$2600

Category:

Company:

Product Description: The vertical style primarily uses stainless steel material, featuring 24 doors for 24 people. The number of doors for other sizes can be customized according to the customer's on-site layout.1. Shoe locker door locks: Mechanical locks and code locks can be used. However, since it is a 24-door shoe locker, it is recommended to use ordinary concealed locks. Even if it is not a storage locker at the same time, a push-type door lock that does not require a key can be used.2. Generally, the panel uses 1.0mm thickness. The shoe locker is mainly for placing casual shoes and employees' own shoes. Conventional plate thickness can be used, or thickened plates can be adopted according to our requirements.3. The conventional dimensions are 1000*400*1800-1950 and 1200*400*1800-1950, mainly based on the internal space and the on-site environment of use. more>

$15000

Category: Chemicals/Water Treatment Agents/Phosphorus Removal Agents

Company:

Product Description: Wastewater Decolorizing Agent CZTS-021.Wastewater Decolorizing Agent CZTS-02Introduction   Wastewater Decolorizing Agent CZTS-02 is a colorless or light-colored transparent viscous liquid. As an organic polymer compound, its spatial structure provides excellent adsorption and bridging effects, resulting in good coagulation and sedimentation performance.   The unique cationic groups in the molecular structure of CZTS-02 can combine with the anionic groups of color-causing substances in wastewater, forming insoluble precipitates and thereby decolorizing the water.   Wastewater Decolorizing Agent CZTS-02 can be used alone or in combination with common inorganic coagulants (aluminum/iron salts) for enhanced effectiveness.2.Wastewater Decolorizing AgentFeatures （1）Exhibits both coagulation and decolorization properties with strong water treatment efficacy. （2）Widely applicable in various industrial wastewater treatment fields including textile, printing and dyeing, papermaking, mining, ink, slaughtering, coking, chemical industry, and landfill leachate. （3）Non-oxidative action allows application at various stages: raw water, post-anaerobic, post-aerobic, and terminal water treatment.3.Wastewater Decolorizing AgentTechnical SpecificationsModelCZTS-02AppearanceColorless/Light-colored transparent viscous liquidpH (25% aqueous solution)2.0-5.0Active Ingredient Content≥50%4.Wastewater Decolorizing AgentUsage Method （1）Dilute the concentrated CZTS-02 agent 50-100 times and add it proportionally to the water. Stir for 5 minutes for reaction. （2）When used with aluminum or iron salts, first add the diluted CZTS-02 solution and mix thoroughly before adding aluminum/iron salts to improve treatment effectiveness.5.Wastewater Decolorizing AgentPackaging and Storage:   25kg/drum, packaged in plastic barrels; shelf life is 12 months.   The decolorizing agent is non-toxic, non-flammable, and non-explosive. Store in a cool, dry, well-ventilated area. more>

$120

Category: Others

Company: Henan Aonongyuan Greenhouse Engineering Co., Ltd

Product Description: Design requirements for greenhouse frame:1. Excellent light transmission function and high light utilization rate;2. Rapid heating and outstanding thermal insulation performance;3. Easy to operate, ventilate, and dehumidify, facilitating management;4. Sturdy structure, excellent wind resistance, and long service life;5. Simple frame processing, easy on-site installation, saving time and labor.The frame installation is prefabricated assembly, which offers the advantages of good corrosion resistance, reduced installation difficulty, and easy maintenance. Installation holes are pre-drilled according to design requirements, ensuring good compatibility and preventing water leakage issues later. The overall rigidity is strong, capable of resisting natural disasters. more>

$10000

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company:

Product Description: Chelating Agent CZAH—01 I. Product Introduction: Chelating Agent CZAH-01 is widely used in the bleaching of chemical, mechanical, and deinked pulp, as well as textiles with reducing bleaches. II. Technical Specifications: Appearance Colorless or light yellow transparent liquid pH Value 10~13 Density 1.1±0.05g/cm³ Chelation Value Calcium Chelation Value: ≤25mg/g (as CaCO₃) Iron Chelation Value: ≥200mg/g (as Fe³⁺) III. Product Functions: 1. Effectively inhibits the catalytic decomposition of reducing bleaches caused by metal ions. 2. Protects fibers, improves pulp whiteness, and inhibits pulp yellowing. 3. Effectively prevents the formation of precipitates from chemical reactions of metal ions such as calcium and magnesium during pulp bleaching. 4. Has certain dispersing ability and can improve the dispersibility of sodium silicate. IV. Packaging: Available in 1000kg or 200kg plastic drums, or customized according to customer requirements. V. Shelf Life and Storage: The product has a shelf life of 12 months. Avoid outdoor storage; it is suitable for indoor storage under ventilated and cool conditions. more>

Negotiable

Category: Machinery & Equipment/Electric Heating Equipment/Medium Frequency Power Supplies

Company: Shaanxi Deli Energy Technology Co., Ltd.

Product Description: Modular gas boilers offer convenient and economical service. **Staged Startup** 1. Modular gas boilers achieve "staged startup," saving fuel compared to a single large boiler. 2. The modular gas boiler system operates efficiently year-round by activating only the necessary number of modules. 3. As needed, modular gas boilers can start one unit at a time, initiating the next only when the previous reaches full load. **Redundancy** Heating requirements in places like schools and hospitals demand boiler redundancy to ensure uninterrupted heating in case of a failure. The modular gas boiler system inherently provides redundancy—if one module fails, the others continue operating, even if not at full capacity. **Elimination of Oversizing Issues** 1. A single heating boiler must be large enough to meet 100% load conditions during the coldest periods. 2. However, full-load operation is needed less than 20% of the heating season, leading to wasted capacity most of the time. Modular gas boilers closely match output to demand, eliminating the energy waste typical of large single boilers. **Simplified Installation in New and Existing Buildings** 1. Modular gas boilers are assembled, preset, and tested at the factory. 2. For new construction, there’s no need to plan early for boiler installation or incur costs before the boiler is needed. 3. Modular gas boilers can be installed anywhere, even on rooftops, and do not require special soundproofing materials. **Minimal On-Site Assembly** 1. Since each gas module is fully assembled at the factory, on-site installation requires minimal labor. 2. Installing a large single boiler in an existing building often involves disassembly and complex on-site reassembly with numerous parts, press-fittings, tie rods, controllers, nuts, bolts, etc. With modular boilers, the risk of lost parts is reduced, and the process is simpler. 3. Rooftop installation of boiler equipment is the most cost-effective heating solution, saving on floor space costs. more>

Negotiable

Category: Instruments & Meters/Analytical Instruments/Other Analytical Instruments

Company: Shenzhen Feisheng Technology Co., Ltd.

Product Description: Supply of Earthworks M50 Precision Measurement MicrophoneAlso availableM30,M30BX,M4260,M2015 more>

Negotiable

Category: Chemicals/Chemical Machinery/Atmospheric Boilers

Company: Shaanxi Deli Energy Technology Co., Ltd.

Product Description: I. Environmental Protection of Shaanxi Condensing Module Boilers The nitrogen oxide (NOx) emissions from Shaanxi condensing module boilers are as low as 15 mg/m³, which is below Beijing’s latest emission standard of 30 mg/m³. II. Energy Efficiency of Shaanxi Condensing Module Boilers The thermal efficiency of Shaanxi condensing module boilers reaches 103%–108%. Compared to conventional low-nitrogen combustion boilers, multiple Shaanxi condensing module boilers can reduce operating costs by approximately 30%–35%. III. Product Features of Shaanxi Condensing Module Boilers Safe and energy-efficient, environmentally friendly and highly efficient, long service life, compact footprint. Application Areas: Urban central heating, residential heating, villa heating and hot water supply, office environment heating for enterprises and institutions, energy-efficient and environmentally friendly hot water boilers, ultra-clean emission retrofitting, energy-saving and environmental upgrades for heating boilers. Safety: Shaanxi condensing module boilers significantly enhance safety. They feature sealed combustion with no long open flames, resistance to airflow interference, and comprehensive safety measures including gas pressure monitoring, air pressure monitoring, water flow monitoring, and flame supervision. Equipped with an intelligent self-diagnostic alarm system, these boilers are smarter and safer. The boiler body is connected to the atmosphere, ensuring that even in the event of deflagration caused by flue gas leakage, the boiler has sufficient explosion relief area to discharge excess gas outside the furnace, ensuring safety. In contrast, traditional single large boilers have enclosed combustion chambers. If gas leaks, the gas concentration inside the furnace increases, which can lead to an explosion upon ignition, resulting in severe consequences. Efficiency (Faster Heating): Shaanxi condensing module boilers utilize direct contact between flue gas and water for condensing heat exchange, enabling extremely fast water heating. They reach the required water supply temperature in a very short time, a feature unmatched by any other heating or domestic hot water equipment. Durability (Long Service Life): Made from alloy steel, Shaanxi condensing module boilers offer strong resistance to oxidation and superior resistance to acid and alkali corrosion compared to copper and lead. They are specially treated to prevent scale buildup, ensuring a service life of over 30 years. In contrast, large boilers typically last only 10–15 years. If large boilers are used, they must be replaced after 15 years, and when total operating costs are factored in, the average annual investment cost of modular boilers is 30%–40% lower than that of cast lead, copper, cast iron, or steel boilers. Compact Footprint: Shaanxi condensing module boilers feature a unique modular design, making them smaller in size and requiring less space than traditional boilers of the same capacity. They can be installed in basements, podium floors, or on building rooftops. A 1000 kW boiler occupies approximately 1.2 square meters. more>

Negotiable

Category: Machinery & Equipment/Boilers/Boilers & Auxiliary Equipment

Company: Shaanxi Deli Energy Technology Co., Ltd.

Product Description: I. Condensing modular boilers feature a modular design, simple structure, and flexible, convenient installation. The modular concept of condensing modular boilers essentially breaks down a single large boiler into several smaller units (each with a volume of less than 1 m³). This allows condensing modular boilers to achieve any desired steam tonnage through simple parallel combinations, making them suitable replacements for various heating and hot water boilers below 10 steam tons commonly used today. The modular design of condensing modular boilers gives them the following characteristics: 1. Each modular boiler serves as a backup for the others, significantly improving equipment and investment utilization as well as operational safety. If one module fails unexpectedly, the impact on heating is minimal—only 1/N (where N is the number of boilers). 2. Condensing modular boilers offer excellent scalability. As heating and domestic hot water loads 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 scale. 3. Condensing modular boilers have low infrastructure requirements, substantially reducing construction costs. Smaller modules can enter the boiler room through standard doors, and their layout can be customized to the room’s dimensions—for example, a narrow, elongated boiler room can accommodate a similarly arranged setup. These boilers do not require special foundations or expensive, earthquake-resistant brick-concrete structures, making them ideal for retrofitting and expansion projects. II. Condensing modular boilers have a long service life, are easy to maintain, and are highly durable. Fully premixed condensing low-nitrogen modular boilers are designed for a service life of up to 30 years. Constructed from alloy steel, these boilers offer strong resistance to oxidation and better corrosion resistance against acids and alkalis compared to copper or lead. Special anti-scaling treatments further extend their lifespan beyond 30 years, whereas large boilers typically last only 10–15 years. Replacing large boilers after 15 years, combined with operational costs, results in condensing modular boilers offering 30%–40% higher annualized cost savings compared to cast lead, copper, cast iron, or steel boilers. III. Condensing modular boilers feature advanced control systems for safe and reliable operation. 1. These boilers are generally equipped with the following safety devices: ① Flame reversal switch ② Leak-proof gas solenoid valve with excellent switching performance ③ Backdraft prevention switch ④ High-temperature limiter ⑤ Fully automatic ignition device ⑥ Gas leak detection interlock (optional) ⑦ Safety valve 2. Condensing modular boilers typically use atmospheric combustion, which greatly enhances safety. In single large boilers, improper purging during ignition can leave combustible gas in the furnace, leading to flare-ups or even explosions. In contrast, condensing modular boilers have a simple combustion process similar to residential gas water heaters: gas is delivered through distribution pipes to the burner, while air enters through slots at the bottom of the boiler, mixing thoroughly with the gas before ignition. Even if a gas leak causes a flare-up, the modular design provides sufficient venting area to expel excess gas safely. Large single boilers, with their enclosed combustion chambers, risk explosion if gas accumulates and is ignited. IV. Condensing modular boilers are clean, environmentally friendly, and low-noise. Large boilers require blowers to force air-gas mixtures into the furnace, generating significant noise that pollutes the environment and worsens working conditions. Condensing modular boilers use atmospheric combustion, eliminating the need for blowers and reducing noise to a faint "whooshing" sound during operation. Most condensing modular boilers use specially aluminized steel burners designed with aerodynamic principles to ensure highly efficient combustion. Tests show combustion efficiency exceeding 98%, with thorough burning reducing nitrogen oxide emissions in flue gas and minimizing environmental impact. V. Condensing modular boilers are highly efficient, energy-saving, and cost-effective to operate. Featuring high-efficiency heat exchange design, extensive heating surface layout, long flue gas travel, multi-pass heat exchange, and latent heat recovery technology, these boilers have small water volumes and provide instant heating with extremely high thermal efficiency. more>

$288

Category: Chemicals/Paints & Coatings/Anticorrosive Coatings

Company: Jiangsu Guangqian Construction Group Co., Ltd.

Product Description: Chimney Inner Wall Anti-Corrosion (Anti-corrosion with ceramic glazed tiles applied to the inner wall of chimneys, chimney)Business Scope:1. Undertake the construction, installation, reinforcement, demolition, and heightening of various chimneys and water towers (brick, concrete, steel structures); concrete shell slipform reinforcement; tilt correction; inner lining replacement; cleaning and dust removal; painting aviation warning color bands; 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, moisture-proofing, and leak sealing for the inner and outer walls of chimneys, cooling towers, water towers, urea granulation towers, and silos.3. Metal surface treatment and specialized anti-corrosion for transmission towers, microwave towers, substation structures, 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, 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 stamped concrete 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 systems, 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 marine engineering; installation of port loading and unloading equipment, installation of navigation structure equipment, underwater excavation, heavy lifting, inland river salvage and obstacle clearance.7. Desulfurization Anti-CorrosionCoal used in thermal power plants contains sulfur, which produces SO2 during combustion, affecting the air 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 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 linings, glazed 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>

$4800

Category: Others

Company:

Product Description: Both Q420B and Q420NB are steel grades defined by the Chinese national standard GB/T 1591-2018 "High Strength Low Alloy Structural Steels." Their main differences lie in the delivery condition and the possible rolling processes involved.Q420B:"B" indicates the quality grade of the material, typically associated with impact testing at -20°C.The delivery condition for Q420B is usually in the as-rolled state, meaning the steel is cooled directly after rolling without subsequent heat treatment processes.The hot rolling process helps achieve a fine grain structure, improving the material's strength and toughness.Hot-rolled Q420B may not undergo normalizing treatment, so the grain size may be coarser compared to that of normalized or thermomechanically controlled processed (TMCP) steel.Q420NB:"NB" indicates that the material is delivered in a normalized or normalized rolled condition. "N" stands for normalized, and "B" represents the quality grade, associated with impact testing at 20°C.Normalizing treatment involves heating the steel to a certain temperature, holding it, and then cooling it to improve the grain structure, enhancing plasticity and toughness.Q420NB may undergo a normalized rolling process, where normalizing is performed during rolling, helping refine the grain and improve the material's impact toughness.Comparison of Rolling Processes:Hot Rolling Process (Q420B):Steel is rolled at high temperatures and then cooled naturally or under controlled conditions to form the desired shape and dimensions.The hot rolling process improves production efficiency and reduces energy consumption.Hot-rolled materials have higher hardness and strength but may have slightly lower plasticity compared to normalized materials.Normalized Rolling Process (Q420NB):During rolling, the steel undergoes normalizing treatment to improve its mechanical properties and processability.Normalizing can reduce internal stresses generated during rolling and improve the material's uniformity.Normalized rolled materials typically exhibit better weldability and processability.In practical applications, the choice between Q420B and Q420NB depends on the requirements of the final product. If higher strength and hardness are needed, Q420B may be selected; if better toughness and weldability are required, Q420NB may be preferred. Additionally, normalizing treatment may increase production costs, so hot-rolled materials might be prioritized in cost-sensitive applications. During the design and manufacturing process, engineers need to select the appropriate material and process based on specific application needs and cost-effectiveness analysis.High-strength coil3.75mmQ420NB0.01500.0128.900High-strength coil3.75mmQ420NB0.01500.0128.710High-strength coil3.75mmQ420NB0.01500.0128.770High-strength coil3.75mmQ420NB0.01500.0128.780High-strength coil3.75mmQ420NB0.01500.0128.820High-strength coil3.75mmQ420NB0.01500.0128.550High-strength coil3.75mmQ420NB0.01500.0128.450High-strength coil3.75mmQ420NB0.01500.0127.530High-strength coil3.75mmQ420NB0.01500.0128.510High-strength coil3.75mmQ420NB0.01500.0128.120 more>

$4200

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

Company:

Product Description: Q390B is a high-strength low-alloy structural steel defined by the Chinese national standard GB/T 1591-2018. It is widely used in large engineering structures such as bridges, ships, boilers, and pressure vessels due to its high strength and good toughness. Its chemical composition mainly includes carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), and may contain trace alloying elements such as vanadium (V), titanium (Ti), niobium (Nb), etc. The addition of these elements helps improve the overall performance of the material.In European standards, the performance of Q390B may correspond to S460M or S460ML steel in EN 10025-6. S460 indicates that the material has a minimum yield strength of 460 MPa, and M denotes that the material has good impact energy absorption properties. These steels have high strength and good welding and processing properties similar to Q390B, making them suitable for applications requiring high strength and good toughness.The mechanical property requirements for Q390B include tensile strength, yield strength, elongation after fracture, and impact energy absorption. For example, for Q390B steel with a thickness less than or equal to 16 mm, the tensile strength ranges from 490 to 650 MPa, the yield strength is not less than 390 MPa, and the elongation after fracture is not less than 21%. These performance indicators ensure that the material can withstand significant loads and impacts in practical applications.In practical engineering applications, when selecting alternative materials, specific engineering requirements and usage environments must be considered, including chemical composition, mechanical properties, impact test temperature, etc. Engineers and procurement personnel should carefully compare the specific requirements of relevant standards and conduct material testing when necessary to ensure that the selected material meets engineering needs and safety standards.High-strength coil plate15.5mmQ390B0.01500.0129.190High-strength coil plate15.5mmQ390B0.01500.0129.110High-strength coil plate15.5mmQ390B0.01500.0128.960High-strength coil plate15.5mmQ390B0.01500.0128.910High-strength coil plate15.5mmQ390B0.01500.0129.040High-strength coil plate15.5mmQ390B0.01500.0129.070High-strength coil plate15.5mmQ390B0.01500.0128.100High-strength coil plate15.5mmQ390B0.01500.0128.830High-strength coil plate15.5mmQ390B0.01500.0128.680High-strength coil plate15.5mmQ390B0.01500.0128.940 more>

$888

Category: Others

Company: Jiangsu Guangqian Construction Group Co., Ltd.

Product Description: New Power Plant Chimney Construction (Power Plant Chimney Construction Company,Power Plant Chimney Construction and Installation)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 internal and external 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, 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 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, navigation lift systems, channel dredging, land reclamation, port area storage yards, embankment revetments, underwater blasting and reef clearing projects, as well as 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 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 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 thermal power plant chimneys, absorption towers, and flue ducts, using acid-resistant borosilicate foam glass brick linings, 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>

$4000

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

Company:

Product Description: Q355C angle steel is a low-alloy high-strength structural steel widely used in industries such as construction, bridges, and machinery manufacturing. It possesses excellent mechanical properties and welding performance, enabling it to withstand significant loads and pressure. The chemical composition of Q355C angle steel includes carbon, manganese, silicon, and other elements, with a reasonable ratio of these components providing the angle steel with good toughness and hardness. During processing, Q355C angle steel is easy to cut, weld, and bend, facilitating the realization of various complex structural designs. Additionally, Q355C angle steel offers good corrosion resistance, allowing it to be used in various environments and extending the service life of engineering projects. Due to its superior comprehensive performance, Q355C angle steel plays a crucial role in modern engineering construction. more>

$4400

Category: Metallurgy & Minerals/Common Steel/Steel Rails

Company:

Product Description: Q420D is a steel grade defined in the Chinese national standard GB/T 1591-2018 "High Strength Low Alloy Structural Steels," where the "D" indicates the quality grade of the material, typically associated with impact testing at -20°C. Q420D steel can be produced through different rolling processes, including hot rolling and normalized rolling. The following is a comparative analysis of hot rolling and normalized rolling processes:Hot Rolling Process:The hot rolling process involves rolling the steel at high temperatures, followed by natural or controlled cooling.Hot-rolled Q420D steel does not undergo subsequent heat treatment during production; it cools directly from the high-temperature rolled state to room temperature.This process helps achieve a fine grain structure, improving the material's strength and toughness but may sacrifice some plasticity.Normalized Rolling Process:Normalized rolling involves normalizing the steel during the rolling process, which means heating it to a certain temperature, holding it, and then cooling it at an appropriate rate to refine the grain structure.Normalizing treatment can reduce internal stresses generated during rolling, improve the material's plasticity and toughness, and enhance weldability.Normalized-rolled Q420D steel typically exhibits better impact toughness, especially in low-temperature applications.Comparative Analysis:Microstructure: Hot rolling may result in coarser grains, while normalizing helps refine the grains and improve material uniformity.Mechanical Properties: Hot-rolled Q420D may have higher yield strength and tensile strength, but its plasticity may be slightly lower than that of normalized-rolled material. Normalized rolling can enhance the material's plasticity and toughness.Production Cost: Normalizing treatment may increase production costs due to the additional heat treatment step.Application Areas: Hot-rolled Q420D is suitable for structural components requiring high strength and hardness, while normalized-rolled Q420D is more appropriate for applications requiring good toughness and weldability.In practical applications, the choice between hot-rolled and normalized-rolled Q420D depends on the specific requirements of the final product. If higher strength and hardness are needed, hot-rolled material may be selected; if better toughness and weldability are required, normalized-rolled material may be chosen. Additionally, cost and production efficiency are factors to consider when selecting the process.High-strength coil3.75mmQ420D0.01500.0128.820High-strength coil3.75mmQ420D0.01500.0128.550High-strength coil3.75mmQ420D0.01500.0128.450High-strength coil3.75mmQ420D0.01500.0127.530High-strength coil3.75mmQ420D0.01500.0128.510High-strength coil3.75mmQ420D0.01500.0128.120High-strength coil3.75mmQ420D0.01500.0128.400High-strength coil3.75mmQ420D0.01500.0128.520High-strength coil3.75mmQ420D0.01500.0128.480High-strength coil3.75mmQ420D0.01500.0128.540 more>

$888

Category: Machinery & Equipment/Compression & Separation Equipment/Screw Compressors

Company: Jiangsu Guangqian Construction Group Co., Ltd.

Product Description: New Construction of Hyperbolic Cooling Towers (Hyperbolic Cooling Tower New Construction Company,Hyperbolic Cooling Tower 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 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, moisture-proofing, and 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, storage tanks (oil, acid, alkali, solvent), and chemical equipment.4. Exterior wall cleaning, repair, decoration, coating, and high-temperature fire-resistant 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 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 machinery lifting, channel dredging, land reclamation, port area storage yards, embankment revetments, underwater blasting and clearing of reefs, and corresponding projects such as silos, underwater foundations, earthwork, navigation markers, trestles, 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.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 being retrofitted with FGD systems. Wet desulfurization anti-corrosion for the inner linings of chimneys, absorption towers, and flues 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 flues. more>

$600

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company: Guangzhou Yingke Chemical Technology Co., Ltd.

Product Description:  Phone.WeChat.Telegram: 13080853061Telegram: @rst888rstQQ: 1124045227 English Name: 0-Chlorphenyl Cyclopentyl Ketone Price: 600 RMB/kg Purity: 98.0% min CAS: 6740-85-8  Molecular Weight: 208.68  Molecular Formula: C12H13ClO   Melting Point: 96 Density: 1.16  Flash Point: >100°C  Refractive Index: 1.5470  Boiling Point: 140-160℃/0.54kPa Appearance: Light yellow liquid Packaging: 25kg/plastic drum or 50kg/plastic drum Application: Pharmaceutical intermediate, organic synthesis intermediate more>

Negotiable

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company: Hubei Huachun Food Co., Ltd.

Product Description: more>

Negotiable

Category: Chemicals/Chemical Intermediates/Intermediate Compounds

Company: Hubei Huachun Food Co., Ltd.

Product Description: more>

$2311

Category: Machinery & Equipment/Commercial Equipment/Bag Closing Machines

Company:

Product Description: Secret Methods of Motor Test Platforms: Breakthroughs in Experimental ResearchIn recent years, with the rapid development of industrial automation and smart manufacturing, the performance requirements for motors, as core power devices, have been increasingly heightened. As a critical tool for validating motor performance, the technical level of motor test platforms directly impacts the efficiency and quality of motor research and development. Against this backdrop, experimental research on motor test platforms has achieved multiple groundbreaking advancements, providing strong support for the technological upgrade of the motor industry.1. Breakthrough in High-Precision Dynamic Testing TechnologyTraditional motor test platforms often suffer from issues such as insufficient accuracy and slow response speeds in dynamic performance testing. By introducing high-precision sensor arrays and adaptive filtering algorithms, microsecond-level dynamic acquisition of parameters such as motor speed and torque has been achieved. For example, a team's magnetic encoder synchronous sampling system improved position detection resolution to 0.001 arcseconds, two orders of magnitude higher than traditional photoelectric encoders. This technological breakthrough enables performance analysis of motors under transient conditions, providing a data foundation for optimized motor design in fields such as electric vehicles.2. Integrated Innovation in Intelligent Testing SystemsThe application of artificial intelligence technology has become a key direction for upgrading motor test platforms. By mining historical test data through learning algorithms, new test platforms can automatically identify abnormal motor states and predict potential failures. An enterprise-developed "Test Assistant" system can automatically generate test plans based on motor types, reducing the traditional 2-3 day testing process to within 4 hours. The system's integrated digital twin technology also simulates motor performance under different load conditions in real time, significantly lowering the cost of physical testing.3. Maturation of Multi-Physics Field Coupling Testing TechnologyMotor operation involves the coupling of multiple physical fields such as electromagnetic, thermal, and mechanical effects, but traditional testing methods often only measure one aspect at a time. The breakthrough lies in the development of integrated test platforms that can simultaneously collect data on electromagnetic parameters, temperature distribution, vibration spectra, and more. A laboratory-built "holographic test chamber," combining a 128-channel high-speed data acquisition system with an infrared thermal imager, achieved mapping of motor performance under operating conditions. This technology provides a new research approach for the reliability design of high-power-density motors.4. Realization of Wireless Testing and Remote MonitoringThe deployment of wired sensors has long been a bottleneck in motor testing. The application of new wireless sensor network technology has resolved this challenge. Using low-power Bluetooth and UWB ultra-wideband technology, researchers developed miniature sensor nodes that can be embedded inside motors, enabling real-time wireless transmission of parameters from rotating components. One project team further established a cloud-based test platform on this foundation, supporting data sharing and collaborative analysis among multiple laboratories worldwide. This distributed testing model significantly enhances research efficiency and demonstrates unique advantages.These technological breakthroughs not only improve the accuracy and efficiency of motor performance testing but, more importantly, drive the transformation and upgrading of the entire industry's R&D model. In the future, with the introduction of new technologies such as 5G communication and edge computing, motor test platforms will evolve toward greater intelligence, networking, and standardization, providing continuous technical support for the motor industry's upgrade under the "dual carbon" goals. It is worth noting that the industrial application of these innovations still requires addressing practical issues such as cost control and standardization, which will demand collaborative efforts from industry, academia, and research sectors.Weiyue Machinery Ms. Xie 15350773479 more>

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

Company: Botou City Linuo Measuring Tools Co., Ltd.

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>