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  1. ed72073

    Help me understand Thin wall Pressure vessels

    Thank You with your responds, I was think based on the formula it falls under a thin wall vessel, but I was unclear ant not sure that is why I asked. Basically all the others that are larger diameter with the same wall thickness would still be a thin wall vessel, assuming the formula of R/t > 20.
  2. ed72073

    Pressure Vessel alterations and safety

    I have loaded another photo with some description of what I am trying to explain, hope I explained it for you to understand. The valve is not the main concern, but will cause an issue if it was to fail or break. The main concern is the area of where the flange has been welded to the pressure...
  3. ed72073

    Pressure Vessel alterations and safety

    Ok I have attached a photo for everyone to look at and hopefully I can explain what it is I am asking. In the photo there is a pressure vessel that is used with sandblasting that comes certified from a manufacturer. Afterwards there is a flange or ring that is welded to the head pipe to allow a...
  4. ed72073

    Help me understand Thin wall Pressure vessels

    I don't know if this is the correct area for my question, but I am trying to understand what is considered a thin wall pressure vessel. First I am no expert in any way, and this site has more information that I can even understand at times, but I know I should be able to have my questioned...
  5. ed72073

    Pressure vessel with pneumatic vibrator

    Well I have an update to one of the pressure vessels that was inspected. The ASME tag was removed and the inspector would not allow the pressure vessel to be used or operated without have the tag. The customer contacted me for an answer as if I knew what happen to the tag or if I could provide...
  6. ed72073

    Pressure vessel with pneumatic vibrator

    That is my exact point, there are lives at great risk, and the companies need to take corrective action to insure no one is injured or killed. The difficulty that I have run into is I am just a little voice to all the huge companies that don't want to be bothered. I hope soon those I have...
  7. ed72073

    Pressure vessel with pneumatic vibrator

    There are some updates, but things are moving very slow. I have been in contact with several state inspectors and some persons at where the pressure vessels are located, but I have old or few contacts there. The state inspectors have been great to work with, and some I get no responds back, also...
  8. ed72073

    Manifolds or headers questions

    No that is not a typo. A pre- certified header would be fast and easy, the only issue is where the couplings or position of the couplings are located. To mount up to an existing piping the coupling need to be laid out for each header. The piping is welded through a plate and there is nothing...
  9. ed72073

    Manifolds or headers questions

    I understand the extreme dangers involved, and not being ASME certified this is why I was asking. If the headers need to be make then I am going to have the made proper, but ultimately that will be the decision of the customer. I can't believe the amount of people that I deal with have no regard...
  10. ed72073

    Manifolds or headers questions

    The design pressure is main supply that is usually 100psi. and the temp would just be atmospheric, if this answers your questions correct.
  11. ed72073

    Manifolds or headers questions

    Is there a rule of thumb for welding manifolds or headers that use compressed air? I am sure there is a simple answer, but I don't know where to look, that is why I am asking here. I have two size manifolds that I need to fabricate, but I am think it needs to be done by a certified shop. These...
  12. ed72073

    Pressure vessel with pneumatic vibrator

    I have contacted several members of The National Board of Boiler and Pressure Vessel Inspectors in the states that I know these do exist in, and I am finding that some have less requirements than others. The local inspector here in Illinois I have had great communication with and he is taken...
  13. ed72073

    Pressure vessel with pneumatic vibrator

    I am located in Illinois, but these pressure vessels are all over the Midwest and outside of the USA. The pressure vessels are used in companies such as Ford, Chrysler, Borg Warner, American Axle, Dana, ALD, Caterpillar, Pratt Whitney, and others. Not all of the pressure vessels have pneumatic...
  14. ed72073

    Pressure vessel with pneumatic vibrator

    Hi everyone, I have been following this site for a while but never really post questions. There is more knowledge on here than I can ever interrupt, but I have some questions. First I work where there are many pressure vessels that are used for gear process blasting or peening. These are...
  15. ed72073

    Harden Metals before Heat Treat

    I am looking to use some type of metal to make a valve seat out of, this is a pneumatic valve. The original is urethane type that works well, but I want to make it out of metal without the heat treat process. I have been told that most metals have a hardness of low 20 HRC and anything above that...
  16. ed72073

    Modifying a pressure vessel

    One other thing I forgot to mention. The company also has welded blocks onto the vessels to mount a pneumatic vibrator that run constant when they are pressurized.
  17. ed72073

    Modifying a pressure vessel

    I think I have figured how to attach a photo, see if this works.http://files.engineering.com/getfile.aspx?folder=1e4ddfb5-e5fd-45c8-ab21-ea5537ec1bd8&file=vessel.jpg
  18. ed72073

    Modifying a pressure vessel

    These tanks are usually 36" diameter and 6'-7' tall (without the legs) and are used for shot blasting equipment. The reason for a double chamber is to have one part always pressurized and the other to do an exchange. The storage area does not add much weight, the media being used adds about 6k...
  19. ed72073

    Modifying a pressure vessel

    Hi everyone, I am a newbie to this forum, but I have some question regarding modifying a double chamber pressure vessel. These vessels are purchased and certified from the manufacturer and then are modified. I feel that a vessel can be modified only if it is done by a certified person and or...

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