Is there a difference between metric pipes and imperial pipes?
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May I ask if there is a difference between metric pipes and imperial pipes? Thank you! Can the current 108/4 piping be welded with imperial and metric flanges?
It’s a British-style flange, and the outer diameter of that port is 114. . The outer diameter of your 108 cannot be properly connected to it. .
British-style pipes and metric pipes refer to whether the series of outer diameters for pipes is an internationally standard series or a domestically used series, corresponding to different outer diameters of pipes. When purchasing flanges, the outer diameter and wall thickness of the pipe fittings should be specified to ensure that the flange matches the pipe.
The main difference lies in the outer diameter; for projects in China, it is recommended to use pipes, fittings, and flanges from the metric series, as the imperial series is commonly used internationally；
What kind of pipe should be used? It’s better to have uniformity starting from the source. . British standard pipes are commonly used internationally. . It can also be used for domestic projects. It’s no problem for procurement.
The DN100 specification definitely differs between metric and imperial systems: one is 114.3 and the other is 108, so there is a significant difference in outer diameter