Overhead Crane Buyer’s Guide (Full Model Analysis + Selection Comparison + Industry Application)
From single girder to double girder, from explosion-proof to metallurgy, from electromagnetism to automation - an article to help you choose the right bridge crane
Today I will take the perspective of a front-line engineer, the full series of bridge cranes model, parameters, selection logic, and industry adaptation scene, step by step to make it clear. No need for complex terminology, easy to understand, to help you avoid purchasing mistakes, choose the most suitable equipment for yourself.
explosion proof double girder crane
Five core parameters that must be clear before purchase
Whether you choose single beam, double beam, or explosion-proof, metallurgical models, these five core parameters are the premise of selection.
1. lifting capacity (1T-360T)
Lifting capacity is the maximum weight of the equipment can be safely lifted, is the basic threshold of selection, but also the most can not be wrong parameters.
Light duty scenarios, such as small processing plants, general warehouses, lifting capacity is mostly 1-20 tons, single girder overhead travelling crane can fully cover.
Medium-sized heavy industry, machinery assembly workshop, lifting capacity in 20-100 tons, this situation is recommended to choose double girder models, structural rigidity is stronger, more stable operation.
Heavy metallurgy, large-scale equipment manufacturing, such as steel mill molten metal transfer, heavy components lifting, lifting capacity will reach more than 100 tons, or even 320t, 360t, you must use special casting cranes or metallurgical double girder cranes.
Here is a reminder, the selection must be reserved 10% -20% of the safety margin, do not just stuck on the maximum load selection. Long-term full-load operation, will significantly shorten the life of the equipment, but also may lay hidden safety hazards.
2. Span (6m-40m+)
Span refers to the distance between the two ends of the crane running track, directly determined by the width of your plant, you can not choose arbitrarily.
Conventional small and medium-sized plant, spanning 6-22 meters, single girder overhead cranes can be adapted to the simple installation, but also to meet most of the operational coverage needs.
Large-scale heavy industry workshop, steel yard, the span will be more than 22 meters, the longest can reach more than 40 meters, this kind of scene can only choose double girder overhead travelling crane.
The main girder structure of double girder model is more stable, which can withstand the load bearing pressure under large span and avoid deformation and shaking of the main girder during operation.
If there is a plan to expand the plant in the later stage, the span allowance must be reserved in advance when selecting the model, so as to avoid that the equipment can not be adapted to the new scope of operation after just a few years of use.
3. Lifting height
Lifting height is the distance from the ground to the highest position of the hook, the core depends on two factors: your operational needs, and the headroom of the plant.
For common workshops and warehouses, a lifting height of 6-12 meters is enough to meet the needs of regular material transfer and workpiece assembly.
High-rise plant, large equipment installation scenarios, the lifting height needs to reach more than 15 meters, which requires customized design, adjust the crane's own height and lifting mechanism.
Old plant transformation is most likely to ignore the headroom restrictions, many old plants have low headroom, conventional cranes can not be installed. In this case, you can choose partial hanging trolley type single girder crane or European low headroom model, which can effectively improve the utilization of headroom.
4. Working level (ISO 4301 / FEM / CMAA)
The working level is the “operational endurance” of the crane, which is determined by the frequency of lifting, load utilization and annual operating hours, and directly affects the service life and reliability of the equipment.
There are three types of global standards, just choose the one that corresponds to your working conditions.
ISO 4301 is categorized into M3-M8, FEM is categorized into A3-A8, and CMAA is categorized into Class A-F. The correspondence between the three is roughly as follows: M3 corresponds to A3 and Class A, and M8 corresponds to A8 and Class F. The three standards are also used for light work, such as small maintenance trucks.
Light work, such as small maintenance workshop, storage and low-frequency lifting, choose M3-M5 (A3-A5, Class A-C) class is enough.
Manufacturing, assembly workshop, medium frequency operation, choose M5-M6 (A5-A6, Class C-D) class, can adapt to the daily production of lifting needs.
Steel mills, metallurgical workshops, 24-hour continuous heavy-duty operation, must be selected M7-M8 (A7-A8, Class E-F) class, which is also the core requirement of metallurgical double girder overhead travelling crane standard.
Many customers only look at the tonnage without looking at the level of work, with M3 class equipment to do M7 class work, less than a year after the main beam fatigue, wear and tear of components, but the loss is not worth it.
5. Use of the environment
The use of the environment directly determines the crane protection configuration, but also to distinguish between general-purpose and special-purpose key, choose the wrong environment fit, the equipment is easy to fast aging failure.
Conventional dust-free, room temperature workshops, warehouses, with standard general-purpose models can be, without additional protection configuration, lower cost.
Iron and steel mills, foundries, high temperature, heat radiation, need to use metallurgical bridge cranes, the main beam and the electrical system should be done to resist high temperature heat insulation treatment.
Chemical, oil and gas, dust workshop, there are flammable and explosive risks, must use explosion-proof overhead travelling crane, but also according to the workshop hazardous level, select the corresponding explosion-proof level.
Aluminum electrolysis, high-pressure operation scenarios, need to insulated overhead travelling crane, do a good job of high-strength insulation protection, to prevent high-voltage leakage.
Intelligent factory, unmanned workshop, suitable for the selection of automated intelligent overhead travelling crane, can realize unmanned operation, docking workshop MES system.
Single Girder Overhead Crane Selection Guide
Single Girder Overhead Crane Application Scenario
The core advantage of single girder overhead travelling crane is low cost and simple installation, the main girder is a single load-bearing structure, the whole is lightweight, and does not need to occupy too much space in the plant.
Its lifting capacity is concentrated in 1-20 tons, suitable for light and medium working conditions, mainly used in standard industrial plants, warehouses, small processing plants for routine material transfer.
For customers with limited budget and low operating intensity, the single girder model is the most cost-effective choice, and the later operation and maintenance is also simple, with strong universal parts and low maintenance cost.
Single girder overhead crane model analysis
1️⃣ Electric single girder crane
This is the most basic and widely used single girder model, belongs to the standard configuration, with electric hoist to complete the lifting operation, the working level in the M3-M5 level.
Simple structure, low energy consumption, short installation and commissioning cycle, no need for complex foundation remodeling, and can be put into use soon after entering the field.
Mainly used in manufacturing, warehousing and logistics, light assembly and other conventional scenarios, but also small and medium-sized enterprises to purchase the most models, many customers will be concerned about the price of electric single girder cranes, which has the most advantageous price in the single girder series.
2️⃣ Electric Single Girder Suspension Crane
The biggest difference between the electric single girder suspension crane and the conventional single girder model is that the rail is directly suspended from the steel beam at the top of the plant, without occupying the ground space or building additional support columns.
Its running track is flexible and covers a wide range, which is suitable for scenes with low plant and limited column spacing, especially for small-span plants.
Installation will not destroy the ground layout, later if the plant is transformed, the track can also be flexibly adjusted, suitable for transformation type plant, small processing workshop use.
3️⃣ explosion-proof electric single girder suspension crane
On the basis of the electric single girder suspension crane, the full explosion-proof configuration is added, equipped with Ex explosion-proof motors and explosion-proof electrical appliances, and all electrical components are sealed and protected.
Eliminate sparks during operation, suitable for chemical, oil and gas, dust and other flammable and explosive suspension operation scenes, can pass the safety acceptance of the hazardous chemical industry.
Selection should pay attention to, its explosion-proof level needs to match the workshop of the hazardous chemical level, can not be arbitrarily selected.
4️⃣ explosion-proof electric single girder crane
It is a ground-supported single girder model with explosion-proof design, which is stronger than the explosion-proof electric single girder suspension model, and the protection level is also higher.
The body of the machine is made with dustproof and spark-proof treatment, which can cope with workshops with high explosion-proof requirements such as petrochemicals, paints, mines, etc., and is suitable for medium-load explosion-proof lifting operations.
All configurations are required to comply with GB/IEC explosion-proof standard, which is also the core judgment basis for the grade of explosion-proof overhead travelling crane.
5️⃣ Metallurgical Electric Single Girder Cranes
Specially designed for high temperature working conditions, the main girder is made of high temperature resistant steel, the electrical system is insulated and protected, equipped with high temperature resistant motor and double braking system.
Mainly used in steel mills, hot rolling workshop steel lifting auxiliary operations, can withstand high temperature radiation, to avoid equipment failure due to high temperature aging.
Although it is a single-beam structure, its working level can reach M5-M6 level, which can adapt to the basic high-temperature working condition of metallurgical workshop.
6️⃣ Manual Single Girder Crane
Completely rely on manual operation, do not need to access the power supply, the structure is the simplest, the cost is also the lowest, the maintenance is almost no additional costs.
It is suitable for scenes without power supply, light load and low frequency, such as small maintenance workshops, temporary work sites, and simple factories without power supply.
Its lifting capacity is small, generally below 5 tons, can only be used for occasional lifting of small and light workpieces, not suitable for high-frequency operations.
7️⃣ Offset Trolley Single Girder Crane
The most important feature is that the trolley off-set design, which can effectively improve the utilization rate of plant headroom, and is suitable for old plants with low headroom height.
Its lifting height is higher than that of conventional single girder models, which can meet higher lifting requirements in limited space.
Compact structure, flexible operation, will not affect the stability because of the offset hanging design, suitable for low plant, small span light load operation.
8️⃣ New electric single girder crane
On the basis of conventional electric single girder models, the main girder structure is optimized and lightweight design is adopted, which makes the body weight lighter and energy consumption lower.
Running noise, better stability, later operation and maintenance costs are lower than conventional models, suitable for energy consumption, noise requirements of the workshop.
Its adaptable scene and conventional electric single beam consistent, more cost-effective, is a lot of small and medium-sized enterprises of the preferred model.
9️⃣ European-style electric single girder crane
Adopting European design concept, compact structure, low headroom, equipped with frequency conversion control, smoother operation and more accurate positioning.
With simple and exquisite appearance, low noise and low energy consumption, it is suitable for high-end factories, precision manufacturing and modern industrial workshops.
As a preferred model for high-end manufacturing industry, its running accuracy can meet the lifting and assembling needs of precision workpieces, and the later operation and maintenance are more convenient.
Double Girder Overhead Crane Selection Guide
When must I choose double girder?
Many customers are confused about how to choose between single girder and double girder, in fact, as long as any of the following conditions are met, double girder overhead travelling crane must be chosen.
Lifting capacity ≥ 20 tons, heavy load and frequent operation, need high lifting height, or the operation scene is a steel mill, heavy industry and other heavy industry, single girder models of structural strength and stability can not meet the demand.
The double girder model has two load-bearing main beams, strong rigidity, large bearing capacity, can withstand long-term heavy load, high-frequency operations, and a longer service life than the single girder model.
Double girder overhead travelling crane model analysis
1️⃣ Hook Double Girder Overhead Crane (with slow speed)
This is the most classic and widely used general-purpose double girder model, with strong rigidity of the main beam, large load capacity and smooth operation, suitable for all kinds of heavy-duty general-purpose working conditions.
Conventional type is mainly used for heavy-duty lifting in heavy industry workshop, machinery factory and storage, while slow-speed type is suitable for precision assembly scenario with slow running speed and accurate positioning, which can avoid collision damage to precision workpieces.
Its structure is mature, the generality of accessories is strong, and the later operation and maintenance is simple, it is the largest purchasing volume in the double girder series.
2️⃣ Double girder overhead travelling crane with double trolley hooks
Equipped with two independent running trolleys, which can work synchronously or be controlled separately, it can complete the special lifting action that cannot be realized by single trolley.
It is suitable for overturning and synchronized lifting of extra-long workpieces and large components, such as steel structures and large equipment assembly scenes, which can improve lifting efficiency and ensure lifting precision.
The synergistic design of double trolleys can adapt to more complex lifting needs, and it is a common model for large heavy industry enterprises.
3️⃣ New electric hook bridge crane
Optimized transmission system, smoother running, lower energy consumption, lower operation and maintenance costs than conventional hook double girder models.
The structure design is more reasonable, the weight of the machine body is lighter, which requires less load-bearing for the plant, and the installation and commissioning is more convenient.
Suitable for medium-sized heavy-duty scenarios, not only to meet the load-bearing requirements, but also to control the later operating costs.
4️⃣ New electric hoist bridge crane
It belongs to light double girder scheme, with electric hoist lifting, compact structure, flexible lifting, very low failure rate, convenient operation and maintenance.
Suitable for medium load processing workshop, material transfer scenarios, is the economic double beam selection, budgetary constraints but the need for double beam stability of customers can be prioritized.
Its lifting capacity is concentrated in 20-50 tons, and the working level is in M5-M6 level, which can meet most of the medium-sized heavy load demand.
5️⃣ Electric Hoist Bridge Crane
The most mature structure and economical double girder model, using electric hoist to lift, the cost is lower than the conventional hook double girder, suitable for medium and light load scenarios.
With stable operation, low failure rate, easy access to spare parts and low maintenance cost in the later stage, it is the preferred model for many medium-sized enterprises.
Its adaptable scene is similar to the new electric hoist bridge crane, and the advantage is that the price is lower and more cost-effective.
6️⃣ Metallurgical Double Girder Overhead Cranes
Designed for continuous high-temperature operation in steelmaking and ironmaking, the working class reaches M7-M8, which is the core model of the standard metallurgical double girder overhead travelling crane.
It adopts redundant configuration of double brake and double drive, and the main girder is treated with high temperature resistance, corrosion resistance and fatigue resistance, which is able to operate continuously for 24 hours.
Mainly used in steel mills for molten metal transfer, high-temperature workpiece lifting, is the core lifting equipment in the metallurgical industry, can withstand harsh high-temperature working conditions.
7️⃣ Explosion-proof Electric Hoist Double Girder Bridge Crane
Equipped with electrical explosion-proof configuration, equipped with explosion-proof electric hoist, belongs to the economic explosion-proof double girder model, the cost is lower than the whole explosion-proof double girder.
Sealed protection design can eliminate sparks, suitable for chemical, pharmaceutical and other flammable and explosive factories, to meet the needs of medium load explosion-proof lifting.
Its explosion-proof grade meets the GB/IEC standard, which can pass the safety acceptance of the hazardous chemical scene, and the later operation and maintenance is also relatively simple.
8️⃣ Explosion-proof Double Girder Bridge Crane
Adopting explosion-proof design of the whole machine, the electrical system and mechanical parts are all protected against explosion, with higher explosion-proof level and more comprehensive protection.
Strictly following the requirements of electrical protection level, it can cope with chemical, oil and gas and other explosion-proof demanding scenes, suitable for heavy-duty explosion-proof lifting.
It has strong structural rigidity and can withstand heavy loads of 20-100 tons, making it the preferred model for heavy-duty operations in the hazardous chemical industry.
9️⃣ New double trolley overhead traveling crane
On the basis of the conventional double trolley model, the cooperative control system is optimized, the two trolleys are more accurate, and more complex lifting actions can be completed.
Adopting heavy-duty structure design, it has a larger load capacity and can adapt to heavy-duty scenarios of 30-100 tons, such as the lifting of large components and heavy equipment.
Suitable for large-scale heavy industry enterprises, ports and other heavy-duty, complex operation scenarios, can effectively improve the lifting efficiency.
🔟 New double girder crane
Adopting European standard structural design, the body is lighter and stronger, with lower energy consumption and smoother operation than conventional double girder models.
The appearance is simple and exquisite, suitable for modernized plants, which can meet the heavy load demand and enhance the overall aesthetics of the plant.
Its working level can reach M5-M8, which is suitable for all kinds of heavy load scenarios, and is the preferred model for high-end heavy industry enterprises.
Specialized / Special Condition Overhead Cranes
Electromagnetic Bridge Cranes
Equipped with strong electromagnetic suction cups, it is specially used for the handling of steel plates, scrap steel and ferromagnetic materials, without manual assistance and with high working efficiency.
Electromagnetic suction cups can automatically suck and unload materials, easy to operate, suitable for scrap yards, steel processing workshop, metallurgical storage area of the material transfer.
Its lifting capacity is concentrated in 5-50 tons, and the working level is in M5-M7 level, which can meet the batch lifting demand of ferromagnetic materials.
Grab, electromagnetic dual-purpose bridge crane
The biggest advantage is that one machine can be used in two ways, and it can be quickly switched between grab and electromagnetic mode, which is suitable for the scene of mixed handling of bulk materials and steel.
For example, in the raw material yard of a steel mill, there are both bulk materials (coal, ore) and steel, and the lifting of different materials can be accomplished without changing equipment.
Flexible operation, can effectively improve operational efficiency, reduce equipment investment costs, is the preferred model for multi-category material handling.
Grab and hook dual-purpose bridge crane
Equipped with dual configurations of hook and grab, it is easy to switch and suitable for the mixed operation of bulk materials and heavy workpieces.
The grab is used for lifting bulk materials, and the hook is used for lifting heavy workpieces and equipments, so one equipment can meet multiple operational requirements.
It is suitable for harbor, warehouse, heavy industry workshop and other working conditions, with strong versatility.
Upper Rotating and Telescopic Electromagnetic Hanging Girder Overhead Crane
Adopting the design of rotating hanging girder, it can work flexibly in 360°, and the hanging girder can be telescopic, which is suitable for the batch transfer of long steel warehouse and steel plate warehouse.
Electromagnetic suction cups can quickly adsorb steel plates and coils, and the rotating and telescopic functions can expand the working coverage and improve the transferring efficiency.
It is suitable for metallurgical warehouse and steel processing factory, which can realize the fast and accurate transfer of steel.
Lower Rotating and Telescopic Electromagnetic Hanging Girder Overhead Crane
The difference between the upper rotating model and the upper rotating model is the different direction of rotation. The lower rotating design is more suitable for precise transportation and can avoid collision with the surrounding equipment.
The flexible telescopic girder and accurate positioning make it suitable for precise lifting and placing of steel plates and coils, such as in precision steel processing workshops.
Its smooth operation and high positioning accuracy can reduce the loss in the material handling process.
Rotating Electromagnetic Hanging Beam Bridge Crane
Specialized in steel plate storage material transfer, the rotating hanging beam design can flexibly adjust the lifting angle, suitable for different specifications of steel plates and coils.
Electromagnetic suction cups are firmly adsorbed to avoid material falling, easy to operate, suitable for transferring and stacking of bulk steel plates.
The working level is M5-M7, which can meet the high-frequency lifting demand of steel plate warehouse.
High-end Special Purpose Bridge Crane
Insulated Bridge Crane
Specially used in electrolytic aluminum and non-ferrous metal electrolysis industry, it is made with high strength insulation protection, which can effectively prevent high voltage leakage.
The fuselage and electrical system are made of insulating materials to avoid current conduction and guarantee the personal safety of the equipment and operators.
Its lifting capacity is concentrated in 20-100 tons, which can be adapted to the high-pressure, heavy-duty operation scene of the electrolytic aluminum workshop.
Casting crane (320t four girder / 360t double girder)
It belongs to the special model for ultra-heavy load, divided into 320t four girder and 360t double girder, which is the core equipment of metallurgical industry, mainly used for molten metal transfer.
Adopting double brake redundancy system, double safety guarantee, avoiding accidents caused by single set of brake failure, which is also a mandatory requirement for metallurgical cranes.
The main beam is made of high-strength steel, which is resistant to high temperature and fatigue, and can withstand 24 hours of continuous heavy-duty operation, and the working level reaches M8.
320t casting crane mostly adopts four girder structure, 360t casting crane mostly adopts double girder structure, which can be selected according to the space of the plant and operational requirements, and its structural form covers double girder and double rail, four girders and four rails, etc., which is suitable for different tonnages of ultra-heavy-duty requirements.
Clean and Explosion-proof Bridge Crane
The bridge crane meets both clean and explosion-proof standards, and adopts dust-free painting and sealed dust-proof design to avoid generating dust and sparks.
It is suitable for medicine, semiconductor, precision manufacturing and other dust-free and explosion-proof scenes, which can avoid contaminated materials and eliminate potential safety hazards.
Its smooth operation and low noise can meet the precision lifting needs of high-end manufacturing.
Fixed-point crane for aerated concrete
It adopts fixed trajectory design with high repetitive positioning accuracy, and is specially used for the production and transfer of aerated concrete.
It can accurately locate the lifting and stacking position of aerated concrete blocks to avoid collision and damage and improve production efficiency.
With simple structure, stable operation and low failure rate, it is suitable for continuous operation in aerated concrete production workshop.
Automatic Intelligent Bridge Crane
Equipped with PLC control system, supporting remote monitoring, automatic positioning, able to dock with MES system to realize unmanned operation, it is the core product of automation intelligent bridge crane manufacturer.
It is suitable for intelligent factory and unmanned workshop, which can reduce labor input, improve operation efficiency and avoid human error.
It can realize multi-target continuous positioning operation, and the intelligent anti-shaking technology can ensure that the handling error is controlled in a very small range, which is suitable for high-end manufacturing, aerospace and other precision scenarios, and its intelligent control system can realize the functions of laser scanning and positioning, digital twin monitoring and so on, so that the equipment can become a “thinking handling robot”.
Steel Plate Automated Handling Bridge Crane
Equipped with laser positioning system and automatic gripping system, it can automatically recognize the position of steel plate, accurately grasp, transfer and stack.
It is suitable for batch steel plate handling in steel plate processing plants and steel yards, which can effectively improve operational efficiency and reduce labor costs.
Smooth running, accurate positioning, avoiding scratches and collisions in the steel plate handling process, reducing material loss.)
Technical Parameters Comparison Module
| Type | Tonnage Range | Working Class | Explosion-Proof | Metallurgical | Automation Adaptation |
| Single Girder General Type | 1-20T | M3-M5 (A3-A5, Class A-C) | Optional | Optional (Metallurgical Single Girder) | Basic Adaptation |
| Single Girder Explosion-Proof Type | 1-16T | M3-M5 (A3-A5, Class A-C) | Yes | No | Basic Adaptation |
| Single Girder Metallurgical Type | 5-20T | M5-M6 (A5-A6, Class C-D) | No | Yes | Basic Adaptation |
| Double Girder General Type | 20-100T | M5-M8 (A5-A8, Class C-F) | Optional | Optional | Support Adaptation |
| Double Girder Explosion-Proof Type | 10-50T | M5-M6 (A5-A6, Class C-D) | Yes | No | Support Adaptation |
| Double Girder Metallurgical Type | 20-360T | M7-M8 (A7-A8, Class E-F) | No | Yes | Support Adaptation |
| Electromagnetic Special Type | 5-50T | M5-M7 (A5-A7, Class C-E) | Optional | No | Support Adaptation |
| Intelligent Automation Type | 5-100T | M5-M8 (A5-A8, Class C-F) | Optional | Optional | Full Adaptation |
Recommended Comparison for Industry
| Industry | Recommended Model | Adaptation Description |
| Manufacturing Industry | Single Girder General Type, European-Style Electric Single Girder Crane | Suitable for 1-20T light to medium load, stable operation and high cost performance, meeting the needs of conventional material handling and assembly. |
| Warehousing and Logistics | Electric Single Girder Suspension Crane, Single Girder General Type | Space-saving, flexible operation, suitable for low-frequency and light-load lifting, ideal for warehouses and logistics centers. |
| Steel Mill/Metallurgy | Metallurgical Double Girder Overhead Crane, Foundry Crane (320t/360t), Electromagnetic Overhead Crane | High temperature resistant, double braking, suitable for heavy-load and continuous operation, meeting the needs of molten metal and steel handling. |
| Chemical/Oil & Gas | Explosion-Proof Electric Single Girder Crane, Explosion-Proof Double Girder Overhead Crane, Explosion-Proof Electric Hoist Double Girder Overhead Crane | Full explosion-proof configuration, complying with GB/IEC standards, suitable for flammable and explosive scenarios, eliminating potential safety hazards. |
| Electrolytic Aluminum | Insulated Overhead Crane | High-strength insulation protection, preventing high-voltage leakage, suitable for high-voltage and heavy-load operations in electrolytic aluminum workshops. |
| Steel Plate Warehouse/Steel Processing | Electromagnetic Beam Crane Series, Automatic Steel Plate Handling Overhead Crane | Precise positioning and automatic grabbing, suitable for batch handling of steel plates and coils, improving operation efficiency. |
| Smart Factory/Unmanned Workshop | Intelligent Automatic Overhead Crane | PLC control, MES docking, unmanned operation, suitable for the automated production needs of smart factories. |
| Pharmaceutical/Semiconductor | Clean Explosion-Proof Overhead Crane | Dust-free and explosion-proof dual standards, avoiding material contamination, suitable for high-end precision manufacturing scenarios. |
| Aerated Concrete Production | Fixed-Point Crane for Aerated Concrete | Fixed trajectory, high repeat positioning accuracy, suitable for the production and handling of aerated concrete blocks. |
Common Purchasing Misconceptions
After so many years of bridge crane sales, we have seen too many customers because of cognitive bias, spending money, but also affect the production progress.
These misunderstandings are very common and can be avoided by paying more attention to them when purchasing.
Only look at the price, ignoring the quality and suitability. Many customers are greedy for cheap, choose low-priced equipment, frequent maintenance, downtime losses far more than the money saved in the early stages. Especially explosion-proof, metallurgical scenarios, low-priced equipment simply can not meet the safety standards, easy to bury hidden dangers.
Ignore the level of work. This is the most easy to step on the pit, many customers only look at the tonnage, with M3 level equipment to do M7 level work, less than a year on the deformation of the main beam, wear and tear of components, and even need to replace the equipment in advance.
Failure to consider the future expansion. Later expansion of the plant, the lifting capacity and span of the equipment is not enough to adapt to the new operational requirements, and can only be re-procured, resulting in double investment.
Failure to do structural calculations. Neglecting the load-bearing capacity of the plant, after the installation of the crane, the main beam sinking, rail deformation, not only can not be used, but also need to rectify the plant, delaying production.
Explosion-proof grade selection error. Chemical, oil and gas scene, selected ordinary explosion-proof model, does not meet the workshop hazardous grade, can not pass the safety acceptance, can only rework and replace.
Metallurgy did not do double braking. Metallurgy scene lifting high temperature molten metal, double braking is a mandatory safety requirement, single brake equipment failure, will cause serious safety accidents.
FAQ Module
How much does an overhead crane cost?
There is no fixed standard for the price, which is mainly determined by the lifting capacity, span, configuration and model, and the price varies greatly with different parameters.
Single girder universal model price is the lowest, 1-20 tons of the price range is wider; double girder, explosion-proof, metallurgical model prices rise in turn.
For example, the price of electric single girder cranes is relatively affordable, while 320t casting cranes, automated intelligent bridge cranes, because of the high-end configuration, the price will be much higher, the specific need to combine the parameters of the accounting offer.
Single girder and double girder difference?
The core difference in load-bearing capacity, structural stability and adaptability of the scene, not a simple “single beam” and “two beams” difference.
Single girder models are lightweight, low cost, suitable for 1-20 tons of light and medium load, low-frequency operation, simple installation, low operation and maintenance costs; double girder models have strong rigidity, high load capacity, suitable for heavy loads of more than 20 tons, high-frequency operation, and longer service life.
Simply put, choose single girder for light load and double girder for heavy load; choose single girder for conventional scenes and double girder for heavy industry and metallurgical scenes.
Must metallurgical cranes have double brakes?
It must be equipped with double brakes, which is a mandatory requirement of metallurgical double girder overhead travelling crane standard and the core of safety guarantee.
Metallurgical scene lifting high temperature molten metal, once a single set of brake failure, will cause material falling, explosion and other serious accidents.
Dual braking is a redundant safety configuration, which ensures that when one set of brakes fails, another set of brakes will take over in time to avoid safety accidents.
How to choose the explosion-proof level?
The explosion-proof grade is mainly selected according to the type and grade of the hazardous chemicals in the workshop, and the core follows the GB/IEC explosion-proof standard, which is also the basis for determining the grade of explosion-proof overhead travelling crane.
For chemical, oil and gas and other flammable and explosive gas scenes, choose Ex d II BT4 grade; for dust flammable and explosive scenes, choose DIP explosion-proof grade.
When purchasing, it is better to provide the workshop's hazardous chemical test report, we will recommend the right explosion-proof grade according to the report to avoid choosing the wrong one.
How long is the lifespan of overhead cranes?
The life span mainly depends on the working level, operation frequency and maintenance, the life span of regular model is 15-20 years with reasonable maintenance.
Metallurgy, explosion-proof and other special models, the working level is high, the structure is more solid, according to the standard operation and maintenance, the life span can reach 20-25 years.
Regular maintenance is very important, such as lubricating parts, check the braking system, can effectively extend the life of the equipment, reduce the occurrence of failures.
How much more expensive is an automated bridge crane?
It is 30%-50% more expensive than a general purpose model of the same tonnage, the exact price difference depends on the complexity of the automation configuration.
For example, simple automatic positioning, remote control, the price difference is relatively small; complex PLC control system, MES docking, automatic gripping, the price difference will be greater.
Although the initial investment is high, but the long-term can reduce labor costs, improve operational efficiency, suitable for high-frequency, unmanned operation scenarios.
Henan Mine Crane Factory Custom
Henan Mine Crane can provide the full range of bridge cranes mentioned in this article, all products strictly follow the ISO/FEM/CMAA international standards, support customized design, global installation and commissioning, and a full range of after-sales service.
With our professional technical team and cost-effective equipment solutions, we will accurately match your model, avoid purchasing mistakes, and help you complete lifting operations efficiently and safely, so as to win the global market hand in hand!
