Pressure vessel Definition and 93 Threads

I am needing to calculate the fill time of a pressure vessel. I know the following parameters regarding the vessel: Volume, Temperature, Properties of the fluid media, inlet pipe diameter, flow rate of the inlet, pressure of the inlet. I tried calculating the mass flow rate of the inlet...

Hey guys I'm new here. I need to find a generic pressure vessel that can take in a gas at up to 6MPa and then have a quick release system that would allow me to very quickly depressurize/open it and remove the contents within ~10 seconds or less. Right now we use bolts to hold down the lid...

Homework Statement Problem: find the thickness of a Pressure Vessel. Given: Operating Pressure, Operating Temperature, Material type and Grade, and OUTSIDE Diameter/Radius Homework Equations q1. how to calculate Design Pressure/Temp. from Operating Pressure/Temp.? q2. how to calculate...

Homework Statement My question has to do with heating water to a superheated state inside a constant volume vessel. Given: A pressure vessel with a total volume of 36.77ft^3, is filled with 5 gal of water and heated from room temp. to a final temp. of 1100°F. Obvisouly the initial pressure...

My question has to do with heating water to a superheated state inside a constant volume vessel. Given: A pressure vessel with a total volume of 36.77ft^3, is filled with 5 gal of water and heated from room temp. to a final temp. of 1100°F. Obvisouly the initial pressure is atmospheric and...

Description is in the image as well as the question. I was wondering for a) do i need to take into account the compressive forces that is acting on the vessel? Cheers

Homework Statement Homework Equations σ=pr/t (hoop) σ=pr/2t (longitudinal) τ=VQ/It The Attempt at a Solution I have longitudinal stress and hoop stress. I'm trying to find shear stress, which should come only as a result of the 40kN from the collar correct? I'm confused...

Hi everyone, I have to determine the size of safety valve for an air pressure vessel. I found in ASME and BS 5500 a procedure to calculate the size of safety valve, which relates the mass flow capacity to the: pressure, temprature, discharge area, s.v coefficient, and air parameters. This can...

I don't know if its daylight savings or what, but I just can't seem to wrap my head around this analysis. There is a polycarbonate hemispherical head with 8 psi in a near vacuum environment (2.8 torr) Im trying to figure out what the minimum thickness is for the head. The shell is super...

I would like to make a pressure vessel with a pressure of about 9 bars/130.5 psi, that contains about 250 grams of water at about 175 degrees Celsius. My question is how big should the pressure vessel be.

Homework Statement Hi, this is my first time posting so I hope you can see the attachment. Homework Equations Hoop stress = pr/t Longitudinal stress = pr/2t The Attempt at a Solution I am stuck on part a), afterwards I think I should be fine. I am guessing you can "add" axial...

Hello, I have been designing a pressure vessel for the last week. I have based all my maximum allowable stresses on ASME code but can't figure out how to include drilled holes. I plan to be using a pipe welded to a cap at one end and attached to a blind flange with holes drilled in it at the...

Hey everyone, hoping someone can point me in the right direction with a deflection question. A pressure vessel I'm working on needs to be pressure tested before it can be shipped out to the customer, so I'm having a large plate cut to match the flange. The opening is about 1500mm in diameter...

Hi Guys I need to design a Cylindrical vessel, in which Air is to be heated from the bottom upto temperatures as high as about 500 C( 773 K) Since it s a closed vessel , the pressure will reach around 2.5bars. The volume of the vessel should be something around 1 litre. I know how to...

pls help-- thin-walled pressure vessel Hi, all. I have done an experiment of “thin-walled pressure vessel”. The vessel: length 200mm, outside radius 526mm, inner radius 47.6mm. There were two rectangle rosettes gauge in the vessel surface. Based on the experiment data (100 psi), the actual...

Homework Statement [PLAIN]http://img714.imageshack.us/img714/7747/43416215.jpg The attempt at a solution I have already solved parts (a) and (b). It's part (c) that I can't get. To get a minimum thickness at 50 MPa, I thought that the hoop stress equation would govern. Here is my...

Hello, I am looking for a seal design that would seal between the end plate and cylindrical section of a pressure vessel . The vessel is made of hastelloy X and has a working pressure of 4000 psi and a working temperature of 1600 deg F. ------------- ------ ...

Hi, I want to build a pressure vessel for casting Polyurethane under pressure. Does anyone know if it is safe to put an oil barrel under a pressure of 60 PSI ? (It has to be a barrel that can be opened and closed with a lid, other wise I can't put the mold in. :smile: )

I wanted to make a free body diagram of my air mattress. The mattress is comprised of air cells. Each air cell is a 30 inches in length with a diameter of about 4 inches. Each cell is inflated to about 0.4 psi. If I wanted to accurately model the whole bed (not just one individual cell)...

Hi, I am wondering if there is any guideline and examples of design and analysis according to EN13445.

If you had a pressure vessel with an end-cap welded on and this girth weld was to fail, how might you calculate the velocity of the end-cap assuming the tank is pressurized with water?

Homework Statement The inner diameter of a spherical gas container is 5m, has a wall thickness of 24mm and it is made of steel for which E=200GPa and v=0.29. Knowing the gauge presure in the container is increased from zero to 1.8MPA determine: a) The maximum normal stress in the container...

I was wondering if anyone could help me with the following question, please: A thin walled pressure vessel is to be used as a pressure accumulator in a number of situations all involving a number of different operation conditions some of which create cyclic stresses. The dimentions of the...

I have a vessel designed, built and certified to ASME Section VIII, Div 1, design rating of 100 psi at a maximum tempeature of 200 F. The new operating conditions for the vessel have changed. It will be operating at a maximum pressure of 30 psi at a maximum temperature of 260 F. Does the...

A pressure vessel is stamped with an MAWP of 150 psi at 450ºF. We are operating at 120 psi at ambient temperatures around 70ºF. Is it allowed to operate at the MAWP with a relief valve set to 165 psi if operating temperatures are always at the ambient level.

Im finding it really difficult to calculate the volume of a pressure vessel for my project. I have been only given values of pressure and temperature, where the pressure is 80psi and temperature is at room temp. Its difficult using the ideal gas law as i don't know the number of moles, nor i...

I have a question regarding the design of pressure vessels, which is: what is the 'maximum allowable working pressure'? i know the definition and all but i am struggling to understand whether the design pressure is based on the operating pressure or the MAWP? For example, let the given...

I have a very odd need for an experiment I'm doing. I require a container of at least 32 fluid ounce volume that is very rigid and strong; it needs to be able to resist preferably at least 100psi internal pressure (water will be inside) without deforming. The opening needs to be at least 2" in...

Does anybody knwo how calculate the required cross-sectional area of the bolts with internal pressure, according to the ASME code? I mean in which section, appendix, whatever. I have spent a lot of time trying to find this and I could not. But I can´t believe that an important standard, like...

hi, i can't find any standard defining design of unfired pressure vessels made from carbon fiber, kevlar, fiberglass or similar high tensile strength materials*. do standards like these even exist, since these materials are relatively new? * you know any more similarly competitive materials...

Hi All I'm looking into getting some shell and tube heat exchangers ASME certified for my company and was wondering if anyone could help me with the process. I know that we are trying to get a "U" stamp and need to get the code books that are required. There is also a few forms that we have...

I have to design a chamber where a range of small pressure vessels can be safely pressure tested. They range up to around 10 litres in capacity and are tested at 45 barg. The vessel is a thick wall tube with two domed end caps welded construction. I would like some guidance on how to calculate...

Consider a problem where a tank holds compressed natural gas, compressed to approx. 250 times atmospheric conditions. Now release the tank valve letting some of the gas out. Assuming a small timestep, I can approximate the energy lost as 1/2 mv^2, where m is the mass released during the...

Hi guys.. I am currently working on a research where I have totally no idea in. What are the factors i need to take into consideration if I were to design a pressure vessel?

Hi all, I have a problem I hope someone could help. I have a pressurized dry Nitrogen vessel. Given a known leakage rate, how long will it take for the internal pressure to be equal to atmospheric pressure?

Hi everybody, I've been going around in circles with this problem and not sure if I'm approaching it correctly. I have a vessel filled with a fluid and connected to a pipe (circular cross section) with a tap on the end. The pressure on the vessel is not atmospheric, it is about 1 bar...

I would like to check something. If I understand well, in the TMI accident, the reactor vessel was never damaged (in the sense of: having lost major containment function) ? Can someone confirm this, or correct my understanding ?

Hi, I'm trying to work out how to calculate the forces acting on a vessel containing a vacuum. The vessel is not cylindrical or spherical. Can anyone suggest any websites or textbooks that might be useful? Thanks

I would like to know what steps I need to take to become a certified pressure vessel designer builder and user. I searched the ASME website pretty extensively and there are a bunch of courses offered but it is hard to find anything specific on becoming certified.

I am trying to design a pressure vessel for testing purposes that is 12 inches long and must have an inner diameter of 1.5 inches. 1) What is the minimum thickness the walls can be in order to attain "vacuum" pressure (10E-6 torr)? I want to make the walls as thin as possible and still be...

Gents, I am looking for a design modification to accomplish 250,000 cycles of pressure loading in a short time period. We are going from 0 (1atm) to 10psi but currently only getting 10 cycles in 120 seconds. Enclosed is a diagram of the system. Details: Rate goal is 3hz Power Source is...

I am a novice at stress analysis. For my competition, I need to calculate the stress on a torus in vacuum filled with air at pressure P. Here's is what I have managed to do. I have attached an image below. The torus section is an angular section of a curved cylinder. Its angular dimensions are...

An enclosed cylindrical* (disc) vessel one inch thick and five inches in radius holding two pounds of fluid at ambient atmospheric pressure (14psi?)and being spun at 30,000 rpm's. Assume the centrifugal force acting on the fluid creates a pressure of 1,000 psi. The question is ... "If the...