Twin wall elbow is a kind of pipe fitting for connection, it is used for concrete pump pipe and hoses connection at the bend. Twin wall elbow has good wear resistance and high impact resistance, the HRC is 60－65, which can withstand the impact and wear of concrete in conveying system.
The twin wall pipe elbow have two layer. The outer is Q235 steel, and the inner layer is chrome alloy. The twin wall elbow not only has the wear-resistance of high alloy casting, but also has high mechanical strength and impact resistance.
Q235 widely used in buildings and engineering structures, it is good for elbow.
| C | Mn | Si | S | P |
| ≤0.20% | ≤1.4% | ≤0.35% | ≤0.045% | ≤0.045% |
The twin wall elbow inner layer is made of KmTBCr20Mo2 steel, and it is high wear resistance, which improve the twin wall elbow service life time, and decrease replaced changing cost.
| C | Si | Mn | Cr | Mo | Ni | Cu | P | S |
1.5 ~ 2.5% | ≤ 1.2% | 0.5 ~ 2% | 20 ~ 23% | 1.5 ~ 2% | 0.5 ~ 1.5% | 0.8 ~ 1.2% | ≤ 0.1% | ≤ 0.1% |
The twin wall elbow is designed with unequal thickness of wear resistant layer. The two ends and the middle part are more thicker, which is more practical and useful.
Twin wall elbow is used to change the direction of the concrete pipe. The commonly used angles are 90, 60, 45, etc.
Size | Radius | Degree | Brand |
2'', 2.5'', 3'', 3.5'', 4'', 4.5'', 5'', 6'' DN80, DN100, DN125, DN150 | R180, R225, R240, R275, R340, R375 etc | 15, 30, 45, 60, 90 | Putzmeister, Schwing, Sany, Zoomlion, XCMG, Liebherr etc |
Twin wall elbow is widely used in many industrial.
Please seal the elbow tightness when connect with pipeline or rubber hoses, which will not leakage and dangerous risk.