Compact Flanged Connections for High Temperature Applications

Compact Flanged Connections for High Temperature Applications
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适用于高温应用的紧凑型法兰连接

DOI：
10.1115/pvp2002-1088
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发表时间：
2002
期刊：
--
影响因子：
--
通讯作者：
Frank Woll
Frank Woll
中科院分区：
--
文献类型：
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作者：
Sjur Lassesen;Frank Woll

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Steelproducts Offshore紧凑型法兰系统（SPO CFS）已被证明是石油和天然气行业的一种非常好的法兰设计，其工作温度通常在−100°C至+250°C之间。高可靠性、小尺寸和低重量是海上工业所欣赏的特性。该设计依赖于高螺栓预张力，以获得双重密封能力和静态性能。对于有限的温度，可以施加高预张力，而不会在达到工作温度时失去预张力。对于高温，在设计连接时，需要仔细评估和考虑法兰和螺栓中与温度相关的材料特性。为了研究法兰性能，如螺栓张力、法兰应力和密封接触，进行了有限元分析，模拟从法兰组装到工艺启动和关闭的所有相关阶段。为了预测翼缘的性能，采用了相对简单的分析方程，从而为选择螺栓材料、预应力和翼缘面角提供了依据。对于处理高达720°C温度的过程工业，现在可以使用紧凑型法兰。使用紧凑型法兰连接首先会提高法兰连接的可靠性，减少维护的需要。版权所有© 2002 by ASME
The Steelproducts Offshore Compact Flange System (SPO CFS) has proven to be an exceptionally good flange design for the oil and gas industry with service temperatures normally ranging from −100°C to +250°C. High reliability, small size and low weight are properties the offshore industry has appreciated. The design relies on a high bolt pre-tension in order to obtain the double sealing capability and the static behavior. For limited temperatures, the high pre-tension can be applied without any risk of loosing the pre-tension when the operating temperature is reached. For high temperatures, the temperature dependent material properties in flange and bolt need to be carefully evaluated and taken into account when designing the connection. Finite element analysis simulating all relevant phases from flange make-up to process start up and shut down have been performed in order to study flange behavior such as bolt tension, flange stresses, and seal contact. Relatively simple analytical equations have been used in order to predict the flange behavior and hence been basis for choosing bolting material, prestress and flange face angle. For process industry dealing with temperatures up to 720°C, it is now possible to use compact flanges. The use of compact flanged connection will first of all increase the reliability of the flanged connection, reducing the need for maintenance.Copyright © 2002 by ASME