What is Pipe: Definition and 1000 Discussions

A tobacco pipe, often called simply a pipe, is a device specifically made to smoke tobacco. It comprises a chamber (the bowl) for the tobacco from which a thin hollow stem (shank) emerges, ending in a mouthpiece. Pipes can range from very simple machine-made briar models to highly prized hand-made artisanal implements made by renowned pipemakers, which are often very expensive collector's items. Pipe smoking is the oldest known traditional form of tobacco smoking.

View More On Wikipedia.org
Recent contents Top users
  1. J

    Does this answer look right? (Infinitely long conductor pipe)

    Homework Statement Fig. 1 shows the cross-section of an infinitely long conducting pipe. The inner radius of the pipe is r = R1, and the outer radius is r = R2. Suppose the inner surface has a constant voltage V = Vc > 0, and the outer surface has a constant voltage V = 0. The voltage...
  2. S

    How Does Magnet Quantity Affect Descent Speed in a Copper Pipe?

    Homework Statement So i had to make a thesis and hypothesis for this lab where i have magnets in bundles all of the same mass some with more magnets in them than others. I have to do a lab and an analysis of how it relates to forces and energy and work Homework Equations Does the...
  3. V

    Easiest way for two men to lift a pipe

    If rope is wrapped around a pipe and two men are lifting it up why is it easier to lift when the rope is loose around the pipe (A) and harder when the rope is tied tightly to the pipe in a knot at both ends (B) ? I presumed this was because on A the weight is less concentrated?
  4. C

    Calculate Litres of Water Through Pipe in 1 Hour

    Homework Statement If water flows through a pipe at 0.8m/s , how many litres will flow through the pipe in 1 hour? I think I may be greatly overthinking this question, I keep thinking I need to take into the account of the trench length which is 500m, and the pipe size which is 0.5m...
  5. A

    Air Flow in a 10m. pipe - generating electricity ?

    I have this idea about creating a 10 meter plastic/metal pipe that would go from a house roof to the ground and having a "U' shape close to the ground so that both holes are directed at the sky. Does anyone have a clue if the difference in atmospheirc pressure between both holes (10 meters...
  6. Z

    Difference in flowrates depending on where the pipe splits.

    Fluid Dynamics Question: I have a 1.5" pipe that has water pumped through it. The pipe is immediately split by a manifold into 5 separate 0.75" pipes after exiting the pump. Each 0.75" pipe runs to an outlet at varying lengths from the manifold (15", 37", 52", 89", and 126"). I want to know...
  7. L

    Pressure loss rate as related to pipe leak volume?

    Greetings! I locate buried water pipe leaks (simplyleakdetection.biz) however attempting to approach more mathematically. I often isolate the leaking pipe and insert air pressure at one end. The leak is represented by the pressure drop rate as viewed on the air gauge when isolated from the...
  8. B

    Split Pipe Pressure: Is P1=P2=P3?

    Trying to determine what happens when a pipe of splits off into two pipes which all have the same diameter. If the flow in the two pipes are the same and everyting else is the same. Then is the pressure in pipe 1 equal to P2 + P3 or is it P1=P2=P3. Searched around and haven't been able to...
  9. S

    Calculate open pipe length given resonance.

    Homework Statement What length of open pipe is needed to give resonance to a 384 Hz sound? Assume the speed of sound to 343 m/s. Homework Equations f=\frac{nv}{2l} The Attempt at a Solution I am lost as to how to even start this problem.
  10. E

    Flow in a pipe with a tank on its top, and a nozzle on its bottom

    I have a tank filled with water on the top of a pipe (height of water = h) there's a hole in the bottom of the tank, so that when the hole is suddenly opened, water will flow in the pipe of length 20 meters at the bottom of the pipe, there's a nozzle (I don't know how to choose the right...
  11. M

    How quickly does hot air cool in a pipe?

    Dear Members, I am trying to calculate how quickly hot air cools in a stainless steel pipe. The details are as follows: • a stainless steel pipe conducts hot air with temperature at the top end of the pipe of 85oC (185F). • the pipe is 10m long and passes through 5m of ambient air with...
  12. A

    Mechanical Strength of Black Iron Pipe

    If you were to mate a 1 ½” black iron pipe to a 1 ¼” black iron pipe using a 1 ½” coupling and a bushing reducer, how much bending torque would be needed before one of the parts or connections failed? That is, if you held the 1 ½” black iron pipe in a fixed position and the applied a force to...
  13. B

    Pressure drop along a water pipe

    Along a horizontal pipe I am getting a pressure drop of roughly 10-20 kPa every 20 metres in a 6.5" (OD) water pipe. This seems much to high and I am thinking the pipe may be stuffed and thus there is to much friction which is reducing the pressure of the water. Just wanted to get some other...
  14. T

    Determining Harmonic Frequency of 1m Pipe

    Homework Statement A pipe has a length of 1 m. Determine the frequency of the first harmonic if the pipe is open at each end. The velocity of sound in air is 343 m/s. Answer in units of Hz Homework Equations f = v/2L The Attempt at a Solution I just did another problem like...
  15. P

    Solving Water Flow in a Taper Pipe Problem

    Homework Statement Water entering a house flows with a speed of 0.228 m/s through a pipe of 1.08 cm inside radius. What is the speed of the water at a point where the pipe tapers to a radius of 2.39 mm?Homework Equations Continuity equation: A1V1 = A2V2 Bernoulli's Principle: P1 + .5pv1^2 +...
  16. M

    Frequency of sound in a pipe question

    Homework Statement Shown in the picture attachment. The Attempt at a Solution Hello! with this question I am just completely lost. I haven't the slightest clue how to get started. Anybody care to explain why the answer is D? (I've looked at the markscheme..)
  17. C

    Air pressure and velocity in a pipe

    This is NOT homework. The fan is a Crary Fan and the hose is Oregon PU used to distribute particles. I have tried a number of 'online' calculation sites but they return either conflicting results or 'infinite' values! Dear All I am trying to determine / estimate the expected air...
  18. L

    Cutting metal pipe to make different pitches

    Hi, we are trying to make different pitches by cutting metal pipes at different frequincies to produce different pitches. We don't know how to determine the length at which we should cut the pipes. We want to play notes E, D, C, G to play mary had a little lamb. the outer diameter of the pipe is...
  19. B

    How can I increase water pressure in a pipeline?

    Hey, I was wondering of a way to increase water pressure in a pipeline when I think that to much water is being taken from the pipe. Thanks
  20. R

    Conservation of energy of ball in a half pipe

    A ball is released on the inside surface of a half-pipe. The left side of the pipe is rough, so that the ball rolls there without slipping. The right side of the pipe is coated with frictionless ice. If the ball is released from a height h on the left side, how high will it go on the right side...
  21. M

    Measuring water pressure differential in a pvc pipe

    I'm having problems with our pressure measurements on a pretty basic PVC water flow system. I drew up the general design in paint and attached it so you can have a visual of what I'm talking about. The second attachment is a picture of the actual pipe design. We're controlling the flow rate...
  22. C

    What increases when water flows down in a pipe: pressure, speed or both?

    Hello! I am working on a project with a classmate. We have a bucket which represents the water supply and an extensible hose. The bucket is hanged with a rope somewhere high. Here's how it works: the water from the bucket goes down the hose, spins a fan and then gets out of this system. We are...
  23. J

    Which Surface Roughness value to use for pipe flow friction factor

    I am trying to predict pressure drop in a pipeline with a range of different materials. I have used a surface profilometer to measure the surface roughness of the different materials and I have values for various surface roughness variables - Ra Rz Rmax Rq Rm S Sm R3z Wt and a range of other...
  24. D

    Need help working out flow rate of gas from a compressor down a pipe please.

    Hi there, after hours of frustration I've given in and come for help! I hope this isn't too long of a question, I really would appreciate any help I can get. :) I'm trying to work out the flow rate of gas down a pipe. My setup is simply an air compressor with a pipe coming out of it, with a...
  25. A

    Horizontal Force in Pipe Bending

    Homework Statement Water enters a pipe and goes through a bend with a contraction from 40mm to 25mm then into the atmosphere. What is the horizontal force required to hold the pipe in place? Homework Equations I have either been given the following or have calculated them using the standard...
  26. K

    Will an increasingly narrow pipe create pressure?

    If there is a leveled pipe that gets increasingly narrow, the fluid in it will gain speed/momentum, right? Can you use that extra speed to lift the water (create pressure)? What equations would describe this?
  27. E

    Optimizing Resonance Length for Closed-End Pipe with a Tuning Fork

    Homework Statement A tube is closed at one end by a piston which is slowly withdrawn as a tuning fork of frequency 512 Hz is sounded over it. What is the shortest length of pipe which will resonate with the fork? (Speed of sound is 340m/s) Homework Equations L=1/4λ f=v/(4L) The...
  28. G

    What is the velocity of air through a 6mm pipe at 3 bar pressure?

    Can someone help me here i need to find the velocity through straight pipe with length 0.11meter and diameter 6mm and air flows through the pipe at a pressure of 3bar. Now i want to find the velocity of air through the outlet in m/s?
  29. S

    Can One Pressure Sensor Accurately Measure Flow Rate in a Pipe System?

    Hello, I am stuck on a pipe flow measurement problem and I would love if some excellent minds would help me out. I have a robot that sprays paint, and there is a motor pump providing the paint to it. I need to be able to measure the flow rate (velocity) of the paint going through the nozzle...
  30. V

    Flow Rate Calculation Help - Solve Pipe Flow Problem Now!

    I need help! I was given the pressure and flow rate needed through a manifold and I need to find out if this is producing the require flow rate based on the inlet/outlet diameter and total length. I have been out of school for years and need help on this! thanks
  31. M

    Investigating Orifice Problem: Pipe Head Differences & Theoretical Head

    Orifice problem I've been given a list of quantities Pipe before orifice head = 255mm Diameter = 31.75mm Pipe after orifice head = 230mm Diameter= 20mm Time for 10litres to fill in collection tank 67.09seconds Assuming g= 9.81 and density = 1000 from the experiment difference in...
  32. A

    Heat Convection through a Vertical Pipe

    Hello everyone, I am trying to model the flow of steam through a vertical cylinder. Ultimately I would like to find the surface temperature as a function of the length of the pipe. I am assuming the steam cools as it moves upward along the length of the pipe and it is a steady-state process...
  33. S

    Navier-Stokes equations for unique flow through a rectangular diverging pipe

    I am currently trying to provide a mathematical model that describes the flow through a diverging square pipe. I am trying to simplyfy the navier stokes equations by usings assumptions but am unsure if my current progress is correct. The problem is as follows: Fluid enters a section of a...
  34. S

    Potential difference of a conducting pipe

    Homework Statement A conducting cylindrical pipe has an inner radius Ra and an outer radius Rb. a charge q is released inside it. Assume the length of a cylinder L>>Rb. Find the potential difference between the axis of the cylinder and outer surface. Homework Equations Vb-Va=-∫E*dl...
  35. Peeter

    Justifying steps in the Navier-Stokes calculation for simple circular pipe flow.

    Homework Statement In [1], problem 2.3 (ii), we are asked to show that for a pipe with circular cross section r = a and constant pressure gradient P = -dp/dz one has u_z = \frac{P}{4 \mu}\left( a^2 - r^2 \right) u_r = 0 u_\theta = 0 References: [1] D.J. Acheson. <em>Elementary fluid...
  36. Y

    Formula for the Length of the pipe.

    Homework Statement The second overtune for a pipe, open at both ends is 2000 Hz, the speed of the sound is 343 m/s. What is the length of the pipe?Homework Equations • λ = v/f The Attempt at a Solution λ = v/f = (340 m/s)/(2000 Hz) = 0.17 m don't know if this is correct. Thanks in advanced.
  37. D

    Water Skin Effect in Plastic Pipe

    I need to Calculate the Skin Effect of water in a tube of X Diameter or Surface Area... The length of the Flow in the pipe would be 200 mm. I know that is short but it matters in this instance. The pressure of the water would be around 15 bar. I will post the flow rate through the pipe as soon...
  38. B

    Steam generator on the exhaust pipe of the car ( cogeneration )

    I'm trying to do the concept of a turbosteamer that the bmw is workking on but I'm facing few problems : the flow rate of water will be 9 ml/s and of pressure 6 bars . based on htri xchanger program , the best design of my shell and tube heat xchanger will be of 22 cm diameter and 6.4 mm tube...
  39. K

    Flow From a Tank through a Pipe

    Im looking to create a program which models a tabletop water tunnel. One part of the system involves flow out of a tank through a pipe. So far I have used the assumption that the pressure in the pipe is the same as atmospheric but I feel this is wrong, and therefore my use of SQRT(2*g*height...
  40. J

    Pipe Stress Analysis: Career Advice for B.Tech Mechanical Engineers

    hello sir, I have completed my b.tech in mechanical engineering, and am looking forward to start my career in pipe stress analysis and piping design. I would be happy to receive your valuable suggestions regarding the industry, job opportunities in and abroad. thankyou, jaswanth
  41. K

    How to determine resonance of an open or closed pipe?

    Homework Statement A pipe resonates at successive frequencies of 540 Hz, 450 Hz, and 350Hz. Is this an open or a closed pipe? Homework Equations L = (nλ)/2 or L = ((2n-1)/4)λ v = fλThe Attempt at a Solution The difference between the first two frequencies (540 & 450) is 90Hz, and the...
  42. S

    Angular frequency of mercury in U pipe

    Homework Statement A mercury is filled to a U-pipe so that the total length of the mercury is h (no figure given on the question). If the mercury column of one leg of the pipe is pushed then released, the mercury will oscillate with small amplitude. The angular frequency is a...
  43. F

    Calculating Mass Flow Rate of a Fluid in a Pipe

    Hi, how do i work this one out? The mass flow rate of a fluid flowing through a section of pipe with a diameter of 38mm at a flow velocity of 5ms-1 with a specific volume of 0.00109 m3/kg is? Thanks,
  44. J

    Pipe Pressure from discharge in Tank

    The diagram attached is a picture of the problem I have. I have a 10ft tall cylindrical tank with 20ft of pipe directly under it. The tank at full capacity can hold 100 gallons of water or 10 gallons per ft. I want to calculate the pressure of the water right before it leaves the pipe 20ft...
  45. O

    To find out mode of vibration of air in a resonating pipe

    Homework Statement A cyclindrical pipe of length 29.5 cm closed at one end resonates with a tuning fork of frequency 864 Hz. Then mode of vibration of air in the pipe is(Velocity of sound in air=340m/s): The attempt at a solution V=Velocity, n=Frequency If l1 is the first resonating...
  46. S

    Solve Water Pipe Problem: Simple Picture Problem w/Friend

    simple picture problem. looking for assistance in the explanation of it all. edit: discussion with a friend,problem is inspired by a scene in a tv show.
  47. P

    How can the velocity at points of change in pipe systems be determined?

    For minor losses, I read that the pressure drop is equal to the dynamic pressure * loss coefficient. However, in calculating dynamic pressure, it uses a single velocity. How do you determine this velocity when it will vary at the point of change in pipe diameter or direction? I have read...
  48. C

    Lets say I have a pipe and then another pipe inside a larger pipe.

    Lets say I have a pipe and then another pipe inside a larger pipe. On the inside pipe I have an AC current I(t) and on the outer pipe I have to opposite AC current -I(t). So that when I am outside both pipes and I make my Amperian loop, the current enclosed is always zero. Now my question is...
  49. U

    Natural Gas Pipe & Electric Field - Explained

    Metal pipe and electric field Hello, Consider a metal pipe in which a natural gas and oxygen is flowing. One end of pipe is connected with high potential electric wire from grid station and other end is earthed. Whether explosion would result from it? please explain this to me. Thanks
  50. D

    Calculate pressure loss due to bends in a pipe?

    how we doing i found the following information regarding finding the pressure drop in a pipe due to 90° bends. i was wondering could this be adapted for say a bend of 60° or 45°. what would be needed to change to the below information to allow this to happen?? thanking ou in advance. this would...
Back
Top