CHEMICAL TANK SPECIFICATIONS


UNDERGROUND FIBERGLASS STORAGE TANKS


Short Form Specifications
The contractor shall provide the appropriate underground fiberglass storage tank and/or any optional accessories as indicated on tank drawings. Capacity, dimensions, and fitting locations and sizes will also be indicated on tank drawings. The tank will be as manufactured by Containment Solutions, Inc. The tank will be installed according to manufacturer’s current installation instructions.

 

Long Form Specification

Part I: General

1.01 Quality Assurance

    A. Acceptable Manufacturers: Containment Solutions, Inc., Conroe, Texas

    B. Manufacturing Standards: Tank manufacturer shall be recognized and listed by UL to manufacture tanks to UL 1316 standard.

    C. Materials: The tank shall be manufactured from a matrix of premium resin, glass fibers and silane-treated silica that together result in a composite matrix compatible with chemcial products.

1.02 Submittals:

    Contractor shall submit to engineer ___ copies of shop drawings for each tank and ___ copies of manufacturer’s literature (including installation instructions).

 

Part II: Products

2.01 Double-Wall Fiberglass Underground Tanks

    A. Product-Storage Requirements:

    1. All primary tanks must be vented. Tanks are designed for operation at atmospheric pressure only.
    2. Tanks shall be capable of storing chemicals not to exceed 180°F at the tank interior surface (dependent on chemical to be stored).

    B. Loading Conditions - Tanks shall meet the following design criteria:

    1. External hydrostatic pressure: Buried in ground with 7' of over burden over the top of the tank, the hole fully flooded and a safety factor of 5:1 against general buckling.
    2. Surface Loads: When installed according to manufacturer’s current installation instructions, tanks will withstand surface H-20 axle loads (32,000 lbs./axle).
    3. Internal Load: Primary and secondary tanks shall withstand 5 psi air pressure test with 5:1 safety factor.
    4. Tanks shall be designed to support accessory equipment such as heating coils, ladders, drop tubes, etc. when installed according to manufacturer’s recommendations and limitations.
    5. Tank laminate shall include silica treated with silane.

    C. Interstitial Space: In all double-wall and triple-wall tanks, there shall be a space between the primary and secondary walls to allow for the free flow and containment of any leaked product from the primary tank. The space shall also allow room for the insertion of a monitoring device.

2.02 Accessories

    A. Anchor Straps:

    1. Straps shall be standard as supplied by tank manufacturer.
    2. Provide glass fiber reinforced plastic anchor straps for each tank shown.
    3. Number and location of straps shall be as specified by manufacturer.

    B. Flanged Manways: (Required for all potable water tanks)

    1. The standard manway is 22" ID, which is supplied by the manufacturer (30" and 36" manways are optional).
    2. All manways will be furnished complete with gaskets, bolts and covers.
    3. Location(s) shall be indicated on tank drawings.
    4. Optional manway extensions shall be fiberglass.

    C. Fill Tubes: Fill tubes of appropriate design will be supplied by contractor.

    D. Tank Bottom Deflector Plates: Plates will be installed under each service fitting and manway opening.

    E. Ladders: Ladders shall be the standard ladder supplied by the tank manufacturer (fiberglass, stainless steel, aluminum). Refer to drawings for locations.

    F. Internal Pump Platform: Contact manufacturer for details.

    G. Fittings Threaded – NPT:

    1. All threaded fittings on tanks shall be located in a manway lid or on the tank shell wall.
    2. All fittings are to be supplied with fitting plugs.
    3. All standard threaded fittings to the primary tank and monitoring cavity are 4" in diameter. The standard secondary containment coupling is 6" in diameter.
    4. All standard threaded fittings are half couplings. Reducers can be used for smaller sizes where specified and provided by the contractor.

    H. Fittings – FRP gusseted nozzles:

    1. All FRP nozzles will be supplied with flat-faced flanges and bolt pattern in accordance with ANSI B165, Class 150.

 

Part III: Execution and Installation

3.01, 3.02 Installation and Testing

    Tanks shall be tested and installed according to the current installation instructions provided with the tank.

 

Copyright © 1999 Containment Solutions, Inc.