final 22 05 00 Basic Plumbing Materials and Methods.pdf

OFFUTT AIR FORCE BASE

(092036) 22 05 00-1 (Repair AHU O-Club, B462) 2010 by FEI

SECTION 22 05 00

BASIC PLUMBING MATERIALS AND METHODS

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes the following basic mechanical materials and methods.

1. Piping materials and installation instructions common to most piping systems.

a. Valves:

(1) Gate

(2) Ball

(3) Check

b. Meters and gauges:

(1) Pressure gauges

c. Supports and anchors:

(1) Horizontal-piping hangers and supports

(2) Saddles and shields

2. Mechanical identification.

3. Installation requirements common to piping and equipment specification Sections.

B. Pipe and pipe fitting materials are specified in piping system Sections.

1.2 DEFINITIONS

A. Pipe, pipe fittings, and piping include tube, tube fittings, and tubing.

B. Finished Spaces: Spaces other than mechanical and electrical equipment rooms, furred spaces, pipe and duct shafts, unheated spaces immediately below the roof, spaces above ceilings, unexcavated spaces, crawl spaces, and tunnels.

C. Exposed Exterior Installations: Exposed to view outdoors, or subject to outdoor ambient temperatures and weather conditions. Examples include rooftop locations.

D. Concealed Interior Installations: Concealed from view and protected from physical contact by building occupants. Examples include above ceilings and in duct shafts.

1.3 SUBMITTALS

A. General: Not required

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1.4 QUALITY ASSURANCE

A. MSS Compliance: Mark valves in accordance with MSS-25 "Standard Marking System for Valves, Fittings, Flanges and Unions."

B. FCI Compliance: Test and rate Y-type strainers in accordance with FCI 73-I "Pressure Rating

Standard for Y-type strainers". Test and rate other type strainers in accordance with FCI 78-1

"Pressure Rating Standard for Pipeline Strainers Other than Y-type".

C. MSS Standard Compliance: Provide pipe hangers and supports of which materials, design, and manufacture comply with MSS SP-58.

1.5 SEQUENCING AND SCHEDULING

A. Coordinate mechanical equipment installation with other building components.

B. Arrange for chases, slots, and openings in building structure during progress of construction to allow for mechanical installations.

C. Sequence, coordinate, and integrate installations of mechanical materials and equipment for efficient flow of the Work. Coordinate installation of large equipment requiring positioning prior to closing in the building.

D. Coordinate connection of mechanical systems with overhead utilities and services. Comply with requirements of governing regulations, franchised service companies, and controlling agencies.

PART 2 - PRODUCTS

2.1 PIPE AND PIPE FITTINGS

A. Refer to individual piping system specification Sections for pipe and fitting materials and joining methods.

B. Pipe Threads: ASME B1.20.1 for factory-threaded pipe and pipe fittings.

2.2 JOINING MATERIALS

A. Solder Filler Metal: ASTM B 32.

1. Alloy Sn95 or Alloy Sn94: Tin (approximately 95%) and silver (approximately 5%), having

0.10% lead content.

2.3 PIPING SPECIALTIES

A. Low Pressure Pipeline Strainers:

1. General: Provide strainers full line size of connecting piping, with ends matching piping system materials. Select strainers for 125 PSI working pressure, with Type 304 stainless steel screens, with 3/64-inch perforations at 233 per square inch.

2. Threaded Ends, 2-inches and Smaller: Cast-iron body, screwed screen retainer with centered blowdown fitted with pipe plug.

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B. Dielectric Fittings: Assembly or fitting having insulating material isolating joined dissimilar metals to prevent galvanic action and stop corrosion.

1. Description: Combination of copper alloy and ferrous; threaded, solder, plain, and weld neck end types and matching piping system materials.

2. Insulating Material: Suitable for system fluid, pressure, and temperature.

3. Dielectric Unions: Factory-fabricated, union assembly for 250 PSIG (1725 kPa) minimum working pressure at a 180F (82C) temperature.

2.4 VALVES

A. General: Provide factory-fabricated valves recommended by Manufacturer for use in service indicated.

Provide valves of types and pressure ratings indicated; provide proper selection as determined by

Installer to comply with Installation requirements. Provide end connections which properly mate with pipe, tube, and equipment connections. Where more than one type is indicated, selection is Installer's option.

B. Gate Valves: Comply with the following requirements:

1. Gate Valves - 2-Inches and Smaller: MSS SP-80; Class 125, body and bonnet of ASTM B 62 cast bronze, threaded or solder ends, solid disc, copper-silicon alloy stem, brass packing gland, "Teflon" impregnated packing, and malleable iron handwheel. Class 150 valves meeting the above shall be used where pressure requires.

C. Ball Valves: Comply with the following requirements:

1. Ball valves - 1-inch and Smaller: Rated for 150 PSI SWP pressure, 600 PSI non-shock WOG pressure; 2-piece construction, bronze body conforming to ASTM B 584 or B61, full port, 316 stainless steel ball, reinforced "Teflon" or "TFE" seats and seals, blowout proof stem, and vinyl-covered steel handle. Provide extended solder ends for condenser water, chilled water, and domestic hot and cold water service; full depth ANSI threaded ends for heating hot water and low pressure steam. Provide 2-inch extended handles of non-thermal conductive material.

Valve pressure ratings shall be cast into the body of the valve.

D. Butterfly Valves: Comply with the following requirements:

1. Butterfly Valves - 2-1/2-Inches and Larger: MSS SP-67; 200 non-shock PSI, cast iron body conforming to ASTM A 126, Class B. Valves shall have field replaceable EPDM sleeve, with aluminum bronze disc, 400 Series stainless steel stem, and EPDM O-ring stem seals. Sizes

2-1/2-inch through 6-inches shall have 10-position lever operators with locks, and sizes 8-inch through 24-inch shall have gear operators with position indicator. Provide wafer type valve.

Drill and tap valves on dead-end service or requiring additional body strength. Valve shall be capable of bi-directional dead end service with downstream flange removed at full-rated pressure.

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E. Check Valves: Comply with the following requirements:

1. Swing Check Valves - 2-Inches and Smaller: MSS SP-80; Class 125, cast bronze body and cap conforming to ASTM B 62, horizontal swing, Y-pattern, with a bronze disc, and having threaded or solder ends. Valve shall be capable of being reground while the valve remains in the line. Class 150 valves meeting the above specifications may be used with threaded end connections where pressure requires or Class 125 valves are not available.

2.5 VALVE TAGS

A. Brass Valve Tags: Provide 19-gauge polished brass valve tags for all valves with stamp-engraved piping system abbreviation in 1/4-inch high letters and sequenced valve numbers 1/2-inch high, and with 5/32-inch hole for fastener.

1. Provide 1-1/2-inch diameter tags, except as otherwise indicated.

2. Fill tag engraving with black enamel.

B. Valve Tag Fasteners: Manufacturer's standard solid brass chain (wire link or beaded type), or solid brass S-hooks of the sizes required for proper attachment of tags to valves, and manufactured specifically for that purpose.

2.6 METERS AND GAUGES

A. Pressure Gauges:

1. General: Provide pressure gauges of materials, capacities, and ranges indicated, designed and constructed for use in service indicated.

2. Type: General use, ±1% accuracy, ANSI B 40.1 Grade 1A, phosphor bronze bourdon type, bottom connection.

3. Case: Stainless steel, glass or acrylic lens, 4-1/2-inch diameter.

4. Connector: Brass, lower mount with 1/4-inch male NPT.

5. Scale: White coated aluminum, with permanently etched black markings.

6. Accessories:

a. Provide each gauge with a shut-off needle valve.

b. Provide pressure snubber where spikes may be present.

7. Range: Conform to the following:

a. Water: 0-100 PSI.

8. Acceptable Manufacturers:

a. Marsh Gauges.

b. Moeller Instruments.

c. Miljoco Corporation.

d. Weiss Instruments.

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2.7 SUPPORTS AND ANCHORS

A. Horizontal-Piping Hangers and Supports:

1. General: Except as otherwise indicated, provide factory- fabricated horizontal-piping hangers and supports complying with MSS SP-58, of one (1) of the following MSS types listed, selected by Installer to suit horizontal-piping systems, in accordance with MSS SP-69 and manufacturer's published product information. Use only one (1) type by one (1) manufacturer for each piping service. Select size of hangers and supports to exactly fit pipe size for bare piping, and to exactly fit around piping insulation with saddle or shield for insulated piping.

Provide copper-plated hangers and supports for copper-piping systems.

2. Adjustable Steel Clevis Hangers: MSS Type 1.

3. Steel Pipe Clamps: MSS Type 4.

4. Pipe Hangers: MSS Type 5.

B. Saddles and Shields:

1. General: Except as otherwise indicated, provide saddles or shields under piping hangers and supports, factory-fabricated, for all insulated piping. Size saddles and shields for exact fit to mate with pipe insulation.

2. Protection Saddles: MSS Type 39; fill interior voids with segments of insulation matching adjoining insulation.

3. Protection Shields: MSS Type 40; of length recommended by manufacturer to prevent crushing of insulation.

4. Thermal Hanger Shields: Constructed of 360 degree insert of high density, 100 PSI, water-proofed calcium silicate, encased in 360 degree sheet metal shield. Provide assembly of same thickness as adjoining insulation.

PART 3 - EXECUTION

3.1 PIPING SYSTEMS-COMMON REQUIREMENTS

A. General: Install piping as described below, except where system Sections specify otherwise.

B. General Locations and Arrangements: Drawings (plans, schematics, and diagrams) indicate general location and arrangement of piping systems. Indicated locations and arrangements were used to size pipe and calculate friction loss, expansion, pump sizing, and other design considerations. Install piping as indicated, except where deviations to layout are approved on coordination drawings.

C. Install piping at indicated slope.

D. Install components having pressure rating equal to or greater than system operating pressure.

E. Install piping in concealed interior locations, except in equipment rooms and service areas.

F. Install piping free of sags and bends.

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G. Install exposed interior piping at right angles or parallel to building walls. Diagonal runs are prohibited, except where indicated.

H. Install piping tight to slabs, beams, joists, columns, walls, and other building elements. Allow sufficient space above removable ceiling panels to allow for ceiling panel removal.

I. Install piping to allow application of insulation plus 1-inch clearance around insulation.

J. Locate groups of pipes parallel to each other, spaced to permit valve servicing.

K. Install fittings for changes in direction and branch connections.

L. Install couplings according to manufacturer's printed instructions.

M. Sleeves are not required for core drilled holes.

N. Piping Joint Construction: Join pipe and fittings as follows and as specifically required in individual piping system Sections.

1. Ream ends of pipes and tubes and remove burrs. Bevel plain ends of steel pipe.

2. Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before assembly.

3. Soldered Joints: Construct joints according to AWS "Soldering Manual," Chapter 22 "The

Soldering of Pipe and Tube."

4. Threaded Joints: Thread pipe with tapered pipe threads according to ASME B1.20.1. Cut threads full and clean using sharp dies. Ream threaded pipe ends to remove burrs and restore full inside diameter. Join pipe fittings and valves as follows:

a. Note the internal length of threads in fittings or valve ends, and proximity of internal seat or wall, to determine how far pipe should be threaded into joint.

b. Apply appropriate tape or thread compound to external pipe threads (except where dry seal threading is specified).

c. Align threads at point of assembly.

d. Tighten joint with wrench. Apply wrench to valve end into which pipe is being threaded.

e. Damaged Threads: Do not use pipe or pipe fittings having threads that are corroded or damaged. Do not use pipe sections that have cracked or open welds.

O. Piping Connections: Except as otherwise indicated, make piping connections as specified below.

1. Install unions in piping 2-inch (50mm) and smaller adjacent to each valve and at final connection to each piece of equipment having a 2-inch (50mm) or smaller threaded pipe connection.

2. Install flanges in piping 2-1/2-inches (65mm) and larger adjacent to flanged valves and at final connection to each piece of equipment having flanged pipe connection.

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3. Wet Piping Systems (Water and Steam): Install dielectric coupling and nipple fittings to connect piping materials of dissimilar metals.

4. Electrical Equipment Spaces: Do not run piping through transformer vaults and other electrical or electronic equipment spaces and enclosures unless unavoidable. Install drip pan under piping that must be run through electrical spaces.

5. Install isolation valves upstream of all dielectric unions and flanges.

3.2 VALVE SELECTION

A. Selection of Valve Ends (Pipe Connections): Except as otherwise indicated, select valves with the following ends or types of pipe/tube connections:

1. Copper Tube Size 2-Inch and Smaller: Solder ends, except in heating hot water and low pressure steam service which shall have threaded ends.

2. Steel Pipe Sizes 2-Inch and Smaller: threaded or grooved-end.

3.3 VALVE INSTALLATIONS

A. General Application: Use gate, ball, and butterfly valves for shut-off duty; globe, ball, and butterfly for throttling duty. Refer to piping system specification sections for specific valve applications and arrangements.

B. Locate valves for easy access and provide separate support where necessary.

C. Install valves in horizontal piping with stem at or above the center of the pipe, and to allow full stem movement.

D. Installation of Check Valves: Install for proper direction of flow as follows:

1. Swing Check Valves: Install in horizontal position with hinge pin level.

E. Valve Schedule:

1. Shut-off Valves:

a. 2-inch and Smaller: Ball valves.

b. 2-1/2-inch and Larger: Gate or butterfly valves.

F. Valve Locations:

1. Plumbing Piping:

a. Sectional Valves: Install on each branch and riser, close to main, where branch or riser serves two (2) or more plumbing fixtures or equipment connections, and elsewhere as indicated.

b. Shut-off Valves: Install on inlet of each plumbing equipment item, and on inlet of each plumbing fixture, and elsewhere as indicated.

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3.4 VALVE PRESSURE/TEMPERATURE CLASSIFICATION SCHEDULES

VALVES 2-INCHES AND SMALLER

SERVICE GATE GLOBE BALL CHECK

Domestic Hot & Cold Water 125 125 150 125

VALVES 2-1/2-INCHES AND LARGER

SERVICE GATE GLOBE BUTTERFLY CHECK

Domestic Hot & Cold Water 125 125 200 125

3.5 PIPING SPECIALTIES INSTALLATION

A. Y-Type Strainers: Install Y-type strainers full size of pipeline, in accordance with manufacturer's installation instructions. Install pipe nipple and shut-off valve in strainer blow-down connection, full size of connection, except for strainers 2-inch and smaller installed ahead of control valves feeding individual terminals. Where indicated, provide drain line from shut-off valve to plumbing drain, full size of blow-down connection.

1. Locate Y-type strainers in supply line ahead of the following equipment, and elsewhere as indicated, if integral strainer is not included in equipment:

a. Water Softener.

B. Dielectric Unions: Install at each piping joint between ferrous and nonferrous piping. Comply with manufacturer's installation instructions.

1. Install isolation valves upstream of all dielectric unions.

3.6 METERS AND GAUGES INSTALLATION

A. Pressure Gauges:

1. General: Install pressure gauges in piping tee with pressure gauge cock, located on pipe at most readable position.

2. Locations: Install in the following locations, and elsewhere as indicated:

a. At discharge of each pressure reducing valve.

b. Across inlet and outlet of each hydronics coil of air handling units and built-up central systems.

3.7 SUPPORTS AND ANCHORS INSTALLATION

A. Hangers and Supports:

1. General: Install hangers, supports, clamps and attachments to support piping properly from building structure; comply with MSS SP-69. Arrange for grouping of parallel runs of horizontal piping to be supported together on trapeze type hangers where possible. Install supports with maximum spacings complying with MSS SP-69. Where piping of various sizes is to be supported together by trapeze hangers, space hangers for smallest pipe size or install intermediate supports for smaller diameter pipe. Do not use wire or perforated metal to support piping, and do not support piping from other piping. Piping shall not be supported from

(092036) 22 05 00-9 (Repair AHU O-Club, B462) bottom cord of bar joist or from metal roof deck. Piping may be supported at panel points of bar joists.

2. Install hangers and supports complete with necessary inserts, bolts, rods, nuts, washers and other accessories. Except as otherwise indicated for exposed continuous pipe runs, install hangers and supports of same type and style as installed for adjacent similar piping.

3. Powder-actuated fasteners shall be approved only for installation where load will be applied perpendicular to the fasteners. Powder-actuated fasteners shall not be used where load will be applied to axially to the fasteners.

4. Prevent electrolysis in support of copper tubing by use of hangers and supports which are copper plated, or by other recognized industry methods.

B. Saddles and Shields:

1. Insulated Piping: Comply with the following installation requirements:

a. Shields: Where low-compressive-strength insulation or vapor barriers are indicated on cold or chilled water piping, install coated protective shields. For pipe 8-inch and over, install wood insulation saddles.

b. Saddles: Where insulation without vapor barrier is indicated, install protection saddles.

3.8 CUTTING AND PATCHING

A. Cut, channel, chase, and drill floors, walls, partitions, ceilings, and other surfaces necessary for mechanical installations. Perform cutting by skilled mechanics of the trades involved.

B. Repair cut surfaces to match adjacent surfaces.

END OF SECTION