What is Elbow
Elbow is a pipe fitting used to change the direction of pipelines in piping systems, primarily applied in plumbing and heating installations.
Classification by Angle:
Standard angles: 45°, 90°, 180°.
Non-standard angles (for special engineering needs): 60°, etc.
Defined as an elbow when the bending radius ≤ 1.5 times the pipe diameter.
Materials & Connection Methods:
Materials: Cast iron, malleable iron, stainless steel, alloy steel, carbon steel, non-ferrous metals, and plastics.
Connection methods: Direct welding, flange connection, hot-melt connection, electrofusion connection, threaded connection, and socket connection.
Manufacturing Processes:
By production method: Welded elbow, stamped elbow, push-formed elbow, cast elbow.
Key production techniques:
Hot push forming (uniform wall thickness, continuous operation – primary method for carbon steel elbows).
Stamping forming.
Plate welding.
Surface treatment: Shot blasting and anti-corrosion coating.
Packaging: Large individual pieces require independent boxes with labeled dimensional parameters.
Applications:
Widely used in chemical, construction, petroleum, power generation, shipbuilding, and other engineering fields. Elbows serve two key functions in piping systems:
Directional change.
Connecting pipes of different diameters.
Specification
| Material | Stainless Steel ASME / ASTM SA / A403 SA / A 774 WP-S, WP-W, WP-WX, 304, 304L, 316, 316L, 304/304L, 316/316L, DIN 1.4301, DIN1.4306, DIN 1.4401, DIN 1.4404 |
| Dimension | ANSI B16.9, ANSI B16.28, MSS-SP-43 Type A, MSS-SP-43 Type B, JIS B2312, JIS B2313 |
| Thickness | Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and etc. |
| Size | 1/2 inch–48 inch (For larger pipe fittings, customized design and manufacturing are usually required) |
| Material | Carbon Steel ASME / ASTM SA / A234 WPB, DIN 1.0405 |
| Dimension | ANSI B16.9, ANSI B16.28, JIS B2312, JIS B2313 |
| Thickness | Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and etc. |
| Size | 1/2 inch–48 inch (For larger pipe fittings, customized design and manufacturing are usually required) |
Elbows size table
