NB = inside diameter of the tube.
OD = outside diameter of the tube.
27.2 kg/meter for 100 NB Simless pipe
A 250 NP pipe is a pipe that is 250 millimeters in diameter and is 10 inches long. It comes in a variety of thicknesses. NB stands for nominal bore. Sometimes this is referred to as NPS which stands for nominal pipe size. NB is a standard for pipe sizes in North America.
Nominal bore which is designation for pipe size.
id means inside diameter, od means outside diameter, copper pipe and tubing is measured by the od, therefore the od the pipe or tubing will be the same as the id of the fitting
The first difference is actually pipe vs tubing. Pipe is measured at the inside diameter or ID vs tubing being measured at the outside diameter or OD. Dies for bending pipe and tubing are different because of the different measurements. A mandrel is pulled through tubing or pipe to keep the inner diameter constant.
what is difference between NB & OD in pipe size
14" and above
Pipe is identified by NB and thickness is defined by Schedule whereas Tube is identified by OD. For more detail about piping click here : http://pipingguide.blogspot.com/
In pipe sizing, nominal bore (NB) is used to indicate the approximate internal diameter of a pipe, while the outside diameter (OD) is the actual measurement across the pipe's exterior. For pipes sized 14 inches and above, the NB is equivalent to the OD because these larger pipes are often constructed to a standard where the wall thickness is relatively uniform, making the internal and external measurements more closely aligned. This simplification helps in standardizing pipe sizes for ease of specification and installation in larger applications.
The unit weight of a 60 NB (nominal bore) pipe depends on the material it is made from. For example, for a steel pipe with a nominal bore of 60 mm, the approximate unit weight can be calculated using the formula: Unit Weight = (outer diameter - thickness) x thickness x 0.024661.
the inner diameter of the pipe Nominal bore (NB) is 40 mm
27.2 kg/meter for 100 NB Simless pipe
A 250 NP pipe is a pipe that is 250 millimeters in diameter and is 10 inches long. It comes in a variety of thicknesses. NB stands for nominal bore. Sometimes this is referred to as NPS which stands for nominal pipe size. NB is a standard for pipe sizes in North America.
To find the outer diameter (OD) of a pipe ranging from 1 to 10 inches, you can refer to standard pipe size charts, which specify the OD for different nominal pipe sizes. For instance, a 1-inch nominal pipe typically has an OD of 1.315 inches, while a 10-inch nominal pipe has an OD of 10.750 inches. Additionally, you can measure the pipe directly using a caliper or tape measure if you have access to the physical pipe.
NB is nominal bore of that pipe, that doesn't mean that the pipe diameter (Inner or Outer)will be equal to the NB, but it is an digit nearest to the out side diameter of the pipe. That digit will be an easily memorable one like 25, 20, 32, 40 etc (Not like 23.25, 27.5, 41.8 etc). In standard pipes, the NB and the outside diameter will be same from 14 inches and above...
Nominal bore which is designation for pipe size.
YES