Brief introduction of Pakistan flat steel mill
The client is a group company established in 2005 and started commercial operations in 2012. It is one of the largest manufacturers of flat steel - cold rolled and hot-dip galvanized coils, headquartered in Port Qasim, Karachi, where the factories most suitable for the export market are located.
It is a very influential local steel company, mainly producing cold-rolled steel, hot-dip galvanized coil and other steel products, located in Karachi.
Initial inquiry
In February 2016, I received an inquiry for a steel mill bridge crane from a Pakistan steel mill, and the information is as follows.
30 tons - 21.966M span, lifting height: 9m, A7 working height, remote control, double girder bridge crane, the customer specifically mentioned that the continuous rate of all motors must be 60%.
At present, the Pakistani customer has 2 existing cranes, including a 30-ton bridge crane and a 25-ton bridge crane on the same span. Now, he plans to add another 30-ton bridge crane to the same span. Two remote control and ground operation.
In the subsequent communication, the customer of the steel mill requested the lifting motor to achieve 100% duty cycle, 60% running motor, full-speed frequency conversion, and C-type hook spreader. In addition, the motor brands are designated as Siemens and Schneider Electric. The Pakistani customer also said that during the production period, he would visit the factory at least twice to supervise the production.
Crane factory visit
In late October 2016, business managers and engineers visited Pakistan and customers to inspect the work site. The visit established a foundation of trust for both parties. Pakistani steel mill customers plan to expand their factories and sent new inquiries.
Double Girder Overhead Crane
Capacity |
Span |
Lifting Height |
Quantity |
30 ton |
24 |
12 |
2Nos. |
16 ton |
24 |
26 |
1No. |
5 ton |
24 |
32 |
1No. |
30 ton |
18 |
12 |
5Nos. |
45 ton |
18 |
12 |
1No. |
Control |
Wireless Remote + Cabin Control |
Power Supply |
415V 50 Hz 3 Phase |
Control Voltage |
24 Volt |
Working Class |
A8 |
Duty Class |
Hoisting : M8 |
Long Travel : M8 |
|
Cross Travel : M7 |
|
Speed |
Hoisting : 1 ~ 6 m / min |
Long Travel : 5 ~ 50 m / min |
|
Cross Travel : 2 ~ 30 m / min |
|
Motor Type |
VFD |
Motor Cooling |
Forced |
Cycle Duty Frequency |
Hoisting : 100% |
Long Travel : 60% |
|
Cross Travel : 60% |
|
Ambient Temperature |
Up to 50 deg C |
Degree of Protection |
IP 55 |
Brand of VFD |
Schneider |
Brand of other Electric Components |
Schneider |
Brand of Motor |
SIEMENS |
Brand of Gearboxes |
SEW |
Lifting Hook |
Motorized |
Application |
Indoor |
Overloading Protection |
Yes |
Working Condition |
24 / 7 |
Long Travel Power Supply |
As per your Design |
Long Travel Rail |
As per your Design |
Long Travel Wheel Design |
Both Side Flange Wheel (Collar Type) |
No. of LT Wheels |
2 Drive and 2 Non Drive |
Cross Travel Rail |
As per your Design |
Cross Travel Wheel Design |
Both Side Flange Wheel (Collar Type) |
No. of CT Wheels |
2 Drive and 2 Non Drive |
Final order of steel mill overhead crane
Details of these steel mill overhead cranes were discussed until September 2017, and the finalized list of purchased steel mill material handling equipment was as follows:
Order confirmation, production, delivery:
By November 2017, 30% of LC's advance payment will be received, and the delivery time will be 5 months, and the production, delivery, customs declaration and other matters will be started.
During the production period, the Pakistan customer did not send anyone to supervise the work on site, but only inspected the overhead crane equipment before delivery. The shipment will be divided into two batches of bulk carriers for the main girder and containers for others. All equipment transportation will be completed by April 2018, and the installation work under the guidance of our engineers will be completed in October 2018. By April 2019, the customer had purchased spare parts totaling $40,000, including wheels, resistors, thrusters, couplings, some motors, brakes, etc.
After sales:
In August 2019, our crane engineer went to the site to maintain the steel mill overhead crane machine, and found and verified that the frequency converters of 3 overhead cranes were adjusted privately by unprofessionals, resulting in unstable speed during the lifting process. The engineer reset the frequency converter parameters and everything Back to normal. During the first routine maintenance, electrical appliances, drives, and all mechanical parts were inspected and maintained, and no abnormalities were found.
Summarize:
The Pakistan steel mill customer knows very well about cranes, because he has been using cranes all the time, he is very professional about crane configuration parameters, etc., he is rigorous and serious in his work, and has high standards. A large number of overhead crane spare parts ensure that these 13 steel mill overhead cranes work normally for at least 5-10 years without delaying production.
The establishment of trust is the most important. Before the transaction, there were two meetings, one customer visit, and one our return visit. After the customer learned about our production capacity, management, export strength and after-sales guarantee, their cooperation intention was very clear, and they were decisively weed out the other competitors. Our on-site maintenance within one year of use is also crucial, and it also makes customers feel at ease with our after-sales service!