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How to Choice a Crane for Hot-Dip Galvanizing Workshop?

DATE: May 2nd, 2023
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1. Double hoist single girder travelling crane projects background 

In JAU. 2022, Kingda crane got a mail from Nepean Australia, consulting about double hoists single girder overhead travelling crane (double hoists single girder EOT crane) , they described its workshop and crane in the mail by this:
there are 3 sets old crane needed to be replaced. Because all cranes are working in very aggressive atmosphere: hot, acid mist corrosion, heavy duty and limited space for installation, all cranes design, assembling and painting need to put corrosion resistance in first place.

Nepean, a global organization and industry leader in mining equipment and industrial manufacturing, was founded in 1974, with a proud Australian heritage and excellent reputation of consistently delivering superior outcomes for its customers.
Galserv, Galintel and Weldlok are Nepean’s large manufacturing base for building & infrastructure products. Galserv and Galintel are two of the largest hot-dip galvanizers in Australia, products across construction, infrastructure, fabrication, mining and mineral resource.

 
Crane Number Clear Width Floor to
Top of Track
Height to lowest obstruction Span 
(Centre of Rails)
Total Capacity # of Hoists Hoist Capacity Environment
  1 2 3 4 kg   Kg  
1 12030 5680 6475 11680 6500 2 3200 Corrosive
2 12030 5680 6475 11680 6500 2 3200 Corrosive
3 12030 5680 6475 11680 6500 2 3200 Corrosive
4 12030 5680 6475 11680 6500 2 3200 Corrosive
5 6304 5630 6030 5620 5000 1 5000 Dusty
6 18570 5225 6455 18290 6300 1 6300 Dusty
7 18570 5225 6455 18290 6300 1 6300 Dusty
8 18570 5225 6455 18290 6300 1 6300 Dusty
9 12030 5680 6475 11680 6500 2 3200 Corrosive
10 6304 5630 6030 5620 5000 1 5000 Dusty


Also, Nepean attached workshop’s photos, showing workshop and cranes’ condition
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2. Double hoist single girder travelling crane technical solutions

How to choose a crane for hot-dip galvanizing workshop?

Kingda Crane design and build to customer’s specific requirements with its extensive expertise and knowledge. Following Nepean’s description and requirement, Kingda Crane provides own solution, for highest efficiency, availability and safety. Focusing on ”aggressive atmosphere ”, ”acid mist” and “high corrosion” , we carry out detailed consideration and communication on the project, finally Kingda Crane team decide to put emphasis on “anti-corrosion”. anti-corrosion is used in any corner of the double hoist overhead travelling crane:
         
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1 control panels and control box material must be FRP, As the area is so corrosive the control panel  and  enclosers must be FRP
IP 55 Rating experience shows FRP is more corrosion resistance than stainless ones  e.       
No ventilation on the electrical board. The acid will go in.
2 power supply for cross travel C Channel will corrode soon. Only steel rope and roller can be use.                    Cable tie will corrode within a short day. We use copper wire for the use, Stainless Steel cable tie is acceptable
3 limit switch Up and down limit switch for the hoist
The end proximity switches for the hoist on the girder
Photoelectric sensor for the end of the travels of the girder.
All the sensors must be in steel or FRP encloser
4 Painting International brand:Jordan
1st coat zinc anode 402 (or equivalent) at 75 μm
2nd Coat Duramax GFX (or equivalent) at 250 μm
3rd Coat Duramax GFX (or equivalent) at 250 μm
-Color RAL 1003 (Signal Yellow or equiv.)
Total painting thickness 575μm
5 Motors and electrical component protection class Insulation class: F                                                   
protection class: IP55                                                 
ABM gearbox and motor
3-phase 415V 50Hz
6 Flat bar stitched and welded A 50mmx 6 mm flat bar is needed to be stitched to the main girder where the wheels for the hoist travels as the area is corrosive and can be replaced.
7 Steel Conduit for cables Weld Steel conduit to run the wires on the girders
8 motor paint Motors need to be painted 2 pack
 

3. End user feedback

Now, double hoists single girder overhead travelling crane (double hoists single girder EOT crane)
have been installed in Galintel’s workshop, Electrical engineer Mr. Michael write in his mail like this:

‘ I am pleased to inform you that the installation of the cranes has been successfully completed and all of them are operational. We also satisfy for all corrosion resistance measurement, hope there will be a cooperation in near soon, thank you for your and your technical team’s hard work

 
              
 
              
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