For example: refers to the length of the inside diameter! There are icons to note the best!
The nominal diameter of the 1. flange refers to the inner diameter of the pipe to be matched with each other;2. the nominal diameter of the pipe is the inner diameter of the pipe (the diameter of the inner hole).
The nominal diameter of the flange does not mean any flange nominal diameter, but only the specifications of the flange, the specific size should refer to the flange standard! For example, DN100 does not mean that the flange diameter is 100, depending on the flange pressure, the specific size of the standard.Similarly, the nominal diameter of the pipe does not mean the specific size, the specific size should be checked according to the pipe numberIndustrial parameters, plus nominal two, do not refer to exact dimensions, but to a class. The exact size should be checked against the corresponding standard
The nominal diameter of the 1. flanges does not mean any flange nominal diameter, but only the specifications of the flange. Refer to flange standard for specific dimensions. For example, DN100 does not mean that the flange diameter is 100, depending on the flange pressure, the specific size of the standard.2. nominal diameter of the pipe does not mean the specific size, the specific size should be based on the pipe number, check the standard.3.DN: dimensional identification of combinations of letters and numbers used in piping system components. It consists of letters DN and followed by dimensionless integer numbers, which are directly related to characteristic sizes such as the aperture or outer diameter (expressed in mm) of an end connector.Note 1: unless otherwise specified in the relevant standards, the figures behind the letter DN do not represent measurements or are used for computational purposes.Note 2: the standards used in the DN marking system shall give the relation between the DN and the size of the pipe element, such as DN/OD or DN/ID.
