Bearing Pipes
Pipes designed for bearing loads, offering high strength and durability.
Waterwall tubes are essential components in water-tube boilers, forming the furnace walls and playing a crucial role in heat absorption and steam generation.
The membrane wall welding machines are entirely developed by Pourin. From design, manufacture, installation, commissioning and production, each step has been continuously improved. At present, the membrane wall cladding equipment leads the world in technological advancement, quality reliability and production efficiency.
| Parameter | Value/Options |
|---|---|
| Capacity | 7500 m2/month |
| Cladding Metal | Inco622, Inco625, Inco686, C22, C276, 72M, ER309L, PW-200, PW-300, PW-400, PW-500 etc |
| Base metal |
|
| Cladding THK | ≧ 0.05" /1.27mm |
Waterwall tubes are integral components of a boiler's waterwall, forming the furnace walls where heat from the combustion process is transferred to the water inside the tubes. These tubes absorb heat, converting water into steam, which is then used to generate power. Waterwall tubes are made from high-strength materials to withstand extreme temperatures and pressures. They are crucial for the boiler's efficiency, providing thermal insulation and protecting the furnace from heat damage. These tubes are commonly used in power plants and industrial boilers.
Waterwall tube needs to have certain strength under room temperature and high temperature, good resistance to fatigue, flue gas corrosion and abrasion. It should also have good processing property, especially weldability.
Typically, membrane waterwall is used in supercritical (SC) and ultra-supercritical (USC) boilers. Due to the size and structure of waterwall panel, post-weld heat treatment is impossible inside furnace. Therefore, the weldability of selected waterwall tube is crucial. Additionally, medium inside waterwall tube is steam & water mixture in two phase, and outer wall of tubes is exposed in area where coal particles have the highest velocity inside combustion furnace. Issues related to fouling-induced temperature rise on tube wall and particle erosion during combustion must be considered when selecting material for waterwall tube.
A water wall tube, also known as a water cooled wall tube, is a critical component in many industrial boilers and power plants. It is designed to absorb the heat generated by the combustion of fuel in the furnace and transfer it to the water circulating through the tubes. This process is essential for the generation of steam and ultimately the production of electricity or heat in various industrial processes.
Water wall tubes are typically made of high-quality steel or alloy materials that can withstand high temperatures and pressure. They are placed in the furnace area of a boiler or combustion chamber, where they are exposed to intense heat from the burning fuel.
Water or a mixture of water and steam flows through the interior of these tubes. As they are exposed to the high-temperature flue gases on the outside, the water inside the tubes absorbs heat, preventing the tubes from overheating.
The absorbed heat causes the water inside the tubes to turn into steam. This steam is then collected and used for various purposes, such as driving steam turbines in power plants or for industrial processes requiring steam.
Water wall tubes are typically arranged in a serpentine or staggered pattern to maximize heat transfer efficiency. This design ensures that a large surface area of the tubes is in contact with the hot gases, promoting effective heat exchange.
Maintaining the proper temperature of the water or steam within the tubes is crucial for safe and efficient operation. Various control systems are employed to regulate the flow rate of water, ensuring that the tubes are adequately cooled.
Water wall tubes play a significant role in the overall efficiency of a boiler or power plant. Efficient heat transfer from the combustion chamber to the circulating water helps maximize energy conversion and minimize fuel consumption.
Water wall tubes are a vital part of modern boiler and power plant technology, allowing for the efficient conversion of thermal energy into electricity or process heat while protecting the structural integrity of the equipment. Proper maintenance and monitoring of these tubes are essential to ensure the safe and reliable operation of industrial boilers and power generation facilities.
Water wall panels are used in modern industrial boilers to replace steam generating tubes. They are designed to absorb the high temperature radiant heat given off by the flame in the fuel chamber and to reduce heat loss due to air leakage.
20# Steel, SA192, SA 106B, 15CrMoVG, 12Cr1MoV Standards
ASME Code standard, GB Standard Quality inspection
MT, RT, Hydraulic test
Membrane boiler water wall panel: spot welds many rolled finned tubes into a sealed combined heating surface, which improves the air tightness of the furnace and reduces air leakage.
Studded water wall tube: welds studs 20 to 25 mm long and 6 to 12 mm in diameter to the water wall tube and then applies a chrome ore refractory plastic to reduce the heat absorption of the water wall panel and increase the temperature in the combustion zone. It is suitable for situations where it is difficult to light the fuel and for certain slag tapping furnaces.
Plain tube boiler water wall panel: composed of a whole series of seamless steel tubes, the simplest structure.
Wall-mounted boiler water wall tube: embedded in the inner wall of the furnace wall, one-sided heat absorption.
Double-sided heated water wall panel: installed in the centre of the large boiler furnace, which is divided into two independent parts, and heated on both sides.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
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