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一、前言在管道工业的历史上曾发生过多次的断裂事故,1950年在美国有一条直径30英寸的管线在试气时发生破裂。1960年美国一条输气管线破裂长达13公里,造成了严重的损失,欧洲也有破裂长达180公尺的记录。在我国管道破裂事故也曾多次发生,由大庆至铁岭的复线工程,在嫩江穿越处在试气时发生脆性断裂,裂纹扩展长达100公尺以上,由铁岭至秦皇岛管线在巨流河跨越处,在试水时由于高点有气,在断裂时发生较大的爆破事故,四川天然气管线在操作过程中由于应
I. INTRODUCTION In the history of the pipeline industry there have been many rupture accidents. In 1950, there was a 30-in. Diameter pipeline rupturing in the test run in the United States. In 1960, a gas pipeline ruptured up to 13 kilometers in the United States, causing serious losses. In Europe, there was also a record of rupturing up to 180 meters. Pipeline rupture in China has also occurred many times, from Daqing to Tieling double-track project in the Nenjiang through the trial of the brittle fracture occurs when the crack propagation up to 100 meters above the tunnel from Tieling to Qinhuangdao at the giant river crossing , When the test water due to the high point of gas, the rupture occurred in the larger blasting accident, Sichuan natural gas pipeline in the operation should be due to