Welcome 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:
VAP-O-LOC GRE INTERNAL FLOATING ROOF / COVER
Stop Evaporation and Pollution
Excellent for tanks storing motor gas, ethanol, bio-diesels, bio-fuels, acids chemicals and many others to prevent losses and pollution
Built from Glass Reinforced Epoxy (GRE) an Advance Composite Material
Pre-fab, Honeycomb Sandwich Construction
Quick-to-install
Strong Unsinkable
Zero Maintenance
Will not rust, rot or corrode
Capture in excess of 98% vapor loss
Compliant with API 650, ASME RTP-1, BS4994-1987 & ASTM E-84
A Product by Dynaglass since 1971
Mesa Rubber manufactures products for aboveground storage tanks, including
Flexible Pipe
Floating Roof Drains
Skimmer Systems
Seal Systems
Gauge Pole Covers
Leg Boots
Vapor Recovery Bladders
Collapsible Storage Tanks and
Foam Delivery Systems
ATEC STEEL is an industry leader in the design, fabrication and construction of Field Erected Storage Tanks, Shop Built Tanks, Specialty Steel Fabrication and ASME Pressure Vessels. We are compliant with API 620, API 650, API 653, ASME, AWWA D100 and other recognized national and international codes. We satisfy all of the stringent requirements that allow us to maintain our ASME S, U, and NBIC R code stamp certifications.
At ATEC Steel, our quality assurance and quality control programs are unmatched in the industry. Our steel procurement is directly from the mill, which allows us to offer our clients the most competitive pricing available in today's market. Our pricing advantage, high quality fabrication and safety in the shop and field have made us the -Engineers 1st Choice in Storage-. Check us out on your next project. You will find our attitude, technology, experience and capabilities make us the -BEST CHOICE- for your project!
In Knockdown Steel Fabrication and Field Construction Services, we are the market leaders in North America!
ETANK2000: The #1 CAE tool for aboveground storage tank design / re-rating / inspection evaluation to API-650, API-620, API-653, & UL-142
API-650, Incl. Appendix A, E, F, J, M, R, S, SC, V, X
API-620 Incl. Appendix L
API-653 Incl. Appendix B (Shell Settlement)
UL-142 Steel Aboveground Tanks for Flammable-Combustible Liquids
API-2000 (Requirements for Thermal Venting)
AMETank (comming soon): All of the ETANK2000 engineering / code calculations plus Bill of Materials, Fabrication Drawings, and (soon) Estimating.
E-WARE, INC.
4611 Broad River Road, Suite I
Columbia, SC 29210
Jeffcoat Smitt
jeffcoat@etank.com
www.etank.com
Ph: 803.750.9055
Ph2: 937.203.Tank
Fax: 888.680.1861
Aluminum Domes - Only the EXPERTS in STORAGE CONTAINMENT, Tank Connection Affiliate Group, could bring you aluminum dome construction that is designed, manufactured and constructed better than competitor products.
At AluminumDomes.com, we offer precision quality, premier design, innovation in application and unmatched field installation services.
Constructed entirely of aluminum utilizing our proprietary component fabrication, our domes are corrosion resistant, maintenance free and are designed for extended service life.
Landmark Tank Services (LTS) provides over 25 years of engineering, fabrication and specialty contracting expertise, with hundreds of design / build projects delivered for clients in the industrial, military and municipal markets.
Landmark can apply proven solutions for your projects based on a broad knowledge of applicable API, ASME AWWA, NFPA, NSF, UFC, SSPC and NACE codes and regulations.
Landmark tanks are fabricated and erected worldwide.
Landmark self performs a majority of our fabrication, construction and repair process including:
- Engineering
- Steel Fabrication
- Steel Erection
- Piping Systems
- Coatings (SSPC QP-1 & QS-1 Certified)
- Civil, Foundation and Concrete Work
Landmarks comprehensive technical standards and quality assurance
procedures allow us to deliver consistent, high quality results for all of our
projects in a timely manner.
Contact Us Today for Your Next Project:
Landmark Tank Services
1665 Harmon Road
Fort Worth, Texas 76177
www.teamlandmark.com
www.LandmarkSteelFabrication.com
Ph: (817) 230-8857
Center pole bouyancy - Tuesday, January 03, 2012 - Tankee [235]
Someone recently told me that if a 24 diameter center pole didnt have mouse hole cutouts in the bottom, there would be a buoyancy issue when the tank was filled. I understand the dynamics and physics of this statement but is it an actual relevant and valid concern when the pole is weighted down by large I-beam rafters and the cone roof material on top of it? Is it more of an issue of applied stresses to the roof and rafter connections, and not an actually worry about the center pole floating out of position?
Re: Center pole bouyancy - Thursday, January 05, 2012 - CNT [492]
Buoyancy can throw my head for a loop sometimes, but this is what it looks like to me:
2 dia x 52 tall tank neglecting wall thickness -- Volume1,222 gallons. 1 gal. water @ 8.34 lbs -- Displaced weight Buoyant force 10,200 lbs. H2O -- 7,344 lbs .72 Sp.Gr. Assume the center column is actually 55 ft long. Std. wall 24 pipe weighs 94lbs/ft and Sch. 40 weighs 171lbs/ft not sure what schedule would be used for a center column. So the pipe is going to weigh at least 5,190 lbs and maybe 9,400 lbs or more.
Even with the thinner std. wall pipe, I would think your downforce from the rafters and such would be more than 5,000 lbs. Using a heavier wall pipe, nearly negates the buoyant force all together.
Re: Center pole bouyancy - Thursday, January 05, 2012 - CNT [492]
Regardless of the buoyancy question, I think mouse holes are a good idea. Nice big ones. The issue is with the potential for pin-holes in the welds. If there is a leak, the center column could be full of fuel and it cant be tested. There is also potential for fumes to get into the center column from the top. Now it seems to me that there would be a hazard in your tank and it would be potentially dangerous to weld attachments to the column as is common to do during construction/repair work.
With the mouse holes nice big ones and at least two please the column can be washed out, sniffed, and proven to be free of liquids and vapors.
You want at least two holes and they need to be big enough that they wont clog with gunk and that they can be washed out. Two holes lets the cleaners wash from one side and have the gunk and liquid flow out the other. 1 to 1.5 mouse holes should be good. I have found anything smaller than 1 leads to clogging problems, in which case you know you have liquids and vapors trapped, but cant get them out and purge holes or other mouse holes have to be air drilled.
I will acknowledge that there are arguments against mouse holes that are probably just as sound as my arguments for mouse holes. Arguments against typically assume the base plate weld is good, and keeping the inside of the column dry and clean is better than getting it wet and gunked up. Ive dealt with refined products. In crude and asphalt service, mouse holes might be a bad idea.
Ive run into enough columns where the base plate weld has had a pin-hole in it and product leaked out during cleaning, that I have gone to insisting on mouse-holes to avoid the unexpected cleaning/gas-free delays.
Then there is the discussion of Pipe versus Structural Columns. Structural eliminates the whole mouse-hole debate, but causes floating roof seal issues that you may or may not have anyway with a pipe column.
Re: Center pole bouyancy - Thursday, January 05, 2012 - DavidR@Fast.net [39]
Some folks put couplings and plugs in the column to have it dry inside but have a way to check it also. Columns with holes have emission issues when there is a floating roof.
Re: Center pole bouyancy - Friday, January 06, 2012 - Tankee [235]
We are going with mouse holes and there is not going to be a floating roof. We just have a big corrosion issue and I was concerned about inside the center pole since we cannot properly apply the lining inside. We will be lining the tank internally and have a nitrogen purge blanket. I got them to go to a thicker schedule pipe, but I suggested no mouse holes because of the corrosion issues and that was when the foreman mentioned the bouyancy issue. I figure we could get the inside coated, but it would probably be costly and tough to verify. I have seen the problems of leakage inside a supposedly seal welded center pole I got a mouthful of crude when I drilled a hole in one to check. Appreciate the comments!
Re: Center pole bouyancy - Friday, January 06, 2012 - BABRTs 973 [53]
Sch 80 Center column, welded to a 1/2 inch thick base plate, with the rafters and the roof holding it down. I have not done the calculations but somehow I do not think bouyancy will be an issue.
AIS Metallurgical Testing and Laboratory from failure analysis to impact testing.
Pressure Vessel Safety Awareness Training Tutorial is sponsored by Industrial Training School and AIS Forensic Testing Laboratory.
For training on Pressure Vessel Safety and simular subjects email us at admin@industrial-training.org or visit us at www.industrial-training.org
AIS Forensic Engineering: Failure Analysis and accident investigations from mechanical related failures to explosions with expertise in accident investigations on:
Explosions and fireballs
TCS or SiHCl3
Steam Explosions and Steam Condensate Water Hammer
Shafting
Springs
Piping
Boilers
Objective engineering in your world. Call us today at (800) 249-0959.
XCALIBUR calculation files (using MathCad format)are ready to go for you to perform your design calcs! Just like using a white board. Awesome! XCALIBUR has a warehouse of ready to go calculations in MathCad format on:
STEEL CALCS
CONCRETE and FOUNDATION CALCS
TANKS AND VESSELS
LOADINGS
Math is Power! Get paid for your Excel spreadsheets or MathCad files now. Email us at info@mathcadcalcs.com to learn how!
Steel Making Training Tutorial is sponsored by Industrial Training School and AIS Forensic Testing Laboratory.
For training correspondence courses on steel and simular subjects email us at admin@industrial-training.org or visit us at www.industrial-training.org
ETANK2000: The #1 CAE tool for aboveground storage tank design / re-rating / inspection evaluation to API-650, API-620, API-653, & UL-142
AMETank (comming soon): All of the ETANK2000 engineering / code calculations plus Bill of Materials, Fabrication Drawings, and (soon) Estimating.
4611 Broad River Road, Suite I
Forum 
Someone recently told me that if a 24 diameter center pole didnt have mouse hole cutouts in the bottom, there would be a buoyancy issue when the tank was filled. I understand the dynamics and physics of this statement but is it an actual relevant and valid concern when the pole is weighted down by large I-beam rafters and the cone roof material on top of it? Is it more of an issue of applied stresses to the roof and rafter connections, and not an actually worry about the center pole floating out of position?
Buoyancy can throw my head for a loop sometimes, but this is what it looks like to me:
Ive installed centre column 12 pipe on 26m height x 12m dia tank since 1999. So far its been working well and no bouyancy issue.
Industrial Training School and AIS Forensic Testing Laboratory.
