Dear sea friends, could you help check what the dimensions are for this flange and short pipe?
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Friends, could you please take a look based on the information in my picture? What are the specifications and dimensions of this flange, as well as the white short pipe below it? ? ? The flange’s perimeter is about 70 CM, it has 8 bolt holes, and its diameter is around 22 CM. After doing some research, I think the flange might be 4 inches in size, but I’m not entirely sure. Could any experienced friends help me verify this?
Measure the outer diameter of the flange and the outer diameter of the pipe; it seems to be 80
This post was last edited by niat8888 on 2020-12-30 08:23. Measure the outer perimeter of the flange. . It would be better to measure the outer perimeter of the tube. . . Perimeter / 3.14159 gives the outer diameter. Based on this, the perimeter of your flange is 700/3.14159=223mm. . It is speculated that the outer diameter of the flange is 220 or 225 mm. Bolt holes: 8-φ22 for the American system. 1. DN80 CL150 – flange outer diameter 190, bolt holes 4-φ18; 2. DN100 CL150 – flange outer diameter 230, bolt holes 8-φ18; 3. DN80 CL300 – flange outer diameter 210, bolt holes 8-φ22; 4. DN100 CL300 – flange outer diameter 255, bolt holes 8-φ22; 5. DN80 CL600 – flange outer diameter 210, bolt holes 8-φ22; 6. DN100 CL600 – flange outer diameter 275, bolt holes 8-φ26. For the European system: 1. DN80 PN10 – flange outer diameter 200, bolt holes 8-φ18; 2. DN100 PN10 – flange outer diameter 220, bolt holes 8-φ18; 3. DN80 PN16 – flange outer diameter 200, bolt holes 8-φ18; 4. DN100 PN16 – flange outer diameter 220, bolt holes 8-φ18; 5. DN80 PN25 – flange outer diameter 200, bolt holes 8-φ18; 6. DN100 PN25 – flange outer diameter 235, bolt holes 8-φ22; 7. DN80 PN40 – flange outer diameter 200, bolt holes 8-φ18; 8. DN100 PN40 – flange outer diameter 235, bolt holes 8-φ22; 9. DN80 PN63 – flange outer diameter 215, bolt holes 8-φ22; 10. DN100 PN63 – flange outer diameter 250, bolt holes 8-φ26. The outer diameter for DN80 PN63 seems to be incorrect. . But the deviation is way too large. . . I doubt the dimensions are accurate; they weren’t measured properly.
Based on the dimensions you measured and the data analysis from the 6th floor. Yours should be a DN100 pipe (the outer diameter is 108 or 114; it’s necessary to measure this again – using a string for measurement will give more accurate results than relying on the dimensions listed on the box), with flanges of DN100 PN10/16 (both pressure grades are the same, so they are interchangeable). Based on the picture, it seems to be a vent pipe for a pressure vessel (which likely has a large volume), or perhaps a pipe connection for instruments or something similar. The design pressure is estimated to be 1.0 or 1.6. Use single-head bolts; in China, most systems follow the European standards, and the flange thicknesses are also similar.
The expert has given so much information; I don’t quite understand it. Now it’s impossible to measure the outer diameter of the tube, so I can only guess. Could you please be more specific? Thank you