Earl and the Aboveground Storage Tank Forum for fuel tanks, plastic tanks, fuel oil storage tanksWelcome to the aboveground storage tank forum, a bulletin board dedicated to tanks, fuel tanks, plastic tanks, fuel storage tanks, and above ground storage tanks (AST) API650, API653 & UL142 aboveground storage tanks (AST) and chemical plastic tanks. Remember the forum is made up of volunteers from experts to beginners. Unfortunately, we cannot allow free commercialism that promotes products, services, or sites.
Sponsored by:
Contact us about advertising
Earl   AST Forum  

Internal Floating Roofs

Saturday, June 02, 2018   By: Dunedin [1843] 1 Stars
Full Contact v/s Pontoon IFR - which type is best, and why? Is anyone up to the challenge?

Post a Reply...
Viewed 207 times

Saturday, June 02, 2018   By: DavidR@Fast.net [39] 5 Stars
The following is my opinion only, I am not totally unbiased and you are reading this on the internet! Non-contact are cheaper and can fit into the tank through a shell manhole The US EPA does not distinguish between full- and non- contact seam losses! Honeycomb full-contact typically have their top skin only about 1 1/2 inches above the liquid vs 4 inches or more for non-contact. That said, because there is no vapor space under the deck full-contact should have the following advantages: 1 lower corrosion, 2 increased safety, and 3 lower emissions also 4 they can be and some are made much stronger than non-contact, 5 at least one vendor makes them without drains lowest emissions and designs their supports and connections to the same strength as steel floating roofs so at least that one is additionally safer to walk on, 6 some honeycomb full-contact qualify for rim fire protection vs full-surface foam protection systems.

Post a Reply...
Viewed 190 times

Saturday, June 02, 2018   By: Dunedin [1843] 1 Stars
Thanks David Could you just expand on Item 6 which I assume relates to NFPA11? Is the regulations concerned with the seal or IFR surface protection?

Post a Reply...
Viewed 175 times

Saturday, June 02, 2018   By: DavidR@Fast.net [39] 5 Stars
Per NFPA-11 section 5.4.2 rim-protection is suitable for steel double deck, steel pontoon, full liquid-surface, metallic sandwich panel conforming to API 650 H and full liquid surface contact composite sandwich roof / seal system designed in accordance with several requirements Ill leave to you to read. All others required full-surface protection. this means more foam. On the other hand, per full-surface systems do not need to have separately valve laterals for each foam discharge location. In other words, full-surface systems can have a single pipe coming into the dike with a ring pipe around the tank leading to individual riser pipes to each foam discharge while a rim-protection system needs separate valves and pipes outside the dike for each foam chamber.

Post a Reply...
Viewed 166 times

Sunday, June 03, 2018   By: Dunedin [1843] 1 Stars
Viewed 170 times

Published on ast-forum.com


Atmospheric Design Pressure
By: Fathi [46]

The whole story is to avoid brittle fracture=

Test temperature shall be equal or warmer than Minimum Metal Design temperature at Test pressure.

I would limit my minimum testing temperature for a tank (or even for a vessel or a piping system) by the =

Temp = maximum of [ Min(lower shell) , Min(shell# 2) ....Min (Upper shell) ]

For a Shell# i the minimum is function ( of shell tickness , Material group ) and this can be found in API 650 , Fig 2-1

A similar a....   Read All

It's hard not to look at this ad at least once, then you go to the next page an notice it again. Maybe you will not read the message, but you will be thinking about the brand and we call that brand impressions.

About 2/3 of internet traffic is useless traffic and consist mostly of malicous-bad-robots.  However, there are good robots too.  We block bad-robots, and allow the good one's through, but we just do not count the good one's.  We want good straight-brand impressions for our advertisers with human impressions.

Imagine your static or animated display advertisement placed here, and if that is not enough you can include text too to expound on the virtues of your services and or products.    In addition, you can benefit by using our new advertisement feature to have your video included in your ad space.  Wow, make an infomerical with text and a display by combining all features to enhance the readers or audience's experience using your brand.  Ads can be much more than a static display ad. Here is an example of how your video could be used or position in this ad space


Caption: Public domain video showing a CB&I (Chicago Bridge and Iron) aboveground tank being built on-site. The author of the video is not an advertiser and is being used to show how the video ad can be of value to the reader since you have already being viewing the video.  It is hard not to think about the authors brand after viewing the video ad.  This is the benefit of Branding.

 - Ask for our Media Kit -



A Long-game that Earns Tomorrow's Sales

 Click on this Promotional Advertisement to Contact Us Today!

Good Branding Puts Your Brand or Company in the Front of a Decision-Maker’s Mind for a Purchase either Months from Now or Five-Years in the Future.

Good branding makes your brand or company the leader in a crowded field of other brands or companies vying for your potential or existing client's attention. 

An invitation to the buyer's table to negotiate potential sales from $thousands to $millions of dollars in any of these: Systems sale, Capital Equipment, Upgrades & Modifications,  Repairs, or Capital Project becomes easier now with a recognized brand that thinks forward by brand advertising.

Your advertising will cost you an unbelievable low amount, so ask for our Media Kit that has Specs and Rates. 

Below is some of our demographic data for ast-forum users will speak for itself:

Bus Sector Percent   Education Percent
Manufacturing 18%   College+ 70%
Power Gen 2%      
Chemical 4%      
Petroleum 40%      
A&E 6%      
Construction 12%      

Our network works hard for you with placements for full coverage on part of the network, or full network placement.  Brand yourself today and don’t miss-out on being invited to your client or future client's table because they forgot you.  Be the leader they will remember and be part of their capital project.  Tomorrow’s clients are your future.


Advertising and Marketing Agency for the ast-forum
PE Marketing, LLCBranding.jpg
Industrial Training School - Basic Electricity
ITS - Maintenance
Industrial Training School - Steel Making Tutorial
Steel Maiking Tutorial
AIS Forensic Engineering, PC
Confidentiality, Disclaimer & Policy
© 2001 to AST (Aboveground Storage Tank) Forum, All Rights Reserved.
PE Marketing LLC is representing the steamforum for advertising and marketing
Valid XHTML 1.0 Transitional