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Thank you, ... ha ha Sunny Lancashire is a contradiction in terms. I have learned a lot, I have now had two other clients come back and never had ends off, but they are very interested in a 'breakaway' type fitting, just for safety. They also said the best place would be just before the...

Hi Miningman - Littleinch, My third party that visited the site is very experienced and worked on three continents that covers every aspect of this type of concreting. He said lots of blockages were accruing (5 out of 6 attempts). At the bottom of the CFA (Drill-bit) there is an egress hole for...

Thank you, ... Happy new year. I am keeping all these ways of explaining as it is great for any future problems, fortunately we do not get very many as we Hydro-test assemblies before they go out, with the data-log gauge and iphone photo that gives time date location that corresponds with the...

Certainly happy new year, and I need shouting down by my betters at any time, if I stop listening I stop learning. I also have to learn how to articulate better to explain what is happening. I did think my drawing was wrong, but could not prove where the other energy was coming from. You are...

Thank you Mining man, that is what I needed, to be told bluntly. I am being told that this is a fault of the hose or fittings(both)yet not one other client has had a failure like these. I was told the concrete was a HIGH SLUMP CFA mix. I can understand the ends being 'knocked' off from...

Hello all, Happy new year. please see attachment, it is a little blurred as changed from a PDF, I will also try attach the pdf. I know Littleinch you will shout me down, but I have drawn this up a different way as I am struggling with the amount of energy in the line. I am going to build a...

Thank you dhengr, Merry xmas. These jobs have been done with this type of equipment for over 25 years, I have been making them since 1994 ish and the 10ft/3mtr steel pipes. They do not use the steel pipes much on piling rig sites as they cannot flush/clean the line every time they reposition. we...

Hello Littleinch - Miningman, My reply to Miningman was approx 8:00 and 9:00 am on the 28th with the full spec of the pump and a reply from a third party that visited the site and witnessed a lot of blockages. Littleinch you must have seen part of the reply as you...

There is something wrong with this thread, I made a big reply to Miningman with attachments. the attachments where the details company specs of the concrete pump. and pictures. I can remember most but I will need to post again. Can I ask please did either of you receive a post that had "Occam's...

PLEASE STOP THIS POST ... There is a reply missing I made to Miningman with details of the pump and a proposed question to Little inch. This is a large amount of missing information. I will try go back to my post to Miningman as it was extensive. thank you

Thank you Miningman, Happy Christmas. I will blank out the names/ companies involved and download what I have been sent. I also think it is operator error, but I still struggle to explain the ends failing with the tests I have done. There is only one source of power, and 65/68 bar is not a big...

Hello LittleInch, happy Christmas. Thank you, Yes I am a designer of hose ends, and a lot of years at it. You are correct these hoses are NOT designed for 'sustained' pressure they are designed for pulse pressure (material handling)the tube (inside liner) is natural rubber, this is to resist...

Hello Mining man, Thanks for the input. There are quite a few things going on here and your point about steel lines are correct, we have also done thousands of mtr of them. I have been crimping hoses since 1993 and now can crimp up to 24" all my calc's are to same formula just the change of...

Thank you for replying, I have video of 10.2 ton on a dry end tensile, this was max length of stroke on the test rig 328mm. I have also had a test piece under pressure of 100 bar for 7 days and nights, then increased to force the end off. this a complicated test as the previous 7 days took all...

HELLO, WE have supplied a large amount of 5" concrete pumping hose (MWP 100 bar - TBP 200 bar. It has been fitted to a stationary concrete pump that pumps concrete over varying distances to a Piling rig up the mast and down a flight Auger (CFA Auger. This is a VERY HIGH SAFETY issue. Within 6...

Thank you both, the calcs on the weight are higher in the thread. as has been stated a hose full is better than a dry pull. WE have burst many hoses on tests both dry and wet and burst by pressure, end tensile is normally quite close to the equevilent to tensile at burst in the hose we use...

Thank you Littleinch, I have now got this, the axial load is not a problem and not that much to us, we are used to bigger loads. the internal pressure equates to far more load than the static load. I can tell my client the hose is capable of doing this job. Weight and pressure at the surface we...

Thank you Little inch, I think I am getting there. I do not wish to offer this hose for the pressure test unless it is safe to do so. They will be putting pressure in at the surface of 70 bar, within the maximum working pressure of the hose. I am just struggling with the concept that down at the...

Hi Littleinch, Thank you, I ask the question to get unbiased reply, I think if it is a steel pipe going down to the seabed, I agree 70 bar, but with rubber hose i cannot see the theory that you put 10 bar in at the surface it equates to 80 bar at seabed. I think the hose would expand and stretch...

Hello, My client wishes to Hydro pressure test a subsea pipeline at 700 mtr deep, he wants to connect a rubber flexible riser (flooded) to the pipeline. he wants to test at 70 bar. the rubber hose is rated at 85 bar max W.P. with 2:1 safety what pressure needs to be injected at the surface to...