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某石化厂重整加氢装置于2002年9月建成使用,已运行8年6个月。本次压力管道全面检验属首次检验。原始设计、安装资料不齐全,仅有管道单线图(附材质和壁厚)和该装置运行操作参数。在检验中发现其中的酸性水管道如图1所示(编号:ASW-3101;工作压力:1.5MPa;工作温度:70℃;材质:20钢Φ60×6;介质:酸性水)特别是管道弯头,测厚检测最薄处厚度仅有2.8mm,与设计厚度6mm相比,减薄了3.2mm,壁厚减薄情况非常严重。(具体测厚部位见图1、测厚值见表1)。
A petrochemical plant restructuring and hydrogenation unit was completed and put into use in September 2002, has been running for 8 years and 6 months. The full test of the pressure pipe is the first test. The original design, installation information is not complete, only one-line diagram of pipe (with material and wall thickness) and the operation of the device operating parameters. In the test found that one of the acidic water pipes shown in Figure 1 (ASW-3101; working pressure: 1.5MPa; operating temperature: 70 ℃; material: 20 steel Φ60 × 6; medium: acidic water) Head, thickness measurement at the thinnest thickness of only 2.8mm, compared with the design thickness of 6mm, thinning of 3.2mm, thickness thinning is very serious. (Specific thickness of the site shown in Figure 1, the measured thickness in Table 1).