CST Twin-wall Elbow for Concrete Pump
ChangSha Talent (CST) concrete pumping elbows and bends are unique in designs and excellent in pumping performance.
Strengthened for 6-80,000m³ service life
OEM pipe elbow for Zoomlion, XCMG, Schwing
Compatible with Sany, Putzmeister, CIFA
Unique patented Twin-wall Two-halves design
Balance of weight, wear-resistance and cost
Million of elbows are sold till now
CST Two Wall Concrete Pump Pipe Elbow Structure
- â‘ Convex Half Inner layer: high chromium cast iron, Its center area has been thickened to add extra wear-resistance.
- â‘¡ Concave Half Inner Layer: highly wear-resistant 6mm-thick bearing steel.
- â‘¢ Outer protective layer: high-strength Q355 forged shell.
- â‘£ Inner Two Ends: 35mm-long high chromium cast iron, with hardness over HRC 62.
CST concrete pumping pipe elbow is a Patented Innovation with US Patent No.: US 10,428,994 B2, please check out patent to have more information.
Elbow for concrete pump product specifications
(Please contact us for a full catalog)
| Part No. | Nominal Diameter | Radius of elbow | Degree of elbow |
| 125XR275-90 | 125 | 275 | 90 |
| 125XR180-90 | 125 | 180 | 90 |
| 125XR190.5-90 | 125 | 190.5 | 90 |
| 125XR240-6 | 125 | 240 | 6 |
| 125XR240-9 | 125 | 240 | 9 |
Elbow with extensions for concrete pump product specifications
(Please contact us for a full catalog)
| Part No. | Nominal Diameter | Radius of elbow | Degree of elbow | Extensions |
| 125XR180-90+110 | 125 | 180 | 90 | 110 |
| 125XR180-90+135 | 125 | 180 | 90 | 135 |
| 125XR180-90+225 | 125 | 180 | 90 | 225 |
| 125XR180-90+360 | 125 | 180 | 90 | 360 |
| 125XR180-90+600 | 125 | 180 | 90 | 600 |
| Part No. | Nominal Diameter | Radius of elbow | Degree of elbow | Extensions |
| 125XR190.5-90+19+19 | 125 | 190.5 | 90 | 19, 19 |
| 125XR190.5-90+69+69 | 125 | 190.5 | 90 | 69, 69 |
| 125XR190.5-90+159+159 | 125 | 190.5 | 90 | 159, 159 |
| 125XR275-45+108+108 | 125 | 275 | 45 | 108, 108 |
Technological innovations of CST concrete pump elbow
Structural innovation
Dual-layer, split structure, gradual thickening from both ends and sides towards the middle, strengthening the wear-resistance of the convex side of the elbow.
Material matching
High-carbon and high-toughness high chromium cast iron is used for the easily worn parts, while cost-effective bearing steel is used for the less impacted areas.
Process optimization
Multiple processes are used, such as casting for the inner of the Convex Half and die forging for the Concave Half inner lining, and welding is used in combination.
Technical characteristics of CST concrete pump elbow
Precise reinforcement of vulnerable areas
â—Ž Improved wear resistance of materials in vulnerable areas;
â—Ž Different thickness design of wear-resistant layer in vulnerable areas.
Wear-resistant material matching
â—Ž Developed a high-carbon, high-chromium, high-toughness cast iron through collaboration with researchers within factory and university, which features excellent wear resistance, impact resistance, high toughness, and strength;
â—Ž Cost-effective bearing steel material is used for the wear-resistant layer of the inner layer of Concave Half, which is formed by die forging.
Multiple process combinations
â—Ž Multiple process combinations achieve mass production of parts with reduced costs;
â—Ž Casting is used for the inner liner of the Convex Half, and molding is used for its outer layer. While, double-layer integral die forging and integral quenching are used for the Concave Half. The precision of the Halves is guaranteed by special machine tools, and automatic welding machines are used for welding.
Strict quality control & manufacturing process of elbow for concrete pump
| Key control point | Key control parameters | |
| 1 | Half-bend casting of high-chromium cast iron | Casting quality and deformation |
| 2 | Heat treatment of highchromium cast iron | Hardness and micro-structure |
| 3 | Die forging of GCr15 Concave Half | Size and deformation |
| 4 | Heat treatment of GCr15 Concave Half | Hardness and micro-structure |
| 5 | Elbow assembly and riveting / welding | Dimension and welding quality |
（Key control point of concrete pump straight pipelines production）
Quality control of raw materials for concrete pump pipe
