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.

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  1. R

    Forces acting on pipe submerged in drying cement

    I need to analyse what's going on when a hexagon pipe is submerged in drying cement. The pipe is hollow with a thickness and is hexagon shape, where the hexagon is pointing up. It is submerged in standard cement, where the top point of the hexagon is about 100mm from the suface. I...
  2. J

    How High Do Colliding Masses Reach in a Frictionless Bowl?

    Homework Statement note the picture A small mass m1 slides in a completely frictionless spherical bowl. m1 starts at rest at height h = ½ R above the bottom of the bowl. When it reaches the bottom of the bowl it strikes a mass m2, where m2 = 3m1, in a completely elastic collision...
  3. T

    Air flow changes in a pipe with the change in gas temp?

    nuclear reactor question air and non condensible gasses being removed from the condenser and processed through a treatment skid through a pipe. steady state value flow rate at 77 deg f is 30 scfm fixed the refer vault and now the temp is 15 deg for the gas. what will be the flow rate...
  4. Y

    Skateboarder Needs Speed for 3m Quarter Pipe

    A 55kg skateboarder wants to make it to the upper edge of a quarter pipe with a radius 3.0 m. What speed do they need at the the bottom? A.) 7.7 m/s B.) 9.1 m/s C.) 5.4 m/s If you could help me out with the correct formula to use, that would help!
  5. K

    Find the speed of flow in the second pipe of an ideal fluid

    Homework Statement An ideal fluid with the density of 0.85 x 103 flows at 7.0 m/s through a level pipe with a radius of 0.50 cm. The pressure in the fluid is 1.4 x 105 N/m3. This pipe connects to a second level pipe with radius of 1.5 cm. Find the speed of flow in the second pipe...
  6. V

    Calculating Flow Rate: Oil in a Pipe

    Homework Statement Oil flowing through a pipe, measured to be 135kPa 15m from the end and 88kPa discharging from the end. The diameter of the pipe is 1.5cm, the density of the oil is 876kg/m^3, and the dynamic viscosity is 0.24kg/m*s. Find flow rate for: a) horizontal b) inclined 8...
  7. H

    Solve Physics Problem: Finding Water Pipe Direction Without Cutting

    Here is a problem from a physics contest of two years ago. I've translated it from Persian but it might have some problems because of my lack of good English. Problem: Assume a water pipe is in the middle room and the water is going through it. How can we find out the direction of water without...
  8. L

    Calculating Heat Transfer Rate and Length of Pipe

    Homework Statement Saturated liquid H2O @ 500 kPa flows in a metal pipe, 5 cm inner diameter and k=40 W/m K, with wall thickness 3 mm @ a rate of 2 kg/s. The pipe is exposed to ambient gas @ 500 degrees C with h=100 W / squared K. The water is being boiled to come out as saturated vapor @...
  9. B

    Heat loss of a steel steam pipe

    I have a heat transfer question, I work in a plant and am doing a re-insulation project. If an unexposed steel steam pipe (k=47) of diameter 10 inches, maintains an internal temperature of 460F and is exposed to ambient air (70F) flowing at 5 mph across the pipe. Determine the heat loss per unit...
  10. C

    Transient solution for a semi-infinate solid from a pipe

    Does anyone have a solution for the heat transfer from a pipe into a solid. I am looking for the temperature in the solid based on radius and time and also the heat transfer based on time. The temperature in the pipe (surface of the solid) is constant. The solid has a constant lower temperature...
  11. K

    Find Outlet Temp of Cold Stream of Counterflow in Double Pipe Heat Exchanger

    Given the mass flow, Cp, temp of the inlet streams of both hot and cold streams. As well as being given the inner pipe diametre of the double pipe heat exchanger. Also knowing the setting is at counterflow and that the overall heat transfer coefficient and that the temp difference between the...
  12. W

    Computing Circulation in Pipe Flow using Velocity & Angular Direction

    I need to find the circulation for a flow in a pipe. I'm using the velocity in the angular direction (cylindrical coordinate system). Am I right in thinking that an ideal vortex is one where there is no vorticity? That would mean there is no circulation. It's strange, because the velocity is...
  13. S

    Applying Newton's cooling equation to a pipe cooling

    Hi. I'm trying to apply Newton's cooling equation (if relevent) to the following system. We produce plastic piping, extruded at about 200 'C and cooled via water sprays to 35 'C. We are trying to calculate how fast we can run the pipe through the cooling sprays. It's been a very long time since...
  14. L

    Fluid Mecanics : Force on a Y pipe

    Hi, I have a problem with the momentum equation in fluid mecanics. Here is my probleme. I have a Y pipe which is horizontal. The inlet velocity is Va, section A, mass flow Qa, and pressure Pa. The pipe is deviding in two sections B and C. I know Vb,Vc section B and C, mass flow at B and C and...
  15. M

    Pressure Drop vs Velocity in a Rectangular Pipe

    Hi guys I am currently using Comsol to model a single rectangular channel, a typical one found in a fuel cell (with symmetry boundary). Dimension of the inlet and outlet area is of the order 10e-3 and the length of the pipe is 0.1 m. I am having difficulty getting the expected result. The...
  16. 5

    Air flow in pipe, diameter change, affect performance?

    I am attempting to build an intake setup for an engine I'm working on. I currently have a 3" diameter aluminum pipe on the throttle body that just curves off to the side. I would like to try and get some cooler air by routing it down into the bumper. I have access to 2.5" diameter piping. I was...
  17. 3

    Fluid Mechanis - Pipe Flow Velocity

    Homework Statement I'm looking for a formula that has velocity at a certain point in a pipe. I only have velocity and pipe diameter. The problem goes something like: A Tube with a 0.075 meter diameter has four drains equally spaced apart with a cap at the far end. Each of the four drain...
  18. B

    How Do Velocity and Pipe Diameter Affect Water Flow in Gravity-Fed Systems?

    Hello there, Im trying to figure this assignment question and I have hit hurdle. Can someone please help with figuring out what the velocity and pipe diameter will be?? Question: In a plant 20m3(cubic)/h of water at 20 degrees C is to flow via gravity from a storage tank to another one...
  19. B

    Fluid Flow Calculation for Gravity-Driven System: Velocity and Pipe Diameter

    Hello there, Im trying to figure this assignment question and I have hit hurdle. Can someone please help with figuring out what the velocity and pipe diameter will be?? Question: In a plant 20m3(cubic)/h of water at 20 degrees C is to flow via gravity from a storage tank to another one. the...
  20. P

    Calculating Pressure Drop Across Valve in Horizontal Pipe

    Hi, 20m straight length horizontal pipe (60 mm internal diameter), steam flows at rate 0.5 kg/s, at midpoint there is a valve in the line. inlet pressure to this section of line is 5 bar (gauge), pressure at end of line is 3 bar (gauge). mass quality of steam is 0.8 and 2 phase flow occurs in...
  21. C

    Vector Statics question, hanging pipe

    Homework Statement My question is about the method used for calculation. The problem reads: There is a steel pipe of uniform size and density at a length of 31 ft. It's weight is 81 lbs. It is hung from a concrete deck with five concrete hangers. Measuring from one end of the pipe, the...
  22. F

    Heat Conduction through Carbon Steel Pipe

    I am not sure how to approach this problem. If you have a carbon steel pipe that is being heated on one end at a constant temperature of 1500C. Can you figure out how much distance in pipe will it require before it cools to 790C? The thermal conductivity of Carbon steel is 54 W/mk. Another...
  23. G

    Alternative to carbon steel for pipe manufacture?

    I am doing research into an internal corrosion/erosion problem on a methanol pipework processing line. The pipe is made out of carbon steel and I am looking at replacing it with a duplex steel like Inconel 625 or HASTELLOY. Does anyone know how I could go about working out the costs involved so...
  24. S

    Help! Calculating Water Flow Rate in Pipe

    Please help I'm going round in circles! Water on tank 12m high, feeding pipe 200m long and 125mm diameter. Open end. Given friction factor of 0.008 for the pipe and total of 3.2K for various fittings. Asked to find water flow rate in Kg/s in the pipe. Been looking at this for ages...
  25. C

    Designing experiment to detect pipe leakage using radiation.

    Homework Statement Is there such experiment to detect pipe leakage using radiation? I have opted to use radio-isotopes conduct this experiment. Homework Equations None The Attempt at a Solution How do i go forward with designing this experiment, knowing that I can use...
  26. C

    Strength of a partially Submerged Pipe Casing

    Im not sure how to analyze this. I have a 8ft dia. pipe casing that I am submerging into the mud in 10 ft of water. the top is open. What i need to find is if the .25" wall thickness is sufficent to keep the casing from collapsing. I know i have about 624 psf at the bottom of the casing...
  27. P

    Static pressure in round pipe bends do what?

    In the controversial and well misunderstood Bourdon gauge phenomenon, I found by experiments that a flat or oval shaped bourdon tube will increase in volume significantly as the tube straightens. I filled the gauge tube with water and moved the tube with my hands. As I straightened the tube...
  28. A

    Can Sonic Velocity Be Achieved in a Short, Constant Cross-Section Pipe?

    Can sonic velocity be achieved in a short pipe with constant cross-section, assuming isentropic flow with no viscous effects being taken into account? Thank you.
  29. I

    Calculating pipe size for closed loop watering system

    I am building a closed loop watering system and need help determining the minimum size pipe I need for the return drain pipe. The system will pump water from a reservoir through spray nozzles into 4 containers at a rate of 300 gallons per hour. Each container will have a drain pipe in the bottom...
  30. P

    Pipe deformation under pressure

    If a soft malleable metal pipe has a bend in it and is then pumped up with high internal static pressure, would this soft metal pipe seek to straighten out or would it simply remain in its bent shape due to pressure acting in many directions. I wonder if the most natural position of a pipe is...
  31. Y

    How Does a 90-Degree Bend Affect Pressure Drop in Pipes?

    I have a centrifugal pump that gives flow of 56 lit/min at 50 psi. Media: clear water, Temp. ambt The discharge pipe size: 1 1/2", Material: SS Total pipe length: 14 feet At 3 feet from pump discharge there is 90 degree bend and again at 6feet there is 90 degree bend. My question is what...
  32. L

    Calculating Water Speed in a Pipe: Solving a Fluid Dynamics Problem

    Homework Statement Water flowing through a 2.68 cm diameter pipe fill a 284 L bathtub in 8.2 minutes. What is the speed of the water in the pipe? Homework Equations p+pgh +1/2pv^2=p2 +pgh + 1/2pv2^2 The Attempt at a Solution I know that p=pat for both cases but the water does not...
  33. H

    What size square mild steel pipe will support load

    Can anyone please help me with a question re the minimum size square steel pipe needed to bear a load. I loved physics but never took mechanical engineering. I am rigging a winch to one end of a pipe to lift a static load (holding up a gangway temporarily to repair). The gangway weighs around...
  34. R

    Corrosion of Steel Pipe: Salt Water, Sand & Flow Rates

    What equations would show the process of corrosion of a steel pipe that is carrying salt water and sand and also would the corrosion rate be different if at different rates of flow?
  35. B

    Calculate Pressure Gauge Reading in Wide Section of Pipe

    Homework Statement Water flows at 3.64 L/s through a horizontal pipe that narrows smoothly from 10.2 cm diameter to 4.89 cm diameter. A pressure gauge in the narrow section reads 47.0 kPa. What is the reading of a pressure gauge in the wide section? Homework Equations F=PA P1+...
  36. N

    Pressure in pipes related to pipe size and pump for water filtration system

    Hi Guys I am trying to use a water filter in line with a 12V water pump rather than off the mains. The water filter requires 10psi minimum and a maximum of 125psi, I am using 15mm copper pipe and the pump is 800mm from the water filter. I have not yet decided on a pump yet as this is...
  37. J

    Deriving Half-Max Velocity in Pipe Flow

    Could someone help me with this. In pipe flow show that the average velocity is half of the maximum velocity. I have it written in my notes that this is true, but not how to derive it.
  38. D

    Pipe diameter expansion due to temperature increase

    Hi Firstly, this is not a homework problem. It's regarding some flow experimental results I have and to understand the results further I am trying to identify possible reasons for the patterns I see. I don't have expertise in thermodynamics hence finding the following problem a bit puzzling...
  39. J

    Calculating Pressure in a Pipe with Different Diameters

    Dont know if this is the right forum but here goes In a pipe with a diameter 0.15 there is a smaller area with the diameter 0.075 imagine a pipe with one part twice as small then after the smaller part its the larger size agian point A 0.15 smaller part point B 0.075 The...
  40. M

    Pressure Drop Due to Combining Flow in a Water Pipe System

    Hello, I am wondering how to determine the pressure drop due to fittings such as Tees and "Y's" when there are two flows coming in and one coming out. So for example there is a Tee where there are two flows coming in opposite directions (180 degrees from one another) and they combine and exit...
  41. W

    Sound of Music - Closed Organ Pipe

    1. One closed organ pipe has a length of 2.40m. a. What is the frequency of the note played by this pipe? b. When a second pipe is played at the same time, a 1.40 Hz beat note is heard. By how much is the second pipe too long? 2. f = nv/2L (n = 1) change...
  42. L

    Help Deriving Trajectory of Water out of Pipe

    I suppose this is also related to thrust vectors. I have a Y pipe with two exit nozzles. These exit nozzles are angled 43.75 degrees from the vertical and are at a radius of .1968m from the vertical. These nozzles have a deflector that can move from 0 degrees (fully open), to 90 degrees...
  43. Q_Goest

    Calculating Flow of Helium in a Verticle Pipe

    I have a long, 24" diameter verticle pipe. There is a flow of gas through this pipe in which pure helium enters at the top and exits at the bottom where it exits to atmosphere. In this case, there must be a gradient of gasses with helium at the top and air at the bottom and a mixture between...
  44. N

    Maximum Force on pipe Clamp it rotates or slips

    Hello, Is there anyone who kows how to calculate the force on a pipe clamp before it rotates or slips. Thank you very much...
  45. C

    Large double pipe heat exchanger - how to connect in series?

    I have designed a heat exchanger of the double pipe hairpin variety and with 6" and 8" concentric tubes. The overall length is 90m therefore I need to connect nine 5m hairpins (10m total length) together but thinking about the practicality of it is it possible to connect this number in series...
  46. O

    Can Changing Hole Diameters Result in Equal Volume Flow Rate in a Pipe?

    Here's my situation: I have a long pipe with n amount of openings along the top, that have an equal distance apart. At one end of the pipe a constant pressure is applied by a pump, and the pipe has a constant diameter all the way to downstream. I’m trying to find a mass flow rate by changing...
  47. T

    Reducing the pipe dimension to a heating device

    Let's say there is a water based heating device that has 3/4" connection nipples. The pipe that leads to the device is 5/4". If one ignores pressure- and head loss, does it make any difference how far from the device the pipe reduces from 5/4" to 3/4" ?
  48. C

    Counterflow double pipe heat exchanger

    Im just generally reading through the notes for thermal design for a counterflow double pipe heat exchanger. Is it possible for all temperatures inlets and outlets to be different for this type of flow arrangement? What is confusing me is the temperature profile graph where Th2 appears to...
  49. C

    Year 12 Sound Problem (Involves resonance in a closed pipe).

    Homework Statement Hi :) This question is from a test i had today. For some stupid reason we get to finish it off tomorrow. I figured i do what everyone else will, and sort out the what i didn't understand. Luckily this was it. Anyway, the question is typed from memory so it may seem a bit odd...
  50. D

    How Does Temperature Affect Beat Frequency in Organ Pipes?

    Homework Statement Chapter 12, problem 34. An auditorium has organ pipes at the front and at the rear of the hall. Two identical pipes, one at the front and one at the back, have fundamental frequencies of 264.00 Hz at 20.0°C. During a performance, the organ pipes at the back of the hall...
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