Classification of elbow fittings in plumbing fittings

Classification of elbow fittings in plumbing fittings

The classification method of elbow pipe fittings in plumbing pipe fittings can be divided into long-radius elbows and short-radius elbows according to the radius of curvature of elbow pipe fittings. A long-radius elbow refers to the outer diameter of the tube whose radius of curvature is equal to 1.5 times, that is, R = 1.5D. A short-radius elbow means that its radius of curvature is equal to the outer diameter of the tube, that is, R = D. where D is the elbow diameter and R is the radius of curvature. If divided according to the pressure level of elbow pipe fittings, there are about seventeen kinds, and the American pipe standards are the same, including: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, Sch100, Sch120, Sch140, Sch160, XXS, among which STD and XS are commonly used. According to the angle of the elbow pipe fittings, there are 45O elbows, 90o elbows and 180o elbows. In this way, there are many types of elbow fittings, and orders often take the following representation methods: such as "LR STD 90o 8", which represents a long radius, pressure rating of STD, and an 90" elbow of 8o; As another example, "SR XS 45o 4" represents a 45" elbow with a short radius and a pressure rating of XS, 4o. The above is the approximate classification of elbow pipe fittings.