Twin wall Elbow


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.


DN125 DN150 twin wall elbow for Putzmeister Sany Schwing zoomlion concrete pump


Twin wall elbow specification


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.


Outer layer Q235

Q235 widely used in buildings and engineering structures, it is good for elbow.



Inner layer: KmTBCr20Mo2

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.


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%


Twin Wall Elbow Feature

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.

  • Good wear resistance.
  • Heat resistance.
  • Corrosion resistance: twin wall elbow contains a high percentage of metal chrome, so it has the ability of rust prevention and corrosion resistance.
  • High mechanical properties.
  • High impact resistance.
  • High toughness.
  • Environmental protection.


Supplying range

Twin wall elbow is used to change the direction of the concrete pipe. The commonly used angles are 90, 60, 45, etc.






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.

  • Oil transportation.
  • Natural gas transportation.
  • Liquid transportation.
  • Engineering bridge construction.
  • Concrete transportation.
  • Concrete pump equipment connection.


Please seal the elbow tightness when connect with pipeline or rubber hoses, which will not leakage and dangerous risk.