标准B16.1 -包括铸铁管道法兰和法兰连接件(125磅级和250磅级)。
A. N. S. I. Standard b16.1-covers cast iron pipe flanges and flanged fittings (Class 125 and 250).
平焊法兰连接法也是与铸铁管及钢管之间简单的连接方法。
The connection method between the simple flange connection method and cast iron pipe and steel pipe.
铸铁管道法兰和法兰连接件，125磅，符合相关法兰钻孔尺寸标准。
Cast Iron Pipe Flanges and Flanges Fittings, 125 LBS. Conforms to related flange drilling.
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