Questions tagged [piping]
64 questions
32
votes
3 answers
How fast does solid waste fall in vertical drain pipes?
Some building are really tall, if you flush the toilet and the contents go into a pipe and straight down, there could be a lot of energy, potentially enough to cause harm to the sewer pipe at the end of the fall.
I know that in my home, the pipe…
James Jenkins
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9
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3 answers
How to seal a pressure vessel
I'm trying to construct a stainless steel high pressure containment vessel (pressure reactor) (2000 psi or so). Yes I realize that this is a don't try this at home type of thing, and I plan to put some lexan in front of it before I do any testing.…
user379468
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7
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3 answers
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 of a 20ml syringe with 1cm diameter tube to drain…
thelastpanda
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6
votes
2 answers
Why prefer any other pipes over plastic pipes for drainage and culverts?
Plastic pipes look superior - no corrosion, lightweight, easy to install, a bit flexible. Yet there're lots of cases when culverts and drainage pipes are made of steel (corrosive) and reinforced concrete (very heavy).
What can other pipe materials…
sharptooth
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6
votes
2 answers
Pipe seized to inaccessible coupling - how to attach a new pipe?
A friend of mine that doesn't use the internet much runs a commercial laundry. They use an old 'Manlove Tullis' laundry calendar (c. 1980) that looks like this:
(click to enlarge photos)
Essentially, it is a machine with 3 rollers (2 visible in…
Danny Beckett
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6
votes
1 answer
Why prefer plain pipes over corrugated pipes for storm sewage and culverts?
Recently I observed installing new storm sewage along a city street. Pipes have plain surface (not corrugated) and are made of some plastic looking like HDPE (polyethylene) and their diameter is around 0,5 meters and the walls are around 40…
sharptooth
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6
votes
2 answers
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 water rationing, except to essential services such…
Jonathan Rayner
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5
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2 answers
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 looking at a 2 inch welding neck flange, and the hub diameter must match the pipe…
Mech_Engineer
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4
votes
1 answer
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 using a union joint and assemble/disassemble it…
Sysrq147
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4
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2 answers
What are these bent shapes on this elbow in a compressor suction pipe?
See here are the shapes which are made on the suction head of compressor,
What are these, and why are they on the suction head pipe?
Alex Goedert
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4
votes
1 answer
How can I fit a DN16 flange to a DN10 flanged pipe?
One of the valves on my 3 bar line just failed. Without it, our production has ground to a stop and we can't operate until we get a replacement (which we have already ordered). In order to make a deadline, I am trying to find a way to use a…
jmac
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4
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1 answer
How to bend iron pipe into a spiral guide rail for stair lifters
I need to bend one circular iron pipe with 4 cm diameter and 2 mm thickness
as a guide rail for an electric stair lifter similar to this picture (the spiral bending part of stair):
How could I bend the metal pipe as a continuous rail guide for the…
ss3_azmon.fulba
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4
votes
1 answer
How to deal with thermal expansion in a city wide heating system?
How to deal with thermal expansion in a city wide heating system?
Background:
As part of the program to combat pollution in and around Beijing, my adopted city of Zhuozhou (population, over half million, about 90 minutes Southwest of central…
Astor Florida
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3
votes
4 answers
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 Priming 1HP Peripheral Type, Self Priming - 180sec At…
user343272
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3
votes
1 answer
Service Life of a Flashback Arrestor
First of all, I would like to know about the service life of a flashback arrestor. In my laboratory, I got three flashback arrestors {WITTgas RF53N(1/4”NPT-F), Brass} from the ex-students who used those items in 2012 and already finished their…
Shubhra Kanti Das
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