15400_en.doc

SECTION 15400

PLUMBING

PART 1 - GENERAL

1.1

APPLICABLE PUBLICATIONS

The following publications of the issues listed below, but referred to thereafter by basic designation only, form a part of this specification to the extent indicated by the references thereto:

Italian Superior Institute for Accident Prevention and Safety at Work (ISPESL) Publications:

D.P.R. 27 April 1955 No. 547.

Italian Laws and Decrees Relating to Heating Plants, in particular:

Law No. 615, 13 July 1966:

Provisions Against Atmospheric Pollution.

Decree No. 1391, 22 December 1970 Regulations for the Execution of Law No. 615.

Italian National Association for Combustion Control (ANCC) (now ISPESL) Publications:

Technical Circular No. 14/77, 10 June 1977 "R Collection"

Italian National Institute for the Unification of Standards (UNI) Publications:

UNI EN 1562

(1999) Founding - Malleable Cast Iron

UNI EN 10255

(2005) Non-Alloy steel tubes suitable for welding and threading - Technical delivery conditions

UNI 10368

(1994) Tin-Lead Alloys for Soft Soldering and Coatings. Types and Requirements.

UNI EN 10242

(2001) Threaded Pipe Fitting in Malleable Cast Iron.

UNI 9182

(1987 + A1-1993) Water Supply and Distribution. Drainage System and Storm Water System.

UNI EN 12056-1

(2001) Gravity Drainage Systems Inside Buildings - General and Performance Requirements.

UNI-ISO 228/1

(2003) Pipe Threads Where Pressure-Tight Joints are not Made on the Threads. Designation, Dimensions and Tolerances

UNI-ISO 7/1

(2003) Pipe Threading for Non-Watertight Coupling on Thread. Designation, Dimensions, and Tolerances.

UNI 5634

(1997) Identification Systems for Pipelines and Canalizations Conveying Fluids.

German Standards (DIN)

DIN 19502

Cast-iron waste and soil pipes with socket.

DIN 19507

DIN 19522

Cast-iron waste and soil pipes without socket.

1.2

GENERAL REQUIREMENTS

Section 15050, "Basic Mechanical Materials and Methods" applies to this Section, with the additions and modifications specified herein.

1.3

DESCRIPTION OF WORK

The work includes providing new plumbing systems and related work. Provide each system complete and ready for operation. Capacity of equipment shall be not less than that indicated. Plumbing system shall include all water, and sanitary piping buried and above ground, except water, and sanitary piping more than 1.5 meters outside of the building walls which is specified under another Section.

1.4

SUBMITTALS

1.4.1 Manufacturer's Data

(Submit detail of trap with fixtures which require traps. Submit detail of trap for all floor drains.)

a.

Sanitary, waste, drain and vent piping b.

Sanitary, waste, drain and vent pipe fittings c.

Cleanouts d.

Floor drain (mechanical, general, funnel top) e.

Floor sink (general) f.

Domestic hot water system (heater, pump, and appurtenances) g.

Water pipe h.

Water pipe fittings i.

Gate valves j.

Check valves k.

Pressure relief valve l.

Wall hydrants m.

Water hammer arrestor n.

Backflow preventer o.

Pipe hangers (hanger and rod) p.

Water closets and flush valves q.

Lavatory, countertop and faucet set r.

Lavatory, handicapped and faucet set s.

Mop basin and faucet set t.

Electric water coolers u.

Urinal and flush valve v.

Kitchen sink faucets, shower pan and faucet w.

Water heater x.

Pump

1.4.2 Operation and Maintenance Manuals:

a.

Domestic hot water system b.

Electric water coolers

1.5

EXCAVATION, TRENCHING AND BACKFILLING

Provide under this section as specified in Section 02315, "Excavation and Fill."

1.6

INSULATION

Insulate equipment and piping under this section as specified in Section 15080, "Mechanical Insulation."

1.7

FIELD PAINTING

Provide under Section 09900, "Paints and Coatings."

1.7.1 Italian Legislation regarding Accident Prevention D.P.R. 27 April1955 No. 547.

1.8

FLASHING

Provide under Section 07600, "Flashing and Sheet Metal."

1.9 ELECTRICAL MOTORS, CONTROLLERS, CONTACTORS AND DISCONNECTORS

Furnish motor, controllers, contactors, and disconnects with their respective pieces of equipment. Motors, controllers, contactors, and disconnects shall conform to and shall have electrical connections provided under Section 16402, "Interior Distribution Systems". Controllers and contactors shall have a maximum of 220 V control circuits, and auxiliary contacts for use with the controls furnished. When motors and equipment furnished are larger than sizes indicated, the cost of providing additional electrical service and related work shall at Contractor’s expenses.

1.10

CLASSES AND MAXIMUM WORKING PRESSURE

Except as specified otherwise, equipment and piping components shall be suitable for use under the maximum working pressures indicated. Except as modified herein, the pressure and temperature limitations shall be as specified in the referenced standards and specifications. All pressures in this specification are in units above atmospheric pressure.

1.11

STANDARD COMMERCIAL PRODUCT FOR HOT WATER SYSTEM

Hot water storage heater shall be the manufacturer's standard commercial product. Prior to commencement of construction, the Contractor shall submit a certified written report from the water heater manufacturer to show that substantially identical equipment of comparable capacity (within 20 percent) has been successfully installed and operated in at least three installations under similar operating conditions. The report shall include the date of installation, type, model, capacity, and address location of installed water heater. A standard commercial product is a product which has been sold or is currently being offered for sale on the commercial market through advertisements or manufacturer's catalogs or brochures.

1.12

SERVICE AVAILABILITY

The contractor shall submit a certified list of qualified permanent service organizations for hot water system controls, and instrumentation which includes their addresses and qualifications. These service organizations shall be reasonably convenient to the equipment installation and able to render satisfactory service to the equipment on a regular and emergency basis during the warranty period of the contract.

1.13

SAFETY STANDARDS

1.13.1 Welding

Safety in welding and cutting of pipe shall conform to National Institute of Welding.

1.13.2 Guards

Couplings, motor shafts, gears and other moving parts shall be fully guarded. Guards shall be cast iron or expanded metal. Guard parts shall be rigid and suitably secured and be readily removable without disassembling the guarded unit.

PART 2 - PRODUCTS

2.1

SANITARY, DRAIN, WASTE AND VENT PIPING

Underground and above ground soil, waste and vent piping shall be of the following types:

2.1.1 Aboveground Soil, Drain, Vent Pipe and Fittings

Pipes and fittings shall be cast iron without socket (hubless pipes) conform to DIN 19522.

2.1.2 Underground Soil, Drain, Vent Pipe and Fittings

Pipes and fittings shall be cast iron with socket, hub and spigot pipes with caulked and leaded joints, conform to DIN 19502-19507.

2.1.3 Cleanouts

Provide cleanouts where required. Cleanouts shall be chromium plated die-cast brass plate, flush with floor or wall.

2.1.4 Shower Floor Drain

Cast iron body with square frame, polished bronze or chromium/nickel plated bronze round grate with underneath dome type trap, with enamel finish.

2.1.5 Mechanical Room Floor Drains (General)

Provide 200 x 200 x 150 deep sump, cast-iron body with white acid-resisting porcelain enameled or epoxy interior, double drainage flange, nickel bronze rim and slotted sediment grate, removable stainless steel or aluminum slotted buckets. Top shall have extended funnel.

2.1.6 All floor drains shall be provided with cast iron P-trap.

2.2

DOMESTIC WATER PIPING

2.2.1 Water Pipe

All cold and hot water pipes 50 mm and smaller shall be type K copper pipe of quality CU-DHP, conforming to UNI EN 1057 e UNI 9182 unless otherwise indicated on drawings. Piping 65 mm to 100 mm shall be seamless galvanized steel pipe, UNI EN 10255. Exposed cold and hot water supply piping to the plumbing fixtures shall be chrome-plated brass pipe.

2.2.2 Water Valves

Provide valves suitable for not less than 1000 kPa. Valves shall have rising stems and shall open when turned counterclockwise.

a.

Gate Valves: Valves shall be of the wedge disc type, permit straight line flow, complete shut-off and be so designed that when the valve is wide open, it can be packed under pressure. Valves 50 mm and smaller shall be bronze with female screwed ends. Valves 65 mm and larger shall be cast-iron body, bronze trim and flanged ends.

b.

Check Valves: Valves 50 mm and smaller shall be bronze body, swing check with female screwed ends.

c.

Ball Valves: Valves shall be bronze body with chromium plated ball and lever handle.

d.

Pressure Relief Valves: Bronze body with test lever and suitable for intended service.

e.

Wall Hydrant: Provide encased, antisiphon, auto-draining flush mounted, key operated wall hydrants having 20 mm hose connections. Provide polished nickel bronze face, with "WATER" cast in cover.

f.

Water Hammer Arrestor: Shall be copper with bronze screwed inlet for pipe connection and complete with bronze piston and air valve for filling and air discharge. Inlet size as indicated on drawing. Working pressure: 1,000 kPa.

g.

Backflow Preventer: Shall be of the reduced pressure type with two independently operating check valves and shall be designed for installation in a normal horizontal flow attitude. Backflow preventer shall be similar to Watts 909 (Cazzaniga) and shall be installed where indicated on drawings.

2.2.3 Dielectric Connections

Provide at connections between ferrous and non-ferrous metal piping materials.

2.2.4 Strainers

Y-type strainers shall be the same size as the pipelines in which they are installed. The strainer bodies shall be brass, with bottoms drilled and plugged. The bodies shall have arrows clearly cast on the sides to indicate the direction of flow. Each strainer shall be equipped with an easily removable cover and sediment basket. The basket shall be of stainless steel sheet with small perforations of sufficient number but not less than 50 per square centimeter for sediment baskets up to 50 mm in size.

2.3

MISCELLANEOUS PIPING MATERIALS

2.3.1 Pipe Nipples

Copper alloy for use in copper tubing and zinc-coated UNI EN 10255 steel pipe for use in steel piping.

2.3.2 Unions

Bronze for use in copper tubing; zinc-coated steel for use in steel piping.

2.3.3 Escutcheon Plates

Provide approved one piece or split hinge type plates for piping passing through floors, walls, and ceilings in both exposed and concealed areas. Provide chromium plated plates where pipe passes through finished ceilings. Provide other plates of steel or cast iron with aluminum paint finish. Securely anchor plates in place with set screws or other approved positive means.

2.3.4 Pipe Sleeves

Provide where piping passes entirely through walls, ceilings, roofs, and floors. Grout sleeves in position and location during construction. Provide sleeves of sufficient length to pass through entire thickness of walls, ceilings, roofs, and floors. Provide not less than 6 mm clearance between exterior of piping or pipe insulation, and interior of sleeve or core-drilled hole. Firmly pack space with mineral wool insulation and calk at both ends of the sleeve or core-drilled hole with plastic waterproof cement which will dry to a firm but pliable mass, or use a segmented elastomeric seal. In fire walls and fire floors, calk both ends of pipe sleeves with fireproof fill, void, or cavity material.

2.3.4.1 Sleeves in Masonry and Concrete Walls, Ceiling, Roofs, and Floors

Provide UNI EN 10255 hot-dipped galvanized steel, ductile-iron, or cast iron pipe sleeves. Core-drilling of masonry and concrete may be provided in lieu of pipe sleeves provided that cavities in the core-drilled holes are completely grouted smooth. Sleeves are not required where piping passes through concrete floor on grade. Sleeves in floor slabs shall extend 75 millimeters above the finished floor.

2.3.4.2 Sleeves in Other than Masonry and Concrete Walls, Ceilings, Roofs, and Floors

Provide galvanized, steel sheet, pipe sleeves having a nominal weight of not less than 4.9 kg/m2.

2.3.5 Pipe Hangers (Supports)

Provide swivel ring or wrought clevis of the adjustable type, except as indicated or specified herein. Provide galvanized steel insulation protection shields for insulated piping. Provide steel support rods. Provide non-metallic, plastic piping isolators between copper tubing and the hangers.

2.3.6 Pipe and Valve Identification

See Section 15050, "Basic Mechanical Material and Methods."

2.4 WATER HEATER (ELECTRIC)

Electric water heaters with double heating element, glass-lined steel tanks, high efficiency type insulated with polyurethane foam insulation, replaceable anodes, with adjustable range thermostat to allow hot water settings between 40 and 70 degrees C. Provide combination pressure and temperature relief valve, copper alloy body, automatic reseating, test lever, and discharge capacity based on ISPESL Regulations. Provide plastic lined threaded steel dielectric pipe nipple at the water inlet connection and at the water outlet connection.

2.4.1 Pump

Submit manufacturer's certified pump test curves showing the characteristics of each hot water recirculating pump over the entire operating range for approval together with complete catalog data necessary to determine compliance with the specifications. Submittals shall indicate actual diameter of impeller being furnished. Pumps shall be selected so that the operating point on the selected impeller curve will lie at or on the left (shut-off side) of the point of maximum efficiency for the impeller. Curves shall indicate capacity vs. head, efficiency, and brake horsepower for full range, from shut-off to free delivery. Pumps shall be centrifugal all bronze constructed in-line type. Pumps shall be provided with mechanical seals and drip-proof electric motors.

2.5

FIXTURES, FITTINGS, ACCESSORIES, AND SUPPLIES

Provide control-stop valves in each supply to each fixture. The finish of fittings, accessories and supplies exposed to view shall be chromium-plated. Plastic or zinc alloy handles will not be permitted for faucets and valves. Where model names or manufacturers names are indicated, "or approved equal is implied" names indicated are for general quality and type standards only. To the maximum extent possible fixtures and appurtenances shall be from a single manufacturer or supplier.

2.5.2 Thermometers

Minimum 200 mm scale fixed or adjustable angle. Scale and temperature ranges shall be suitable for the intended service. Thermometers installed in close proximity to system thermostats shall be of the mercury type. Thermometers that are located elsewhere in the system can be of the organic liquid type as approved. The style and form of the thermometers shall be selected so that after installation as indicated they shall be conveniently read from the floor. Dial type thermometers selected shall be suitable for the intended service.

PART 3 - EXECUTION

3.1

WATER SYSTEM INSTALLATION

All pipes shall be installed complete with special parts of all kinds (elbows, runouts, sleeves, brass fittings, "Y" connections, traps, etc) and with the necessary threading, mastic, hangers, ties, anchors and supports. When making holes, chases, grooves, etc., in the masonry surface for pipe crossing, the utmost care shall be exercised to avoid damages and to keep the dimensions of the cuts to the minimum necessary. Pipelines shall be connected with the fittings by threading, full tightening and application of white lead and boiled linseed oil on the threads. Piping layout shall be such as to avoid sharp curves or chokes. Changes in pipe size shall be made with reducing fittings. Hot or cold pipe bending for the purpose of avoiding the use of fittings is not allowed. The pipes shall be installed either exposed, above suspended ceiling, in shafts or recessed as indicated on drawings. Thermal insulation for domestic water piping shall be as described in Section 15080, "Insulation of Mechanical Systems."

3.1.1 Noise and Vibration Control

Provide vibration isolation, noise isolation and seismic restraint for pipe and equipment as per Section 15070, "Mechanical Sound, Vibration, and Seismic Control."

3.1.2 Final Test of Water Systems

In accordance with UNI 9182, chases and grooves shall not be backfilled, and walls plastered until all piping has been cleaned and inspected for seal. Therefore, the water system shall be hydrostatically tested as pressure of 1-1/2 times the working pressure or 7 bars, whichever is greater for not less than 4 hours. Leaks noted during final test shall be eliminated by replacing the pipe or fitting. Caulking of joints will not be permitted. All tests will be conducted in the presence of the Contracting Officer’s Technical Representative, by Contractor's furnished equipment.

3.1.3 Disinfection

After pressure tests have been made, the entire domestic water distribution system shall be thoroughly flushed with water and disinfected by chlorination until all entrained dirt and mud have been removed. Fill the system with a solution containing a minimum of 50 parts per million of available chlorine and allow solution to stand for a minimum of 24 hours. Flush the solution from the systems with clean water until the residual chlorine content is not greater than 0.2 parts per million.

3.2

DRAIN SYSTEM INSTALLATION

Whatever their material may be, drain lines shall follow the shortest layout possible, compatible with the good operation of the system. Drains shall be as much as possible free of sharp changes in direction, size and reverse gradient, and shall be easy to inspect, particularly at joints, traps, etc. On the whole, the system shall be such that waste liquid material is drained away rapidly and completely without causing clogging or stagnation. All offsets shall be made of special parts. Provide seismic joint where pipe penetrations pass through exterior foundation walls.

3.2.1 Final Test of Drain Systems

In accordance with UNI 12056-1. Prior to filling chases and channels, plastering walls, constructing floor slabs, and other similar work, offsets and water drain lines shall be subjected to final test. The system shall have all openings perfectly plugged so that it may be filled with water for a 24 hour period. If no leaks, dripping, deformations, or other failures occur, especially at joints, the test results will be considered satisfactory. Subsequently, when the openings are unplugged, the water contained in the system shall run freely. In case of unsatisfactory test results, the necessary repair and restoration work shall be performed, and the test repeated until satisfactory results are obtained. All tests shall be conducted at the presence of the Contracting Officer’s Technical Representative by Contractor's personnel at no additional cost for the US Government.

3.3

MAXIMUM SPACE BETWEEN HANGERS

a.

Vertical Piping: Support metal piping at each floor, but at not more than 3 m intervals.

b.

Horizontal Piping: Support cast iron piping at 1.5 m intervals, except for pipe exceeding 1.5 m length, provide supports at intervals equal to the pipe length but not exceeding 3 m. Support piping as follows:

MAXIMUM SPACING METERS

Nominal Pipe 25 mm 32mm 40mm 50mm 65mm 75mm

Size (mm) and under

Steel Pipe

2.1 2.4 2.7 3.1 3.4 3.7

Copper Pipe

1.8 2.1 2.4 2.4 2.7 3.1

--End of Section --

Section 15400

Section 15400