应用有效面积法评价管道剩余强度实用性研究

Residual Strength Evaluation of Corroded Pipeline Based on Effective Area Method

定期开展腐蚀管道剩余强度评价工作,对指导管道维护维修、保证管道安全运行具有重要意义。有效面积法是一种重要的管道剩余强度评价方法。提出了一种适用于有效面积法的腐蚀缺陷测量方法,该方法能够对管体腐蚀形貌进行详细描述;根据有效面积法计算模型编制了计算机程序,对某管道实际腐蚀缺陷进行了计算求解。结果表明,应用有效面积法的计算结果高于Modified B31G评价方程的计算结果,即保守性较低。

The residual strength evaluation of corroded pipeline carried out regularly was significant for guiding pipeline maintenance and operation safety.Effective Area Method, an important residual strength evaluation technique, was studied.A corrosion defect measure method was proposed, which was suitable for the Effective Area Method.The computer program was compiled according to the calculation model of Effective Area Method.The residual strength of an actual pipeline defect was evaluated by the Effective Area Method and Modified B31G respectively.The result showed that the Effective Area Method was less conservative than Modified B31G.