SECTION 15020 DETAIL PIPING SPECIFICATION – POLYVINYL CHLORIDE (PVC) PIPE AND FITTINGS

This spec was part of the Des Plaines, IL River WRF project that bid Feb 26, 2015.


SECTION 15020

DETAIL PIPING SPECIFICATION – POLYVINYL CHLORIDE (PVC) PIPE AND FITTINGS


PART 1 GENERAL

1.1 SECTION INCLUDES

A. Polyvinyl chloride (PVC) pipe and fittings.

1.2 RELATED SECTION

A. Section 15000 - Plant Piping - General: See referenced Section for additional requirements.

1.3 SUBMITTALS

A. As specified in Section 15000.


PART 2 PRODUCTS

2.1 PIPE

A. Less than 4-inches:
1. PVC, Schedule 80, Class 12454-B, (Type I, Grade 1), conforming to ASTM D 1784 and ASTM D 1785.

B. 4-inch and larger:
1. PVC, Schedule 80, Class 12454-B, (Type I, Grade 1), conforming to ASTM D 1785 and ASTM D 2466.

2.2 NIPPLES

A. Same as pipe, except threaded nipples shall be Schedule 80.

2.3 JOINTS

A. Socket-weld, except where connecting to unions, valves, and equipment with threaded connections that may require future disassembly.

2.4 FITTINGS

A. Schedule 80, as specified under PIPE.  Fittings shall conform to the requirements of ASTM D 2467 for socket type and ASTM D 2464 for threaded type.

2.5 FLANGES

A. One-piece, molded hub type flat-faced flanges, 125-pound standard.

2.6 GASKETS

A. Full-faced, 1/8-inch thick, fabricated from ethylene propylene rubber (EPR).

B. When mating flange has raised face, use flat ring gasket and provide filler gasket between OD of raised face and flange OD to protect PVC flange from bolting moment.

2.7 BOLTING

A. Bolts shall be fabricated in accordance with ANSI B18.2 and provided with washers of the same material as the bolts.

B. With Flat Ring Gaskets:  Carbon steel, ASTM A 307, Grade B square head bolts & ASTM A 563, Grade A heavy hex head nuts

C. With Full Face Gaskets or in Corrosive Areas or Outside Locations: Type 316 stainless steel, ASTM A 193, Grade B8M hex head bolts and ASTM A 194, Grade 8M hex head nuts.

2.8 SOLVENT CEMENT

A. All socket connections shall be joined with primer and PVC solvent cement conforming to ASTM D 2564. Manufacture and viscosity shall be as recommended by the pipe and fitting manufacturer to assure compatibility.

2.9 THREAD LUBRICANT

A. Teflon tape.


PART 3 EXECUTION

3.1 GENERAL

A. All rigid PVC pipe shall be cut, made up, and installed in accordance with the pipe manufacturer's recommendations.  Buried plastic pipe shall be laid by snaking the pipe from one side of the trench to the other. Offset shall be as recommended by the manufacturer for the maximum temperature variation between time of solvent welding and during operation.

B. Only strap wrenches shall be used for tightening threaded plastic joints, and care shall be taken not to over-tighten these fittings. Pipe shall not be laid when the temperature is below 40º F, nor above 90º F when exposed to direct sunlight. Ends to be joined shall be shielded from direct sunlight before and during the laying operation.

C. Provide adequate ventilation when working with pipe joint solvent cement.

3.2 TESTING

A. All lines shall be hydrostatically tested at the pressures listed in the Piping Schedule. Test procedures shall be as specified in Section 15000.

3.3 SUPPORTS AND HANGERS

A. Supports and hangers shall be as specified in Section 15000, except spacing shall be in accordance with the pipe manufacturer's recommendations.


END OF SECTION