How to address the issue of oversized transportation for large-scale equipment in coal chemical industries?
Thread Content
Large-scale coal chemical plants have many pieces of equipment that are extremely large, tall, long, and wide, making it impossible to transport them along many roads. Yet many of these large devices are inseparable units; so how is transportation or manufacturing of such oversized equipment handled? This post was last edited by chqi527 on 2007-12-22 13:53.]
The development of coal chemical industry is mainly concentrated in Inner Mongolia, Shaanxi, Xinjiang, and Guizhou; transportation is primarily discussed in terms of these regions, as water transport is very difficult! It still relies on roads; everyone should think of more solutions. The transportation of heavy goods has indeed become one of the main bottlenecks in the development of coal chemical industries in the western region. The second key issue is water resources.
Find a transportation company specialized in moving large items; this is how the towers produced by our company are transported, with charges based on tons-kilometers
The design institute doesn’t need to worry about this. However, in many cases the water routes are considered first; for land routes, it’s necessary to turn to professional transportation companies
There is a company named Lishen Transportation in Shandong, located in Qingdao; it has connections with the military and is capable of transporting very large items. It seems that all the large-scale shipments for Yangzi Petrochemical are handled by them.
Indeed, transporting oversized equipment is a major challenge. Currently, the elevation of ordinary road culverts is below 4.5 meters; therefore, waterways should be used whenever possible. If it is necessary to use roads, care should be taken during design to avoid overly large diameters. Especially for high-pressure and high-temperature equipment, one unit may need to be supplemented with two or even three units to meet the requirements. Nowadays, equipment under normal pressure is usually manufactured on-site. For high-pressure equipment that cannot be manufactured nearby, the required diameter is generally below 4.2 meters. As a last resort, on-site manufacturing becomes necessary; otherwise, situations like that at Yankuang Guotai occur, where bridge culverts on roads have to be removed and the area around the roads cleared
Come up with some real solutions to the problem, in more detail, please help
Road transportation generally requires preliminary investigation and the planning of a delivery route; any necessary dismantling is needed, and the shipping costs are quite high. Segmented transportation and on-site assembly are a good solution; many oversized equipment items are handled in this way.
It’s really a practical issue, being at school every day. I had no idea there were so many difficulties involved in building a factory… But from what’s mentioned above, it seems there are only three options: 1) water transport, 2) cooperation with large transportation companies, 3) transporting the components in stages with the help of transportation companies and then carrying out welding. However, thorough preparation is needed before transportation.
For exploration, what types of vehicles are used? There are extendable vehicles, those with large frames, and low-platform vehicles
Large items are usually transported by water, but those that are too heavy have to be welded on-site! For example, the 2,200-ton reactor of Shenhua has its barrel sections manufactured in France, where they are then assembled and welded on site.
Recently, I have been paying more attention to the disaster-stricken areas in Sichuan. The biggest consequence of the Wenchuan earthquake was the barrier lakes. Seeing helicopters transporting large construction equipment in the air gave me an idea; it might be possible to apply this approach in the field we are discussing. It may cost a bit more, but it saves time and effort and is safe. Although operating it might be challenging, it’s possible to overcome that as well. If transported by land, it’s inevitable to cross bridges and tunnels; after all, it’s not possible to demolish those bridges and tunnels. It seems there’s no other solution, except to carry out processing and manufacturing nearby. This post was last edited by GSP on 2008-5-30 15:56]
Upstairs: The largest helicopter in the world today, the Mi-26, can only lift a load of 20 tons! So the method of on-site assembly is still practical and feasible.
There are usually two options: 1. Professional shipping companies, which incur high costs; the goods can arrive at domestic ports such as Dalian or Tianjin from foreign ports, and then be transported by land； 2. On-site manufacturing, assembly, and welding – this method is used for many large-scale, oversized equipment.
The transportation conditions are favorable; for example, coastal waterway transportation offers lower costs when considering the overall logistics； In inland areas, most locations lack the necessary transportation facilities, so it is necessary to build machine processing plants on-site and carry out welding work there as well.
Could you please tell me: pressure rating, sheet thickness, and heat treatment method?
If 5 Mi-26 helicopters are used simultaneously, can a 100-ton device be lifted? Could a method combining long-range heavy transport aircraft with short-range heavy helicopters for lifting be used as well? Total amateur~:lol Last edited by kamikoppie on 2008-6-4 16:01]
For oversized equipment: if it is unitary and cannot be split, toll booths and bridges can only be removed along the route of transportation； If the cost is too high, it can be lifted across bridges and culverts using a crane ； It can be in a modular design; for those requiring complex processing, the components can be manufactured in segments at mechanical processing plants and then transported to the site for assembly and welding ； Finally, after purchasing the processed sheets, they are assembled and welded directly at the construction site!
First of all, transportation considerations must be taken into account when selecting a location – whether to carry out welding on-site or transport the entire structure. The process provider has also taken transportation issues into consideration when preparing the process package, and there are basic solutions available. For overall transportation, it is necessary to seek a professional heavy-load transportation company to develop a plan; the costs are very high – a large-scale project can incur transportation expenses in the hundreds of millions. One also needs to think broadly: sea transport, land transport, inland waterway transport, transporting goods via alternative routes before entering the country – this is as well a profitable business with great potential.
Processing is carried out on-site in the factory; many manufacturing plants do this these days