19
votes
How thick is it reasonable for the walls of a steel gas pipeline to be?
It seems realistic to me. This is an undersea pipeline at depths of over 2 km. The pressure would be considerable at those depths (on the order of 20 MPa or 200 atmospheres). The pipe would need to be ...
- 2,631
13
votes
How thick is it reasonable for the walls of a steel gas pipeline to be?
Is such wall thickness realistic for an industrial gas pipeline?
Looking through ASME B36.10M-2004, Welded and Seamless Wrought Pipe, there are plenty of pipes that have thicknesses in that range. ...
- 3,587
9
votes
What is the correct pipe size for a 2inch pipe?
As of the 2013 edition of ASME B16.5, the scope section explains:
This Standard states values in both SI (Metric) and
U.S. Customary units. As an exception, diameter of bolts
and flange bolt ...
- 4,531
6
votes
Water pump at top floor or bottom?
Think about the pressures. With the pump above the supply line, the pressure at the input of the pump will be lower than the supply. At roughly 2 PSI per foot, you're down about 18 PSI.
Since air ...
- 11.4k
6
votes
Accepted
What is the correct pipe size for a 2inch pipe?
I would guess that the discrepancy is down to rounding fractional inch sizes to decimal inches ie 2.38 is not exactly 2 3/8"
Note that 2.375 (two and three quarter eighth inches) is 60.325mm
- 15.2k
5
votes
Accepted
Is steel air (argon) tight?
Steel is routinely used for high pressure storage of industrial argon. For practical purposes it is certainly 'gas tight' although there may be a certain amount of atomic level diffusion into the ...
- 15.2k
5
votes
Accepted
What material is used to make gas pipes?
In my admittedly limited experience working with plumbers, natural gas pipes are typically made from galvanized steel for interior work, or from black steel pipe for underground. Last-leg fittings and ...
- 4,041
5
votes
Accepted
One way plastic rubber pipe
Your idea would not be too hard to construct. The one direction tines can be installed through the side of the pipe. Any springy rod material could be used; plastic rod, spring steel, etc. Rubber ...
- 7,904
5
votes
How Can I Determine Multiple Discharges from a Pipe Network? (Knowing the Inlet Conditions)
You have 9 unknown values you are seeking (the flow at each of 9 outlets), and one that you need to find in the process (the total pressure drop) From the given information, you can assemble ...
- 81
5
votes
Accepted
How Can I Determine Multiple Discharges from a Pipe Network? (Knowing the Inlet Conditions)
The flow of current in a circuit is broadly analogous to fluid down a pipe, with the resistance of wires/resistors combining according to standard laws. If you can break your pipe network down into ...
- 7,726
5
votes
Accepted
Why is the friction factor in laminar flow independent of pipe roughness?
In laminar flow, you assume a fuild layer near the pipe wall with flow velocity = 0, and progressivly faster flowing layers towards the middle of the pipe. That's why it's called laminar. Because ...
- 4,772
5
votes
Direction of fluid flow
Heat the pipe at some point, and find the direction in which heat transfers. This will give you the direction of the flow.
Caution: Don't do this for flammable fluids. Thanks to @Carl Witthoft for ...
- 101
4
votes
What is the pressure to secure certain temperature?
Pressure adds only a to the temperature of water. Pump pressure allows water to be moved, it is not used to maintain the temperature of the fluid being pumped. To minimize thermal loss of fluid in a ...
- 21
4
votes
Why do water mains break in the winter?
Water main failures are greater in the winter months than in the spring or summer. As a water utility professional in northern Illinois we have around 120 failures each year with 20 + years of data. ...
- 41
4
votes
Accepted
Divide Flow and Maintain Pressure
Short answer:
I suspect that so long as your pump is a positive displacement pump (ex: the "vibratory pump" or "rotary vane pump" as described in this webpage about espresso pumps) and is sized to ...
- 532
4
votes
Accepted
How to determine the "complete turbulence" boundary line in a Moody diagram?
Moody (1944, Trans. ASME 66(8):671-684) gives the following equation for the onset of complete turbulence:
$$\frac{1}{\sqrt{f}} = \frac{\textit{Re}}{200}\frac{\epsilon}{D}$$
and attributes it to a ...
- 851
4
votes
Direction of fluid flow
Yes, purchase an ultrasonic flow meter.
Needs a straight length of pipe and very careful placing of the sensors.
However, if done well one can get good results, if not then the results can be ...
- 15.5k
3
votes
How thick is it reasonable for the walls of a steel gas pipeline to be?
Why would you need that much steel for a gas pipeline?
Remember that the force on the inside of a pipe is proportional to pressure*diameter. So a large pipe needs to be much thicker than a small pipe ...
- 189
3
votes
Accepted
How does a union joint with two male threads work?
Typically, most threads on pipes (in the USA at least) are male NPT and all the couplings or fittings are female NPT.
You can connect two pipes with a coupling as long as the last pipe added is free ...
- 7,904
3
votes
Accepted
Losses through holes drilled in a pipe
So, I attempted to solve a simplified problem using Bernoulli, it is an approximation though, since it doesn't account for the change in flow direction and subsequent turbulence caused after the hole. ...
- 498
3
votes
Accepted
Simple way to duct a PVC pipe through a stainless steel sheet cover
The way this would typically be achieved, is with an off-the-shelf "Tank Connector". This essentially replaces the welding operation in your first idea. Simply cut the appropriately sized hole, and ...
- 7,726
3
votes
Accepted
How to make sure a pipe does not take all of the water from a stream?
You can put a valve on your pipe to control the flow.
Or partition the stream by means of a short concrete wall which looks like an indented grout trowel upside-down . Say two opening for the stream ...
- 22.1k
3
votes
Accepted
How to design internal wall separation in the PVC tube to use it as a water tanker
Consider the use of a double-lip seal.
Figure 1. A double-lipped seal in the false base of the tube.
This can then be inserted from the top of the tube to take advantage of the tapered edge. It ...
- 10.3k
3
votes
Why is the friction factor in laminar flow independent of pipe roughness?
The explanation is due to the fundamental physics of momentum transfer. In all cases of continuum flow, including laminar, transition, and turbulent flow, the zero (no-slip) boundary condition ...
- 417
3
votes
Accepted
How do you determine flow distribution at a dividing T-Junction?
In flow problems, it's generally a good idea to work backwards in realtion to the flow: Find where each branch is ending and the pressure at this point (height, atmospheric pressure, $p_{out 1}, p_{...
- 4,772
3
votes
Direction of fluid flow
If this is a pumped system, try measuring the reaction forces when you turn the system on. For example, if you're trying to measure the direction of fluid flow in a hermetically sealed "black box&...
- 320
3
votes
Accepted
If you shut down a gas pipeline for a few months would you fill it with gas at full pressure?
The blog is wrong . It requires higher pressures and/or lower temperatures to make hydrates. Hydrates can be a problem at high pressure gas production wells; such as above 5000 psi. That high ...
- 6,112
3
votes
Accepted
Where should I restrict the flow of a pump?
I would add a by-pass valve back to the sump.
That will allow the flow to be controlled from max to min.
- 15.5k
2
votes
Water pump at top floor or bottom?
Considering this is a centrifugal water pump, it can provide very little air suction. That means if your pump is airlocked, there's not a shade of a chance it will be able to produce nearly enough ...
- 6,125
2
votes
Estimating Potential Flow through a pipe, from tanks to outlet
This link : http://www.calctool.org/CALC/eng/civil/hazen-williams_g
gives you a calculator BUT does not include any losses due to junctions, joints or bends. Losses due to all the junctions, joints, ...
- 15.5k
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