Stainless steel pipe caps are a type of stainless steel pipe fitting. The main materials for stainless steel pipe fittings include 304, 304L, 316, and 316L, which feature strong corrosion resistance, high mechanical properties, and long service life. Connection methods include butt welding, socket welding, and press-fitting. Stainless steel pipe fittings are widely used in pipeline construction and installation in industries such as water supply and drainage, sanitary and pharmaceutical manufacturing, food production, petrochemicals, shipbuilding, and papermaking.
Based on their radius of curvature, they can be divided into long-radius elbows and short-radius elbows. A long-radius elbow has a radius of curvature equal to 1.5 times the outer diameter of the pipe, i.e., R=1.5D; a short-radius elbow has a radius of curvature equal to the outer diameter of the pipe, i.e., R=1.0D. (D is the elbow diameter, and R is the radius of curvature). If classified by pressure rating, there are approximately seventeen types, which are the same as the American pipe standards: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, Sch100, Sch120, Sch140, Sch160, XXS; among which STD and XS are the most commonly used.
