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Tube erosion shields

Tube shield

Tube shield help reduce excessive wear on boiler tubes under the extreme conditions prevalent in fossil fuel-fired boilers.

Tube Shields

production process

The current production process for tube shields is to use high-pressure presses and professional moulds for pressing.

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Advantages

Tube shields are custom made to fit perfectly to straight sections, curved sections and even finned and specialised tubing.

Boiler tube erosion shields, also known as anti-corrosion shields, anti-wear plate, anti-wear protection shields, anti-wear cover plate, anti-corrosion cover plate, boiler climbing pipe, anti-wear pressure plate, etc. , which are used in combination with snap rings.

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tubes erosion shields inspection 01

Boiler tube erosion shields are produced using a high-pressure press and professional mould pressing. The production time is short, the welding performance is good, the welding should not fall off, the surface is smooth, and the appearance is beautiful. Boiler tube erosion shields with bends are formed by pressing on a press or bending with a special abrasive on a tube bender.

Boiler tube shields are designed to eliminate major maintenance and downtime costs from boiler and condenser tube failure.

Related products

Service Life

The service life of boiler tube erosion shields is different in different types of boilers and different use parts. The normal service life is a period of overhaul (3-5 years) for the boiler. Generally, some boilers will be replaced or retrofitted every time the boiler is overhauled. The main replacements are those of the boiler tube erosion shields that are severely thinned and exceeded the standard; those that were not firmly detached during the boiler operation during the previous installation. According to the wear of the boiler tube erosion shields during replacement, if the thickness is severely reduced, it needs to be replaced, the deformation is severe, and those that cannot protect the tube also need to be replaced. In addition, some boiler tubes are not equipped with boiler tube erosion shields, but during the boiler inspection, it is found that the tubes have a tendency to wear and thinning. Generally, boiler tube erosion shields are also installed to prevent further wear of the tubes and cause serious consequences such as boiler explosions.

On the heating surface of superheated and the economizer tube bundle of the boiler, in order to prevent the pipe from being worn by high temperature flue gas washing, boiler tube erosion shields are mostly arranged on the outer side of the pipe in the direction of flue gas flow. The elbow erosion shields solves the abrasion problems of water wall tubes, superheater tubes, economizer tubes and reheater tubes in the furnace, and provides a guarantee for the long-term and reliable operation of CFB boiler. With the increase of CFB boiler products, the type and quantity of the elbow erosion shields will increase.

boiler erosion shield sevice life

Main material of tube erosion shields

Material（Grade）Temperature resistanceYield strengthTensile strengthElongationHBHRBHV
1Cr18Ni9Ti925 ℃≥205MPa≥520MPa≥40%≤187≤90≤200
Cr23Ni131095 ℃≥205MPa≥520MPa≥40%≤187≤90≤200
1Cr20Ni14Si21095 ℃---≥590MPa≥40%---------
Cr25Ni201150 ℃≥205MPa≥520MPa≥40%≤187≤90≤200
1Cr25Ni20Si21150 ℃---≥540MPa≥35%---------
We can also supply boiler tube erosion shields of other materials.

Different types of stainless steel are selected according to the specific conditions of different working conditions. Common materials are: TP321 (Cr18Ni9Ti), TP309S (Cr23Ni13), 1Cr20Ni14Si2, TP310S (Cr25Ni20), 1Cr25Ni20Si2, and some low temperature areas (such as low temperature superheater, low temperature reheater) are made of 1Cr13, 1Cr6Si2Mo and other materials.

The boiler was originally designed to be accurate. Different materials have different temperature resistance and mechanical strength. 1Cr13, 1Cr6Si2Mo generally has a temperature resistance of 600 ℃ or less.

Custom tube shields

Custom tube shields are designed to minimize tube failure in highly abrasive or corrosive areas. Our many styles insure that you’ll be able to choose the most appropriate design for your application, providing an inexpensive way to prolong tube life.

Advanced Manufacturing Facilities Mean Fast Response

Tube shields from us are manufactured to exacting standards. Advanced equipment and material handling capabilities permit us to offer the fastest turnaround times anywhere.

Shapes And Specifications

The cross-sectional shape of Boiler Tubes Erosion 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 Tubes 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.

Outside Of Bend

Outside of bend
Inside of bend

Inside of bend

S-shape Outside of bend

S-shape Outside of bend
Straight tubes erosion shields

Straight tube erosion shields

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.

Application

Tubes Erosion Shields are mainly used on the windward side of the heating surface of the boiler, such as superheaters, reheaters, economizers, and water-cooled wall pipes.

The main role is to protect the heating surface of the boiler pipes, reduce pipeline wear, and increase the heating surface of the pipes.

Tube Erosion Shields
Application of tube erosion shields

Erosion shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

We offer shielding for tubing, covering straight, bent and finned sections, as well as the clips that hold these in place.

In the long term, these shields more than pay for themselves, preventing the costly replacement of tubing and avoiding the downtime that results from tube breakdown and leaks.

Snap rings

Snap rings are used in conjunction with Boiler Tubes Erosion Shields, which is a clip that easily installs Boiler Tubes Erosion Shields to the tube.

snap ring drawing

The snap ring and Boiler Tubes Erosion Shields are overlapped and welded, generally about 190-200 degrees Erosion Shields is a 180-degree semicircle), but also leave a welding position for easy welding and fixing. Generally, each piece of Boiler Tubes Erosion Shields needs to be equipped with 2-4 snap rings with a pitch of 200-500mm.

The anti-wear snap ring is also called clamp, buckle, tube clamp, etc.

The main role of the anti-wear tile snap ring: the role of fixing the anti-wear tile to avoid problems such as the anti-wear tile falling off during installation.

The types of common anti-wear tile rings can be divided into: U-shaped lap type snap ring, butt-type semicircular snap ring.

Install erosion shields with snap ring

The snap ring is a short section that is installed on the pipe in conjunction with the wear-resistant tile. Generally, it is welded to the wear-resistant tile by lap welding, that is, to cover the wear-resistant tile slightly, so it is larger than the wear-resistant tile. The opening arc is Around 190-200 degrees, the welding position needs to be set aside to facilitate welding and fixing. The width of the snap ring must not be less than 20mm.

The installation requirements of anti-friction tiles of different shapes are slightly different. Basically, each anti-friction tile is installed with not less than 2-4 snap rings. The snap ring and the anti-friction tile are welded together to prevent expansion due to heat. The tiles fall off, and the joints are required to be fully welded.

Install erosion shields with snap ring

Well packing and delivery

The packaging method of the tube shields usually includes a single bare package-container, wooden frame bundled packages, channel steel frame box.

Packing tube shield
Single bare package
Packing tube shields

wooden cases
If customers have special requirements for packaging, they can be packed in wooden boxes.

Frequently Asked Questions

FAQ

How long is your delivery time?

The delivery time of customized products is generally 25 35 days, and non customized products are generally shipped within 24 hours after payment.

What are your payment terms?

T/T 30% as the deposit,The balance payment is paid in full before shipment

What is your minimum order quantity?

There is no minimum order quantity requirement. Customized products are tailor made according to the drawings provided by the customer.

Do you provide samples? Is it free?

If the value of the sample is low, we will provide it for free, but the freight needs to be paid by the customer. But for some high value samples, we need to charge a fee.

What is the packaging and transportation form?

Non steaming wooden box and iron frame packaging. Special packaging is available according to customer needs. The transportation is mainly by sea.

Inspections

As part of our quality regimen, 100% of incoming raw materials, semi-finished products, as well as finished products are thoroughly inspected prior to being entered into our inventory. We have established multiple hold points throughout fabrication as well as a comprehensive final inspection for all products.

Need to inquire about our products? Fill out the form below and our staff will be in touch!
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Why Do I Need Wear Parts?

“Wear” is the last thing any business wants to experience with their machines. Apart from its unpleasant physicality, it could also be a sign that means your parts and/or components are about to break. You need wear parts to help prevent or prolong the wearing out of these parts and components – and that could be any type of wear parts such as pipes, liners, plates, etc.

What Kinds of Wear Plates Do You Offer?

Here at Sunny Steel, we put emphasis to the primary kinds and types of wear pipes and fittings – they include:
  • Ceramic Liner pipes and fittings
  • Ceramic tile lined pipes and fittings
  • Ceramic sleeve lined pipes and fittings
  • Cast basalt lined pipes and fittings
All of them have their particular uses, but these cover almost all the materials companies need to work on.

Merits and Salient Features

  • Extremely High Resistant to Abrasion, Erosion and Corrosion.
  • Resistant to most of the Chemicals, Alkalis and Acids.
  • Very Long life
  • Less Down time and Maintenance Cost.
application of rare earth alloy wear resistant pipe

Thermal power stations – raw coal chutes/ hoppers, feed bunker/coal bunker, ash pits, crushers, bottom ash, disposal slurry, dust lines/ bends, pipeline/bends, fly ash. Trenches below hopper and pipelines, pulverized coal piping.

Cement plants – dynamic air separators, raw mill ducts/ chutes, drag chain conveyor, grate cooler housing, air separator/ cyclones, coal handling, coal hopper/ chutes, cement conveying, slurry lines/ bends lines/ bends, discharge boxes / bankers, lime/silica hoppers/chutes, chain conveyor housing, mixers/nozzles, coal ventury.

Steel plants – coke sorting unit, coal bunkers / sinter bunkers, lime bunkers, coke breeze, sinter plant cyclones, sinter plant flow conveyors, iron slurry line, thick slurry lines, air lift pipes, telescopic pipes, granulated slag, hot mill flume.

Coal washeries – coal washing plants, coal transportation, conveyor chutes/pipes, floatation cells, media sumps, centrifuges, cyclones, sieves.