Length of distillation column segments
Length of distillation column segments
(OP)
My first question here, so let's give it a try...
We construct the distillation column, for example 50m long. Because of the transport we have to make it in a few segments. What i want to know is, are there any (standard) advices/restrictions on how long these segments should/must be? Also, are there any advices on how they should be connected, welded or in some cases it can be a flange?
In some literature i found that max length of one segment can be 12m, but there are no any explanation about it. I asked some engineers, they said it's because of the length of trucks trailer.
I'm young engineer, so please have some understanding. :)
Thank you in advance!
We construct the distillation column, for example 50m long. Because of the transport we have to make it in a few segments. What i want to know is, are there any (standard) advices/restrictions on how long these segments should/must be? Also, are there any advices on how they should be connected, welded or in some cases it can be a flange?
In some literature i found that max length of one segment can be 12m, but there are no any explanation about it. I asked some engineers, they said it's because of the length of trucks trailer.
I'm young engineer, so please have some understanding. :)
Thank you in advance!






RE: Length of distillation column segments
RE: Length of distillation column segments
Thank you sir for a quick answer.
RE: Length of distillation column segments
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Length of distillation column segments
Some over-dimension shipment issues are minor, such as obtaining permits, route optimization, restricted travel hours or days through certain cities etc. Others some add cost- special trailers and/or tractors, pilot cars, escorts, police escort etc. If you need to start relocating utility wires, leaving the highway at every overpass, or switching modes of transport to get around certain obstacles (tunnels etc.)
RE: Length of distillation column segments
But, in cases where you require specialty transportation (which is expensive) you can get twice that.
RE: Length of distillation column segments
One way or the other, every 2 1/2-3 1/2 storeys is where I've seen typical splices.
RE: Length of distillation column segments
RE: Length of distillation column segments
We have to know much more about your fabricated vessels to have a meaningful discussion. What weights, diameters, lengths, structural strength of the vessels themselves, max. dia. at flanges, nozzles, and the like for clearance studies? Your company must be shipping these types of vessels now, how are they doing this? Talk with some transport people within your company or contractors who might do this function for you. They can help you understand clearance and size issues. They can explain the various transport equipment available, travel routes available, etc. If the vessel won’t fit on a std. flatbed or low deck (lowboy) trailer, you are almost automatically in a special transport realm. If the vessel is strong enough it can be placed on a low level dolly up at the tractor and another steerable dolly in the rear, and hung only a few inches above the pavement to improve topside clearances. 150' is not an impossible length for this type of movement. The transport people will have to do a clearance study to determine the route of transport, but those people do this for almost every load they move, so this isn’t new to them. This special transport and its added costs comes into play when field assembly cost become very high, such as the need for post weld heat treatment, in the field, or things like that. Take a look at You Tube, Google ‘High, Wide and Heavy Load Transport,’ ‘Heavy load transport,’ or some such, to see some of what can be done.