SECTION ____________
WET WELL
PART 1
GENERAL
1.01 SUMMARY
A. This Section includes all Wet Well required for the complete installation of the
work.
1.02 REFERENCES
A. Design, fabricate Wet Well and materials in accordance with manufacturer’s
recommended procedures and the following codes and standards:
1.
ASTM A193
-
Stainless Steel Anchor Bolts
2.
ASTM D 256
-
Izod Impact Strength
3.
ASTM D 570
-
Water Absorption Rate
4.
ASTM D 638
-
Tensile Strength
5.
ASTM D695
-
Compressive Properties of Rigid Plastic
6.
ASTM D 696
-
Coefficient of Linear Expansion
7.
ASTM D 790
-
Flexural Properties
8.
ASTM D792
-
Density and Specific Gravity at 230 C
9.
ASTM D2563-0
-
Visual Defects
10.
ASTM D 2583
-
Indentation Hardness
11.
ASTM D2584
-
Resin, Glass & Filler Content
12.
ASTM D3753-12
-
Polyester Manholes
13.
ISO1438/1-1980
-
Open Channel Flow Measurement
15.
OSHA 1910.27
-
Fixed Ladders
B. Composition of the Wet Well laminate shall be in accordance with the
recommendations shown in the Quality Assurance Report for Reinforced
Thermoset Plastic (RTP) Corrosion Resistant Equipment prepared under the
sponsorship of the Society of the Plastics Industry, Inc. (SPI), and the Material
Technology Institute (MTI) of the Chemical Process Industry for “Hand Lay-Up
Laminates,” and shall meet the specifications for Type I, Grade 10 laminates
shown in Appendix M-1 of said report.
C. Manufacturer shall be experienced in the design and manufacture of specific Wet
Well and accessories for a minimum period of 20 years.
D. Manufacturer must provide warranty for 25 years against failure due to corrosion.
1.03 SUBMITTALS
A. Submit the following for acceptance:
1. Approval Drawings
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ADDRESS - P.O. Box 100 9665 SW Tualatin-Sherwood Rd. Tualatin, Oregon 97062
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a. Showing all critical dimensions.
b. Showing principal parts and materials.
2. Spare parts list (when applicable).
1.04 DELIVERY, STORAGE AND HANDLING
A. Ship all Wet Well with suitable packaging to protect products from damage.
B. Protect Wet Well flanges, tabs and accessories from damage.
C. The Wet Well shall be stored on a smooth flat surface, free of sharp objects, and if
laid horizontally, shall be placed in such a way as to avoid structural damage.
PART 2
PRODUCTS
2.01 MATERIALS
A. Wet Well body shall be:
1. Engineered composite fiberglass reinforced plastic (FRP).
a. Molded in one piece to create a seamless corrosion barrier
impervious to moisture.
b. FRP resin shall be Choose a material
Wet Well Hardware (when applicable): Choose a material
2.02 WET WELL
A. Acceptable Manufacturers:
1. Plasti-Fab Inc.
a. Shall be Model Wet Well as shown on the contract drawings.
2. The Wet Well fabrication, engineering and customer support shall all be
provided by the same company. Outsourcing any of these components
is not acceptable.
3. To assure quality control and single source accountability the same
manufacturer shall fabricate and fully assemble the Wet Well and all
components.
4. Or approved equal. Pre-approved by Engineer at least 10 business days prior
to bid date.
a. Manufacturer must have a qualified Engineer on staff with at least 5
years experience with FRP
2.03 DESIGN CRITERIA
A. Wet Well shall conform to ASTM D3753-12.
B. Composition of the Wet Well laminate shall be in accordance with the
recommendations shown in the Quality Assurance Report for Reinforced
Thermostat Plastic (RTP) Corrosion Resistant Equipment prepared under the
sponsorship the Society of the Plastics Industry, Inc. (SPI) and the Material
Technology Institute of the Chemical Process Industries, Inc. (MTI) for “Hand
Lay-up Laminates” and shall meet the specifications for Type 1, Grade 10
laminates shown in Appendix M-1 of said report.
1. Visual inspection for defects shall be made without the aid of magnification
and defects shall be classified as to type and level as shown in Table 1 of
ANSI/ASTM D2563-0, approved 1977, (or any subsequent revision).
Allowable surface tolerances are as follows
DEFECTS
ALLOWABLE TOLERANCE
Cracks
Crazing
Blisters
None
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ADDRESS - P.O. Box 100 9665 SW Tualatin-Sherwood Rd. Tualatin, Oregon 97062
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Chips
Pits
Dry Spots
Fish Eyes
Burned Areas
Entrapped Air
Wrinkles and solid blisters, not
to exceed 1/8”
Surface porosity (pinholes or
pores in the laminate surface)
Exposed Glass
Exposure of cut edges
Scratches
Foreign Matter
Maximum Deviation: 10% of
thickness
None
None
None more than .002” deep
(.05mm)
None
2.04 CONSTRUCTION
2. Wet Well Each Wet Well shall be a complete integral unit consisting of: a
corrosion resistant fiberglass reinforced plastic (FRP) manhole with
sealed fiberglass bottom, fiberglass access ladder, sump and accessories
as required.
3. Wet Well body shall be totally manufactured of fiberglass reinforced
polyester.
4. Each Wet Well shall be molded individually to the exact dimensions
specified.
5. The thickness of the walls and floor of the Wet Well shall be not less than
1/2" (12mm) thick.
6. Wet Well shall be manufactured of reinforced thermoset plastic in one
integral piece that is structurally strong, lightweight, watertight and
corrosion resistant to salt water, ground water, corrosive soil conditions
and many commonly encountered industrial chemicals.
7. Wet Well shall have UV Stabilizing pigment in the Resin to provide longterm protection from UV.
8. Wet Well inside surface shall be smooth, isophthalic gelcoat of 10 - 20 mil
(0.25 - 0.51mm) thickness. Exterior Surface shall be grey gel coat 15-20
mil (0.25 – 0.51mm) thickness.
9. The surface shall be free of exposed reinforcing fibers.
10. The minimum glass content shall be 30% exclusive of gelcoat surfaces.
11. The manhole sides, bottom and external pipe stubs shall be designed to
withstand a static load of 150 lb/ft per foot (68 kg/305mm) of depth with
less than l/4" (6mm) deflection.
12. There shall be no light duty angles of flanges protruding beyond the
manhole that can be damaged by shear or load forces.
13. Inlet and Outlet Pipes: The FRP manhole shall be provided with pipe stubs
to match connection to I.D. and O.D. of incoming and outgoing pipe.
a. Two neoprene boots with stainless steel clamping bands shall be
supplied and sized to connect inlet and outlet pipe stubs to the
pipeline.
b. Pipe stubs shall have slip flanges for connection to existing line.
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ADDRESS - P.O. Box 100 9665 SW Tualatin-Sherwood Rd. Tualatin, Oregon 97062
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14. Cover
a. The Wet Well will be furnished with a fiberglass cover equipped with
heavy duty stainless steel hinges having l/2" (12mm) diameter
hinge pins and stainless steel hasp for locking. The cover shall be
sufficient strength to withstand 1000 lbs. (454kg) top load. The
cover shall overlap the manhole and seat on a neoprene seal to
prevent dirt, rain and debris from getting into the manhole.
b. The Wet Well shall have a gastight aluminum lid for non-traffic loads
mounted with a 20" / 24" (508mm / 610mm) concentric manway.
c. The Wet Well shall have a concentric manway designed to withstand
a 16,000 lb. (7257kg) vertical dynamic wheel load (H-20), plus
lateral forces from earth loading, ground water and frozen soil. The
manhole opening shall be a (4' (1219mm) diameter barrel use: 221/2" (572mm) I.D or 28" (711mm) I.D. - 5' (1524mm) diameter barrel
use 22-1/2" (572mm) I.D., 28" (711mm) I.D. or 36" (914mm) I.D.)
manway for use with a cast iron cover, suitable for H-20 highway
loading.
d. The Wet Well shall have aluminum hatch access as shown on the
contract drawings
15. Internal Ladder: The ladder rungs shall have a non-slip traction surface and
internal stainless steel safety bar. The ladder shall meet or exceed OSHA
General Industry Standards, Part 1910.27 for "Fixed Ladders".
16. A l/2” (12mm) thick expanded polystyrene bead board will be supplied for
placement on the concrete slab under the manhole.
17. Options
a. Utility Tap: The manhole barrel shall be fitted with a 2" (51mm) FRP
through-wall utility tap(s) having threaded connections to permit
sub-grade entrance for power, sample or recording lines without
damaging the watertight integrity of the manhole.
b. Head deflector / lid warning sign / ladder up with safety track.
2.03 PHYSICAL PROPERTIES
A. Structural characteristics for a 1/8” (3mm) glass mat laminate shall meet the
following minimum physical properties:
Tensile strength
Flexural Modulus
Flexural Strength
Compressive Strength
Impact Strength
Water absorption
15,000 psi (1034 ksc)
1,000,000 psi (70307 ksc)
20,000 psi (1406 ksc)
22,000 psi (1547 ksc)
9.0 ft-lbs/in. (1.24 kgf.m/25mm)
0.13% (in 24 hours)
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ADDRESS - P.O. Box 100 9665 SW Tualatin-Sherwood Rd. Tualatin, Oregon 97062
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2.04 DIMENSIONS
A. Fiberglass barrel shall be Choose Size diameter.
B. Manhole invert to grade as shown on the contract drawings. The fiberglass Wet
Well height from the outlet pipe invert to the top cover (shoulder of the
concentric reducer) as shown on the contract drawings.
PART 3
EXECUTION
3.01 INSTALLATION
A. Verify that dimensions are correct and project conditions are suitable for
installation. Do not proceed with installation until unsatisfactory conditions
have been corrected.
B. Thoroughly clean and remove all shipping materials prior to setting.
C. Install products in accordance with engineer’s specifications, local codes, general
comments below and the Manufacturer’s recommendations.
D. Care shall be taken in the handling, storage and placement of the Wet Well in
preparation for installation. The contractor shall become familiar with the
recommended handling and installation procedures used with fiberglass Wet
Well to insure that the manhole is not damaged, and is installed in a manner
that is consistent with obtaining good sediment, trash and oil retention results.
E. Slinging will be accomplished using nylon or other fabric material. Under no
circumstances shall cable or chain slings be used in direct contact with
fiberglass surfaces
F. The Wet Well shall be installed level end-to-end and side-to-side, and must remain
level throughout installation.
G. The site shall be excavated wide enough to accommodate the manhole and to
provide a safe working environment for workers.
H. The contractor shall provide a level concrete slab with a smooth troweled surface.
Pad elevation shall be as shown on the drawings, and positioned so that the
invert of manhole piping matches that of the pipeline. Prior to manhole
placement the slab shall be cleaned of all sharp objects and debris.
I. The foam pad supplied with the manhole shall be placed in the proper position.
J. If the pipe is already in place the neoprene boots and s/s bands shall be slipped onto
the pipe ends before lowering manhole onto concrete slab. The neoprene boots
can be slipped over pipe ends and the stainless steel clamps tightened securely.
Under no circumstances shall petroleum lubricants of any type be used to install
neoprene boots.
K. Wet Well shall be lowered onto pad in accordance with the manufacturer's written
recommendations.
L. After the level is confirmed all anchor bolts shall be securely tightened.
M. Backfill
1. Care shall be taken to avoid uneven backfill loads on the FRP manhole.
2. Groundwater or surface water runoff shall not be allowed to accumulate in
the open excavation around a manhole that has not been completely
backfilled.
3. Backfill materials shall be placed evenly around the packaged manhole in
approximately 12” (305mm) lifts.
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ADDRESS - P.O. Box 100 9665 SW Tualatin-Sherwood Rd. Tualatin, Oregon 97062
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4. If materials other than pea gravel or sand are to be used as fill there shall be
no soil lumps or sharp objects such as rocks or concrete, or other debris
larger than 1” (25mm) in size.
5. All fill work will be in compliance with local codes, and shall meet the
inspection standards established by the engineer.
6. Stable Soils: Bearing capacity greater than 2000 lbs/ft 2 (186 kg/m2). Native
soil, 1/4" x 3/8" (6mm x 9.5mm) round aggregate gravel or sand shall be
used as backfill material, and placed in accordance with the above
specifications.
7. Unstable Soils and High Water Tables: Bearing capacity less than
2000/lbs/ft2 (186 kg/m2). Sand or 1/4" x 3/8" (6mm x 9.5mm) rounded
aggregate, compacted, shall be used in unstable soils such as expansive
clays, marsh and/or where the water table may be less than 5’ (1524mm).
from finished grade. Selected backfill shall be placed in maximum 12”
(305mm) lifts, a minimum of 24” (610mm) surrounding the manhole, and
compacted to 85% Standard Proctor Density.
8. Finish to Grade: For concentric top, contractor shall finish to grade using
brick and mortar or precast concrete rings to construct chimney of
required height. Mortar bed and first grade ring shall be firmly supported
on flat, bearing shoulder of the packaged manhole.
3.02 ADJUSTMENT AND START UP
A. Check Wet Well for being level both directons and for meeting dimensional
requirements and cleaned per manufacture’s instructions.
B. Site to be left clean and free of any debris.
C. Representative shall complete a Certification of Proper Installation and provide
copies to the Owner, Engineer, Contractor and Manufacturing Facility. (When
applicable)
3.02 FIELD TESTING (OPTIONAL)
A. Qualified Factory representative shall provide (8) hours of training for facility
employees. (Optional)
B. Representative shall complete a Certification of Proper Installation and provide
copies to the Owner, Engineer, Contractor and Manufacturing Facility. (When
applicable)
END OF SECTION
PHONE - 503.692.5460 | FAX - 503.210.0602 | E-MAIL - sales@plasti-fab.com | WEB - www.plasti-fab.com
ADDRESS - P.O. Box 100 9665 SW Tualatin-Sherwood Rd. Tualatin, Oregon 97062
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