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Questions tagged [pipelines]

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33 views

Finding Horizontal and Vertical Force on Bending Pipe

I did a Civil Engineering course some years ago and from my textbook I had a question on a bending pipe. The purpose of this question is to see if the way that I have calculated this is correct, as ...
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2answers
71 views

Find Torque and Force on Pipe with Bend

I did a Civil Engineering course some years ago and from my textbook I had a question on a pipe with a bend. Now I think I have the part of the question on force correct, but I am not sure how the ...
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1answer
51 views

Straight Pipe Thread

Is there any National Pipe Thread Straight (non-tapered, requires O-ring or compression olive) that is compatible, even loosely, with a machine thread threaded rod? I want to put a reducer on the end ...
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0answers
10 views

How is “critical service” defined, according to DIN EN 1591-4?

DIN EN 1591-4 specifies how installers for flanged connections ind piping systems "in critical service" are to be trained and certified. The only definition of critical service given in the ...
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0answers
30 views

Trying to simulate the bending of a right angled pipe in solidworks

I have created a bent right angled tube in solid works. It has a constant inner diameter of 1" and thickness of 1/8". The tube is comprised of a straight portion 1 ft in length, followed by a 90 deg ...
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1answer
28 views

Determining the headloss according to Darcy-Weisbach with pipes in parallel and series

Given the following situation: Pipe A and B have a known and identical length and diameter, and are in parallel. I'm assuming the flow trough pipes A and B are also identical, as is the roughness of ...
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0answers
39 views

Ideas on optimization of DRA and energy consumption of a pipeline

I have a 200 mile pipeline with a few pump stations in between. I am trying to find ways to optimize the electricity and DRA consumption, and was wondering if anyone has ever done something similar ...
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0answers
19 views

Finding flow rate contribution from difference in temperature

Currently I am working on a DTS(Distributed Temperature Sensor)data and PLT data and I need to figure out a relationship between temperature and fluid flow-rates in various locations (depths) of the ...
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1answer
24 views

Volumetric flow in a pipe from velocity

I think I'm missing something important here. For a fluid with a velocity $u$ in a pipe with cross section area $S$, the volumetric flow rate is equal to: $$Q_v = uS$$ If we now consider vectors, ...
2
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1answer
47 views

Connect heated copper tube in PVC tube

I have a copper tube that I'm heating (quite a lot) with a torch, I have to connect a PVC pipe in the entrance of the copper and one in the exit (so water can flow through the copper pipe). The only ...
2
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1answer
79 views

Negative head in Darcy's flow equation

This question appeared in my midterms. A pipe transports water from a storage tank A to storage tank B. Storage tank A is at an elevation of 20 m above B, the pipe length is 6.4 km. The present ...
4
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3answers
72 views

How to make sure a pipe does not take all of the water from a stream?

I am trying to design a pipe which takes water from a river and transports it to a reservoir. However, I do not want my pipe to take all of the water from stream, because that will create all sorts ...
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0answers
85 views

Determining the Steady Discharge Between Two Reservoirs

A uniform pipeline, $5km$ in length, $100mm$ in diameter and with a roughness size of $0.03mm$, conveys water between two reservoirs. The difference in water level between the reservoirs is $...
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1answer
42 views

How to create an algorithms for fitting a network of tubes into a cube? [closed]

How to create an algorithms for fitting a network of tubes with a range of diameters into a cube, with maximum volume in the tubes? Assume: 30 cm minimum square side 1 cm minimum pipe diameter 1 mm ...
1
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1answer
59 views

Simple way to duct a PVC pipe through a stainless steel sheet cover

I need to duct a PVC pipe (DN80) through a stainless steel sheet metal covering. The hole thing needs to be tight against stormwater. There's tons of products to duct pipes through thick walls, but I'...
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1answer
49 views

How to maintain a static negative pressure in a valve?

My target is to create a valve with multiple inlet capillaries. And my output is a pipe of a larger diameter. I do not want to use any electrical systems, and at the same time, I want to maintain ...
1
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1answer
49 views

Do nylon and rubber bushes usually come in sizes between steel pipe sizes?

I'm in Cambodia where I don't speak the lingo and I'm hoping to do a little DIY project. If I were to buy two different off the shelf steel tubes am I right in thinking that the most common nylon and ...
3
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0answers
65 views

Simplifying head loss across a piping network

I am tasked with designing a compressed air piping network,with and would like to determine the pressure loss across the different layers of instruments -now here is the 3D layout of the network. ...
2
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1answer
359 views

What are the differences between compressor stations, pump stations, and booster stations?

I am doing some research on impacts related to natural gas compressor stations. In some states, I've received data for compressor stations alongside other facilities in the oil and gas world. These ...
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0answers
88 views

Can Swagelok SS ferrule be reused?

At times, the Swagelok SS Ferrules gets crimped tight into the SS pipe. In those cases, can these ferrules be forcefully removed and reused? Or was this a result of faulty installation?
1
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1answer
56 views

Elevation / pipeline Elevation calculation

We do inspections using a robotic camera in the pipeline. It’s tractor type camera. (Ref. photo) While driving the camera through the pipeline it gives us the camera tilt degree output. The camera ...
2
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2answers
306 views

What is a reference that i can use to find the interpretation of a symbol in a gas line schematic?

I have a schematic for some gas lines in a wafer processing unit. One of the symbols which occurs is a circle with an x in it that has the left and right quarters filled in to form two black ...
2
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0answers
24 views

Alternative to HDPE Piping for long range sea-water + water transport [closed]

Is there an alternative for the expensive HDPE Piping for long range sea water transport?
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4answers
67 views

Software options for simulating oil flow in small diameter pipes [closed]

I'm looking for 1D software packages that can simulate flows of oil (lubricant) in pipes of a small diameter (typically between 1mm to 12mm in diameter) and have found around 10+ possible candidates, ...
1
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1answer
39 views

Intuition behind pressure losses in pipes

From standard pipe-loss equations we know that features in piping systems, such as wall surface roughness, or valves along the pipe system, cause major and minor pressure losses respectively. However, ...
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1answer
88 views

Equivalent Lengths of Pipe for Laminar Flows

I have a pipe network with laminar flow (peak output from the pump gives a Reynolds number around 1100). I have some test data for the network and the results are really odd to me; I cannot explain ...
3
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1answer
1k views

Losses through holes drilled in a pipe

I asked a previous question about pipe t-junctions with pipes of varying diameters, and it got me wondering... How are losses handled and calculated in pipes with holes drilled directly into them? ...
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0answers
357 views

Flow in a T-Junction with pipes of different diameters

I have been trying to model a complex pipe network recently and have come across something I can't find any information on. In my model, I have been assigning equivalent lengths of pipe to various ...
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1answer
43 views

What is the use of a “ by pass ” [closed]

I'd like a simple explanation of the function of by pass, here is an image of the project am working on and if it can help clarify.
6
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3answers
166 views

Is there a way to reduce leaks and infrastructure damage when turning water on and off at the scale of city?

Cape Town, South Africa is experiencing an extremely serious drought, with estimates putting April 21, 2018 as the day that the city will be forced to shut off all municipal water supplies and begin ...
7
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2answers
3k views

How Can I Determine Multiple Discharges from a Pipe Network? (Knowing the Inlet Conditions)

I have little/no experience with pipe networks and have been searching for a methodology to calculate the discharge from multiple outlets of an oil pipe network with a single inlet. As far as i can ...
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0answers
63 views

Is the term “invert level” applicable as the “floor” of a pressure pipe or the bottom of the trench?

I have always used the term "invert level" as the "floor level" of pressure and gravity pipelines alike. A long section for pressure pipe from another engineer came across my desk where his "invert ...
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2answers
109 views

Oil refinery pipeline direct to gas stations

I know major oil pipelines do exists either underground or under the seabed. However, these usually move crude/unrefined oil from refinery to refinery. Yet we don't have refined petroleum or gas ...
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2answers
745 views

Estimating Potential Flow through a pipe, from tanks to outlet

I am working on a project for an amazing hot springs project in CA. As part of this project, the county is requiring that we provide our own fire suppression water. We have 3 tanks of 40,000gal each. ...
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2answers
331 views

Darcy-Weisbach Equation

I've come across two forms of the Darcy-Weisbach Equation, and each one seems to yield a different result when I am solving for $Q$ (flow). $$h_{f}=\frac{\lambda Lv^{2}}{2gD}$$ $$h_{f}=\frac{f LQ^{...
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1answer
310 views

Does increasing the number of pipeline stages increase the throughput of the pipeline?

I am facing problem with this question. In my book it is written that throughput increases with the increase in the number of stages. But I think this is wrong. I think throughput decreases. So can ...
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0answers
2k views

Calculating discharge on the pipe diameter and the pressure?

Is it possible to сalculate discharge / flow rate on the pipe diameter and the pressure (for constant pressure)? For example: Pressure_internal = 5 bar, ...
1
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1answer
42 views

What is the pressure to secure certain temperature?

How to calculate the pressure needed for a pump to ensure a specific temperature in a pipe? For example, there is a pipe 100m long. A booster pump is needed to pump water with supply temperature 70 ...
1
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1answer
426 views

Pipe wall thickness and production tolerances

I made a calculation for a pipe that needs to handle 1 MPa pressure. I based my calculation on ASME VIII div1 My calculation says that my pipe needs to be 3&...
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0answers
53 views

Minor Losses Pipeflow Momentum vs Steady Flow

First post in the engineering forum The Problem Statement I have designed a prototype agitator tank - its a circular square duct like pipe filled with incompressible liquid (acetone/water) which ...
5
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2answers
258 views

What is the correct pipe size for a 2inch pipe?

I'm was looking into the ASME B16.5Pipe flanges and pipe fittings and it has 2 dimension tables metric and inches. What I found was rather strange for me. I was ...
1
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2answers
2k views

How can I calculate the power to drive a water pump based on discharge from two hoses?

I am trying to solve the following problem: A pump feeds two hoses, each of which is 45 m long and is fitted with a nozzle. Each nozzle has a coefficient of velocity of 0.97 and discharges a 37.5 ...
4
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2answers
156 views

Is steel air (argon) tight?

I need to build an air tight system that can hold gas (Argon Gas). I see that most pipes use steel. Is steel tight enough to hold that gas? Argon is very dense, so I think it should have no problem.
2
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2answers
8k views

What material is used to make gas pipes?

What is the most common material gas pipes made of? I read in a unreliable website it's steel, is it true? Also how good is steel at stopping or slowing down the leaking of gas? The gas I am ...
5
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2answers
86 views

One way plastic rubber pipe

I am working on a project for college, and I am stuck on one idea that I don't really know how to represent it. Basically what I want to do is something like a pipe, that if a put a kind of cylinder ...
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0answers
65 views

Operation of radial blower without compensators in gas pipeline - What problems to expect and how to mitigate?

The situation is this: At a current project, there's a pair of (parallel, redundant) radial blowers to raise the gas pressure for the downstream consumers (CHP, gas burner). All vibrating machinery ...
3
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4answers
8k views

Water pump at top floor or bottom?

Which position of the water pump in the below diagram provide maximum water output to the overhead tank? Each floor is 12 feet in height. I already have the pump (Centrifugal Regenerative Self ...
1
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0answers
200 views

What is the pressure-temperature rating for a stainless steel Class 150 nipple?

Which ASME standard defines Class 150 Nipples - material stainless steel? What is the pressure-temperature rating for such a fitting? I don't have ASME standards available but I don't believe ASME ...
4
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1answer
10k views

How does a union joint with two male threads work?

How does union joint with two male threaded ends work? Does one male end rotate 360 degrees around it axis? How is the inside of the union constructed? Can I connect two pipes with female threads ...
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0answers
42 views

How to close a segment of a buried PE pipe

For a project we need to repurpose 2 buried PE pipes, by connecting them and closing off segments. My question is about how this closing off can be done. Some details: The lines are roughly parallel, ...