An Efficient Contact Tank Design for Potable Water Treatment
Contact Water Tank Design
Transcript of Contact Water Tank Design
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APPLICATION FOR LICENSE TO AUTHORIZE NEAR-SURFACELAND DISPOSAL OF LOW-LEVEL RADIOACTIVE WASTE
Appendix 4.2.3: Technical Specif ications
Steel Tanks
22 12 00 – Page 1 of 1
March 16, 2007 4.2.3 Revision 12a
SECTION 22 12 00
STEEL TANKS
PART 1: GENERAL
1.1 DESCRIPTION
A. The selection of factory-coated welded steel tank
construction for this facility is based upon the design
drawings and this specification. Deviations from thespecified design are not permitted.
B. Drawings and Specifications
1. Supply and install steel tanks at the location shown
on the drawings and as specified herein.
2. Shop drawings shall be submitted for approval as
specified elsewhere.
C. Qualifications of Tank manufacturer
1. The Tank manufacturer shall be a specialist in the
design, fabrication, and erection of factory-coated
welded steel tanks. The manufacturer shall bequality certified, have an active American
Petroleum Institute (API-QI) and an International
Organization for Standardization (ISO 9001)registration.
D. Processing pipe, instrumentation, and controls is included
as part of the steel tank installation. The tank contractor is
responsible for installation of these systems in accordancewith manufacturer’s specifications.
E. Design Criteria
Product to be Stored: Water incident to site runoff,
dewatering, and decontaminationactivities.
Specific Gravity: 1.0
pH of Product: 6.7 to 7.8Temperature of Product: Ambient
Maximum Capacity: 500,000 Gallons/ea. tankDiameter: 60 FeetMaximum Depth: 24 Feet
Minimum Freeboard: 2 inches
Design Pressure: Atmospheric
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APPLICATION FOR LICENSE TO AUTHORIZE NEAR-SURFACELAND DISPOSAL OF LOW-LEVEL RADIOACTIVE WASTE
Appendix 4.2.3: Technical Specif ications
Steel Tanks
22 12 00 – Page 2 of 2
March 16, 2007 4.2.3 Revision 12a
Deck Live Load: 25 PSF
Wind Speed: 100 MPH, When completelyerected
Seismic Zone: Zone 1 per API 650, Appendix
E, Addendum 3, Sept 2003
1.2 RELATED SECTIONS
Not Used
1.3 SUBMITTALS
A. A tank construction certification and shop drawings withaccompanying calculations prepared and submitted by a
professional Engineer licensed in the state of Texas shall be
submitted by the tank supplier. These documents will be
part of the Construction Certification Report
1.4 REFERENCES
A. API 650 – Welded steel tanks for oil storage.
B. AISC – “Manual of Steel Construction”, 9th
Edition –
Allowable Stress Design.
C. AWS Standard
PART 2: PRODUCTS
2.1 MATERIALS
A. Tank Structure
The materials, design, fabrication, and erection of thewelded steel tank shall conform to the standards of industry
from the American Petroleum Institute, which are derived
from Engineering principles, industry experiences, and
standards and specifications.
1. Steel
a. Sheet. Steel sheets shall conform to or shall be at
least equal to hot-rolled quality per ASTM
A36M/A36 with a minimum yield strength of36,000 psi.
b. Plate. Steel plates shall conform to or at least beequal to the requirements of ASTM A36M/A 36,
with minimum yield strength of 36,000 psi.
c. Rolled Structural Shapes. Rolled structural shapesshall conform to ASTM A36.
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APPLICATION FOR LICENSE TO AUTHORIZE NEAR-SURFACELAND DISPOSAL OF LOW-LEVEL RADIOACTIVE WASTE
Appendix 4.2.3: Technical Specif ications
Steel Tanks
22 12 00 – Page 3 of 3
March 16, 2007 4.2.3 Revision 12a
2. Bolts
a. Bolts shall conform to or at least be equal to the
latest revision of ASTM A307 or A 193M/A 193.
b. Fastener bolts in flanges and structural steel
members shall be friction type, A325.
3. Welding Electrodes
a. Manual arc-welding electrodes, for weldingmaterials with a minimum tensile strength less than
550 MPa (80 ksi), shall conform to the E60 and E70
classification series in AWS A5.1 and shall conformto the E8015-B8 classification series in AWS A5.5.
b. Welding materials with a minimum tensile strength
of 550 through 585 MPa (80 through 85 ksi), the
manual arc-welding electrodes shall conform to theE8015-B8 classification series in AWS A5.5.
c. Inspections of joints shall be either radiographic or
ultrasonic methods as described in API 650, Section
6 – Methods of Inspecting Joints.
4. Joints
a. All welded joints shall conform to API 650, Section
3 – Design.
5. Coating
a. All metal plates, supports, members, andmiscellaneous parts, except bolts, certainaccessories, and appurtenances, shall be factory
coated in accordance with the provisions of these
specifications. Field coating, is required for weldsand to repair damage caused by welding.
Interior: Thermally cured epoxy Epicon 925, or
equal.
Exterior: Amine Epoxy primer with baked acrylic
finish coat or equal.
2.2 ACCEPTED TANK SUPPLIER
The steel tank and accessories furnished under this section shall besupplied by Pasadena Tank Corporation, 1591 Jacinto Port
Boulevard, Houston, Texas 77015 (281-457-3996), or approved
alternate.
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APPLICATION FOR LICENSE TO AUTHORIZE NEAR-SURFACELAND DISPOSAL OF LOW-LEVEL RADIOACTIVE WASTE
Appendix 4.2.3: Technical Specif ications
Steel Tanks
22 12 00 – Page 6 of 6
March 16, 2007 4.2.3 Revision 12a
g. Liquid Level Indicator. Install a liquid level
indicator with stainless steel float and target board as detailed on the drawings and as
specified by the tank manufacturer.
h. Internal Nozzle with Overflow Weir Cone.The internal nozzle with overflow weir shallconform to the size and location specified on
the drawings.
i. Flush Cleanout Door. The flush cleanoutdoor (shell manway) shall conform to the
sizes and location specified on the drawings.
j. Processing pipe, instrumentation, and
controls is included as part of the steel tankinstallation. The tank contractor is
responsible for installation of these systemsin accordance with manufacturer’sspecifications.
D. Tank Foundation
1. The tank foundation is specified elsewhere.
2. Steel Bottom Tanks. The foundation shall be
installed per API 650.
3. The foundations shall be level with differential notexceeding +/- 1/8 inch in any 30-foot circumference
under the shell. The grade on the circumference
shall not vary more than +/- ¼ inch from anestablished plane.
4. Concrete used for foundations shall be 4000 psi
compressive strength (Type I Portland Cement).
5. Soil reports are required for foundation designs.
E. Shipping
1. Package all plates, supports, members, andmiscellaneous parts for shipment in such manner to
prevent abrasion or scratching of the finished
coating.
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