行业新闻 Industry News
金属自紧式法兰发展至今逾60年，该法兰一经问世就得到了欧美主要石油公司的追捧及认可并被大量使用于条件复杂的流体领域项目中。 其技术已非常成熟且至今未发生过一起因该产品自身质量问题而发生的安全事故。今天，在欧美能源企业的设备使用内部标准中，当管道压力超过class900后，使用金属自紧式法兰替代常规法兰已成为一种制度而被强制执行！
现在，自紧式法兰的鼻祖美国Grayloc的各项指标已得到ASME/DNV/ISO 9001等国际认证。
拉力试验：较传统法兰更能承受拉伸负载。比连接的管路本身更能承受拉伸负载。经破坏性测试，管路拉伸负载失效后自紧式法兰仍然完好无泄漏。
弯曲力试验：试验证明在承受大弯曲负载时自紧式法兰仍然不会泄漏及松脱。焊接管路后的自紧式法兰经多次冷弯测试后，接头处仍然无泄漏且螺
栓不松动。
压力试验：在正常使用中，自紧式法兰的接头及密封圈不可能承受过载压缩的情况。高压环境中，最大负载由管道的极限强度决定
Since the development of compact flange metal has more than 60 years, came upon the flange on the major oil companies in Europe and America have been sought after and recognized and is widely used in complex fluid field conditions the project. The technology is very mature and has not occurred with the quality of the product itself due to the accidents of the problem. Today, in Europe and the United States energy companies in the equipment using the internal standard, Dang Guan Dao pressure Chaoguo class900 Hou, use the metal flange Ti Dai Shi Zi bear has become a kind of system Changguifalan Erpi enforced!
Now, since the originator of tight flange of the United States Grayloc indicators have been ASME / DNV / ISO 9001 and other international certification.
Tensile test: more affordable than the traditional flange tensile load. The pipeline itself is more than the connection to withstand the tensile load. The destructive testing, pipe tensile load after failure of self-tight flange remained intact without leakage.
Bending strength test: test to prove that undergo large bending load from the flange still will not leak-tight and loose. Welded pipe flange after the self-tight test after repeated cold, joints, still no leak and Lo
Plug is not loose.
Pressure test: In normal use, self-tight flange joints and seals can not withstand compression overload situation. High-pressure environment, the maximum load of the ultimate strength of the decision by the pipeline