Appendix A. Appendix.
SPECIFICATIONS FOR CULINARY WATER LINES
City of Moab, Utah
April 19, 1977
A. PIPE MATERIALS:
1.1. GENERAL: Pipe used in culinary water line construction in the City of Moab shall be ductile iron or PVC plastic.
1.2. DUCTILE IRON: Ductile iron pipe shall conform to all requirements of ANSI A 21.51 “Ductile Iron Pipe, Centrifugally Cast in Metal Molds or Sand Lined Molds, for Water or Other Liquids.” Minimum thickness shall be Class 51 with a 350 psi pressure rating.
1. JOINTS:
a. Mechanical Joints. All mechanical joints shall meet requirements of Specifications ANSI 21.6 and ANSI 21.11. All gasket surfaces shall be smooth and free from imperfections. Gaskets shall conform to tests in accordance with specifications and shall be less than one year old.
Bolts shall meet all requirements of the above specification, honoring all characteristics, tolerances and tests.
b. Push-On-Joints. All push-on joints shall meet the requirements of ANSI 21.11. Gaskets shall be free from defects and not over one year old.
c. Flanged Joints. Flanged joints shall be bolted firmly with machine, stud or cap bolts of proper size. Flanges may be cast integrally with the pipe or may be screwed on threaded pipe. Flanges shall be faced and drilled and of proper dimensions for size and pressure required. All flanges shall meet requirements of ANSI A 21.10 “American Standard for Cast Iron Fittings.”
Bolts and nuts, unless otherwise specified, shall be made of the best quality refined iron or metal steel and have clean well fitting threads. Bolts will be provided with standard hexagonal nuts and standard hexagonal heads. Bolts shall be of the diameter required for each flange and when installed shall be of length so that no more than 3/8 inch or less than 1/8 inch extends past face of nut.
Gaskets shall be 1/16 inch thick made of best quality asbestos sheet gasket material or equal. A gasket for each flanged joint of proper size, ring type or full face.
d. Compression Joints. Compression joints shall be mechanical joint sleeve, Smith Blair 441 or Flanged adapter Smith Blair Type 900 or equal.
2. FITTINGS:
a. Mechanical Joint Fittings. Mechanical joint fittings shall conform to ANSI A 21.10 “American Standard for Cast Iron Fittings.”
b. Push On Fittings. Push on fittings shall conform to ANSI A 21.10 with bells, sockets and plain ends per ANSI A 21.11.
c. Flanged Fittings. Flanged fittings shall conform to ANSI A 21.1, “American Standard for Cast Iron Fittings.”
All flanges shall be faced and drilled. Where cap screws or stud bolts are needed, flanges shall be tapped to support cap screws or stud bolts.
3.
LAYING PIPE: Ductile iron pipe shall be laid as specified in AWWA Standard for “Installation of Cast Iron Water Mains” C-600.
Tees, elbows, crosses, and reducers shall be used for changes in direction and outlet.
Anchor and thrust blocks shall be placed at valves, elbows, tees, etc.
All compression couplings, mechanical joints, flanged joints, and valves exposed to soil shall be wrapped with 8 mil thick polyethylene film adhesive tape equal to Polyken No. 900 or Scotchrap No. 50. The tape shall be installed to adhere securely to both the pipe and polyethylene. Enough film shall be used to overlap the adjoining pipe a minimum of one foot.
Valves shall be wrapped by bringing the wrap on the adjacent pipe over the bells or flanges of the valve and sealing with the adhesive tape. The valve bodies are then wrapped with a flat sheet of the film passed under the valve bottom and brought up around the body to the stem and fastened in place with the adhesive tape.
All fittings that require concrete blocking should be completely wrapped prior to pouring the concrete backing block.
Polyethylene wrap shall be protected from the sun and weathering prior to use. Care shall be exercised during back-filling of the protected areas to prevent puncturing the film. Bottom of trench shall be shaped to give substantial uniform circumferential support of lower third of each pipe.
1.3. PVC PLASTIC PIPE: PVC Plastic Pipe shall be made from clean virgin, Type I, Grade 1, unplasticized polyvinyl chloride (PVC) and shall meet the requirements of the latest revision of ASTM D-1784, ASTM D-2241, with standard dimension ratio of 18 (Class 150 psi) for all pipe. All pipe and fittings shall be NSF approved. Pipe shall also meet the requirements of AWWA C-900.
Pipe and fitting joints shall be socket weld type or rubber gasket bell and spigot type.
Fittings shall be of the same PVC material as the pipe where possible and shall in no case have walls thinner than the pipe used. Fittings shall be capable of sustaining pressures equal to those defined by ASTM 1599 and ASTM 1598 for quick-burst and sustained pressure tests. Fittings shall be specifically designed to be compatible with the pipe joint.
Service connections to PVC plastic lines shall be through either tapped couplings (AWWA thread) or bronzed service saddles specifically designed for plastic pipe (equal to Christy) or polypropylene saddles with stainless steel reinforcing caps (equal to Smith-Blair). Reducing bushings shall be of nylon.
1.4. When PVC plastic pipe or other nonmetallic materials are used in the installation of pipe for culinary water lines in the City, said materials will require an electrically conductive wire be installed with the piping to facilitate locating it with an electronic pipe locator. Other suitable material or means for accomplishing this purpose may be employed. Said wire or material must be installed at the expense of the contractor installing the line, and installation shall be supervised and inspected by the City Utilities Superintendent, or his authorized inspector.