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在石油化工及其他行业,换热器是一种使用较为广泛的设备,当换热器管程和壳程所走的介质具有不同的腐蚀性时则要求换热器管板的两个表面具有不同的耐蚀性能。设计选材时可选用复合钢板、高合金耐蚀钢,但为了节省资金,通常采用堆焊管板来满足耐蚀要求。堆焊可采用手工焊、埋弧焊、带极电弧焊和双热丝等离子弧焊等方法,但无
In the petrochemical industry and other industries, the heat exchanger is a more widely used equipment, when the heat exchanger tube and the shell to go away with different media medium corrosive requirements of both surfaces of the heat exchanger tube plate has Different corrosion resistance. Selection of design materials can choose composite steel, high alloy corrosion-resistant steel, but in order to save money, usually used to meet the requirements of corrosion resistant tube sheet. Surfacing welding can be used manual, submerged arc welding, with arc welding and double hot wire plasma arc welding and other methods, but no