The flange sealing surface should be smooth and clean, to seriously clean up oil and rust during installation.
法兰密封面应平整清洁，安装时要认真清理油污和锈斑。
ANSI flange sealing principle is extremely simple: the two bolts each other extrusion flange sealing surface and form a seal gasket.
ANSI法兰的密封原理极其简单：螺栓的两个密封面相互挤压法兰垫片并形成密封。
All accessory interfaces should have protection covers with good sealing, there is no damage on the connecting screws and flange sealing surface.
组件所有外露接口均设有防护堵、盖，且封闭良好，接口螺纹和法兰密封面无损伤；
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