Vessel Definition and 226 Threads

Hi all, I am facing the problem with shore power supply for the vessel. At our ship yard, sometimes we need to arrange temporary electric supply for the vessel meanwhile their generators are overhauled. For 440 V 60 Hz i am using portable generator supply and for 415 V 50 Hz supply i am...

Homework Statement A vessel whose walls are thermally insulated contains 2.40kg of water and 0.450kg of ice, all at a temperature of 0.0 C. The outlet of a tube leading from a boiler in which water is boiling at atmospheric pressure is inserted into the water. How many grams of steam must...

This is a real world problem. We have a vessel sunk in about 50' of water and need to raise it. We have devised a way to pump the water out and pump air into replace the water. It is important that we keep the differential pressure very close to Zero and running a "snorkle" tube is not an...

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...

Homework Statement Compress air vessel has a volume of 10 ft3 .Cooling coils holds its temperature at 68F. The pressure now in the vessel is 100 psi. Air is flowing in at the rate of 10 lbm/hr.How fast is the pressure increasing? The Attempt at a Solution What I have done is...

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...

Homework Statement A vessel of cross section 20 cm2 has at the bottom a horizontal capillary tube of length 10 cm and internal diameter 0.5 mm. It is initially filled with water to a height of 50 cm. Find the time taken to empty one half of the content in the vessel. Viscosity of water is...

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...

Recently, my boss asked me about the calculation or formula to calculate the size of water filter vessel ( bullet shape ) which is suitable for a condominium. I fail to find any formula from the Internet, so can someone help me to find the formula? Much appreciation. From one of the...

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. ------------- ------ ...

Forgive me because I'm not a math or physics wiz but I'm at a dead end trying to calculate the pressure generated by a deflagration inside a cylinder. I have been searching for a formula but I've come up with nothing. Here is an example scenario: I have a cylinder with a height of 9cm and...

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...

Hello. Up until this point I have been solving this numerically, by propagating the state vectors and checking for a collision, however that is inefficient, so I would like an analytic solution. Given lengths r, and d, as well as angle t, is there a way to find length s?

Friday morning I was sitting at my desk when I felt this burning sensation in my left hand. Suddenly the middle joint of my index finger started swelling up and it was very painful. Then the middle joint turned purple and looked like it had been hit with a hammer. It's been two days now and...

Need help with understanding with visual diagram how sonic antifouling for marine vessels work.

http://www.newscientist.com/blogs/shortsharpscience/2010/05/deadly-bubble-jet.html This is insane, and frightening. The USA diplomatic response: https://www.youtube.com/watch?v=<object width="480" height="385"><param name="movie"...

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...

First of all I have to say I have really confused myself on this one by overthinking and I'll ask my questions step by step. Any help would be greatly appreciated. General rule is when blood vessels constrict blood pressure increases. 1. Ok there is a container and gas molecules in it. If I...

Hi, I want to know how I calculate the mass flow rate, volumetric flow rate and time required to depressurize a vessel, knowing the pressure inside the vessel, the output pressure, the orifice and the gas characteristics. For example, imagine a vessel full of compressed air (let’s say 10...

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.

vacuum vessel / distiller correct wall thickness?? Hello! I have a vacuum vessel / distiller type of vessel with following:- Temperature inside the vessel max. 200°C [Celcius] and a Vacuum at max. -80kPa = -0.8bar Material: SS-304 = Stainless Steel Volume = 0.654m³ My main question...

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...

Cerebral small vessel disease...does it lead to dementia? My mum (51) has recently had a TIA and has been diagnosed with CSVD. She has some dysphasia and memory trouble. She has had bloods...all normal, lipids at 5.5 (put on meds to bring it down to 3.5), carotid dopplers - normal, all vitals...

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 been trying to create a 100% saturated steam (no N2) environment, which should not be too hard but so far I have been puzzled by my observations. For this I have obtained a vacuum vessel (1 ft high by 1 ft diameter cylinder) and a roughing vacuum pump. I have instrumented a pressure...

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...

Temporarily communicating vessel isolated hydroelectric power plant with swimming piston, driven through hydrostatic pressure One fixes to the bottom of a pool filled with water a cylinder also filled with water. On the bottom of the cylinder there is an initially closed valve, referred to as...

Hello all, I'm trying to calculate the float line on a conical shaped vessel in water. The properties of the vessel are: Weight - 10kg Area of base of vessel - 0.311m2 I am using an equation I came across here: http://answers.yahoo.com/question/index?qid=20080317200108AA5yNzY"...

Homework Statement Homework Equations I cannot work out the last part (iii) All other parts have been solved. The Attempt at a Solution From part (ii) I found the new height of the water, and therefore the volume of water and air in the vessel. The Pressure of the water P1 can't...

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, I have no chemistry background and my head is swimming with heat of formation heat of combustion heat of explosion enthalpy ideal gas law and so on What I'm trying to find out is how would I go about calculating the maximum pressure produced inside a vessel when a known amount of...

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...

Homework Statement We're told the density of ever material involved here, the liquid in the vessel, called "LAB", the water on the outside, and the acryllic that the vessed is made of. LAB: 860 kg/m^3 Water: 1000 kg/m^3 Acryllic: 1185kg/m^3 Also, the wall thickness of the vessel is 5.4 cm...

Homework Statement We're told the density of ever material involved here, the liquid in the vessel, called "LAB", the water on the outside, and the acryllic that the vessed is made of. LAB: 860 kg/m^3 Water: 1000 kg/m^3 Acryllic: 1185kg/m^3 Also, the wall thickness of the vessel is 5.4...

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...

Homework Statement A closed rigid vessel contains 0.1 kg of water vapor (steam) at 1 bar and 200 C. The vessel is plunged into a bath containing water and ice. After the vessel cools and reaches equilibrium with the bath, the bath still contains water and ice. a. What is the volume...

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?

Hello, I got a pratical problem; I want to know the gas temperature of SF6 gas inside a vessel. I can't insert a temperature probe to measure the temp. What i can do is clamp a temp. probe to the ouside of the vessel. Does this gives me a realistic reading, bare in mind the wetter...

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?