With the size of American Standard flange CLASS300 DN15, why the minimum can only find DN20
Maybe the standard you're looking for is wrongThe small size of the flange American Standard standard is the minimum ASME B16.5 which is 1/2 "marked metric is DN15To Baidu, B16.5 can be found, and DN15 size on the control of 1/2"
Minimum DN15. The first one is DN15. 1/2"
There are CLASS300 DN15 HG20592-20635-2009 standard
