its about time someone made, a 5-8in reducer for the end of the boom, so you would have at least a 8in pipe instead of a five inch, or a ten inch  you could still pump fast but less pressure, and less chance of hose wipe, and instead of hose man hugging pipe put a rope on operator

Hey, why use a hose at all? Why don't we just pour from the tip 90? :D :D :D

what you are saying makes no sense. If you are saying to put a 5-8 on the tip, that is ridiculous. If you want all 8 or 10" pipe, that is even more ridiculous. Do you know how much the boom would weigh with the extra volume of concrete. You would need to put longer outriggers on a pump. And how does any of this have to do with the title "double ended hoses". Makes absolutely no sense. Are you a mixer driver?

No matter what you are talking about, if you go up in size, you can never fill the hose and concrete spatters everywhere and who wants to push around something that big.

WHAT!!!!!

http://video.concretepumping.com/videos/852/hose-whip

pink panther

think you are missing the point,hose would not weigh that much more its no different than having a bigger hose to having two hoses, the idea is to stop hose whipping, whats wrong with the operator placing the concrete manual tells you no one is allowed to stand under boom when working so why does a hose man hugg pipe its only a suggestion don't see many on this site,

and as for spatter, i am sure they would sooner go home with, concrete on them than end up in a box bigger pipe less chance of blocking people and the way we do things have to change, you try these things and if they dont work try some thing else

It looks like somebody needs to change the tip gasket.

It's been my experience that if you use a 5-3 1/2 reducer with a 3 1/2 hose any plugging happens in the reducer. This elliminates pluging in the hose. Just a thought.

Sorry to say it so rude but that's a load of crap. You should know that there are enough plugs that go just throug the reducer but can get stuck in your hose. And besides, a reduced hose hanging in your boom gives you much more chance of a bad hose whip due to air!!! DON*T do it!!! Maybe that's even worse than a 5'' double 90.

Are you talking about using an 8" pipe for pumping slabs or walls. If you are talking about doing walls with it, good luck. It is hard enough to fit a 5" pipe inside a wall full of rebar. Why don't you explain more of what type of pour you are talking about.

As far as putting a rope on the operator on the opening post. That is a wonderful idea to strap the only guy on the jobsite that knows how to operate the equipment to the boom. So if there ever was an accident the only person able to clean out the pump is unconscience. You make absolutely no sense with this whole post. Like I said earlier, you must be a mixer driver.

if you read my post , i said put a rope on for the hose man, not the operator unless you do that as well,

i know you wont get a big hose down a wall but for big volume, a big hose would be good the speed that most drivers pump at you could still fill an 8 or 10in hose but with less chance of whipping the idea is to try and make things safer, not make personal remarks, that's why 03 wont post on here because of getting ripped to pieces

and no i am not a mixer driver

I won't be rude but 1 inch is about 2,5 cm. And thats the inside size of the hose. So your talking about a 10'' = 25 cm + 3cm = 28cm thick hose. Thas a lot lot. (8'' is already a lot) But your right about that it will be hard to get a hose whip with that. But pumping so fast that you fill it is absolutely impossible. Eighter you are quite new at this... (no offence !!) Or you are mistaking with the inch/cm thing...

if you read my post , i said put a rope on for the hose man, not the operator unless you do that as well

MMM,keep in mind everything "you" put on that hose you accept 100% liability.A case in point,the place,Greely,Colorado,the year,long ago.

A member of the hose crew had a pump supplied rope on system.The rope broke loose and man fell from second story,I believe.He was injured badly and brought suit against company.He was awarded a sizable amount.All pump companies here stopped supplying rope or anything else on system.

Another case,operator finished pour (boom pump) and moved to washout area down the street.The crew heard the screams and raced to the pump,not knowing how to stop the engine.Yes,as one can imagine the operator perrished in the hopper,leaving behind a family.All pump companies here started welding the grates down.

So the next time you operators think your smarter than a rock,call a personal injury lawyer.Stop being part of the problem,be part of the safety solution.

I run a 20 cell and I still dont believe I could fill a 8-10" hose , sorry but just dont see your theory happening, 5" single end works just fine , I actually was pouring a matt pour a week ago and decided to suck air pumping wide open ( no one was around the hose) when the air came out it may have wiggled 4 inches wanted to video it but I was in a plant and thats against the rules, your hose whippings are coming from plugs in 5 inch hoses letting loose or reduced hoses not from air pockets in 5" hoses they dont whip enough its when you reduce and compressed air is forced thru the smaller hose, but I have seen 5" hoses whip from foreign objects hanging or plugs never from air sucked while pumping, this is a myth, now you do a 4 inch hose and force air thru and the show is on.

that was real funny pink panther.

be aware of what whats going on at the hopper and you really dont have to worry about hose whip,if you do get air in the line just run it slow and it will not whip the hose.

 jj707  I totaly agree with you.

And if you would like to run a 8" hose on a boom wich has a 4 meter 5" hose as maximum without overloading,
you would have to use a 1.5 meter 8" hose.
(2.5 inch) * (2.5 inch) * 3.14 * (1 meter) = 12.661265 liter
12.661265 liter * 4 meter * 2.4 = 121.548144 kg
(4 inch) * (4 inch) * 3.14 * (1 meter) = 32.4128384 liter
32.4128384 liter * 2.4 * 1.5 = 116.686218 kg
Whereas 2.4 is the weight of the concrete, and don't mind the weird calculations, I used Google so I wouldn't have to do all the conversions.