Technical requirements for wear-resistant elbows and tees in pneumatic ash transport systems
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Technical requirements for wear-resistant elbows and tees in pneumatic ash transport: All elbows and tees used in pneumatic transport pipelines are made of composite steel pipes with a wear-resistant ceramic lining of the backpack type. The thickness of the ceramic lining is over 4 mm, with an alumina content of over 92%. The thickness of the outer steel pipe is 10 mm or more (according to national standards); the thickness of the backpack structure is not less than 60 mm, and it is filled with wear-resistant casting material. The thickness of the backpack shell itself is not less than 3 mm. The bending radius is R=950, and the service life is at least 50,000 hours. For ceramic wear-resistant pipes, steel pipes with a ceramic lining should be used. 1. 90° wear-resistant elbows, DN100, quantity: 13.00; details see Figure 2. 90° wear-resistant elbows, DN100, quantity: 1.00; used for assisting in blowing, details see Figure 3. Wear-resistant tees, DN100, quantity: 3.00; details see the drawings
Precautions for wear-resistant elbows in ash transfer pipelines: 1. There are two connection methods for wear-resistant elbows in ash transfer pipelines: flange connection and welding. 2. Regarding the inner diameter requirements for the wear-resistant elbows in ash transfer pipes, the DN value is generally indicated in the material specifications; the addition of a ceramic layer to the pipes reduces the inner diameter, so it is necessary to increase the outer diameter of these wear-resistant elbows. 3. The ceramic layer of the wear-resistant elbow in the ash transfer pipeline has a smooth surface, no cracks, and high density.