Butt Weld Pipe Fittings
Precision engineered butt weld fittings for seamless pipe connections.
Fin tube(Finned tube) is used in applications involving the transfer of heat from a hot fluid to a colder fluid through a tube wall.
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Fin tubes are a type of heat exchanger used in many industries. They are made of aluminum cladded carbon steel and have brazed aluminum fins. The fins increase the surface area of the tubes, which allows them to transfer heat more efficiently. This makes them ideal for applications where high heat transfer rates are required.
Finned tubes are used in applications that involve the transfer of heat from a hot fluid to a colder fluid through a tube wall. They are used in condensers, coolers, and furnaces. The larger surface area means that fewer tubes are needed compared to the use of plain tubes.
The type of finned tube is chosen depending on the specific requirements of each process equipment unit. The fin type and combination of materials are chosen based on the specific requirements of each process equipment unit.
Finned tubes are used in applications where high heat transfer rates are required, such as in power plants and refrigeration systems. The fins increase the surface area of the tube, allowing for more efficient heat transfer between two fluids. This makes them an ideal solution for heat transfer applications where space is limited.
Finned tubes are used in condensers, coolers, and furnaces. The larger surface area means that fewer tubes are needed compared to the use of plain tubes. This can decrease the overall equipment size and can in the long-run decrease the cost of the project.
Finned tube heat exchangers can be used in a broad range of industries including oil & gas, power generation, marine and HVAC&R. They generally use air to cool or heat fluids such as air, water, oil or gas, or they can be used to capture or recover waste heat.
The biggest problem with using a finned tube heat exchanger is with the cleaning and maintenance of the outer surface of the tubes. Because of the fins, mechanical cleaning becomes very difficult and you would have to go for chemical cleaning.
Fin tubes are a type of heat exchanger that are used in many industries. They have a finned surface, which increases their surface area and allows them to transfer heat more efficiently. Finned tubes are typically used in two-phase heat transfer applications, such as condensation or evaporation.
Finned pipes are generally used for single-phase heat transfer applications. Both finned pipes and finned tubes use fins to increase the surface area for heat transfer.
Finned tubes are used when the heat transfer coefficient on the outside of the tubes is appreciably lower than that on the inside. They can reduce the equipment cost and also equipment sizes.
There are several kinds of fin tubes, such as:
High fin tubes are better for applications where the temperature difference between two fluids is high. Low fin tubes are better for applications where the temperature difference is low.
High fin tubes are made of a metal tube surrounded by an aluminum or copper strip. The strip can be applied in different ways, including type L, type KL, type LL, type G (embedded), or type extruded. The higher the fin height, the more surface area and heat transfer capabilities.
Low fin tubes are made of a single material and have a smaller fin of about 1/16th of an inch. They are generally used in liquid to liquid or liquid to gas applications such as coolers, condensers, and chillers.
The profile of the fins has a significant effect on the performance of a finned tube heat exchanger. The larger the fins and the tighter the fin pitch, the more thermal conductivity is achieved.
Finned tubes are a series of tubes with fins on the outside. The fins increase the surface area for heat transfer, which increases the rate of heat exchange. Finned tubes are used in heat exchangers to transfer heat between hot and cold streams. The heat transfer rate depends on the temperature difference between the two fluids and the heat transfer coefficient between each of the fluids.
Finned tube heat exchangers are used in a variety of industries, including:
Finned tube heat exchangers can be used to:
Heat transfer in tube and fins is a process that involves a fluid passing through tubes and conducting heat to fins. The fins then dissipate the heat to air that is blown over them. The fins increase the surface area for heat transfer, which increases the rate of heat exchange.
The amount of heat an object transfers is determined by the amount of conduction, convection, or radiation. The thermal flux is a function of both the thermal conductivity of solid parts and the convection heat coefficient between the gas and the surrounding walls. The shape and dimensions of the tubes and fins also affect the convection heat coefficient.
In an air-cooling fin-and-tube heat exchanger, heat transfers from the air flowing outside tubes to the liquid flowing inside the tubes. Because air has low thermal conductivity and density, it has poor heat transfer capability.
Spiral wound finned tubes are designed to maximize heat transfer efficiency in various industrial applications.
The trapezoidal section formed by rolling L-shaped finned tube is consistent with the distribution of heat flow density, and the tubes are closely combined with high thermal efficiency, thus eliminating the contact thermal resistance caused by the gap between the fins. Working temperature: 230'℃ Characteristics: winding process, high production efficiency, uniform spacinggood heat transfer, high fin ratio, the base tube can be protected from air erosion.
LL type spiral wound fined tube: on the basis of L-ype, the root of the fin is completely covered on the outer surface of the base tube, which canstrengthen the contact surface and increase the heat transfer effect. Maximum working temperature: 170 ℃.
KL type fin tube, also known as knurled fin tube, is to roll the pattern on the base tubebefore winding the fin, or install a blade on the winding machine to knurl on the base tube.and the back blade is used for winding, knurling and winding at the same time.The maximum service temperature is<250℃, and the maximum service pressure is <3.2Mpa.
The extruded fin is formed from an outer thick-walled aluminium tube (muff) aligned over an inner base tube. The two tubes are pushed through three mandrels with rotating discs that literally squeeze or extrude the aluminium fins up and out of the muff material in a spiral shape in one operation.
The processing technology of cold rolled aluminium steel finned tube isthat aluminium tube and steel tube are first processed into bimetallic composite tube, and then the fin is formed after mechanical cold rollingBased on the physical characteristics of aluminium tube, the finned tube with steel tube as the core and aluminium fin formed by cold rolling are made into one. lt is widely used in steel, petroleum, chemical industry.machinery, shipbuilding, power station, hospital and food industry.
Single metal composite finned tube is rolled from aluminium tube as a whole. Pure aluminium rolling finned tube has no contact thermal resistance, high strength, heat resistance and mechanical vibration, good thermal expansion performance and considerable expansion heat exchange surface.
Copper finned tube is a type of heat exchanger element. In order to improve the heat exchange efficiency, fins are usually added on the surface of the heat exchange tube to increase the external surface area (or internal surface area) of the heat exchange tube, so as to achieve the purpose of improving the heat exchange efficiency. The integral rolling fin tube has no contact thermal resistance, good heat transfer performance, high strength, heat resistance and mechanical vibration resistance, and good thermal expansion performance.
Copper-aluminium composite finned tube is made of copper-aluminium composite tube after compounding and then rolled. It has the characteristics of close combination, small thermal resistance, good heat transfer performance, high strength, small flow loss, strong corrosion resistance, low deformation and long working life under long-term cold and heat conditions. When wet cooling is carried out in heating and air conditioning,condensation water on the surface of fin is easy to beremoved,and it is not easy to form dust and scale in coaxial heating and other heat exchange occasions.
The fins are manufactured by embedding the fin strip into a groove formed on the base tube.
The Fin is allowed to be placed in the groove and then the backfilling of the groove is carried out to ensure firm adherence of the fins to the base tubes.
Spiral wound finned tubes find extensive applications in various industries due to their excellent heat transfer capabilities and durability. Some of the key industries where they are commonly used include:
Corrugated heat exchange tubes are widely used in various industries for efficient heat transfer and thermal management.
Low Thread Finned Tube is a type of high efficiency heat exchanger tube that is rolled to form spiral fins on its outer surface.
The reinforcing effect of this type of tube is on the outside of the tube. On the one hand, the heat transfer area is enlarged by the spiral fin; on the other hand, when the shell side medium flows through the surface of the finned tube, the surface spiral fin has a seaming effect on the laminar flow side layer, which reduces the thickness of the boundary layer; in addition, the turbulence formed on the surface is stronger than that of the smooth tube, which further reduces the thickness of the boundary layer. The results show that the tube has a high heat transfer capacity. When the tube is used for evaporation, the number of bubbles on the unit surface can be increased, and the boiling heat transfer capacity can be improved.When the tube is used for condensation, the threaded fin is very conducive to the drop of condensate at the lower end of the tube, making the liquid film thinner, reducing the thermal resistance and improving the condensation heat transfer efficiency. It is suitable for the shell side medium is relatively clean, no corrosion, no scaling, can use low thread finned tube as heat exchanger element to form low thread finned tube high efficiency heat exchanger.
The threaded tube serves several important functions in various industries:
T-type finned tube is suitable for the shell-side medium is relatively clean, nosolid particles, no gum.T-type finned tube can be used as heat exchanger element to form T-type finned tube high-efficiency heat exchanger, so as toimprove the effect of shell-side boiling heat transfer.
The corrugated tube is a new type of high efficiency heat exchanger tube instead of the straight tube, which has the advantages of strong corrosion resistance, longer service life, no pitting corrosion and low price.
The stainless steel corrugated tube of the corrugated tube heat exchanger is made of high quality stainless steel material, which is corrosion resistant. What's more, the special inner and outer corrugations of the corrugated tube are more and more important, the turbulent medium constantly washes the inner and outer surface of the heat exchanger tube, and the dirt is difficult to accumulate on the surface. Even if the scale is formed, because the corrugated tube is a flexible element, after the effect of temperature difference in the working process, all parts of the corrugated tube will be affected, The curvature of the corrugated tube is constantly changing.
Although the deformation caused by this change in curvature is not very large, the linear expansion coefficients of the dirt and the metal bellows are quite different. Therefore, a large pull-out force is generated between the dirt and the corrugated tube surface, which is sufficient to cause the scale to fall off and to realise automatic cleaning and automatic descaling. In particular, this point is incomparable with the row of tubes and other heat exchangers, and the stress distribution is uniform. Good Corrosion Resistance.
As the corrugated tube adopts ultra-thin-walled stainless steel material, on the one hand, it improves the serviceability of the product, at the same time, it also greatly reduces the weight of the product and saves the material.In addition, due to the reduction of operation and maintenance cost and the reduction of floor space, the performance-price ratio of the product is greatly improved, and the economic benefit is obvious.
An expansion wave tube is a specialized tube used in various industries for specific purposes.
Here are some key points about expansion wave tubes:
The special wave crest and trough design of the expansion wave tube makes the fluid flow form strong turbulence by continuously changing the cross section inside and outside the tube. Even under the condition of very small flow rate, the fluid can form strong disturbance inside and outside the tube, which greatly improves the heat transfer coefficient of the heat exchanger tube, which is 2 ~ 3 times higher than that of the traditional tube heat exchanger.
In the working process of the expansion wave tube, on the one hand, the medium inside and outside the tube is always in a highly turbulent state, which makes it difficult for the solid particles in the medium to deposit and scale; on the other hand, affected by the temperature difference of the medium, the expansion wave tube will produce a small amount of axial expansion deformation, and the curvature inside and outside the tube will change frequently. Because of the large difference between the linear expansion coefficient of the scale layer and the expansion wave tube, the fouling and the heat exchanger tube are different. Even if there is scale deposition, it will break and fall off automatically, so the heat exchanger can always maintain long-term and efficient heat transfer performance. At the same time, the pipe channel is large, the pressure drop is small, the energy saving effect is obvious, and there is no clogging problem.
The special structural shape of the expansion wave tube can effectively reduce the thermal stress under the condition of heating without adding an expansion joint, thus simplifying the product structure and improving the reliability of the product.
The sealing perimeter of the product is short, and the existence of wave crest and wave trough enhances its axial expansion and contraction ability, effectively reduces the temperature difference stress, and can adapt to the change of large temperature difference and pressure, so as to avoid leakage caused by pipe orifice rupture. The unique joining technology of baffle plate and corrugated tube prolongs the service life of the heat exchanger. The heat transfer efficiency of the external expansion corrugated tube is better than that of the conventional internal pressure corrugated tube.
Our welded finned pipes are used in the power generation, petrochemical, oil refining industries and in industrial processing equipment and can be manufactured to meet ASME “U” and “S” stamp certifications.
Spiral high frequency welding finned tubes are specialized tubes used in various industries for heat transfer applications.
Our flexible production scheduling provides quick product turnaround, allowing you to minimize downtime during emergency repairs or scheduled downtime when ordering replacement parts, or to meet production schedules when ordering OEM parts.
Studded tubes have studs welded to the metal tube. These studs are arranged in a specific formation along the length of the tube. They are commonly used in boilers and refineries. As they increase the surface area for higher heat transfer, they are used for reheating.
The nail head tube is also called nail like ribbed tube. In petrochemical industry, nail head tube is widely used. Especially in the convection chamber of the tube furnace, in order to improve the heat transfer effect outside the tube, the heat transfer element often adopts the nail head tube.
Serrated spiral high frequency welding finned tubes are specialized heat transfer components designed for efficient heat exchange in various industrial applications.
Cold-wound finned tubes are heat exchanger tubes made by wrapping a metal strip around a base tube to create a helical finned structure.
The fins increase the tube's surface area, which improves heat transfer. Cold-wound finned tubes are used in many industrial applications.
According to the material, there are carbon steel (or stainless steel) winding aluminium sheet.carbon steel winding carbon steel sheet, stainless steel winding stainless steel sheet, thewinding segment spacing is about 4mm, and the common sizes of strip steel (aluminium sheet.carbon steel sheet, stainless steel sheet) are sheet height of 10mm, 12mm, 15mm, etc., sheet thickness of 0.35mm, etc., and sheet spacing of 4mm, 5mm, 6mm, etc. can also be customized according to customer requirements.
Elliptical Finned Tube is an elliptical seamless tube with a base tube that has aluminium fins or copper fins wrapped spirally and tightly around the outer surface of the base tube under tension.
The finned tube is connected to the pipe piece by piece. As the tube is often not round (especially welded steel tubes), there is inevitably a gap between the fin and the tube wall. lf there is a gap, there is a gap thermal resistance. For this reason, the following measures are often used: resistance welding method, dip coating method, contact welding method and tube expansion method.
The utility model provides a technology to make the tube and fin close together and improve heat dissipation. lt prefabricates the inclined edge hole on the string piece to reserve the interference material, and then retracts it to make the tube and fin form the extrusion of contour peak and contour valley. It can realize the seamless combination under the normal temperature condition without welding, sticking and filing other materials, so as to make it a high efficiency heat sink. In radiator, heat exchanger, shower water heater and so on, this technology can save tin and chemical adhesive.
Longitudinally finned tubes are made by resistance-welding fins along the length of the tube.
The fins first form a U-shaped channel so that each U-leg forms a fin. The channel is cut to length, aligned and resistance welded along the length of the tube. The channel is welded in pairs, opposite each other, so the number of fins specified must be a multiple of four.
The isolation ring is suitable for aluminum finned tube, extruded finned tube and L/ll / KL finned tube, and ismost commonly used in G-based finned tube.
Material: aluminum,galvanized steel, stainless steel
Size: O.D.:63.5mm, O.D.:73.5mm,etc
Used to fin type: L. LL. KL. G-type finned tube
Shape: round, hexagonal, octagonal.
Embedded aluminum finned tube circular spacer box.
The general flexible core tube of finned tube: the outerdiameteris 25.4mm，31.75mm and 38.1mmrespectively
Be installed on fin
Display at the joint
Steel radiator has the characteristics of compact structure, good air tightness and convenient installation. It is suitable for both steam system and hot water system. lt is widely used in air heating system of heating ventilation and drying equipment in large buildings.Structural Specification:The steel radiator is manufactured andproduced according to the standard atlas, which is composed of carbon steel frame and carbon steel cooling pipe (carbon steel heat pipe). The steel radiator is fixed by frame, with compact structure, good air tightness and convenient installation.Working medium:steam(<1.0MPa),hot water(<130℃).
Aluminium finned tube air heater is a new type of air heater improved on the basis of steel finned tube air heater. The heat exchange element of the product is made of steel tube .Aluminium "L" type finned tube, and the working temperature can reach 230℃. lthas the advantages of tight contact, no wrinkle, no dust accumulation, good vibration resistance, and can protect the tube from air erosion. Compared with the steel radiator, the heat dissipation area is increased by 10.20%, the weight is reduced by about 30%, and the heat can be increased by 10-20% under the same working conditions. lt is suitable for steam and hot water systems.lt can be widely used in air heating, material drying and air conditioning systems.
The heating medium of the radiator is steam or hot water, the working pressure of steam is 2.6 MPa, and the temperature of hot water is 70-130℃.
We offer you a broad portfolio of materials and can expand our offerings at any time to meet your specific needs regarding thermal conductivity, mechanical properties, or corrosion resistance.
For Aluminum L-Foot finned tubes, the fin material is aluminum, either 1100-0. The tube material is generally carbon steel, stainless steel, or brass; however the tube can be of any material.
For Welded Helical Solid and Welded Helical Serrated finned tubes, the fin and tube materials can be any combination that can be welded together using HIGH FREQUENCY WELDING process.
The materials chosen for a given application are a function of service temperature, corrosive environment, and/or erosive environment. Common tube materials used for our welded product lines include: carbon steel, carbon moly, chrome moly, stainless steel, Inconel, and Incoloy. Common fin materials include: carbon steel; stainless steels of types 304, 310, 316, 321, 409, and 410; Nickel 200, and Inconel.
We offer you a broad portfolio of materials and can expand our offering at any time to meet your specific needs regarding thermal conductivity, mechanical properties, or corrosion resistance.
| Material | Grade |
|---|---|
| Carbon Steel Tubes | A179, A192, SA210 Gr A1/C, A106 Gr B, A333 Gr3 Gr6 Gr8, A334 Gr3 Gr6 Gr8, 09CrCuSb, DIN 17175 St35.8 St45.8, EN 10216 P195 P235 P265, GB/T3087 Gr10 Gr20, GB/T5310 20G 20MnG, |
| Alloy Steel Tubes | A209 T1 T1a,A213 T2 T5 T9 T11 T12 T22 T91,A335 P2 P5 P9 P11 P12 P22 P91,EN 10216-2 13CrMo4-5 10CrMo9-10 15NiCuMoNb5-6-4 |
| Stainless Steel Tubes | TP304/304L, TP316/TP316L TP310/310S TP347/TP347H |
| Copper Tubes | UNS12200/UNS14200/UNS70600, CuNi70/30, CuNi 90/10 |
| Titanium Tubes | B338 Gr 2 |
Specific classification of finned tubes, there are lot of types of finned tubes, meanwhile also lot of new species comes up.
And so on.
The material certificate including all the tests can be provided, and also with EN10204 3.1standard.
Отопительные трубы с ребрами обеспечивают хорошую теплопередачу, благодаря абсолютно жесткой посадке плоского ребра на внутренней трубе. Наши отопительные трубы с ребрами применяются везде, где особые условия монтажа требуют использования необычных решений, например, в фасадных системах отопления, на многоярусных складах, в теплицах, при защите стеклянных куполов от запотевания и т.д., также трубы используются для отопления жилых, промышленных и складских помещений. Имеют документированную высокую степень теплоотдачи.
Ребристые трубы монтируются при помощи стандартных фитингов, либо под сварку по желанию Заказчика.
Мы изготавливаем два типоразмера ребристой трубы :
Ду32 и Ду40.
Длину трубы определяет Заказчик.
Покрытие трубы:
-грунт
-порошковая окраска
-горячий цинк.
По ценам и срокам изготовления вы можете узнать, позвонив по телефону
Ребристая труба для отопления на свинокомплексах и птицефабриках
It is fabricated with a batch of single fins that were processed by the punch press and then manually or mechanically, with a certain distance (wingspan) on the base tube.
This is the earliest fin tube fabrication with low cost and simple production process/ technology, easy to maintain. Divides into manual set and mechanical set. Manual set uses a tool that relies on the power of man to press the fins one by one. This method is limited by the pressure of the fin, so it is easy to get loose. The machine – set fin is carried on the wing piece machine. Due to the mechanical impact or liquid pressure, the pressure of the fin is high, so it can be used in a larger volume. The bonding strength between fin and tube is high and not easy to loosen. Mechanical transmission has high productivity, but the noise is large, the safety is poor, and the working conditions of the workers are not good. Although the hydraulic transmission does not have the above problem, but the equipment price is more expensive, the technical requirement to use maintenance personnel is higher, its productivity is also lower.
Currently HF Fin Tube is one of the most widely used helical fin tubes, you can see it as waste heat recovery in power, metallurgy, concrete, oil and gas, petrochemical, etc. When winding the steel strip around steel tube, the use of high frequency current skin effect and proximity effect on steel strip and steel pipe surface heating, until the plastic state or melt, the coil steel belt must be under pressure to complete welding. Comparing with embedded type and spot welding spiral crimped type, it is more advanced either on fin tube quality or production efficiency or automation degree.
The extruded fin is formed from an outer aluminum tube with a large wall thickness (muff), which is aligned over an inner base tube. The two tubes are pushed through three arbors with rotating discs that literally squeeze or extrude the aluminum fins up and out of the muff material in a spiral shape in one operation. Comparing with welding fin tube, dr extruded fin has higher production efficiency with low cost on material and high heat transfer. At present, it divides into copper or aluminum single metal fin tube and bi-metal composited fin tube.
Fin tube manufacturers produce a wide range of fin tubes. They are used in heat exchangers (air, water and chemically cooled) for various industries such as petroleum, petrochemical, steel, power generation and many more.
Corrosion protection processes are performed during fin tube manufacturing and the material used is corrosion resistant. Some fin tube types are:
Helical high finned tubes are used to repair air-cooled heat exchangers and are available in 5 variations
| Type | Photo | Descriptions | Properties |
|---|---|---|---|
| "KL" fin tubes |  |
After application the fin foot is knurled into the corresponding knurling on the base tube thereby enhancing the bond between the fin and tube resulting in improved heat transfer characteristics. Max. operating. temp. 260ºC | Max working temperature – 260 °C (500 °F) Atmospheric corrosion resistance – acceptable Mechanical resistance – acceptable Fin material – aluminum, copper |
| "G" fin tubes |
|
Fin strip is wound & embedded on a groove and securely locked by closing the groove with the base tube metal. This ensures maximum heat transfer at high temperatures. Max. operating temp. 450ºC |
Max working temperature – 400 °C (752 °F) Atmospheric corrosion resistance – poor Mechanical resistance – acceptable Fin material – aluminum, copper, carbon steel |
| "LL" fin tubes |
|
Manufactured in the same way as the ‘L’ fin type except that the fin foot is overlapped to completely enclose the base tube thereby giving excellent corrosion resistance. This type of tube is often used as an alternative to the more expensive extruded type fin in corrosive environments. Max. operating. temp. 180ºC | Max working temperature – 180 °C (356 °F) Atmospheric corrosion resistance – acceptable Mechanical resistance – poor Fin material – aluminum, copper |
| “L” fin tubes | 
|
The strip material is subjected to controlled deformation under tension giving the optimum contact pressure of the foot of the fin onto the base tube thus maximizing the heat transfer properties. The foot of the fin considerably enhances the corrosion protection of the base tube. Max. operating. temp. 150ºC | Max working temperature – 150 °C (302 °F) Atmospheric corrosion resistance – acceptable Mechanical resistance – poor Fin material – aluminum, copper |
| Extruded fin tubes | 
|
This fin type is formed from a bi-metallic tube consisting of an aluminium outer tube and an inner tube of almost any material. The fin is formed by rolling material from the outside of the exterior tube to give an integral fin with excellent heat transfer properties and longevity. Extruded fin offers excellent corrosion protection of the base tube. Max. operating. temp. 280ºC. | Max working temperature – 285 °C (545 °F) Atmospheric corrosion resistance – excellent Mechanical resistance – excellent Fin material – aluminum |
Fin foot is pre-formed into an LL shape (overlapped LL) and applied to base tube under tension. However, foot is pre-shaped to give overlap of one foot onto another, thereby improving base tube protection and thermal contact area Fin materials: Aluminum Base tube materials: Any metallic material. The smooth flat fins perpendicular to the tube surface give rise to very low resistance to air /gas flow and ensure that fouling is kept to a minimum. The foot of the fin is in contact with base tube and provides a complete sheathing over the finned length.
The Overlapped “L” fin design has interlocking fins that are wound together to prevent movement and separation. The fin protects the entire tubes, so the designation works well for the applications where corrosion is a factor.This type of finned tube is often used as an alternative to the more expensive extruded type fin in corrosive environments.
Fin tubes are a type of heat exchanger that is used in many different industries. These tubes have a finned surface, which increases their surface area and allows them to transfer heat more efficiently. This makes them ideal for applications where high heat transfer rates are required, such as in power plants and refrigeration systems.
Fin tubes are made from a variety of materials, including copper, aluminum, and stainless steel. They are available in a range of sizes and shapes and can be customized to meet the specific needs of each application.
One of the key benefits of fin tubes is their ability to operate efficiently at high temperatures and pressures. This makes them suitable for use in a wide range of applications, including air conditioning, heat exchangers, and radiators.
In addition to their high thermal performance, fin tubes are also durable and long-lasting. They are resistant to corrosion and can withstand the harsh environments often found in industrial settings. This makes them a cost-effective solution for many different industries.
The first actual inspection work on the fin tube heat exchanger is the raw materials inspection. Based on the ASME Code, providing material test reports for fin tube heat exchanger plates is mandatory. For other components, the marking inspection will be enough.
The Finned Tube is exposed to the outside to prevent rainwater from falling, try to keep it dry, and it should not be too close to the ground to prevent the irrigation in the greenhouse from corroding the finned tube. After the maintenance of the finned tube, the service life of the finned tube will be greatly increased.
We are a pretty proactive bunch. So, while we do charge a small fee per design to cover our costs, we absorb these costs when it is for a regular customer or where we are working jointly on a project. We also refund the fees in case it is followed by an order.
Absolutely, we can.
Applied Fin Tube is made with strip wrapped under tension around the base of the tube. Fins are welded to the base tube at the strip ends.
Pin Fin tubes are made from wire. Being cylindrical, wire has a larger area per unit of weight than the strip used in L type fin tubes. Also, due to the looped nature of the wire, less material is put on the tube than in the case of L fins. Consequently, the surface area of fins per meter of tubes is also less. However due to the superior turbulence created by the looped wire the actual heat transfer per meter of tube is significantly higher than in the case of L Type Fin Tubes. All of this together contributes to the weight differential between wire wound fin tubes and L Type Fin Tubes. In the case of similar metals, it is weighing half and in the case of Aluminium L fin vs. Steel wire fin they weigh about the same. The higher performance S5 pin fin tubes have an airside heat transfer performance per meter of tube that is 250% of the L type fin tubes.
Yes. A lot of our customer choose to supply their own pipes or tubes, however, a lot of customers ask us to supply them and we are happy to accommodate! We stock various sizes and if we don’t have what you need we can bring it in from one of our many suppliers. If you would like us to include the pipe or tube material in your order, please indicate that when you request a QUOTE.
A continuous helical fin is attached to the base tube by high frequency electric resistance welding in order to give an efficient and thermally reliable bond. Fins can be either solid or serrated (segmented). The weld produced in this process is a true forge, blacksmith weld. This type of weld is comprised of a fusion between two portions of parent metal without the introduction of a filler material. The weld is simply produced by heating the interfaces to be joined to a plastic state and applying pressure.
Used in boilers, furnaces and fired heaters for efficient heat recovery.
The main uses for high frequency welded finned tubes are in the heat recovery associated with boilers for power generation and in furnace applications for the petrochemical industry.
Our finning machines are equipped with online single or duplex cold bending equipment that can manipulate both ends of tubes in a single operation, thus ensuring exact alignment of the ends.
We do not. Our market lends itself to customer designed products, each special in itself. The number of combinations of diameter, overall length, materials and fin specs are too vast. Sunny Steel builds each finned product to each customers needs.
Finned tubes are the main components of heat exchangers. They are a series of tubes where fins have been added on the outside to increase the contact area with the outside fluid, to exchange heat and between the fluid inside the tube and the fluid outside the tube. Finned tubes are elongated aluminium cladded carbon steel flat tubes with brazed aluminium fins.
The rate at which such heat transfer can occur depends on three factors:
For any kind of information and request do not hesitate to contact our team, Sunny Steel is at your complete disposal.
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.
