基于验证试验法的X80钢级大口径三通设计

Verification test method-based design of big-diameter X80 Tee-joint

为了更科学、准确地确定长输管道用X80钢级大口径三通的壁厚等设计参数,通过一系列X80三通的实物爆破试验开展验证试验法研究,采用三通塑性成型主支管壁厚减薄系数K值,建立了大口径三通壁厚设计计算公式,确定了系列X80钢级大口径三通壁厚等设计参数,形成了西气东输三线工程用X80三通技术条件。研究结果表明,推荐的X80大口径三通壁厚与采用面积补强方法确定的壁厚相比大幅减小,不仅节约了原材料成本,降低了产品生产难度,而且有利于进一步提高产品质量,为今后管道工程用大口径三通的设计和制造提供依据。

To more scientifically and accurately determine the wall thickness and other design parameters of big-diameter X80 T-joint for long-distance pipelines, verification test method research is carried out by using a series of physical burst tests for X80 T-joints. Wall thickness reduction coefficient K of main T-branch tube subject to plastic forming is used to build design calculation formula of big-diameter T-joint wall thickness to determine wall thickness and other design parameters of big-diameter X80 T-joint and form technical requirements of X80 T-joint for the Third West-to-East Gas Pipeline Project. As shown from research results, the recommended X80 big-diameter T-joint wall thickness is much less than the wall thickness determined by the area reinforcement method. The recommended method not only reduces costs of raw materials and production difficulty, but also further improves the product quality, which provides a basis to the design and manufacture of the big-diameter T-joint for pipeline projects in the future.