Negotiable

Category: Chemicals/Quaternary Ammonium Salts/Alkyl Quaternary Ammonium Salts

Company: 宜兴市凯利达化学有限公司

Product Description: more>

$12000

Category: Others

Company: 北京德莱诚科技有限公司

Product Description: The main process parameters of ultrasonic welding include welding power, vibration frequency, vibration amplitude, static pressure F, and welding time, etc. (1) Welding PowerWelding capacity depends on the thickness of the weldment and the hardness of material H, which can be determined by the following formula.Where P is the welding power (W); k is the coefficient; H is the hardness of the material; δ is the thickness of the weldment. Generally, the required ultrasonic welding power increases with the thickness and hardness of the weldment. (2) Vibration FrequencyVibration frequency in ultrasonic technology has two meanings: the value of the resonant frequency and the accuracy of the resonant frequency. The selection of the harmonic resonant frequency is based on the thickness and physical properties of the weldment, typically controlled between 15 and 75 kHz. When welding thin parts, it is preferable to choose a higher resonance frequency because, while maintaining the same acoustic function, increasing the vibration frequency can correspondingly reduce the amplitude, thereby minimizing fatigue damage to thin parts caused by alternating stress. Typically, low-power ultrasonic welding machines (below 100W) select a resonant frequency of 25–75 kHz. When welding thick parts or materials with low hardness and yield strength, a lower vibration frequency should be used. High-power ultrasonic welding machines usually select a lower resonant frequency of 16–20 kHz. Due to severe load changes during ultrasonic welding, detuning may occur at any time, leading to reduced joint strength. Therefore, once the frequency of the welding machine is determined, the resonance of the acoustic system must be maintained, which is the basic guarantee of welding quality and stability. The relationship between the shear strength of the ultrasonic welding point and the vibration frequency. The higher the hardness and the greater the thickness of the material, the more significant the effect of vibration frequency. Amplitude determines the magnitude of the friction work and is related to the removal effect of the oxide film on the material surface, the state of plastic flow, and the heating temperature of the bonding surface. Since it is difficult to measure ultrasonic power in practical applications, amplitude is often used to determine power. n=4gThe relationship between ultrasonic power and amplitude is given by , where v is the relative velocity (mm/s); A is the amplitude (m); μ is the friction coefficient; ω is the angular frequency = 2πf; f is the vibration frequency (kHz); P is the ultrasonic power (W); F is the static pressure (N). The amplitude of ultrasonic welding depends on the thickness and material of the weldment, with a selection range of 5–25 μm. Lower amplitudes are suitable for welding parts with lower hardness or thinner sections, so low-power ultrasonic spot welders have higher frequencies and lower amplitude ranges. As material hardness and thickness increase, the selected amplitude value also increases accordingly. When selecting the material and structure of the transducer, the amplitude is also related to the amplification factor of the concentrator. The amplitude can be adjusted by regulating the output power of the ultrasonic generator. (4) Static PressureStatic pressure is used to directly transmit ultrasonic vibration energy to the weldment. Its selection depends on the material's thickness, hardness, joint form, and ultrasonic power. Generally, static pressure can be selected by drawing a critical curve. The critical curve of static pressure and power.When the static pressure is too low, because ultrasound is hardly transmitted to the weldment, it is insufficient to generate a certain amount of friction work between the weldments, and a connection may not form. When the static pressure is too high, the vibration energy cannot be used reasonably. Excessive static pressure increases friction excessively, weakening the relative friction motion between the weldments and even reducing the amplitude, which increases and decreases joint strength. For specific products, static pressure can be determined through the relationship between ultrasonic welding power and the critical curve of static pressure and power. (5) Welding TimeWelding time is the duration during which ultrasonic energy is input into the weldment. The formation of a weld point has a minimum welding time; less than this time is insufficient to damage the oxide film on the metal surface, and welding cannot occur. Generally, as welding time increases, joint strength increases and then gradually stabilizes. However, when welding time is too long, the welding area is heated, the plastic zone expands, the strength of the welding area decreases, and the surface and internal structure of the welding area become coarse, reducing joint strength. The selection of welding time depends on the material's properties and thickness. Welding with high power and short time is generally more effective than with low power and longer time. When static pressure and amplitude increase and material thickness decreases, the ultrasonic welding time may take lower values. For wires or foils, welding time is 0.01 to 0.1 s, while for thick metal plates, welding time usually does not exceed 1.5 s.In addition to the above main process parameters, there are other process factors that affect the welding process, such as the precision of the welding machine and the welding atmosphere. Under normal conditions, ultrasonic welding does not require gas protection for the weldment. Only in special applications, such as titanium welding, lithium and steel welding, etc., is argon protection used. In some packaging applications, welding may need to be performed in a dry box or sterile room. more>

Negotiable

Category: Others

Company: 苏州岽创营造工程有限公司

Product Description: International Big Brand Supplier Alliance: more>

Negotiable

Category: Others

Company: 威格尔仪表(江苏)有限公司

Product Description: Principle and Characteristics of Jet Fans Jet Fan is a special type of axial fan based on fluid dynamics principles. Its core working principles are: High-speed jet formation: When air passes through the nozzle, the cross-sectional area suddenly narrows, causing a sharp increase in velocity and a decrease in pressure. Negative pressure suction effect: The high-speed jet creates a low-pressure zone around it, drawing in low-energy media (such as air) from the surroundings into the suction inlet, where it mixes with the jet and is discharged. Thrust generation: The force (thrust) exerted by the fan on the air is "equal in magnitude and opposite in direction" to the force received by the support, enabling efficient ventilation or smoke extraction. Performance Characteristics of Jet Fans High Efficiency and Energy Savings Utilizing advanced design, it fully leverages the kinetic energy of gases, generating high air pressure even at low speeds, reducing energy consumption by 20%-30% compared to traditional fans. Suitable for scenarios requiring high flow rates and low pressure, such as tunnel ventilation, helping to save operational costs. Compact Structure and Flexible Installation Small size and lightweight, it can be suspended from the top or sides of tunnels, occupying no floor space and requiring no additional duct construction. Supports bidirectional ventilation, allowing adjustment of operation direction to meet different ventilation needs (e.g., smoke extraction during fires). Low Noise and Stable Operation Optimized design of fan blades and air inlets ensures noise levels below 65 decibels, meeting indoor environmental requirements. Smooth operation, easy maintenance, and a lifespan of over 10 years. Strong Adaptability Reversible design: In emergencies such as tunnel fires, it can operate in reverse to extract smoke, ensuring personnel safety. Resistance to external interference: By adjusting nozzle angles or adding auxiliary equipment, it can handle complex airflow environments.For more details: http://www.danduokj.com/ more>

Negotiable

Category: Electrical Equipment & Supplies/Electric Motors/Generators

Company: 陕西德力能源科技有限公司

Product Description:       The daily maintenance of Shaanxi steam generators includes the following aspects:1. After each use, it is necessary to open the drain valve at the bottom of the Shaanxi steam generator to discharge impurities in the water and scale generated during the evaporation process, which can significantly extend the equipment's service life;2. Regularly check whether the air supply hose is intact (e.g., for aging, cracks, etc.). Frequently use soapy water at the hose connections to check for bubbles to determine if there is any air leakage, and replace the rubber hose periodically; 3. Pay attention to regularly inspecting whether the pressure gauge and safety valve are functioning properly. Additionally, the pressure gauge should be calibrated once a year;4. For steam generators using gas, fuel oil, biomass pellets, etc., observe during use whether the combustion flame is normal;5. Pay attention to daily cleaning: first clean the machine's exterior with a damp cloth, then wipe it dry with a dry cloth. Stubborn stains can be removed with a neutral detergent;6. For plastic parts, printed surfaces, and coated surfaces, avoid using detergents such as paint thinner or gasoline;7. Regularly inspect and clean the water supply pipes and steam pipes to prevent blockages or ruptures that could affect normal operation;8. Supplying water to the Shaanxi steam generator as required is also a form of maintenance. Using soft water or purified water can effectively prevent or reduce scale formation, extending the service life of the inner tank and heating elements.      In summary, these are the daily maintenance guidelines for Shaanxi steam generators. Strict adherence during use ensures the long-term normal operation of the Shaanxi steam generator. more>

Negotiable

Category: Chemicals/Chemical Machinery/Atmospheric Boilers

Company: 陕西德力能源科技有限公司

Product Description: Vanderli® Atmospheric Direct-Fired Gas Modular Boiler, Model CWZS0.7, dimensions: 2210mm long, 1422mm wide, 1985mm high. The direct-fired gas modular combined hot water boiler offers advantages such as high efficiency, durability, reliability, easy installation, flexibility, low operating costs, convenient maintenance and operation, excellent environmental performance, pollution-free operation, and noiselessness. It is widely suitable for heating and hot water supply in residential communities, commercial buildings, and households. Below is a comparison of Vanderli® gas modular boilers with other traditional boilers, highlighting the features of modular boilers: Gas modular boilers feature a modular design, simple structure, and flexible, convenient installation. The modular concept of gas boilers essentially breaks down a single large boiler into several smaller units. This allows gas modular boilers to achieve any required steam tonnage through simple parallel combinations, making them capable of replacing various common heating and hot water boilers. The modular design of these boilers results in the following characteristics: ① Each boiler serves as a backup for the others, significantly improving equipment and investment utilization as well as operational safety. In the event of an unexpected failure in one module, the impact on heating is minimal—only 1/N (where N is the number of boilers). No backup boiler is required. ② Excellent capacity expansion capability. As heating and domestic hot water loads in communities change (increase or decrease), the number of boilers can be easily adjusted to meet heating needs with minimal additional investment, unlike single large boilers, which are difficult to adjust in capacity. ③ Low requirements for boiler room infrastructure, substantially reducing construction costs. Small modular boilers can enter the boiler room through standard doors, and their layout can be customized based on the boiler room's specific conditions. For example, if the boiler room is long and narrow, the modules can be arranged accordingly. These boilers do not require special boiler room conditions, eliminating the need for deep foundations or expensive brick-concrete structures with high earthquake resistance. These features make condensing modular boilers particularly suitable for renovation and expansion projects. ④ The boilers operate on standard municipal low-pressure natural gas at 1.25–3.3 kPa, eliminating the need for independent pressure regulating stations, reducing pipeline costs, and saving on engineering expenses. ⑤ Gas boilers can be equipped with a unique "back-to-back" design, where one or multiple back-to-back modules form a heating system. Each system can be installed in parallel, with a compact size that requires no hoisting holes, saving space in the boiler room. more>

Negotiable

Category: Electrical Equipment & Supplies/Power Distribution & Transmission/Other Power Distribution Equipment

Company: 陕西德力能源科技有限公司

Product Description: Steam Generator Circulation MethodThe steam generator circulation method refers to the flow pattern of water within the boiler evaporation system, which can be categorized into natural circulation, assisted circulation, once-through, and combined circulation.The dust (including fly ash and soot), sulfur, and nitrogen oxides contained in flue gas are substances that pollute the atmosphere. Without purification, their emission levels can exceed environmental protection standards by several to dozens of times. Measures to control the emissions of these substances include pre-combustion treatment, improved combustion technology, dust removal, desulfurization, and denitrification. The use of tall chimneys can only reduce the concentration of pollutants in the atmosphere near the chimney.The forces used in flue gas dust removal include gravity, centrifugal force, inertial force, adhesion, as well as sound waves and electrostatic forces. Coarse particles are generally separated using gravity settling and inertial forces, while centrifugal separation is commonly employed for dust removal at higher capacities. Electrostatic precipitators and bag filters offer high dust removal efficiency. In wet water-film dust collectors, water droplets and films can adhere to fly ash, achieving high dust removal efficiency and also absorbing gaseous pollutants.Flue gas desulfurization methods include absorption and catalytic oxidation. Dry absorption uses alkaline alumina, semi-coke, activated carbon, etc.; wet absorption uses ammonia, sodium carbonate, lime slurry, etc. Using catalysts such as vanadium pentoxide at certain temperatures can oxidize most sulfur dioxide into sulfur trioxide, thereby facilitating absorption desulfurization. Due to the high cost of flue gas desulfurization equipment and operation, most enterprises prefer using low-sulfur fuels to reduce sulfur oxide emissions.The main nitrogen oxide in flue gas is nitric oxide. Flue gas denitrification methods include catalytic decomposition, selective catalytic reduction, and the use of high-temperature activated carbon for absorption denitrification. more>

$288

Category: Others

Company: 江苏广前建设集团有限公司

Product Description: Chimney Lightning Rod Installation（Chimney Lightning Rod Installation Company,Chimney Lightning Rod Installation Construction）Business Scope:1. Undertake the construction, installation, reinforcement, demolition, and heightening of various chimneys and water towers (brick, concrete, steel structure); concrete shell slip-form reinforcement; tilt correction; inner lining replacement; cleaning and dust removal; aviation marking color ring painting; replacement and reinforcement of exposed metal components such as ladders, platforms, guard nets, lightning rods, and anti-corrosion painting maintenance.2. Cleaning, repair, anti-corrosion, waterproofing, and damp-proofing leak stoppage for the inner and outer walls of chimneys, cooling towers, water towers, urea granulation towers, detoxification towers, and silos.3. Metal surface treatment and specialized anti-corrosion for TV towers, transmission towers, microwave towers, substation structures, bridges, various gantry cranes, steel beam roof trusses, gas tanks, (oil, acid, alkali, solvent) storage tanks, and chemical equipment.4. Exterior wall cleaning, repair, decoration, coating, and high-temperature resistant fireproof coating for high-rise buildings, mansions, factories, and coal conveyor trestles.5. Flooring EngineeringUndertake various terrazzo floors, epoxy, wear-resistant, hardened, dust-free, colored, anti-static, and metal (emery) cement-based wear-resistant floors; non-slip vibration-free driveways and colored embossed process floors; repair, cleaning, and waxing maintenance for various industrial floors.6. Underwater SalvageEngage in the construction of river, sea, and port terminals; dockyards, shipways, ship locks, navigation lift equipment, channel dredging, land reclamation, port area storage yards, embankment revetment, underwater rock blasting, and reef clearing projects, as well as corresponding silos, underwater foundations and bases, earthwork, navigation markers, trestle bridges, and coastal and offshore hydraulic engineering; installation of port loading and unloading equipment, installation of navigation building equipment, underwater excavation, heavy lifting, and inland river salvage and obstacle clearance projects.7. Desulfurization Anti-CorrosionCoal used in thermal power plants contains sulfur, which produces sulfur dioxide during combustion, severely impacting the atmospheric environment after emission. Due to environmental pressures, flue gas desulfurization (FGD) has become the primary method for controlling sulfur dioxide emissions in thermal power plants. Therefore, FGD flue gas desulfurization units have become essential supporting projects in many power plants. Those previously built without such units are now being retrofitted with flue gas desulfurization systems. Wet desulfurization anti-corrosion for the inner lining of thermal power plant chimneys, absorption towers, and flue ducts; anti-corrosion using acid-resistant borosilicate foam glass brick lining, vitrified ceramic tiles, glass flake anti-corrosion, spray polyurea, OM coatings, and acid-resistant mastic; repair of cracks and leaks in chimneys and flue ducts. more>

$888

Category: Others

Company: 江苏广前建设集团有限公司

Product Description: New Steel Chimney Construction (New Steel Chimney Construction Company, New Steel Chimney Construction )Business Scope:1. Undertake the construction, installation, reinforcement, demolition, and heightening of various chimneys and water towers (brick, concrete, steel structure); concrete shell slipform reinforcement; tilt correction; inner lining replacement; cleaning and dust removal; aviation marking color ring painting; replacement and reinforcement of exposed metal components such as ladders, platforms, protective nets, lightning rods, and anti-corrosion painting maintenance.2. Cleaning, repair, anti-corrosion, waterproofing, and moisture-proof leak sealing for the inner and outer walls of chimneys, cooling towers, water towers, urea granulation towers, detoxification towers, and silos.3. Metal surface treatment and specialized anti-corrosion for TV towers, transmission towers, microwave towers, substation structures, bridges, various gantry cranes, steel beam roof trusses, gas tanks, (oil, acid, alkali, solvent) storage tanks, and chemical equipment.4. Exterior wall cleaning, washing, repair, decoration, coating, and high-temperature-resistant fireproof coating for high-rise buildings, mansions, factories, and coal conveyor trestles.5. Flooring EngineeringUndertake various terrazzo floors, epoxy, wear-resistant, hardened, dust-free, colored, anti-static, and metal (emery) cement-based wear-resistant floors; non-slip vibration-free driveways and colored embossed process floors; repair, cleaning, and waxing maintenance for various industrial floors.6. Underwater SalvageEngage in the construction of river, sea, and port terminals; dry docks, shipways, ship locks, navigation lift equipment, channel dredging, land reclamation, port area storage yards, embankment revetments, underwater rock blasting, and reef clearance projects; as well as corresponding silos, underwater foundations and bases, earthwork, navigation markers, trestles, coastal and offshore hydraulic engineering; installation of port loading and unloading equipment, navigation structure equipment installation, underwater excavation, heavy lifting, inland river salvage, and obstacle clearance projects.7. Desulfurization and Anti-CorrosionCoal used in thermal power plants contains sulfur, which produces sulfur dioxide during combustion, severely impacting the atmospheric environment after emission. Due to environmental pressures, flue gas desulfurization (FGD) has become the primary method for controlling sulfur dioxide emissions in thermal power plants. Therefore, FGD flue gas desulfurization units have become essential supporting projects in many power plants. Those previously built without such units are now installing flue gas desulfurization systems. Wet desulfurization anti-corrosion for the inner linings of thermal power plant chimneys, absorption towers, and flues; anti-corrosion using acid-resistant borosilicate foam glass brick linings, vitrified ceramic tiles, glass flake anti-corrosion, spray polyurea, OM coatings, and acid-resistant mastic; repair of cracks and leaks in chimneys and flues. more>

$4000

Category: Metallurgy & Minerals/Common Steel/Angle Steel

Company: 安阳奥丰商贸有限公司

Product Description: Q235C angle steel is a common construction and engineering material with multiple advantages. It has a simple structure, is easy to process and connect, and can be widely used in building structures, bridges, vehicle manufacturing, and other fields. The cross-sectional characteristics of angle steel give it excellent load-bearing capacity and stability. Additionally, the standardized production of angle steel ensures material consistency and reliability.Carbon Structural Angle Steel        Q235C50*50*4         62.387130Carbon Structural Angle Steel        Q235C70*70*6         62.19257Carbon Structural Angle Steel        Q235C70*70*6         62.96177Carbon Structural Angle Steel        Q235C50*50*4         64.663254Carbon Structural Angle Steel        Q235C70*70*5         64.244131Carbon Structural Angle Steel        Q235C50*50*4         63.819208 more>

$888

Category: Others

Company: 江苏广前建设集团有限公司

Product Description: New Construction of Concrete Chimneys (New Construction of Cement Chimneys, New Construction of Concrete Chimneys)Business Scope:1. Undertake the construction, installation, reinforcement, demolition, and heightening of various chimneys and water towers (brick, concrete, steel structure); reinforcement of concrete shell slipforms; tilt correction; replacement of inner linings; cleaning and dust removal; painting of aviation warning color rings; replacement and reinforcement of exposed metal components such as ladders, platforms, protective nets, lightning rods, and anti-corrosion painting maintenance.2. Cleaning, repair, anti-corrosion, waterproofing, and moisture-proof leak sealing for the inner and outer walls of chimneys, cooling towers, water towers, urea granulation towers, and silos.3. Surface treatment and specialized anti-corrosion for metal structures such as transmission towers, microwave towers, substation frameworks, bridges, various gantry cranes, steel beam roof trusses, gas tanks, storage tanks (for oil, acid, alkali, solvents), and chemical equipment.4. Exterior wall cleaning, washing, repair, decoration, coating, and high-temperature-resistant fireproof coating for high-rise buildings, skyscrapers, factories, and coal conveyor trestles.5. Flooring EngineeringUndertake various terrazzo floors, epoxy, wear-resistant, hardened, dust-free, colored, anti-static, and metal (emery) cement-based wear-resistant floors; non-slip vibration-free driveways and colored stamped concrete floors; repair, cleaning, and waxing maintenance for various industrial floors.6. Underwater SalvageEngage in the construction of river, sea, and port terminals; dry docks, shipways, slipways, ship locks, navigation lift systems, channel dredging, land reclamation, port yard storage, embankment revetment, underwater blasting and clearing of reefs, and corresponding projects such as silos, underwater foundations and bases, earthwork, navigation markers, trestles, coastal and offshore hydraulic engineering, installation of port handling equipment, installation of navigation structure equipment, underwater excavation, heavy lifting, and inland river salvage and obstacle clearance.7. Desulfurization and Anti-CorrosionCoal used in thermal power plants contains sulfur, which produces SO2 during combustion, affecting air quality after emission. Due to environmental pressures, flue gas desulfurization (FGD) has become the primary method for controlling SO2 emissions in thermal power plants. Therefore, FGD systems have become essential supporting projects in many power plants. Those previously built without such systems are now being retrofitted with FGD installations. Wet desulfurization anti-corrosion for the inner linings of chimneys, absorption towers, and flue ducts in thermal power plants, using acid-resistant borosilicate foam glass brick linings, vitrified ceramic tiles, glass flake anti-corrosion, spray polyurea, OM coatings, and acid-resistant mortar for anti-corrosion; repair of cracks and leaks in chimneys and flue ducts. more>

$888

Category: Others

Company: 江苏广前建设集团有限公司

Product Description: Fang Chimney New Construction (Fang Chimney New Construction Company,Fang Chimney New Construction)Business Scope:1. Undertake the construction, installation, reinforcement, demolition, and heightening of various chimneys and water towers (brick, concrete, steel structure); concrete shell slip-form reinforcement; tilt correction; inner lining replacement; cleaning and dust removal; aviation marking color ring painting; replacement and reinforcement of exposed metal components such as ladders, platforms, protective nets, lightning rods, and anti-corrosion painting maintenance.2. Cleaning, repair, anti-corrosion, waterproofing, and moisture-proof leak sealing for the inner and outer walls of chimneys, cooling towers, water towers, urea granulation towers, detoxification towers, and silos.3. Metal surface treatment and specialized anti-corrosion for TV towers, transmission towers, microwave towers, substation structures, bridges, various gantry cranes, steel beam roof trusses, gas tanks, (oil, acid, alkali, solvent) storage tanks, and chemical equipment.4. Exterior wall cleaning, repair, decoration, coating, and high-temperature resistant fireproof coating for high-rise buildings, mansions, factories, and coal conveyor trestles.5. Flooring EngineeringUndertake various terrazzo floors, epoxy, wear-resistant, hardened, dust-free, colored, anti-static, and metal (emery) cement-based wear-resistant floors; non-slip vibration-free driveways and colored embossed process floors; repair, cleaning, and waxing maintenance for various industrial floors.6. Underwater SalvageEngage in the construction of river, sea, and port terminals; dockyards, shipways, slipways, ship locks, aircraft lift systems, channel dredging, land reclamation, port area storage yards, embankment revetments, underwater rock blasting, reef clearing projects, and corresponding silos, underwater foundations and bases, earthwork, navigation markers, trestles, coastal and offshore hydraulic engineering, port loading and unloading equipment installation, navigation structure equipment installation, underwater excavation, heavy lifting, inland river salvage and obstacle clearance projects.7. Desulfurization Anti-CorrosionCoal used in thermal power plants contains sulfur, which produces sulfur dioxide during combustion, severely impacting the atmospheric environment after emission. Due to environmental pressures, flue gas desulfurization (FGD) has become the primary method for controlling sulfur dioxide emissions in thermal power plants. Therefore, FGD flue gas desulfurization units have become essential supporting projects in many power plants. Those previously built without such units are now being retrofitted with FGD systems. Wet desulfurization anti-corrosion for the inner linings of chimneys, absorption towers, and flue ducts in thermal power plants, using acid-resistant borosilicate foam glass brick lining, vitrified ceramic tiles, glass flake anti-corrosion, spray polyurea, OM coatings, and acid-resistant mastic for anti-corrosion; repair of cracks and leaks in chimneys and flue ducts. more>

$888

Category: Construction & Building Materials/Thermal Insulation Materials/Silica Brick Refractory

Company: 江苏广前建设集团有限公司

Product Description: New Brick Chimney Construction (Brick Chimney Construction Company,Brick Chimney Construction Services)Business Scope:1. Undertake the construction, installation, reinforcement, demolition, and heightening of various chimneys and water towers (brick, concrete, steel structure); concrete shell slip-form reinforcement; tilt correction; inner lining replacement; cleaning and dust removal; aviation marking color ring painting; replacement and reinforcement of exposed metal components such as ladders, platforms, protective nets, lightning rods, and anti-corrosion painting maintenance.2. Cleaning, repair, anti-corrosion, waterproofing, and damp-proofing leak stoppage for the inner and outer walls of chimneys, cooling towers, water towers, urea granulation towers, detoxification towers, and silos.3. Surface treatment and specialized anti-corrosion for metal structures such as TV towers, transmission towers, microwave towers, substation frameworks, bridges, various gantry cranes, steel beam roof trusses, gas tanks, storage tanks (for oil, acid, alkali, solvents), and chemical equipment.4. Exterior wall cleaning, repair, decoration, painting, and high-temperature resistant fireproof coating for high-rise buildings, factories, and coal conveyor trestles.5. Flooring EngineeringUndertake various terrazzo floors, epoxy, wear-resistant, hardened, dust-free, colored, anti-static, and metal (emery) cement-based wear-resistant floors; non-slip vibration-free driveways and colored stamped concrete floors; repair, cleaning, and waxing maintenance for various industrial floors.6. Underwater SalvageEngage in the construction of river, sea, and port terminals; dry docks, shipways, ship locks, ship lifts, channel dredging, land reclamation, port area storage yards, embankment revetments, underwater rock blasting, and reef clearance projects; as well as corresponding silos, underwater foundations, earthwork, navigation markers, trestles, coastal and offshore hydraulic engineering; installation of port handling equipment, navigation structure equipment, underwater excavation, heavy lifting, and inland river salvage and obstacle clearance.7. Desulfurization and Anti-CorrosionCoal used in thermal power plants contains sulfur, which produces sulfur dioxide (SO₂) during combustion, severely impacting the atmospheric environment after emission. Due to environmental pressures, flue gas desulfurization (FGD) has become the primary method for controlling SO₂ emissions in thermal power plants. Therefore, FGD systems have become essential supporting projects in many power plants, including retrofitting existing plants without such systems. Wet desulfurization anti-corrosion for chimneys, absorption towers, and flue gas duct linings in thermal power plants; anti-corrosion using acid-resistant borosilicate foam glass brick lining, vitrified ceramic tiles, glass flake anti-corrosion, spray polyurea, OM coatings, and acid-resistant mastic; repair of cracks and leaks in chimneys and flue gas ducts. more>

$5000

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company: 安阳奥丰商贸有限公司

Product Description: 09MnNiDR steel plate is a type of steel plate used for low-temperature pressure vessels, offering excellent low-temperature toughness and strength, suitable for low-temperature environments down to -70°C. Its chemical composition mainly includes carbon (C), silicon (Si), manganese (Mn), nickel (Ni), vanadium (V), niobium (Nb), aluminum (Al), phosphorus (P), and sulfur (S), with carbon content not exceeding 0.12%, manganese content between 1.20% and 1.60%, and nickel content between 0.3% and 0.8%. This steel plate can be delivered in normalized or normalized + tempered quenched + tempered conditions to ensure its good performance at low temperatures.The production locations of 09MnNiDR steel plate include Wuyang Steel, Xiangtan Steel, Xin Steel, Wuhan Steel, Chongqing Steel, Nanjing Steel, Jinan Steel, among others. Its physical quality is very high both domestically and internationally, even surpassing that of some foreign steel plates of the same grade. This steel plate has been included in China's GB150-1998 "Steel Pressure Vessels" standard, while the maximum thickness of 0.5Ni low-temperature steel plate in EN10028-4 is 50mm, and the U.S. -70°C grade low-temperature steel plate is 2.3Ni steel, but their low-temperature impact energy indicators are far lower than those of China's 09MnNiDR steel plate.The microstructure of 09MnNiDR steel plate is ferrite + a small amount of pearlite. Due to its low carbon equivalent (≤0.44), it has a low hardening tendency, is not prone to forming cold cracks, and the weld has good plasticity and toughness. During welding, preheating is usually not required, but if the plate thickness is large or the joint rigidity is high, preheating should be considered. However, the preheating temperature should not be too high to avoid affecting the grain size of the heat-affected zone.09MnNiDR steel plate has a wide range of applications, mainly used in the manufacture of low-temperature storage tanks, pressure vessels, heat exchangers, towers, reactors, and other equipment, especially in low-temperature storage and transportation equipment in industries such as petroleum, chemical, and natural gas. Additionally, it can be used to manufacture key equipment such as nuclear reactor pressure vessels, boiler drums, steam turbines, and coolers.09MnNiDR16mm            25001170009MnNiDR16mm            25001150009MnNiDR16mm            25001160009MnNiDR16mm            25001170009MnNiDR16mm            25001220009MnNiDR16mm            25001160009MnNiDR16mm            25001170009MnNiDR16mm            250011500 more>

$4400

Category: Others

Company: 安阳奥丰商贸有限公司

Product Description: Q345GJDZ15 is a low-alloy high-strength structural steel with good comprehensive properties and low-temperature impact performance. In low-temperature environments, the Z-direction performance of Q345GJDZ15 steel is particularly important, as it determines the material's toughness and crack resistance in the thickness direction.The Z-direction performance characteristics of Q345GJDZ15 steel are mainly reflected in the following aspects:Resistance to lamellar tearing: In the thickness direction, Q345GJDZ15 steel has good resistance to lamellar tearing. Lamellar tearing is a common defect in thick plates during welding, primarily caused by differences in plasticity in the thickness direction of the material. By controlling its chemical composition and heat treatment process, Q345GJDZ15 steel achieves relatively high plasticity in the thickness direction, effectively resisting lamellar tearing.Low-temperature impact performance: Q345GJDZ15 steel has excellent low-temperature impact performance, maintaining high toughness and impact resistance in low-temperature environments. This is crucial for structural components used in northern regions or low-temperature conditions. At -40°C, Q345GJDZ15 steel still retains good impact toughness, ensuring its safety in low-temperature applications.Weldability: Q345GJDZ15 steel has good weldability and can be welded using various methods, such as shielded metal arc welding and gas-shielded welding. During welding, appropriate welding materials and processes must be selected to ensure the quality and performance of the welded joints. Additionally, the Z-direction performance of Q345GJDZ15 steel ensures crack resistance in the thickness direction of the welded joints.Mechanical properties: Q345GJDZ15 steel has high tensile strength, yield strength, and elongation, providing excellent comprehensive performance. In the thickness direction, the Z-direction performance of Q345GJDZ15 steel ensures good uniformity and stability of the material, allowing structural components to distribute stress evenly during loading and improving structural safety.In summary, Q345GJDZ15 steel has significant advantages in Z-direction performance under low-temperature conditions, ensuring toughness and crack resistance in the thickness direction. This makes Q345GJDZ15 steel suitable for manufacturing structural components in various low-temperature environments. In practical applications, appropriate thickness specifications and welding processes should be selected based on specific usage environments and requirements to ensure the quality and safety of structural components.Q345GJDZ156mm             2500112001.319Q345GJDZ156mm             2500116001.366Q345GJDZ156mm             2500114001.342Q345GJDZ156mm             2500115001.354Q345GJDZ156mm             2500114001.342Q345GJDZ156mm             2500115001.354Q345GJDZ156mm             2500120001.413Q345GJDZ156mm             2500120001.413Q345GJDZ156mm             2500120001.413 more>

$4700

Category: Metallurgy & Minerals/Common Steel/Other Steel Products

Company: 安阳奥丰商贸有限公司

Product Description: Q550C is a low-alloy high-strength structural steel with excellent mechanical properties and weldability. The hot rolling process characteristics of Q550C are mainly reflected in the following aspects:Good Weldability: Q550C steel has a low carbon equivalent, making it less prone to defects such as cracks during welding, thereby improving welding quality. Additionally, Q550C steel exhibits high deposition efficiency during welding, reducing production costs.High Strength: Q550C steel possesses high tensile strength and yield strength in the hot-rolled state, meeting the load-bearing requirements of various engineering structures. This gives Q550C steel broad application prospects in fields such as construction, bridges, and petrochemical engineering.Low-Temperature Toughness: Q550C steel maintains good toughness even at low temperatures, reducing the risk of brittle fracture. This makes Q550C steel suitable for applications in low-temperature environments.Corrosion Resistance: Through appropriate chemical composition and heat treatment processes, Q550C steel exhibits excellent corrosion resistance. In corrosive environments, Q550C steel has a longer lifecycle, lowering maintenance costs.Uniform Microstructure: During the hot rolling process, the microstructure of Q550C steel becomes homogenized, resulting in good performance stability. Additionally, the uniform microstructure formed during hot rolling enhances the wear resistance of the steel plate.High Production Efficiency: The hot rolling process offers high production efficiency. Q550C steel can be produced continuously during hot rolling, thereby increasing production efficiency and reducing costs.Flexible Specifications: The hot rolling process can produce Q550C steel plates of various specifications according to customer requirements. Currently, Q550C seamless steel tube products comply with the GB/T8162 standard, with specifications ranging from an outer diameter of 10mm to 760mm and a wall thickness of 2mm to 160mm.Easy Machinability: Hot-rolled Q550C steel plates have good machinability, allowing for easy cutting, grinding, drilling, and other processes, facilitating the manufacturing of various components.In summary, the hot rolling process characteristics of Q550C include high strength, good weldability, low-temperature toughness, corrosion resistance, uniform microstructure, high production efficiency, flexible specifications, and easy machinability. These properties make Q550C steel widely applicable in fields such as construction, bridges, and petrochemical engineering.Q550C14mm            2000100002.198Q550C14mm            2000100002.198Q550C14mm            2000100002.198Q550C14mm            2000100002.198Q550C14mm            2000103002.264Q550C14mm            2000102002.242Q550C14mm            2000104502.297Q550C14mm            2000100002.198 more>

$888

Category: Others

Company: 江苏广前建设集团有限公司

Product Description: New Cement Chimney Construction (Concrete Chimney Construction, New Concrete Chimney Construction)Business Scope:1. Undertake the construction, installation, reinforcement, demolition, and heightening of various chimneys and water towers (brick, concrete, steel structure); concrete shell slipform reinforcement; tilt correction; replacement of inner linings; cleaning and dust removal; painting aviation warning color rings; replacement and reinforcement of exposed metal components such as ladders, platforms, protective nets, lightning rods, and anti-corrosion painting maintenance.2. Cleaning, repair, anti-corrosion, waterproofing, and moisture-proof leak sealing for the inner and outer walls of chimneys, cooling towers, water towers, urea granulation towers, and silos.3. Surface treatment and specialized anti-corrosion for metal structures such as transmission towers, microwave towers, substation frameworks, bridges, various gantry cranes, steel beam roof trusses, gas tanks, (oil, acid, alkali, solvent) storage tanks, and chemical equipment.4. Cleaning, washing, repair, decoration, coating, and high-temperature fire-resistant coating for the exterior walls of high-rise buildings, large structures, factories, and coal conveyor trestles.5. Flooring EngineeringUndertake various terrazzo floors, epoxy, wear-resistant, hardened, dust-free, colored, anti-static, and metal (emery) cement-based wear-resistant floors; non-slip vibration-free driveways and colored stamped concrete floors; repair, cleaning, and waxing maintenance for various industrial floors.6. Underwater SalvageEngage in the construction of river, sea, and port docks; dry docks, shipways, sluices, ship lifts, channel dredging, land reclamation, port area storage yards, embankment revetments, underwater blasting and clearing of reefs, and corresponding projects such as silos, underwater foundations and bases, earthwork, navigation markers, trestles, coastal and offshore hydraulic engineering, installation of port handling equipment, installation of navigation structure equipment, underwater excavation, heavy lifting, and inland river salvage and obstacle clearance.7. Desulfurization and Anti-CorrosionCoal used in thermal power plants contains sulfur, which produces SO2 during combustion, affecting air quality after emission. Due to environmental pressures, flue gas desulfurization (FGD) has become the primary method for controlling SO2 emissions in thermal power plants. Therefore, FGD flue gas desulfurization units have become essential supporting projects in many power plants. Those that were not initially equipped are now installing FGD units. Wet desulfurization anti-corrosion for the inner linings of chimneys, absorption towers, and flue ducts in thermal power plants; anti-corrosion using acid-resistant borosilicate foam glass brick linings, vitrified ceramic tiles, glass flake anti-corrosion, spray polyurea, OM coatings, and acid-resistant mastic; repair of cracks and leaks in chimneys and flue ducts. more>

Negotiable

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company: 湖北华醇食品有限公司

Product Description: more>

Negotiable

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company: 湖北华醇食品有限公司

Product Description: more>

Negotiable

Category: Instruments & Meters/Measuring Instruments/CMM Coordinate Measuring Machines

Company: 泊头市利诺工量具有限公司

Product Description: Marble platforms and marble plates have uniform texture, good stability, high strength, and hardness, maintaining high precision under heavy loads. They are suitable for measurement tasks in industrial production and laboratories. Although marble platforms and marble plates are harder than cast iron, during inspection and testing processes, relative movement and friction with the products being inspected can cause wear. Since the products inspected using marble platforms generally require high precision, the accuracy requirements for marble platforms and marble plates are also very high. If the flatness of the marble platform or marble plate exceeds the tolerance, it cannot guarantee the accuracy and correctness of the inspection and testing results. Therefore, when the flatness of marble plates or marble platforms exceeds the tolerance, they need to be repaired, maintained, and calibrated. Manual grinding is used to restore the flatness of marble plates and marble platforms to meet the required flatness grade and work needs.Botou Lino Measuring Tools Co., Ltd. is a manufacturer engaged in the production, processing, sales, and grinding repair of marble platforms. We provide users with high-quality marble plates, marble platforms, and marble measuring tools, and undertake the repair of marble plates, marble platforms, and grinding repair services for marble platforms. With strong technical capabilities and comprehensive testing methods, we have multiple experienced technicians specializing in the repair of marble plates and marble platforms. Using the Qingdao Qianshao WL-11 electronic level for inspection, we offer short repair periods, reasonable costs, and reliable technology, ensuring that the repaired marble plates and marble platforms meet the precision requirements of the GB/T20428-2006 standard grade. We welcome all users in need of marble plate repair, marble platform repair, and marble platform precision restoration to contact us! more>