853.01 Ductile Iron Sewer Pipe.
SANITARY SEWER PIPE, MANHOLES, AND APPURTENANCES
853.01 Ductile Iron Sewer Pipe.
Ductile Iron pipe shall meet the requirements of ANSI/AWWA C 151/A21.51 unless otherwise stated in the project specifications and plans. The pipe shall have an inner cement mortar lining meeting AWWA C 104 and an outer bituminous coating. The push -on joints shall meet the requirements of AWWA C 111. The flanged pipe joints shall meet the requirements of AWWA C 115. Restrained joints shall meet the requirements of AWWA C 110. Lock joint pipe shall meet the requirements of AWWA C 151. The pipe length shall be 18 – 20 feet {5.5 – 6.1 meters}.
853.02 Ductile Iron Fittings.
Ductile Iron fittings shall meet the requirements of AWWA C 110 or AWWA C 151 when approved by the Engineer. Fittings shall have an inner cement mortar lining meeting AWWA C 104 and an outer bitum inous coating. The fitting shall have a minimum pressure rating equal to the pipe being installed.
853.03 Polyvinyl Chloride Sewer Pipe (PVC) and Fittings.
Pipe for pressure flow applications shall meet the requirements of ASTM D 2241 for SDR 17 or AWWA C 900 for DR 18 with a minimum cell classification 12454- B as defined in ASTM D 1784. Fittings for pressure flow applications shall be ductile iron meeting the requirements of AWWA C 110. Pipe and fittings for gravity flow applications shall meet the require ments of ASTM D 2665, ASTM D 3034 for SDR 35, or ASTM F949 with a minimum cell classification 12454- B as defined in ASTM D 1784. Marking tape shall be provided for all PVC force mains to allow for locating by location equipment.
853.04 High Density Polyeth ylene Pipe (HDPE) and Fittings.
HDPE pipe and bends shall meet the requirements of ASTM D 1248, ASTM D 3350 (Grade PE 3408), and ASTM F 714. The HDPE pipe shall have a minimum wall thickness determined by the depth of bury and loading on the pipe.
853.05 High Performance Polypropylene Pipe (PP) and Fittings .
PP pipe and bends shall meet the requirements of AASHTO M330. The PP pipe shall have a minimum wall thickness determined by the depth of bury and loading on the pipe. PP pipe shall be furnished from an approved producer. Approved producers are shown on List I -14, "Producers of High Performance Polypropylene Pipe" in the Department’s "Materials, Sources and Devices with Special Acceptance Requirements" manual. Information concerning this list is given in Subarticle 106.01(f).
853.06 Handling and Storage of Pipe.
Pipe shall be handled, transported, delivered, and stored by methods that will not damage the pipe, coatings, or linings. Any pipe damaged or bent will be rejected even though previously inspected and found satisfactory, and shall be replaced or repaired at the Engineer's option, without additional compensation. Coating or linings scratched shall be repaired in a satisfactory manner with appropriate material.
853.07 Joint Materials for Pip e.
Joint material shall provide a suitable waterproof joint capable of withstanding internal pressure of the system involved and be of an approved type. Thermally fused joints will be allowed if installed according to the pipe manufacturer’s recommendatio ns.
853.08 Manholes.
Precast reinforced concrete manholes shall meet the requirements of ASTM C 478. The manhole shall consist of the base, riser, transition, and conical sections and shall have a minimal number of joints. The minimum nominal diameter of m anholes shall be 48 inches {1220 mm} for pipe sizes less than 24 inches {600 mm}. The aggregate shall be calcareous rock. Concrete used to cast manholes shall comprised with Type I/II or Type II cement only. The cone shaped top section shall be either co nical or eccentric as required by the project plans and specifications. The top section of manholes less than 6 feet {1.82 m} in depth shall be flat concrete slabs and shall conform to the requirements of ASTM C 478. Basis of acceptance
854.01 Concrete (Storm) Sewer Pipe.
for flat slab tops shall be either proof of design testing or rational design calculations as described in ASTM C 478 and shall be submitted to the Engineer for review. Both cone shaped top sections and flat slab tops shall be designed to withstand a minimum H -20 wheel loadi ng in accordance with AASHTO requirements. A black mastic joint sealer as approved by the Engineer shall be placed on top of the cone section of the manhole before setting the castings to prevent infiltration. Manholes shall be supplied with pipe cutouts for all incoming and outgoing pipe. The pipe cutouts shall be fitted with flexible manhole pipe connectors (boots) that meet ASTM C 923 and as required by the Engineer. Cast iron frames and covers shall conform to the Plans in all essentials of design. Al l castings shall fit the manholes properly. All castings shall be made of clean, even grain, tough gray cast iron. The quality of iron in the castings shall conform to the current ASTM A 48 for Class 30 gray iron castings. Frames and covers shall weigh not less than that shown on the Plans. The castings shall be smooth, true to pattern and free from projections, sand holes or defects and shall properly fit the manhole opening. The portion of the frame and cover which forms the cover seal shall be machined s o that no rocking of the cover is possible. The castings shall be coated with coal tar pitch varnish. The cover shall have non - penetrating pick holes. On paved streets, the frame and cover shall be set flush with and in the plane of the paved surface. Wher e shown on the plans or directed by the Engineer, sealed castings shall be of the bolted watertight manhole rings and covers and meet the above requirements. Manhole steps shall be steel rods encased in polypropylene plastic and shall be as approved by the Engineer. Steps may be Type PS -1 or PS -2. Steps shall conform to the requirements of ASTM C 478. Manhole steps shall be driven into the wet wall during manufacture to prevent each from working loose or pulling out. Manholes shall be constructed in the siz e, shape, and dimension as detailed in the Utilities Standard Drawings or on the plans.
853.09 Crushed Stone Foundation for Pipe and Manholes.
Crushed Stone shall be screened, washed and 100 percent shall be retained by a 1/4 inch {6 mm} sieve. Crushed sto ne shall have 100 percent passing a 1 inch {25 mm} sieve and shall be uniformly graded from maximum to minimum size. Foreign matter shall not exceed 3 percent by weight when dry.
853.10 Air and Vacuum Valve.
The air and vacuum valve for sanitary sewer shal l permit unrestricted passage of air during filling of the force main and unrestricted entry of air during vacuum of the force main and rated for a minimum of 150 psi {1030 kPa}. The float shall be stainless steel. The valve shall not come into contact wit h the sewer. The valve shall have a National Pipe Thread (NTP) inlet and shall be fitted with back flushing device. The air and vacuum valve assembly shall be as detailed in the project plans and specifications. SECTION 854 STORM SEWER PIPE
854.01 Conc rete (Storm) Sewer Pipe.
a.Plain Concrete Pipe (PC). Only plain concrete pipe 24 inches {610 mm} or less in diameter (or equivalent area in arch pipe) will be permitted. Circular pipe shall meet the requirements for Class 2 pipe of AASHTO M 86 or for Class II of AASHTO M 170 without steel reinforcement, provided the same strength requirements for the same size pipe provided in AASHTO M 86 for Class II pipe are met.
b.Reinforced Concrete Pipe (RC). Circular pipe over 24 inches {610 mm} in diameter shall meet the requirements of AASHTO M 170 for Class II unless another class is designated by the plans or proposal. Arch pipe larger than 18 inch {455 mm} rise by 28.5 inch {725 mm} span shall meet the requirements of AASHTO M 206 for Class A -II unless another class is designated by the plans or proposal.
c.Acceptance. In addition to the above requirements, all precast products furnished must meet the requirements of Section 831, Precast Concrete Products.
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 775–775 of 934.