ST0701-SP080522
(8/30/2011) Keith Marvin - Fwd: Southwestern Blvd. 24" Water RelocationPage 1
From: Keith Marvin
To:Dutt, Ted; Hollowell, Glenn
CC:Griffin, Ken
Date: 5/22/2008 9:23 AM
Subject: Fwd: Southwestern Blvd. 24" Water Relocation
Attachments:24732 SEC02570 Bar Wrapped CC Pipe.doc
Gentlemen,
Please look over the attached specification for concrete cylinder pipe. The plans showing the 3 locations where this pipe is
proposed to be relocated are in our office. I plan to meet with this design engineer by the end of next week (5/30/08) to
discuss any comments we may have on this project.
I would appreciate it if you could give me some feedback prior to that time.
Thanks,
Keith
>>> "Smith, Madonna" <msmith@Halff.com> 5/21/2008 5:25 PM >>>
Keith,
The Southwestern Blvd. plans (west side of Grapevine Creek) should have
been delivered to you this afternoon. Attached are specifications for
24" Bar Wrapped Concrete Cylinder Pipe that I've used on previous
projects. If the City has specs you'd prefer we use, please send them
to me and I'll look them over. Otherwise, I'd like to use these.
Let me know if you have questions.
Thanks,
Madonna
Madonna Smith, P.E.
Project Manager
HALFF ASSOCIATES, INC.
1201 N. Bowser Road
Richardson, Texas 75081
Phone 214-217-6688
Fax 214-739-0095
www.halff.com
SECTION 02570 – BAR-WRAPPED STEEL CYLINDER CONCRETE PRESSURE PIPE AND
FITTINGS
PART 1 -- GENERAL
1.1THE REQUIREMENT
The CONTRACTOR shall provide and install bar-wrapped, steel cylinder, concrete
A.
pressure pipe, complete in place, in accordance with AWWA C303 and the Contract
Documents.
A single pipe manufacturer shall be made responsible for furnishing all the bar-wrapped
B.
steel cylinder concrete pressure pipe, smaller diameter appurtenant steel pipe as
required by the Contract Documents.
1.2REFERENCE SPECIFICATIONS, CODES AND STANDARDS
North Central Texas Council of Governments Standard Specifications for Public Works
Construction, Fourth Edition, 2004 – Section 501.4.6 CONCRETE PRESSURE PIPE
AND FITTINGS, AWWA C303 - CONCRETE PRESSURE PIPE, BAR-WRAPPED
STEEL CYLINDER TYPE, and all specifications and standards referenced therein.
1.3CONTRACTOR SUBMITTALS
Shop Drawings: The CONTRACTOR shall submit a minimum of six (6) copies of pipe
A.
Shop Drawings to ENGINEER for review and approval, in accordance with the
requirements set forth below:
Pipeline layout - Layout and marking diagrams shall indicate the specific number
1.
of each pipe and fitting and the location of each pipe and the direction of each
fitting in the completed line. In addition, the line layouts shall include: the station
and invert elevation to which the bell end of each pipe will be laid; all elements of
curves and bends, both in horizontal and vertical alignment; and the limits within
each reach of restrained and/or welded joints or of concrete encasement. The
location of all mitered pipe sections and beveled ends for alignment conformance
shall be clearly indicated on the diagrams.
Certified dimensional drawings of all pipe, joints, fittings, and specials. Drawings
2.
shall indicate the type and thickness of cylinder; the position, type, size, and area
of wire or other reinforcement, manufacturing tolerances, maximum angular joint
deflection limitations, and all other pertinent information required for the
manufacture and installation of the product. Joint details and design calculations
shall be submitted for all welded joint types, including beveled ends for alignment
conformance.
Rubber gasket joint design and details, complete with dimensions, tolerances, and
3.
performance or test data.
CONTRACTOR shall submit design calculations for pipe and fitting
4.
reinforcements.
Manufacturer shall submit an affidavit of compliance
5.
1.3QUALITY ASSURANCE
Pipe Manufacturer Qualifications: The manufacturer or fabricator of the pipe shall be
A.
certified by the Steel Plate Fabricator’s Association (SPFA) or Lloyd’s Register Quality
02570-1
Assurance Limited (LRQA) and shall be experienced in fabrication of AWWA C303 pipe
of similar diameters, lengths, and wall thicknesses to this WORK.
Inspection: All pipe, linings, welds and related work shall be subject to inspection at the
B.
place of manufacture and/or the place the Work is performed in accordance with the
provisions of all referenced specifications as supplemented by the requirements herein.
Tests: Materials used in the manufacture of the pipe shall be tested in accordance with
C.
the requirements of ANSI/AWWA C303, and C206 as applicable.
The CONTRACTOR shall be responsible for performing and paying for said material
tests. The ENGINEER and OWNER shall have the right to witness all testing
conducted by the CONTRACTOR, provided that the CONTRACTOR'S schedule is not
delayed for the convenience of the ENGINEER or OWNER.
In addition to those tests specifically required, the ENGINEER may request additional
samples of any material including mixed concrete and lining and coating for testing by
the OWNER. The additional samples shall be furnished as part of the WORK.
Field testing shall conform to the requirements of ANSI/AWWA C303.
PART 2 -- PRODUCTS
2.1GENERAL
Manufacture of bar-wrapped steel cylinder pipe and fittings shall be under the direction
A.
and management of one pipe supplier only. This does not prevent a separate supplier
from manufacturing specials or fittings; however, all Work shall be directed by the
supplier of the raw water piping (Main Pipe Supplier). The responsibility of the Main
Pipe Supplier shall include, at a minimum:
Ensure all pipe, fittings, and specials are being manufactured in full accordance
1.
with the Drawings and Specifications.
Manage the design and fabrication of the pipe and specials.
2.
Prepare and submit all submittal information and shop drawings.
3.
Make any corrections that may be required to the submittal information and shop
4.
drawings.
Certify that the pipe and specials have been manufactured in accordance with the
5.
Specifications and Drawings.
Bar-wrapped steel cylinder pipe and fittings shall conform to ANSI/AWWA C303, C206
B.
and C207 subject to the following supplemental requirements. The pipe shall be of the
diameter and wall thickness indicated, shall be furnished complete with rubber gaskets
or welded joints as indicated in the Contract Documents. The nominal inside diameter
after lining shall not be less than the diameter shown on the Drawings, allowing for
tolerances according to ANSI/AWWA C303.
02570-2
Markings: The manufacturer shall legibly mark all pipes and specials in accordance
C.
with the laying schedule and marking diagram. Each pipe shall be numbered in
sequence and said number shall appear on the laying schedule and marking diagram in
its proper location for installation. All pipe sections and fittings shall be marked at each
end with top field centerline. The word “top” shall be painted or marked on the outside
top spigot of each pipe section.
Handling and Storage: The pipe shall be handled accordance to referenced
D.
specifications in a manner to prevent damage to the pipe coating/exterior. The use of
chains, hooks, or other equipment which might injure the pipe coating/exterior will not
be permitted. Stockpiled pipe shall be suitably supported and shall be secured to
prevent accidental rolling and to avoid contact with mud, water, or other deleterious
materials and to prevent damage to the mortar coating. The ends of all pipe shall be
securely bulkheaded or otherwise sealed during transport to the jobsite. The ends of
the pipe shall remain sealed until pipe installation. The pipe shall not be rolled, and
shall be secured to prevent accidental rolling.
The CONTRACTOR shall replace or repair damaged pipe.
E.
Closures and Correction Pieces: Closures and correction pieces shall be provided as
F.
required so that closures may be made due to different headings in the pipe laying
operation and so that correction may be made to adjust the pipe laying to conform to
pipe stationing indicated. The locations of correction pieces and closure assemblies
shall be shown on the pipe layout drawings and shall be subject to the ENGINEER’s
review. Any change in location or number of said items shall be approved by the
ENGINEER.
2.2MATERIALS
Pipe from inventory may be furnished if it meets the requirements of these contact
A.
documents and referenced specifications. The appropriate certification is required.
Materials used for pipe manufactured under ANSI/AWWA C303 shall satisfy these
B.
contract documents and referenced specifications.
Repair of Defects: Patching inserts, overlays, or pounding out of dents will not be
C.
permitted. Repair of notches or laminations on second ends will not be permitted.
Damaged ends shall be removed as a cylinder and the end properly prepared.
Distorted or flattened lengths shall be rejected. A buckled section shall be replaced as
a cylinder.
2.3SPECIALS AND FITTINGS
Unless otherwise required by the Contract Documents, all specials and fittings shall be
A.
in accordance with ANSI/AWWA C303 and C207.
2.4DESIGN OF PIPE
General: The pipe shall be designed in accordance with AWWA Manual M9, Manual of
A.
Water Supply Practices, Concrete Pressure Pipe.
02570-3
The pipe shall be manufactured, tested, inspected, and marked according to applicable
B.
requirements previously stated, and, except as hereinafter modified, shall conform to
ANSI/AWWA C303.
Design Parameters
C.
Pipe design shall include the following parameters:
Working pressure of 150 psi and a maximum pressure of 225 psi.
1.
3
Soil dry unit weight of 120 lb/ft
2.
Live load: AASHTO HS20
3.
¾-inch Mortar coating thickness
4.
The pipe shall be designed to withstand full internal vacuum (0 psia).
D.
Pipe Dimensions: The pipe shall be of the diameter and minimum wall thickness shown
E.
on the Drawings. Unless shown otherwise, the diameter shall be considered the
finished diameter after lining.
Joint Design shall be per ANSI/AWWA C303 and M9. Welded joints shall be provided
F.
where restrained joints are indicated. The joints furnished shall have the same or
higher pressure rating as the adjoining pipe.
2.5PIPELINE MARKING TAPE
Metallic Tape: Tape shall be minimum 5.5 mils thick aluminum foil imprinted on one
A.
side, encased in high visibility inert polyethylene jacket. Tape shall be 6 inches wide.
Imprinted lettering shall be 1-inch tall, permanent black, and shall read “WATER LINE
BURIED BELOW.” Joining clips shall be manufacturer’s standard tin or nickel coated.
Tape shall be as manufactured by Reef Industries (Terra “D”), Allen (Detectatape), or
equal.
Plastic Tape: Tape shall be minimum 4 mil thick polyethylene which is impervious to
B.
alkalis, acids, and chemicals and solvents which are likely in the soil. Tape shall be 6
inches wide. Imprinted lettering shall be 1-inch tall, permanent black on a blue
background, and shall read “WATER LINE BURIED BELOW.” Joining clips shall be
manufacturer’s standard tin or nickel coated. Tape shall be as manufactured by Reef
Industries (Terra Tape), Allen (Markline), or equal.
PART 3 – EXECUTION
3.1INSTALLATION OF PIPE
Handling and Storage: All pipe, fittings, and specials shall be carefully handled and
A.
protected against damage to lining and coating/interior and exterior surfaces, impact
shocks, and free fall. All pipe handling equipment shall be acceptable to the
ENGINEER.
All pipe damaged prior to Substantial Completion shall be repaired or replaced.
B.
The CONTRACTOR shall inspect each pipe and fitting to insure that there are no
C.
damaged portions of the pipe. The CONTRACTOR shall remove or smooth out any
burrs, gouges, weld splatter, or other small defects prior to laying the pipe.
02570-4
Before placement of pipe in the trench, each pipe or fitting shall be thoroughly cleaned
D.
of any foreign substance which may have collected thereon and shall be kept clean at
all times thereafter. For this purpose, during any interruption to the WORK, the
openings of all pipes and fittings in the trench shall be closed with a manufactured plug.
Pipe shall be laid directly on the imported bedding material. No blocking will be
E.
permitted, and the bedding shall be such that it forms a continuous, solid bearing for
the full length of the pipe. Excavations shall be made as needed to facilitate removal of
handling devices after the pipe is laid. Bell holes shall be formed at the ends of the
pipe to prevent point loading at the bells or couplings. Excavation shall be made as
needed outside the normal trench section at field joints to permit adequate access to
the joints for field connection operations and for application of coating on field joints.
Installation Tolerances: Each section of pipe shall be laid in the order and position
F.
shown on the line layout and marking diagrams and in accordance with the following:
Each section of pipe shall be laid to line and grade, within plus or minus 0.25 foot
1.
horizontal deviation and plus or minus 0.10 foot vertical deviation.
In addition to the horizontal and vertical tolerances above, lay the pipe so that no
2.
high or low points other than those on the laying diagram are introduced. To
prevent high points or low points along the pipeline, the general slope of the
pipeline shall not be changed between vertical angle points.
When pipe is to be connected to existing pipe, the terminus of the existing pipe
3.
shall be field located prior to installing new pipe.
The CONTRACTOR shall submit any required alignment adjustments to the
4.
ENGINEER for approval. The CONTRACTOR shall make any required field
alignment adjustments to allow proper fitup of pipe in conformance with tolerances
specified.
Where necessary to raise or lower the pipe due to unforeseen obstructions or other
G.
causes, the ENGINEER may change the alignment and/or the grades. Such change
shall be made by the deflection of joints, by the use of bevel adapters, or by the use of
additional fittings. However, in no case shall the deflection in the joint exceed 75
percent of the maximum deflection recommended by the pipe manufacturer or the
amount that results in more than a 1/8-inch gap at the weld location, whichever is less.
No joint shall be misfit any amount which will be detrimental to the strength and water
tightness of the finished joint. In all cases the joint opening, before finishing with the
protective mortar inside the pipe, shall be the controlling factor.
Except for short runs which may be permitted by the ENGINEER, pipes shall be laid
H.
uphill on grades exceeding 10 percent. Pipe which is laid on a downhill grade shall be
blocked and held in place until sufficient support is furnished by the following pipe to
prevent movement. Bends shall be properly installed as indicated.
Cold Weather Protection: No pipe shall be installed upon a foundation into which frost
I.
has penetrated or at any time that there is a danger of the formation of ice or
penetration of frost at the bottom of the excavation. No pipe shall be laid unless it can
02570-5
be established that the trench will be backfilled before the formation of ice and frost
occurs.
Pipe and Specials Protection:
J.
The openings of all pipe and specials where the pipe and specials have been
1.
cement-mortar lined in the shop shall be protected with suitable bulkheads to
maintain a moist atmosphere and to prevent unauthorized access by persons,
animals, water, or any undesirable substance. The bulkheads shall be so
designed to prevent drying out of the interior of the pipe. The CONTRACTOR
shall introduce water into the pipe to keep the mortar moist where moisture has
been lost due to damaged bulkheads. At all times, means shall be provided to
prevent the pipe from floating due to water in the trench from any source. Pipe
which has floated shall be repaired, including restoration to original condition and
profile.
At locations where the CONTRACTOR proposes to cross the installed pipeline
2.
with heavy equipment, precautions as approved by the ENGINEER shall be taken
to protect the pipe from damage. Acceptable precautions include: backfilling the
pipe trench as necessary to protect the pipe, concrete encasing the pipe, and
placing steel plating over the pipe. Any damage to the pipe caused by the
CONTRACTOR’s operation or his equipment shall be repaired to the ENGINEER’s
satisfaction.
Pipe Cleanup: As pipe laying progresses, the CONTRACTOR shall keep the pipe
K.
interior free of all debris. The CONTRACTOR shall completely clean the interior of the
pipe of all sand, dirt, mortar splatter, and any other debris following completion of pipe
laying, pointing of joints, and any necessary interior repairs prior to testing the
completed pipeline.
Hydrostatic Testing of Pipe: Once installed, the pipe shall be hydrostatically tested in
L.
accordance with ANSI/AWWA C303.
3.2RUBBER GASKETED JOINTS
Rubber Gasketed Joints: Immediately before jointing pipe, the spigot end of the pipe
A.
shall be thoroughly cleaned, and a clean rubber gasket lubricated with a non-toxic
vegetable-based lubricant shall be placed in the spigot groove. The lubricant shall be a
compound listed as in compliance with NSF Standard 61. The volume of the gasket
shall be "equalized" by moving a metal rod between the gasket and the spigot ring
around the full circumference of the spigot ring. The bell of the pipe already in place
shall be carefully cleaned and lubricated with the vegetable-based lubricant. The spigot
of the pipe section shall then be inserted into the bell of the previously laid joint and
telescoped into its proper position. Tilting of the pipe to insert the spigot into the bell
will not be permitted. After the pipe units have been joined, a feeler gage shall be
inserted into the recess and moved around the periphery of the joint to detect any
irregularity in the position of the rubber gasket. If the gasket cannot be "felt" all around,
the joint shall be disassembled. The joint shall be reassembled with a new gasket.
3.3WELDED JOINTS
General: Field welded joints shall be in accordance with ANSI/AWWA C303.
A.
02570-6
Repair of Welds: Welds that are defective shall be repaired by the CONTRACTOR to
B.
meet the requirements of the applicable sections of these specifications. Defects in
welds or defective welds shall be removed, and that section of the joint shall then be
rewelded. Only sufficient removal of defective material that is necessary to correct the
defect is required. After the repair is made, the joint shall be checked by repeating the
original test procedure. Welds deficient in size shall be repaired by adding weld metal.
3.4JOINT COATING AND LINING
General: The interior and exterior joint recesses shall be thoroughly wiped clean and
A.
all water, loose scale, dirt, and other foreign material shall be removed from the inside
surface of the pipe. The grout for joint coating and lining shall be cement grout in
accordance with AWWA C205, except that composition shall be one part cement to two
parts sand and sufficient water for dry-pack consistency.
Joint Lining: After the backfill has been completed to final grade, the interior joint
B.
recess shall be filled with grout. The grout shall be tightly packed into the joint recess
and troweled flush with the interior surface. All excess shall be removed. At no point
shall there be an indentation or projection of the mortar exceeding 1/16-inch.
3.5INSTALLATION OF PIPE APPURTENANCES
Insulated Joints: Insulated joints and appurtenant features shall be made by the
A.
CONTRACTOR as indicated. The CONTRACTOR shall exercise special care when
installing these joints to prevent electrical conductivity across the joint. After the
insulated joint is completed, an electrical resistance test shall be performed by the
OWNER or ENGINEER. Should the resistance test indicate a short circuit, the
CONTRACTOR shall remove the insulating units to inspect for damage, replace all
damaged portions, and reassemble the insulating joint. The insulated joint shall then be
retested to assure proper insulation.
Wrenches used in bolting couplings shall be of a type and size recommended by the
B.
coupling manufacturer. Coupling bolts shall be tightened so as to secure a uniform
annular space between the follower rings and the body of the pipe with all bolts
tightened approximately the same amount. Diametrically opposite bolts shall be
tightened progressively and evenly. Final tightening shall be done with a suitable,
approved, and calibrated torque wrench set for the torque recommended by the
coupling manufacturer. Clamping torque shall be applied to the nut only. Upon
completion of the coupled joint, the coupling and bare metal of the pipe shall be
cleaned, primed, and protected in accordance with the requirements of North Central
Texas Council of Governments Standard Specifications for Public Works Construction,
Fourth Edition, 2004, and City of Coppell Standard Construction Details (2006).
3.6MARKING TAPE INSTALLATION
Continuously install marking tape along the pipe at a depth 2 feet above the top of pipe,
A.
unless otherwise shown on the Drawings, in accordance with the recommendations and
instructions of the marking tape manufacturer.
- END OF SECTION -
02570-7