根据轴向体积流动规律导出了法兰环件轧制尺寸变化规律和其各种轧制用毛坯的体积分配规律。

The volume flow amount is also calculated. The dimension variation law for rolling flange ring and the volume distribution law for its rolling blank are derived from the axial volume flow.

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我厂主要生产各种高、中、低压法兰，环件、锻件、齿轮及异型法兰。

I plant mainly produces all kinds of high, medium, low flange, ring, forging, gear and special flange.

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在安装系列4700夹管阀时，建议在阀门法兰后面采用镀锌钢支撑环加固。

When installing the Series 4700, it is recommended that galvanized steel back up rings be used behind the valve flanges.

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