Questions tagged [pipelines]
The pipelines tag has no usage guidance.
120
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Heating circuit: Galvanized steel with press fitting vs welded steel pipes
What are the downsides for galvanized steel pipes + press fittings vs. welded steel pipes in a heating application? Diameter would be DN25/1".
Background: The customer specifies only steel, only ...
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How thick is it reasonable for the walls of a steel gas pipeline to be?
The TurkStream project site claims the gas pipeline will use pipes made from 39 millimeters of high-quality carbon manganese steel with additional plastic coatings on both sides. Yes, they claim 39 ...
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Exact procedure to mount a blanking spade near a butterfly valve
This is a follow on to my previous question about blanking spades. There's a gas pipeline with a butterfly valve mounted between to flanges. I want to work on one side (call it the inert side) and ...
- 4,791
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Device to remove condensate, without creating a hazard (EX) zone
I have gas pipeline with biogas, low pressure - approx 40mbar over atmosphere. I want to remove a small amount of condensate, inside a building, without creating an ex-zone. Small amount: I honestly ...
- 4,791
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How are blanking spades entered into gas pipelines?
I often see specifications for refurbishing works on gas pipelines calling for blanking spades, to separate the area worked on from the rest of the gas system. This is in addition to closing valves.
...
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Estimating Darcy Friction Factors for Critical Flow
The Darcy-Weisbach equation is used to calculate the frictional pressure losses in pipes transporting incompressible fluids. This equation uses a dimensionless Darcy friction factor, also known as the ...
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Heat Loss per Linear Ft
For an assignment, I was given:
Calculate the heat loss per linear ft from $2$ $in$ nominal pipe. ($2.375$ $in$ outside diameter covered with $1$ $in$ of an insulating material having an average ...
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Distribute 6 inputs to 9 outputs with pipes
I have the task to connect 6 input sources of fluid with 9 output (sinks) sources. Each input should be connected to each output. Each input should be able to distribute the fluid to only 1 output at ...
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Force required to empty a syringe
How would you go about solving the following problem. I believe Bernoulli's equation needs to be employed, but I'm not sure how.
Find the magnitude of the force that needs to be applied to a piston ...
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Why do water mains break in the winter?
It may just be my perception, but it seems like water main breaks (at least in Pittsburgh PA) are more common in the winter during the cold weather. It may just that they are more news worthy in the ...
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What is the maximum length of oil pipelines?
This is inspired by the discussion and controversy surrounding the Keystone Pipeline.
The main part of the Keystone Pipeline system is about 3,400 kilometers long, stretching across a large portion ...
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What is the purpose of these diversions in a natural gas line?
The campus where I work has a long covered walkway (~.5 mile) which has several labeled pipes running under the roof (chilled water, fuel oil, air...). All of the pipes run dead straight except for ...
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How is gas flow through (extremely long) pipelines monitored and controlled?
(This is closely linked with measuring the Mach number inside a nozzle but it is not regarding the supersonic flow)
Friction and heat transfer have effects on the Mach number of the compressible flow ...
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How to know whether the flow is supersonic in a nozzle?
For a project I had built a convergent divergent nozzle designed for Mach number = 3. In that project, I could know the flow has gone supersonic by seeing the manometer fixed between the throat and ...
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How can I calculate the stresses and limits for the physical lowering of in-service pipelines?
Sometimes underground pipelines are exposed due to vertical scour or lateral migration of streams (or other erosion). One option is to lower the (in-service) pipeline to a new depth that provides ...
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