Hydraulic Pipe Pdf

[Janne Desir]

Ifyou are looking for a replacement hose clamp or a new pipe clamp for your hydraulic applications, the clamp shown in the image below is a great choice. The clamp is made from high-quality materials that are designed to provide long-lasting durability.

One of my favorite parts of civil engineering is performing hydraulics & hydrology (H&H), which involves a lot of math. In 2010 I wrote a blog post on my old blog "Tony's Civil3D World" which caught a lot of attention by engineers, designers, and even Autodesk. This blog post was about creating a hydraulic label for concrete storm pipes under full flow conditions. If you are not from Texas, most cities in Texas require you to show the hydraulic pipe data in the storm profiles. The data displayed the pipe capacity, pipe velocity, pipe friction slope, depth of flow, and flowrate or Q100. Back then in 2010 there were no tools or feature within Civil 3D that could perform this analysis other than using SSA or Hydroflow Express extension tools, and other 3rd party software. Most engineers, would perform this task with their own custom hydraulic spreadsheet or using software such as FlowMaster and CulvertMaster also.

So one night, I decided to tackle this issue and stayed up all night to try to figure out how to automate this process. Most engineers and designers right now are using mtext or a basic pipe label to add the hydraulic data. This manually typing in your hydraulic data for each pipe segment can be a tedious task, which most don't enjoy. For those engineers that perform hydraulics, knows that Civil 3D lacks the hydraulic engineering formulas to perform this task within the pipe labels properties. So I basically had to break down the Mannings Equation to its simplest math equations with expressions. Below are 9 simples steps on how to create you full flow hydraulic pipe label.

Then the final step, create a pipe label style, and in the Text Component Editor, Properties Tab, all the expression that you created are now available to be used. To make all the expression work, you just need to add the stormwater drainage flowrate within the pipe properties of each pipe.

Please note, since I released this post in 2010, other engineers have create a more condensed down version of what I created to perform the same task. If I remember right, a 2.0 version of this was later introduce in the Mastering Civil 3D book in 2012 or 2013 release. Second, this pipe label was created for pipes created from upstream to downstream. Hopefully this will give you great ideas on how to take advantage of expression in Civil 3D. Maybe you can create a partial flow pipe data label style, which is more challenging but it can be down. Finally but not least, if you don't know, you can do pipe hydraulics with the new Analyze Gravity Network tool within Civil 3D. Thank you for your time.

Covers cold worked and annealed electric resistance welded single wall low carbon steel pressure tubing intended for use as hydraulic lines and in other applications requiring tubing of a quality suitable for flaring and bending.

Wheeler-Rex offers a full line-up of pipe tools for the construction, excavation and plumbing trades. Professionals are able to choose from a wide range of Wheeler-Rex pipe tools including pipe cutters, threading and grooving tools, pumps, vises, shut-off tools, drilling and tapping tools, wrenches and much more. You work hard. You deserve the hardest working pipe tools. Period.

Just like hand-operated pipe cutters, hydraulic pipe cutters use a chain wrapped around a pipe to cut it in just seconds. The pipe is squeezed by the cutter wheels on the chain which causes the pipe to pop apart. Remotely operated hydraulic pumps provide the required power to quickly and cleanly snap any pipe project you face. All that is needed is a 2" to 3" minimum clearance to wrap cutter chain around pipe. Wheeler-Rex hydraulic chain pipe cutters come complete with pump, hose and case.

NOTE: Hydraulic cutter chain parts (individual pins, links and wheels) are only available with factory installation. Hydraulic cutter chain extensions are only available through authorized service stations unless installed by the factory.

Q. Sir,

We need to pickle pipes for hydraulic line as fine particles of rust or oxide may damage our costly pump. We have a pipe which is 18 meters long and 12" in diameter and process we adopt is as follows.

First we pass the soda to remove oil etc, then water, then acid, then water, then nitrogen and at last we apply hydraulic. Even after doing that pipe is becoming rusty. There is time difference of 15-20 between each pass as we have to change the setup.

For small pipes we are simply dipping them in acid tank and then in water tank and then applying hydraulic oil. Neither cleaning is perfect nor further rusting is prevented. Someone has suggested applying rust preventing oil after pickling. I need to know if RP oil is safe to use in hydraulic line. Somebody please answer my all 3 queries.

Regards,

A. You need to tell us your exact process, from the information you have given no-one could make any reasonable suggestion.

What is the material of the hydraulic pipes? It may be simply that a change of material will solve your problem.

What is the exact formulation of the pickle you are using, how long are you leaving it in contact with the steel? If your process is not robust then you may be leaving the material open to corrosion.

Finally I would not even consider a rust preventative oil as this will contaminate your hydraulic oil. You should consider a hydraulic oil with corrosion inhibitors as part of the make-up of the oil.

A. Atul,

Try adding Sodium Nitrite (0.5%) in your final rinse. This will passivate the metal and prevent flash rusting. You can increase the concentration if necessary but I would not go over 1.0%. Also, use demineralized water for rinsing as the chlorides in city water will only contribute to corrosion. Hope that helps.

A. Atul,

Can you tell us what the material is that the pipes are made of? You do not actually passivate the steel with any of the steps described (assuming that you are using a corrosion resisting steel).

Adding a corrosion inhibitor to the hydraulic oil will help. You need to talk to your hydraulic oil supplier for help with this.

A. Atul,

Your problem has little if anything to do with your hydraulic oil. I assume the pipe is carbon steel and I assume it is installed. If you are going to run the pickling process again, I recommend the following...

Degrease with 2-5% sodium hydroxide for 60 minutes at 140 F (or best attainable temp.), then rinse with hot soft water until effluent pH measures 7.0 or less. Then configure the system for recirculation and add enough citric acid to achieve a 10% (w/w) solution and circulate at 120-140 F for 60 minutes. Rinse (once through, do not recirculate) with hot soft water and 1% sodium nitrite for 30 minutes. Drain the pipe and blow dry with either nitrogen or clean dry air (-40 F dew point) until the effluent pressure dew point measures -20 F or lower. I would install an inlet valve manifold that will allow you to switch between chemicals with no delay. It is difficult to address all the issues you may encounter when you undertake this process but that is the basic outline.

You will need a very large pump to achieve the velocities necessary. I would call a firm near you that specialized in this type of work and they shouldn't have any trouble turning over a clean dry pipe to you without any hydraulic oil being used. Purge with nitrogen and cap if you aren't going to put it into service right away. Good luck.

Q. Dear sir

Please send me the exact process with chemicals name for pickling of underground 120 meter length and diameter 63 mm, ms pipe line, please send me step by step process and how to neutralise used chemicals.

Regards,

A. Hi Anil. There's no harm in asking, but I think it's unrealistic to expect what you ask for. Salman's, and Joseph's, and Bart's detailed info was already far more explicit than I would have expected :-)

But it's dangerous to attempt such operations with no prior hands-on training. Please retain a company offering on-site pickling and passivation services (there are a lot of them). After you've watched them once, you'll be able decide if you have enough knowledge & experience to undertake it yourself next time :-)Good Luck, and Regards,

Q. Sir,

We need to pickle pipes for hydraulic line of carbon steel as fine particles of rust or oxide may damage our costly pump. We have a pipe which is 270 meters long and 1.5" in diameter. Please give me the process how can I pickle the pipe.

A. Hi Sukesh. Anil received no answers in 2 years now beyond the great info offered by Salman, Joseph, and Bart. If you are also speaking of pipe that is in situ, I don't think you will either. Please retain a company offering on-site pickling and passivation services. Maybe you can work with them and learn how to do it yourself next time. Speaking personally, although I have many decades of general metal finishing experience I wouldn't even dream of undertaking such a project myself since I have no specific experience with in situ pickling :-(But good luck,

A. Sukesh,

We need to clarify a couple of things. Are these pipes carbon steel or stainless steel?

If it's carbon steel, you can "pickle" it with a citric acid solution, which ought to strip off some material and give you a fresh surface. Since the pipe will still be carbon steel, though, it doesn't really sound like a permanent solution -- you may want to insert a filter in-line ahead of the pump instead.

If it's stainless steel, you're not really after pickling. Pickling is to improve the appearance by removing scale, etc. You want to passivate, the removal of surface iron to promote corrosion resistance. This can also be done with citric acid . Though again, if you have had a problem with your pipe developing rust particles, you are presumably subjecting it to fairly corrosive conditions and you may want to insert that filter to guard against future rust particles that may develop.

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