Then the wall thickness is 1 inch
30-inch (inside diameter) RCP has a wall thickness of 2.75 inches. Therefore, the outside diameter of 30-inch RCP is 35.5 inches.
For example a tube (hollow cylinder)with wall thickness 't' the outside diameter is: 1.00+2t So if the walls are 1.0mm thick the outside diameter is 1.20cm If there is no wall thickness the inside and outside diameter are the same. This seems a little too simple a question to ask here so I suspect the person asking the question has omitted some details or that they want an answer to a different question.
1/12th inside diameter plus 1 inch for 'B' wall (most common type), additionally, pipe sizes are normally in 1/4 or 1/2 foot increments, so the closest size would be a 24 inch diameter with 3 inch wall (24/12=2+1=3) having a outside barrel diameter thickness of 30 inches for 'A' wall 1/12th inside diameter, 'C' wall is 1/12th inside diameter plus 1 3/4 inch
14 gauge is 0.0641 inches or 1.63mm in diameter.
1 inch thick and 3 inches in diameter.
The US coin "quarter" (25 cents) is 0.955" in diameter, 0.069 inches thick
The inside diameter = 40 - 2 x 1.6 = 40 - 3.2 = 36.8 mm
Sometimes, it depends on how you use it. The most sensitive parts are outside (the clitoris) and a couple of inches inside (the G spot)
Diameter-0.016 cm Height-0.26 cm
According to Red Book specifications, a standard CD is 120 mm (4.75 inches) in diameter and 1.2 mm (0.05 inches) thick
Galvanised washers reduce rust (it's the dull grey 'painted/dipped' nuts and bolts) Inside diameter of 12mm, outside diameter of 24mm at 2.5mm thick. Plain washers are circular and flat.
It depends on how thick the wall is.