DN is the two letters that we often see in a list of everyday pipe fittings or articles. In fact, the meaning of the expression is the nominal standard of the metric unit, not the actual measurement value (details see gb/t1047) standard;
NPS refers to the nominal size of an inch unit tube, as is the meaning of the DN and is not the actual measurement.
The letter R, we all understand, refers to the radius of the elbow or bend the symbol of the radius.
T refers to the flip side of the short section of Baidu,
T refers to the thickness of the welding end of the same diameter or reducer.
T1 refers to the diameter of the small end of the welding end of the specified thickness.
The letter “O” refers to the distance from the center of one end of the 180 degree elbow or elbow to the center of the other end surface.
M refers to the distance between the center line of the four-way body and the end of the branch pipe.
H refers to the overall length of the size head.
A refers to the 90-degree elbow center height, is the 180-degree elbow Center to the end of the length of the center.
B refers to the distance between the four branches of the outlet axis and the end of the center body.
D refers to the behavior of three-links, elbows, four-pass, the head of the groove at the outside diameter size.
F refers to the total length of the short section of the flanging.
G refers to the outer diameter of the flanging of the flanging short section.
