俄罗斯高寒地区油气管道压力试验技术

保障中俄原油管道安全运行具有重要意义。俄罗斯高寒地区管道运行管理方面具有先进经验。筛选了俄罗斯管道压力试验技术标准,结合国内管道压力试验工程实践,研究了中俄管道压力试验关键技术的差异,包括试压管段划分、试压介质、强度试验压力、站场工艺管道试压等。俄罗斯管道压力试验先进技术包括管道压力试验渗漏检查方法、零度以下管道压力试验技术、在役管道强制性和周期性压力试验和压力试验安全措施等。最后,针对借鉴俄罗斯压力试验标准,提高我国管道压力试验技术水平,提出了建议。

中俄管道试压标准差异分析

为保障国内长输管道通过高寒冻土区的运行安全,梳理了中俄两国的管道试压标准。从试压管段划分、试压介质、强度试验压力、密封性试验压力和稳压时间、输油气站工艺管道试压、管道试压渗漏检查方法、零度以下试压技术、强制性试压(重新试压和周期性试压)、试压监测管段、试压安全措施和环境保护等方面研究了中俄标准的相关规定,分析了不同标准之间的差异。介绍了俄罗斯标准关于高寒地区强度试压的特殊要求,以及试压环境保护等方面的先进理念,针对我国管道试压标准完善和制修订提出了建议。

Experimental study on pressure fluctuation characteristics of slug flow in horizontal curved tubes

In order to study the pressure characteristics of slug flow in horizontal curved tubes,two kinds of curved tubes with central angle 45° and 90° respectively are studied,of which are with 0. 5m circumference and 26 mm inner diameter are used. When the superficial liquid velocity or the superficial gas velocity is constant,the pressure fluctuations and the probability distribution of the average velocity of slug flow are clear for all of the five experimental conditions. The results of experiment show that the pressure characteristics of slug flow in curved tubes have periodic fluctuations. With the rise of central angle,the period of pressure fluctuation is more obvious. The system pressure of the slug flow increases with the increasing of superficial liquid/gas velocity. Meanwhile,the probability distribution of pressure signal shows regularity,such as unimodal,bimodal or multimodal.