Vanagon EuroVan
Previous messageNext messagePrevious in topicNext in topicPrevious by same authorNext by same authorPrevious page (October 2012, week 1)Back to main VANAGON pageJoin or leave VANAGON (or change settings)ReplyPost a new messageSearchProportional fontNon-proportional font
Date:         Wed, 3 Oct 2012 18:14:25 -0700
Reply-To:     Stuart MacMillan <stuartmacm@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Stuart MacMillan <stuartmacm@GMAIL.COM>
Subject:      Re: propane tank question
Comments: To: Mike S <mikes@FLATSURFACE.COM>
In-Reply-To:  <506CD0EA.5090401@flatsurface.com>
Content-Type: text/plain; charset="US-ASCII"

The Rego manual mainly focuses on large tanks, 500 gallons or so. Here is the relevant passage for our tanks:

DOT Cylinder Purging 1. Exhaust to atmosphere any air pressure in the container 2. Pressurize the cylinder to 15 psig propane vapor 3. Exhaust vapor to atmosphere 4. Repeat four more times

The pressurization with propane vapor to 15 psi requires special equipment.

Stuart

-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Mike S Sent: Wednesday, October 03, 2012 4:58 PM To: vanagon@GERRY.VANAGON.COM Subject: Re: propane tank question

On 10/3/2012 7:09 PM, Robert Mac Dowell wrote: > Let me put it this way. I had all the valves and bungs out of my tank > when I painted it. All this purging bull is just that,bull.

Which is, of course, why the National Propane Gas Association, which doesn't know as much as you do about propane, publishes a bulletin covering the proper procedure for purging, Bulletin #133-89 (a).

And, the idiots over at Rego, an international manufacturer of propane equipment, who not as wise as yourself, say things like ( http://www.regoproducts.com/PDFs/LP-Gas_Servicemans_Manual.pdf ):

"The Importance of Purging A very important step which must not be overlooked by LP-Gas distributors is the importance of properly purging new LP-Gas containers. Attention to this important procedure will promote customer satisfaction and greatly reduce service calls on new installations. Consider the following: . Both ASME and DOT specifications require hydrostatic testing of vessels after fabrication. This is usually done with water. . Before charging with propane, the vessel will contain the normal amount of air. ... Both water and air are contaminants They seriously interfere with proper operation of the system and the connected appliances. If not removed, they will result in costly service calls and needless expense far exceeding the nominal cost of proper purging. ... If the natural volume of atmosphere in the vessel is not removed before the first fill, these problems will result: . Installations made in spring and summer will experience excessive and false container pressures. This will cause the safety relief valve to open, blowing off the excess pressure. . The air mixture present in the vapor space will be carried to the appliances. This may result in as many as 5 or more service calls from pilot light extinguishment. . If a vapor return equalizing hose is not used, the contained air will be compressed above the liquid level, resulting in slow filling. . If a vapor equalizing hose is used, the air, and any moisture it contains, will be transferred from the storage tank to the transport."


Back to: Top of message | Previous page | Main VANAGON page

Please note - During the past 17 years of operation, several gigabytes of Vanagon mail messages have been archived. Searching the entire collection will take up to five minutes to complete. Please be patient!


Return to the archives @ gerry.vanagon.com


The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.

Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.