Insane Hydraulics
Bold and audacious blog about fluid power
This interactive drawing provides recommended dimensions for heads of flanged connectors. You can download the drawing for the selected type/size in PDF format by pressing the button under the drawing. Additionally, you can add a note to the downloaded file by filling in the text field below.
The flanges conform to standards SAE J518 code 61 (medium and low pressure) and 62 (high pressure), or ISO 6162-1 and 6162-2 (basically the same thing). Very often, and this is especially true for Portugal, people refer to them as "SAE-3000" and "SAE-6000" flanges, implying that figures 3000 and 6000 denote their pressure rating in PSI. This is only true for code 62 flanges, which are indeed rated for the working pressure of 420 bar across all sizes. Code 61 flanges, on the other hand, have pressure ratings ranging from 350 bar (5000 PSI) for DN13 and DN19, all the way to 35 bar (500 PSI) for DN89 and above. The recommended maximum working pressure is also included in the drawing.