slide1
Download
Skip this Video
Download Presentation
Above Ground Storage Tanks & Tank Base Sealing

Loading in 2 Seconds...

play fullscreen
1 / 29

Above Ground Storage Tanks & Tank Base Sealing - PowerPoint PPT Presentation


  • 225 Views
  • Uploaded on

Above Ground Storage Tanks & Tank Base Sealing. Tank Base Sealing Types of Tank. Fixed Roof Tanks. - Least Expensive to construct For storing “Low Vapour Pressure” Products ( below 2 psi. ). Tank Base Sealing Types of Tank. Fixed Roof Tanks Least Expensive to construct

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Above Ground Storage Tanks & Tank Base Sealing' - anika


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide2

Tank Base Sealing Types of Tank

Fixed Roof Tanks

  • - Least Expensive to construct
  • For storing “Low Vapour Pressure”
  • Products ( below 2 psi. )
slide3

Tank Base Sealing Types of Tank

  • Fixed Roof Tanks
  • Least Expensive to construct
  • For storing “Low Vapour Pressure”
  • Products ( below 2 psi. )

Floating Roof Tanks

  • - To prevent evaporation loss
  • More expensive to build and maintain
slide4

Tank Base Sealing Types of Tank

  • Fixed Roof Tanks
  • Least Expensive to construct
  • For storing “Low Vapour Pressure”
  • Products ( below 2 psi. )
  • Floating Roof Tanks
  • To prevent evaporation loss
  • More expensive to build and maintain

Silos

  • - Ash (Fly ash)
  • - Used for Storing “dry” products
  • Variety of construction materials
tank base sealing tank base construction1
Tank Base SealingTank Base Construction

Large Tanks

1. Trench preparation for perimeter wall

2. Reinforced concrete containment wall

1

3. First sections of tank wall positioned

Large Storage Tanks – Typical Construction

3

2

2

3

slide7

4

6

5

Tank Base SealingTank Base Construction

Large Tanks

4. Liner installed when required

5. Sand – bitumen foundation laid

6. Tank base installed

slide8

Tank Base SealingTank Base Construction

Large Tanks

7. Walls constructed

8. Roof welded in place

7

9. Tank completion

9

8

9

8

slide9

Tank Base SealingTank Base Construction

Small Tanks

1. Foundations prepared

2. Base and plinths constructed

1

3. Tanks installed

3

2

slide10

Tank Base SealingProblem Areas – Tank Base

  • Corrosion of tank wall and chine angle
  • Determination seal
  • Corrosion of tank base
slide11

Tank Base SealingProblem Areas – Tank Base

Conventional methods to seal tank base

slide15

Chine Angle

Tank Base SealingProblem Areas – Tank Base

Corrosion at the Chine Angle

  • Failure of Bitumen Seal

- Corrosion of wall / base / metal thinning

  • - Contents to be emptied
  • Tank requires to be gas free – man entry
  • Sludge needs to be removed / disposed of

- Tank needs to be lifted up

slide16

Tank Base SealingProblem Areas – Tank Base

  • Corrosion at the Chine Angle
  • Tank needs to be cut open for plate entry
  • New base needs to be built
  • Base welded into position
  • Hydro Test needs to be conducted
  • Approx. Costs ( 90 foot tank )
  • $40,000 for cutting and entry / base removal
  • $8,000 for sand-bit floor screed replacement
  • $10,000 for flexible liner
  • $40,000 for new bottom plates
  • $100,000 for inspection and Hydro Test
  • --------------
  • $198,000
  • Plus :
  • Tank cleaning / waste disposal costs
  • Tank out of service for 3 months
slide17

Tank Base Sealing

Storage Tank Base Associated Problems

No grout or sealing measures

Failed grout

tank base sealing
Tank Base Sealing

Conventional wisdom states:

Replace failed system with more of the same sealants

Replace failed system with similar sealants

Switch sealing system to other conventional sealing methods

slide20

Tank Base Sealing

unconventional

PROVEN ^ LONG TERM, COST EFFECTIVE

SOLUTIONS ARE AVAILABLE

tank base sealing1
Tank Base Sealing

Membrane systems for long term sealing of chine angle

Epoxy grouts for concrete ring repair and grout sealing

Urethane coatings for tank exterior

tank base sealing key features and benefits
Tank Base SealingKey Features and Benefits
  • Weatherproof & Waterproof - Prevents ingress of water and provides long term corrosion protection
  • Seamless Encapsulant – Seals around irregular contours and is easily repaired if accidentally damaged
slide23

Tank Base SealingKey Features and Benefits

  • Maintains High Adhesion – Ensuring long service life
  • Fire Resistant Systems Available
  • Flexible & UV Resistant – Long lasting and tolerant of movement through climatic variations unlike conventional sealants
slide24

Tank Base SealingKey Features and Benefits

  • Durable & Tough – Long lasting and tolerant of industrial environments
  • Microporous – Allows trapped moisture to escape
  • Cold Applied – No hot work required ensuring safety in use where fire is a concern
slide25

Tank Inspection Requirements

API 653 ( American Petroleum Institute )

BS 2654 ( British Standard )

EEMUA 159 ( Engineering an Equipment

Materials Users Association )

PA DEP 245 (Department of Environmental Protection)

Requirement for all Tank users to

Inspect and ensure integrity of

their Structures

Frequency :

1 Year visual / 5 Year integral

slide26

Storage Tank Containment Issues

Before repair/coating

After repair/coating

tank base sealing2
Tank Base Sealing

Maintain environmental compliance

Maintain asset integrity

Minimize headaches with preventative maintenance

slide29

Thank You

for your time.

ad