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首页> 外文会议>ASME international pipeline conference 2008 >BURST TESTS ON PIPELINE CONTAINING IRREGULAR SHAPED CORROSION DEFECTS
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BURST TESTS ON PIPELINE CONTAINING IRREGULAR SHAPED CORROSION DEFECTS

机译：含不规则形状腐蚀缺陷的管道上的爆破测试

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A corrosion defect can be considered as being of a regular shape if its defect depth profile is relatively smooth and the longitudinal area of metal loss is approximately rectangular.rnA corrosion defect can be considered as being of an irregular shape if its defect depth profile presents one or more major peaks in depth.rnIn this paper the burst tests of four tubular specimens are presented. In these tests the tubular specimens were loaded with internal pressure only. The specimens were cut from longitudinal welded tubes made of API 5L X80 steel with a nominal outside diameter of 457.2 mm (18 in) and a nominal wall thickness of 7.93 mm (0.312 in). Each of the four specimens had one external irregular shaped corrosion defect, machined using spark erosion. Measurements were carried out in order to determine the actual dimensions of each tubular specimen and its respective defect. Tensile specimens and impact test specimens were tested to determine material properties.rnThe failure pressures measured in the laboratory tests are compared with those predicted by six assessments methods, namely: the ASME B31G method, the RSTRENG 085dL method, the DNV RP-F101 method for single defects, the RPA method, the RSTRENG Effective Area method and the DNV RP-F101 method for complex shaped defects.
机译：如果腐蚀缺陷的缺陷深度轮廓相对平滑且金属损失的纵向面积大致为矩形，则可以将其视为规则形状.rn如果腐蚀缺陷的深度深度轮廓为1则可以将其视为不规则形状。或更多个主要的深度峰。本文介绍了四个管状标本的爆破测试。在这些测试中，管状样品仅承受内部压力。从API 5L X80钢制成的纵向焊接管上切下样品，其标称外径为457.2毫米（18英寸），标称壁厚为7.93毫米（0.312英寸）。四个试样中的每个试样都有一个外部不规则形状的腐蚀缺陷，该缺陷使用火花腐蚀机加工而成。为了确定每个管状样品的实际尺寸及其相应的缺陷，进行了测量。对拉伸试样和冲击试样进行测试以确定材料性能。rn将实验室测试中测得的破坏​​压力与通过六种评估方法预测的破坏压力进行比较：ASME B31G方法，RSTRENG 085dL方法，DNV RP-F101方法单一缺陷，RPA方法，RSTRENG有效面积方法和DNV RP-F101方法用于复杂形状的缺陷。

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