The classification method of PPR elbow and how is it expressed?
Posted by Admin | 11 Aug
The classification method of PPR elbow can be divided into long radius elbow and short radius elbow according to its radius of curvature. Long radius elbow refers to its radius of curvature equal to 1.5 times the outer diameter of the pipe, that is, R=1.5D. A short radius elbow means that its radius of curvature is equal to the outer diameter of the pipe, that is, R=D. D in the formula is the diameter of the elbow, and R is the radius of curvature. According to the pressure level, there are about seventeen kinds, which are the same as the American pipe standards, including: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, Sch100, Sch120, Sch140, Sch160, XXS, of which the most commonly used are STD and XS. According to the angle of the elbow, there are 45o elbow, 90o elbow and 180o elbow.
There are many types of elbows. When ordering, the order is often expressed as follows: such as "LR STD 90o 8", which means long radius, pressure grade of STD, 90o 8" elbow; another example, "SR XS 45o 4" Indicates short radius, pressure rating XS, 45o 4" elbow. The above is the approximate classification of elbows. 1_092014310.jpg There are generally two types of tee. The diameter of the three ports is equal to the equal diameter tee, the diameters of both ends are the same, but the diameter of the confluence end is different from the other two diameters, which is called a reducing tee.
For an equal diameter tee, such as "T3" tee, it means an equal diameter tee with an outer diameter of 3 inches. For reducing tee, such as "T4 x 4 x 3.5" means a reducing tee with a same diameter of four inches and a reduced diameter of 3.5 inches. The pressure rating and the pressure rating of the elbow are the same, and the specification range is the same.
The size of the head is also the division method. The representation method of the big head is the diameter of the big head multiplied by the diameter of the small head. For example, "8×6" means that the diameter of the large head is 8 inches and the diameter of the small head is 6 inches.