承压钢管柔性密封接头的性能-《焊管》

文章信息/Info

作者:: 肖国章1; 高　霞1; 2 编译; 1. 宝鸡石油钢管有限责任公司，陕西宝鸡 721008；
2. 国家石油天然气管材工程技术研究中心，陕西宝鸡 721008

Author(s):: Edited and Translated by XIAO Guozhang 1; GAO Xia 1; 2; 1. Baoji Petroleum Steel Pipe Co., Ltd., Baoji 721008, Shaanxi, China;
2. Chinese National Engineering Technology Research Center for Petroleum and Natural Gas Tubular Goods, Baoji 721008, Shaanxi, China

Keywords:: steel water pipe; gasket joint; rolled groove joint; Carnegie-type joint; bell end; spigot end; cold forming; ; quality control

摘要:: 钢管系统中典型的接头形式包括无约束的橡胶密封式、约束式的现场焊接式、法兰连接、管箍连接和伸缩接头。针对钢管和其他用途材质的管道最常见的不受约束的密封接头，介绍了美国水工程协会（AWWA）供水实践手册M11的钢制水管章节中滚压沟槽式和卡内基式两种主要类型密封接头的设计和安装，讨论了滚压沟槽接头的发展、设计以及制造过程中的质量控制，同时比较了与卡内基式接头的相似和不同之处。沟槽接头的破坏性试验结果显示，承口端和插口端的冷成型不影响钢管的质量和强度。五十多年的应用表明，滚压沟槽接头管道直径可达1 981.2 mm（78 in），最大工作压力为1.72 MPa（250 psi），允许瞬时最大压力为2.59 MPa（375 psi），接头不需要购买或单独进行焊接，经济性良好。

Abstract:: Typical joints specified in steel pipe systems include the non-restrained rubber-gasket-type, restrained field-welded-type, flanges, couplings and expansion joints. Since joints are often perceived as the weak-link in a pipeline, it is important for engineers to have a clear understanding of the capabilities of a particular joint design, quality control practices followed during manufacture, and most importantly, a sound track record of its performance over many decades of use. Gasket-joints are the most common non-restrained jointing system specified not only for steel pipes but also for other commonly-used pipe materials. It is therefore important to have a clear understanding of their design and performance. The two main types of gasket joints permitted by the American Water Works Association (AWWA) Manual of Water Supply Practices M11-Steel Water Pipe: A Guide for Design and Installation includes the Rolled Groove type and the joint. The former is widely specified for pipe diameters up to 1 981.2 mm(78 in) and 1.72 MPa(250 psi) maximum working pressure, with an allowable maximum transient pressure of 2.59 MPa(375 psi), though larger diameters and higher pressures can also be accommodated. This paper primarily discusses various aspects of the rolled groove joint, but sufficient information is provided on the Carnegie to highlight both similarities and differences.