来制造高压和超高压锅炉的过热器管、再热器管、导气管、主蒸汽管等。



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