Page 1 of 2 12 LastLast
Results 1 to 10 of 14

Thread: Propane Tank Recertification

  1. #1

    Default Propane Tank Recertification

    My propane tank is dedicated for automotive use but it's certification has run out. Can anyone tell me what is involved in getting it recertified?

  2. #2
    Join Date
    Jun 2008
    Location
    Birch Bay, Wa & Joshua Tree, Ca
    Posts
    1,130

    Default Re: Propane Tank Recertification

    check with your local propane distributor. It usually involves a visual inspection of the tank inside and outside, check the valves and seals. I would install new seals around the fuel gage. I would remove all rust from the outside and repaint tank (do it right). They will have to drain the tank so run it until it is out of fuel. That what they did with my tank and it was in good shape for being 12 years old at that time. I had to have mine out of the vehicle (40 gal wc manifolded twin 10 X 60")

    Larrycng

  3. #3

    Default Re: Propane Tank Recertification

    Great reply, Larry. I'll check into it. Thanks.

  4. Default Re: Propane Tank Recertification

    I have never understood why there is not a similar inspection regiment for LPG tanks similar to the CSA inspection program for natural gas cylinders. I have found documented figures for exceptable damage for LPG tanks, but it is hard to find consistent data. Every propane tech I have talked too mentioned cutting off the data plate to inspect for excessive pitting in that area, and after inspection reattaching the data plate with non-corrosive industrial adhesive. I like using 3M products for reattachment, as they seem to withstand the heat from direct sunlight. Do not use a Silicon based product for this purpose, as it may cause corrosion that you are trying to prevent. I have found leaks on LPG tanks at the weld joints where the cylinder portion of the tank is attached to the dome. A technician did repair this tank without removing it from service, but I will not mention how it was repaired due to liability concerns. I do feel confident that the repair was performed correctly, but it was done in a rather unconventional manner. I like using LPG because it can be stored for very long periods of time, at a very high energy density relative to CNG. And unlike LNG does not require constant energy inputs to remain in it's liquid state. Good luck.

  5. #5
    Join Date
    Sep 2008
    Location
    On our ranch, deep in the heart of South-Central Texas.
    Posts
    215

    Default Re: Propane Tank Recertification

    ABSOLUTELY and POSITIVELY DO NOT CUT OFF THE DATA PLATE! Sorry for the caps but I meant to shout! I have NEVER heard of a qualified technician cutting off a data plate and re-glueing it. There are some European tanks that the dataplate is glued on from the factory but that is different from this application.

    If there is corrosion behind the plate, it will be evident elsewhere too. The ASME code for motor-mobilefuel tanks requires a visual inspection at any time by the refueling attendant. Some states by individual state code may require inspections at regular intervals. The current ASME code does not place a retirement life on an ASME motor-mobilefuel tank.

    Canada and other countries may have additional codes for inspection. I can tell you, that in my real day job, if I ever see a data-plate that has been removed and reinstalled, that tank is reconfigured as a barbeque pit. There is no legal standing that that particular tank didnt start life as something else and was retagged.

    Franz

  6. Default Re: Propane Tank Recertification

    I agree with your comments Franz. I do find it interesting that it is acceptable to replace a label on a CNG cylinder and return it to service if the cylinder can be identified through a serial number, and the manufacturer can still be contacted for a replacement label. I would not recommend to anyone that they remove the data plate for inspection on an LPG cylinder, as that is not an approved method of inspection. I was only relaying what others in industry have discussed with me. I was curious to see if their concerns had any merit and removed the data plates from tanks that had gouges and dents that required them to be removed from service. All the tanks in question were from southern CA where road salt is not used, and out of the three that I inspected, all of them had pitting corrosion that exceeded industry standards. Please keep in mind that these cylinders were slatted for destruction. I would not have given it a second thought had I not discussed this with multiple service personel. I am not implying that this is wide spread, but I personally will no longer install non new tanks on my vehicles after seeing the damage that I witnessed. When gasoline hit $5 a gallon I had everybody and their brother asking me about conversions to LPG, and they were pulling 70s Circa cylinders out of the wood work that were in my opinion only good for boat anchors.

  7. #7

    Default Re: Propane Tank Recertification

    Thanks for all the great input. I will find a certified propane technician. Have him replace all that needs replacing and hopefully put this unit back to service. It is about 3/4 full. I know that a propane service center can drain it but how will they handle that. Will they give me credit for the fuel? I just want to know what to expect.

  8. #8
    Join Date
    Sep 2008
    Location
    On our ranch, deep in the heart of South-Central Texas.
    Posts
    215

    Default Re: Propane Tank Recertification

    You will lose the contents of the tank, sorry! You never indicated what size tank you have, but most companies will flare the contents (burn stack) unless the tank is large and the contents worth enough to recover.

    When I refitted my tank on my last vehicle (1983 Brunner 28 gallon), I spent about $130.00 on fittings (liquid draw, pressure relief, backcheck fill, gauge seal).

    Franz

  9. #9

    Default Re: Propane Tank Recertification

    Blister et al,

    Isn't there an NFPA-58 requirement for a recertification after 12 years for DOT tanks?

    afvman/Bill

  10. #10
    Join Date
    Sep 2008
    Location
    On our ranch, deep in the heart of South-Central Texas.
    Posts
    215

    Default Re: Propane Tank Recertification

    DOT cylinders are indeed recertified after 12 years. The recertifying party must have a Requalification Identification Number issued by the DOT which establishes some tracability for the cylinder requalification. Whether or not a particular state recognizes this requirement is up to each particular state through legislative action. For example, in Arkansas recently, I learned that they dont recognize the RIN, or the OPD for that matter. They have a "State Rule" which they recognize instead of the NFPA pamphlet.

    Some states rely on a fire marshalls opinion for determining specific safety issues and that has been a real mess.

    Franz

Page 1 of 2 12 LastLast

Similar Threads

  1. CNG tank recertification
    By Ultrajim in forum The Lounge
    Replies: 8
    Last Post: 12-10-2010, 08:29 PM
  2. Propane Tank Dillema
    By Bilster in forum Other Alternative Fuel Vehicles
    Replies: 2
    Last Post: 08-26-2009, 08:36 AM
  3. Can my 2001 cng van be converted to propane?
    By kimsnipes in forum CNG Service & Conversion Manufacturers
    Replies: 1
    Last Post: 04-11-2009, 06:28 PM
  4. Propane Forklift to CNG?
    By Beer Shaker in forum CNG Service & Conversion Manufacturers
    Replies: 2
    Last Post: 10-11-2008, 12:45 PM
  5. Propane Mower
    By BRodri in forum Other Alternative Fuel Vehicles
    Replies: 1
    Last Post: 09-19-2008, 05:54 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •