What is the most pipe you guys have hung from a tip hose to go into a deep hole?

What size pipe???  3,4,5??

4"

We used to use a 4' hose off reducer and say maybe 30' but depending on boom size.

Then you have crane assist which I have had about 130' off tip.That was closing off an old coal mine shaft along e-470 in Denver.You can run accross cassions 100' deep but few and far between.On the bigger flex booms I would say 20' max before thinking about crane assist.

I run a 36Z and hung a 20'.

I just did 4 in the last 2 weeks.  The drill winch was busy holding the cage and there was no crane. (there should have been one)  I run a putz 40z and put 25 ft of 4 off the tip.  I did how ever reduce wait by usind a 4 ft 4 inch double ender instead of a ten and i also used my 5 to 4 reducing elbow to keep a little more weight off the tip.  I definatly wouldn't do any more than that, the new putz booms are very light duty.  Always trying to cram more stick on a smaller chasis.

5' -4"stubbie, and a 20' pipe.

Thanks for the info. I wasnt sure how much I should hang. I mostly kept my D section vertical hoping to keep the weight on a larger boom section.

worked for a company that would regularly hang 40- 50' of 5 " and it was less weight on the end, how ? because if you pump slow enough the concrete is falling never filling the pipe completey with concrete a 4" most times its gonna fill up 3" also, but if you could get some mathematical genius with the right equation I would think its better to hang thin wall 5" than it is to hang 4" I have done both and to me the 5" trimee system is the lesser of the two evils,  all this was done with older 36m and smaller pumps and tip section had to stay pointed straight down, and let me also say this was all done for my 10 years there without one single accident or boom failure, but these newer liteweight longer booms we have now I would not recommend any more than 20' off the end before you demanded assistance.I do not think what we was doing was within anyones standards and I wouldnt do it today , but it was done many a time on many a cell tower site without incidence , doesnt meen we wasnt lucky , 4" always seems the hoses have problems blew quite a few of those using 4" never blew a 5" hose, so far me the 5" thin wall is the way to go on drill caissons,

In the UK the maximum your allowed to hang is two 4”x 10ft/3metre  only if in a confined area, IE in side a wall cavity. after this you require crane assist or support and anchor line to building or scaffold.

Hi guys .

Hmmm hanging pipe or hose off the boom, every machine ive operated or seen has a hose tip length maximum of 4m , witch is a normal drop hose! ....

If you think your transfering weight by having your boom in paticular postition your probably wrong, you might not bend the boom but the pins are not made to carry the weight of extra hose/pipe, "a concrete placing boom must never be used as a crane " i think everyone has seen that writen somewere .. remember its not usually at that moment thats your boom fails, it might be a week a month or a year , but when i does dont scratch your head and wonder why , because at the end of the day the answer is clear, you know it ! u will never admit it espesially if someone is hurt or killed and it really cant be proven, but if you think about it, you do know why that boom failed if you were doing the wrong thing!

When I first started pumping. My company had me do a job pumping a big cassion. Had an older 32m with 4 4"pipe hanging off of a 5" hose. Needless to say management for the company was out there and I didn't have much of a choice. Felt rather uncomfortable lifting that into the air. So did the pump!! (didn't barely wanna lift it) Needless to say I have learned alot since then. If someone wants to do that, let em have at it.

Drew

no you dont know how do you know that caused it you dont there is many things that cause failure not just hanging hoses, bad casting,grease worms, and just normal wear and tear you figure the stress of a boom being stretched out on boom pins now you take it and a - frame is the pressure more or the same on the pins so there is all kinds of factors that cause failures trimee pipes doesnt cause them all.

 dcon do you run a 3 section boom? I've always seen & heard the turret refered to as the 'A' section and so on... I'm assuming your 'D' section is the tip section.

 If I have to boom all the way out I dont like to hang more than a single hose (12') or a single pipe with a short stub hose especially if you're pumping enough volume to keep the system full. If I'm able to keep the tip section close to vertical I feel more comfortable hanging a couple pieces.   

I was doing caissons one time crane broke down picked 90 ft 5 inch pipe. This was a 38z putz tip section was straight down.

Weve been hangin 50 off o 34m for the last 2 months doin pier holes

Amd we got another we ar forced to hang 5-4 reducer, Double ended 4" 4-3 reducer then a 30' 3" wall pipe off of our 39/47 and 52m, flat sticked alot of the time!!! I know how unsafe it is but I really cant afford to loose my job I keep complaining but it does no good. And I need a job!

Im surpised at how many ppl do it....

pudg i know what your saying , but if you did do it wouldnt it make you wonder? I know i would ..

To me this site is about sharing experiance to help others do it right and safe , you cant honestly tell me hanging pipe and hose off a boom is safe or right... 

Drew , no I cannot but I can tell you its done everyday and your really not hearing about that many boom failures doesnt make it rite but still the same its being done 

Think the biggest nasty is operators who try and drag lengths of hose around with the boom just because they are too lazy to unclip them

if your looking at a safety issue ive always read to believe that 4m is the most you can hang from the tip section. either a 4mtr 5"hose or a 3mtr 4"hose with a reducer.

There is a weight rating on the end of the boom, every manufacturer and boom size is different. That is their safe point that you can go to. Need to figure out with the weight for what you are hanging. The pipe, concrete, clamps and reducer. You should be able to go to that weight fully stretched out, but i do believe that if you were having your tip straight down, you can do more. I have also known people that would hang longer pipes (90') off the third section because it was built to hold the weight of the tip section.

Mine is allowed 400 lbs of whatever hose or pipe the way I read it.

i did see a contraption that JLS had that was the safe way to go if I recall it was just the pivoting 4th section and the trimee attached to that section I'm sure theres a picture of it on here.

"I have also known people that would hang longer pipes (90') off the third section because it was built to hold the weight of the tip section."

Yes, the 3rd was built to hold the weight of the tip section.  Remember, the pipe connected to the 90 isn't being supported by anything.  So, that 90 feet of pipe is only being held by the swivel 90 elbow. 

The elbow at the tip can only hold XX amount of weight...the boom can hold XX amount of weight...giving you the weight limit on your tip section.  By-passing the tip and hanging  pipe off the 3rd sounds like it would work...except that the swivel elbow can only hold XX amount of weight.  Hell, even by-passing the tip and 3rd sections and hanging off the 2nd should mean MORE weight right??  ...you're still only good for whatever weight the swivel can take...

Be careful out there.