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It is the radius of bend of the elbow with reference to a point,the point is determined by the intersection of two lines from the elbows socket end (which makes the shape of one quater of a circle). The bend ie; 1.5d,3d,5d,10d is determined from that point of intersection as a multiple of elbows diameter.

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Q: How do you know a 3d or 5d bend?
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How much is the center of a 45 degree elbow?

4 inch 5d bend 45degree elbow center how much


What is -5d plus 40 equals 5d?

3d is visual, 4d is visual and interactive such a a 3d rollercoaster ride where the chair tilts, i'm guessing 5 and 6d will be full immersion with surround screen so it is all around you with holographic characters that look like they are standing next to you, maybe with temperature fluctuations and the long anticipated smell-o-vision!!


How do you make 75 cents only using pennies nickels quarters and dimes?

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What is the difference between a 3d bend and a 3R ell?

There is no difference. Different suppliers and contractor describe the same situation with 3R or 3D. Here is how to think about it. A piping segment is formed or bent at a radius. The radius is measured at the centerline of the bend. The radius of the bend centerline is 3 times the nominal diameter of the piping segment being bent. 3R means the bend radii is three times the nominal pipe diameter. 3D means three times the nominal pipe diameter is the bend radii of the piping segment. Caution don't begin to convert 3R to 1.5D. Not applicable with this terminology. Standard long ells can be purchased with 3R bends, being 10 inch pipe ells have a bend radii of 30 inches.


Factor ac - 5ad - 5bc - 25bd?

a(c - 5d) - 5b(c + 5d)