论文部分内容阅读
某单位供热站1台FBR08型换热器,自2001年11月投用至2003年7月(3个采暖期,每采暖期4个月),由于内部结垢严重致使换热效率降低,对其进行拆洗除垢后,在组装过程中发现存在变形,试压发现多处渗漏。将板片返回原厂上机复压整形后重新组装,经试压仍有多处渗漏。经拆解后对所有板片进行渗透探伤,发现多个板片出现裂纹。该换热器板片材质为18-8型奥氏体不锈钢,型号为5U5304(JISG4305),厚度δ=0.8mm。为了寻找板片开裂的原因,对未经复压板片和
A unit heating station FBR08 type heat exchanger, put into operation from November 2001 to July 2003 (3 heating period, 4 months per heating period), due to the serious scaling of internal heat exchanger resulting in reduced efficiency, Demolition of its cleaning descaling, found in the assembly process there is deformation, pressure test found multiple leaks. The plate back to the original machine on the plastic pressure re-assembly, there are still many leaks through the pressure test. After dismantling, all plates were penetrated and flawed, and cracks were found in several plates. The heat exchanger plate material is 18-8 type austenitic stainless steel, model 5U5304 (JISG4305), the thickness δ = 0.8mm. In order to find the reason for the cracking of the sheet, the sheet was uncompressed and pressed