Boiler Erosion Shields
To reduce excess wear of boiler tubes within the extreme conditions prevalent inside a fossil fuel fired boiler, we are able to manufacture and supply boiler erosion shields to protect and reduce wear in all applicable boiler related situations. Boiler erosion shields to suit any O/D tube can be manufactured from various alloys and stainless steel materials.
Ash content, high furnace temperature, increased sootblower pressure and longer time between cleans – all these things result in the likelihood of greater erosion to boiler tubes.
In such cases, the most effective course of action is to shield the erosion prone tubes with boiler erosion shields. This alternative is far cheaper than the actual replacement of damaged sections of boiler tubes, to say nothing of the associated downtime and loss of generation capacity and revenue that occurs with a tube leak.
Shapes and specifications of tube shields
The cross-sectional shape of boiler tubes shields is mostly semi-circular (180 degrees), and there are also 120-160 degrees. It is mainly used on finned tubes (water-cooled walls); boiler tube erosion shields are divided into direct wear-resistant shields, in-curve, anti-wear shields, outer-curve, anti-wear shields, side-curve anti-wear shields, s-curve anti-wear shields, etc.
Tube shields-outside bend and side bend types
The length of the straight anti-wear shields ranges from 20mm to 3000mm, and the general length of 1000-2000mm is commonly used. The anti-wear shields with bends generally requires a processing drawing and the following parameters should be on the drawing: outer diameter of the pipe used, bending of the pipe Radius R (to the center of the pipe), the degree of bending angle, and the length of the straight sections on both sides of the arc segment of the wear-resistant shields.
“snap-on” type shield
The most basic parameter of boiler tubes shields is the outer diameter of the tube used (that is, the inner diameter of boiler tubes erosion shields). The main specifications of the tube are: 32, 38, 42, 44.5, 48, 51, 57, 60, 63.5 , 76, 89mm, etc . the inner diameter of the boiler tubes erosion shields is usually 1-3mm larger than the outer diameter of the tube used, depending on the actual requirements.
Tube shields production process
To ensure the accuracy of the material. Positive Material Identification (PMI) of stainless steel sheets for tube shields is critical to verifying the grade and composition of stainless steel before it goes into production.
Tube shields from us are manufactured to exacting standards. Advanced equipment and material handling capabilities permit us to offer the fastest turnaround times anywhere.
The current production process for tube shields is to use high-pressure presses and professional moulds for pressing.
The production time is short, the welding performance is good, the welding seam does not fall off, the surface is smooth and the appearance is beautiful. The arc-shaped wear-resistant tile is pressed on a press or bent on a pipe bender with a special mould.
