CHAPTER  1300.  Pipe Materials.

 

 1301. Concrete Pipe.

 

(1)        Concrete Sewer Pipe may be used for all sanitary sewers and storm drains 8" up to and including 18 inch size unless otherwise specifically designated in these specifications or on the approved drawings.  Pipe shall be strength pipe manufactured to comply with the requirements as set forth in ASTM Designation C‑14, Class II unless otherwise noted on the plans or in the proposal.  Joints shall be of the bell and spigot rubber gasket design with joints and gaskets conforming to the requirements of ASTM Designation C‑443. Pipe joints shall be so designed as to provide for self‑ centering, and when assembled, to compress the gasket to form a water‑tight seal.  The gasket shall be confined in a groove on the spigot, so that pipe movement or hydrostatic pressure cannot displace the gasket.

 

(2)        Reinforced concrete pipe shall be used for all sanitary sewers and storm drains of size larger than 18 inches and for all sewers and drains of smaller size where installation does not provide a cover of at least three feet over the top of the pipe.  All reinforced concrete storm drain pipe used in the construction shall be of the rubber gasket type, bell and spigot joint design, conforming to the requirements of the latest revision of ASTM Designation C‑76.  Pipe class shall be as shown on the drawings.  The minimum joint length of all pipe provided shall be seven and one‑half feet.

 

 1302.  Plastic Sewer Pipe.

 

(1)        This specification covers rigid polyvinyl chloride pipe and pipe and fittings shall meet or exceed all of the requirements of ASTM Specification D‑3034.

 

(2)        Samples of pipe, physical and chemical data sheets, may be required to be submitted to the engineer for approval and approval may be required before the pipe is purchased.

 

(3)        This pipe shall be homogeneous throughout and free from cracks, holes, foreign inclusions or other defects.  The pipe shall be as uniform as commercially practical in color.

 

(4)        All PVC sewer pipe shall be made from clean, virgin, Type 1, Grade l, PVC conforming to ASTM resin specification D‑1784.  All pipe joints shall be bell and spigot type with rubber ring gasket to permit expansion and contraction. Pipe and fittings must be assembled with a non-toxic lubricant.  Four inch and six inch diameter pipe may be the solvent weld type provided an expansion joint is provided if the length of run exceeds 100 lineal feet.  All pipe shall 20 feet or less in length.  Pipe shall have the following minimum dimensions: Pipe and fittings shall meet to or exceed SDR‑35.


 

Nominal Pipe Size Inches

Outside Diameter Inches

Minimum Wall Thickness, Inches

4

4.215

0.125

6

6.275

0.180

8

8.400

0.240

10

10.500

0.300

12

12.500

0.360

 

 

(5)        Spigot ends will have a 15 degree tapered end with a memory mark around the diameter of the pipe to indicate proper insertion depth.

 

(6)        Wyes shall be of the same material as the pipe, and in no case shall have thinner walls than that of the pipe furnished.  Sample wyes must be submitted for the Engineer's approval and his approval must be obtained before purchase of the wyes.

 

 1303.  A.B.S. solid wall pipe shall have a minimum wall thickness of schedule 40 pipe, and will be permitted for installation up to six inches in diameter.  A.B.S. solid wall pipe shall conform to the requirements of ASTM D‑1788, Type I and Type IV, except that the minimum heat deflection temperature (ASTM D‑648) shall be 180 degrees Fahrenheit.

 

 1304. Ductile Iron Pipe

            (1)        Ductile iron pipe shall be of thickness Class 51 (AWWA C‑150) for three or four inch pipe and thickness Class 50 (for pipe sizes four inches through 12 inches) meeting the requirements of ASA Specification A‑21.51 and shall have joints conforming to ASA A‑21.11 of the push on rubber gasket type or the mechanical joint type with plain rubber gaskets.

 

            Fittings shall be of the short body design and shall meet ASA Specifications A‑21.10 and shall have mechanical or push on rubber gasket type joints.

 

(a)        All exterior surfaces of pipe and fittings shall be coated with hot coal tar as specified in the Proposed American Standard Specifications for Coal Tar Dip Coatings for Cast Iron Pipe and Fittings.  

(b)        All interior surfaces of pipe and fittings shall be coated with the standard thickness of cement mortar lining in conformity with the requirements of ASA Standard A‑21.4.  

(c)        Pipe and fittings shall be handled in such a manner as to insure installation in sound, undamaged condition.  Particular care shall be taken not to injure the pipe coating and lining.  Cement lining in pipe or fittings which is broken or loosened shall be cause for rejection of the pipe or fittings.

(d)        All damaged pipe coating shall be repaired, prior to laying the pipe or placing the backfill.  Repair shall be accomplished by removing all damaged coating, wire‑brushing to exposed metal, and applying two coats of coal tar coating or a type and quality equal to that used originally in coating the pipe.  

(e)        Cutting of pipe for closure pieces or for other reasons shall be done in a neat and workmanlike manner by a method which will not damage the pipe.  Before installation, each pipe shall be inspected for defects and rung with a light hammer to detect cracks.  All defective, damaged or unsound pipe shall be rejected.

 

 1305.  Polyvinyl Chloride Water Pipe. 

            (1)        General.  This specification covers rigid polyvinyl chloride pipe and fittings, hereinafter called PVC pipe and PVC fittings, the type of materials to be used and the method of application to this system.  All PVC pressure pipe shall conform to AWWA Standard C‑900.

 

            The use of PVC C‑900 water pipe shall first be approved for use by the City Engineer and Public Works Director.

 

 1306.  Polyvinyl Chloride Plastic Pressure Pipe.

 

(a)        Basic Materials. The rigid PVC pipe used in the municipal water main distribution system shall have a cell classification of 12454 A or B as identified by ASTM C‑1784 "Rigid Poly (Vinyl Chloride) compounds and Chlorinated Poly (Vinyl Chloride) Compounds".

 

(b)        Qualifications for Potable Water Service. The rigid PVC pipe shall bear the seal of approval (or "NSF" mark) of the National Sanitation Foundation Testing Laboratory, Inc. or other similar accredited testing agency which has qualified the pipe for potable water service.

 

(c)        Pressure Design.

            (1)        The pressure design of each length of pipe shall have the quick burst strength as listed in Table 4 paragraph 2.2.3.2 AWWA Standard C‑900.

            (2)        The internal pressure class (working pressure) rating shall be determined in accordance with paragraph A3 AWWA Standard C‑900.

            (3)        All pipe shall meet pressure Class 150 as listed in Table 1 at the end of this chapter.  Class 100 is not permitted.

 

(d)        Pipe Lengths. Pipe shall be produced in standard and random lengths.  At least eighty‑five percent (85%) of the total footage of pipe of any class and size, shall be furnished in standard lengths.  The remaining fifteen (15%) percent may be in random lengths.

            (1)        Standard laying lengths shall be 20 feet plus or minus one inch for all sizes.

            (2)        Random lengths shall not be less than ten feet long.

 

(e)        Sockets and Couplings. The integral socket bell of the PVC pipe or the separate coupling shall meet the same strength requirements as that of the pipe.

            (1)        An integral socket PVC bell or a separate coupling for use with the same size and class as that of the pipe, shall be furnished with each length of pipe.

            (2)        Rubber rings shall conform to requirements of the latest edition of ASTM D‑1869.

 

(f)         Surfaces. The inside and the outside surface of each length of pipe shall be free from nicks, scratches, and other surface defects and blemishes.  The pipe shall be homogeneous throughout, free of any bubbles, voids, or inclusions.

 

 

TABLE    1    13‑1

 

Dimensions and Pressure Classes for Dimensions Ratio (DR) for PVC 1120 Pipe With Cast Iron Pipe Equivalent ODs

 

AWWA C‑900

 

 

 

 

 

 

 

 

 

 

 

 

OD - in.

 

Wall Thickness - in.

Nominal Size. In.

Pressure Class * at 73.4F (23C) psi

DR

Average

Tolerance

Min.

Tolerance

 

 

 

 

 

 

 

4

100

25

4.800

+/‑0.009

0.192

+0.023

 4

 150

18

4.800

+/‑0.009

0.267

+0.032

 4

200

14

4.800

+/‑0.009

0.343

+0.041

 6

100

25

6.900

+/‑0.011

0.276

+0.033

 6

150

18

6.900

+/‑0.011

0.383

+0.046

 6

200

14

6.900

+/‑0.011

0.493

+0.059

 8

100

25

9.059

+/‑0.015

0.362

+0.043

 8

150

18

9.059

+/‑0.015

0.503

+0.060

 8

200

14

9.059

+/‑0.015

0.646

+0.078

10

100

25

11.100

+/‑0.015

0.444

+0.053

10

150

18

11.100

+/‑0.015

0.617

+0.074

10

200

14

11.100

+/‑0.015

0.793

+0.095

12

100

25

13.200

+/‑0.015

0.528

+0.063

12

150

18

13.200

+/‑0.015

0.733

+0.063

12

200

14

13.200

+/‑0.015

0.943

+0.113

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Pressure classes are working‑pressure ratings.