Spec 33 61 13.19 25_AMDT 0004.pdf

Dexter Dam Adult Fish Facility Upgrades

SECTION TABLE OF CONTENTS

DIVISION 33 - UTILITIES

SECTION 33 61 13.19 25

VALVES, PIPING, AND EQUIPMENT IN VALVE MANHOLES

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 QUALITY ASSURANCE

1.3.1 Detail Drawings

1.3.2 Insulated Sections

1.4 DELIVERY, STORAGE, AND HANDLING

PART 2 PRODUCTS

2.1 STANDARD PRODUCTS

2.2 NAMEPLATES

2.3 ASBESTOS PROHIBITION

2.4 ELECTRICAL WORK

2.5 PIPING AND FITTINGS

2.5.1 General Requirements

2.5.2 Stainless Steel Pipe

2.5.2.1 Nipples

2.5.2.2 Pipe Threads

2.5.3 Fittings

2.5.3.1 Welded Fittings

2.5.3.2 Unions

2.5.3.3 Ball Valves

2.6 VALVES

2.6.1 Steel Valves

2.6.2 Bronze Valves

2.6.2.1 Globe, Gate, and Angle Valves

2.6.2.2 Check Valves

2.6.3 Packing

2.7 STEAM TRAPS

2.7.1 Bucket Traps

2.7.2 Thermostatic Traps

2.8 PRESSURE GAUGES

2.9 DIAL THERMOMETERS

2.10 COATINGS

2.11 INSULATION AND JACKETING

2.11.1 General Provisions

2.11.2 Insulation

2.11.3 Aluminum Jackets

2.11.4 Bands

2.11.5 Insulation for Flanges, Unions, Valves, and Fittings

2.11.6 Vapor Barrier Coating

2.11.7 Finishing Cement

2.11.8 Glass Tape

2.11.9 Plain Weave, Untreated

SECTION 33 61 13.19 25 Page 1

AMD 0004

2.11.10 Knitted, Untreated

2.11.11 Distortion Requirements

2.12 SUMP PUMPS AND DRAINERS

2.12.1 Sump Pumps

2.12.1.1 Motors

2.12.1.2 Controls

2.12.2 High Level Alarm Indicator

2.12.3 Drainers

2.13 CONCRETE VALVE MANHOLES AND ACCESSORIES

2.13.1 Wall and Floor Construction

2.13.2 Manhole Supported Cover(s)

2.13.3 Raised Frame Cover(s)

2.13.4 Concrete Cover

2.13.5 Ladders

2.13.6 Pipe Sleeves

2.13.6.1 Pipe Sleeves Through Valve Manhole Cover

2.13.6.2 Pipe Sleeves for Conduit Penetrations

2.13.7 Pipe Supports

2.14 EXPANSION JOINTS

PART 3 EXECUTION

3.1 EXAMINATION

3.2 SITE WORK

3.2.1 Excavation, Trenching, and Backfilling

3.3 PIPING

3.3.1 General

3.3.2 Welded Joints

3.3.3 Flanged and Threaded Joints

3.3.3.1 Flanged Joints

3.3.3.2 Threaded Joints

3.3.4 Reducing Fittings

3.3.4.1 Horizontal Water Heating Lines

3.3.4.2 Horizontal Steam Lines

3.3.5 Branch Connections

3.3.6 Pipe Supports in Valve Manholes

3.4 WELDING

3.5 COATINGS

3.6 INSULATION

3.6.1 Installation

3.6.2 Insulation on Pipes Passing Through Sleeves

3.6.3 Covering of Insulation in Valve Manholes

3.6.4 Insulation of Piping Accessories in Valve Manholes

3.6.5 Insulation Sealing for Chilled Water Systems

3.6.6 Insulation Thickness

3.7 VALVE MANHOLES AND ACCESSORIES

3.7.1 Piping and Equipment in Valve Manholes

3.7.2 Sump Pumps Installation

3.8 TESTS

-- End of Section Table of Contents --

SECTION 33 61 13.19 25 Page 2

SECTION 33 61 13.19 25

VALVES, PIPING, AND EQUIPMENT IN VALVE MANHOLES

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ALUMINUM ASSOCIATION (AA)

AA H35.1/35.1M (2017) American National Standard Alloy and Temper Designation Systems for Aluminum

AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME)

ASME B1.20.1 (2013; R 2018) Pipe Threads, General Purpose (Inch)

ASME B16.3 (2021) Malleable Iron Threaded Fittings, Classes 150 and 300

ASME B16.9 (2018) Factory-Made Wrought Buttwelding Fittings

ASME B16.11 (2016) Forged Fittings, Socket-Welding and Threaded

ASME B16.34 (2021) Valves - Flanged, Threaded and Welding End

ASME B31.1 (2020) Power Piping

ASME B40.100 (2013) Pressure Gauges and Gauge Attachments

ASME BPVC SEC IX (2017; Errata 2018) BPVC Section IX-Welding, Brazing and Fusing Qualifications

ASTM INTERNATIONAL (ASTM)

ASTM A53/A53M (2020) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A123/A123M (2017) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A733 (2016) Standard Specification for Welded and Seamless Carbon Steel and Austenitic Stainless Steel Pipe Nipples

SECTION 33 61 13.19 25 Page 3

ASTM B209 (2014) Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

ASTM C449 (2007; R 2013) Standard Specification for Mineral Fiber Hydraulic-Setting Thermal Insulating and Finishing Cement

ASTM C533 (2017) Standard Specification for Calcium Silicate Block and Pipe Thermal Insulation

ASTM C547 (2019) Standard Specification for Mineral Fiber Pipe Insulation

ASTM C552 (2022) Standard Specification for Cellular Glass Thermal Insulation

ASTM C647 (2008; R 2013) Properties and Tests of Mastics and Coating Finishes for Thermal Insulation

ASTM D2822/D2822M (2005; R 2011; E 2011) Standard Specification for Asphalt Roof Cement, Asbestos-Containing

ASTM D3278 (1996; R 2011) Flash Point of Liquids by Small Scale Closed-Cup Apparatus

ASTM D3359 (2017) Standard Test Methods for Rating Adhesion by Tape Test

ASTM E84 (2020) Standard Test Method for Surface Burning Characteristics of Building Materials

ASTM E96/E96M (2022) Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials

ASTM F1139 (1988; R 2019) Steam Traps and Drains

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS

INDUSTRY (MSS)

MSS SP-25 (2018) Standard Marking System for Valves, Fittings, Flanges and Unions

MSS SP-45 (2020) Bypass and Drain Connections

MSS SP-58 (2018) Pipe Hangers and Supports - Materials, Design and Manufacture, Selection, Application, and Installation

MSS SP-72 (2010a) Ball Valves with Flanged or Butt-Welding Ends for General Service

MSS SP-80 (2019) Bronze Gate, Globe, Angle and Check Valves

SECTION 33 61 13.19 25 Page 4

MSS SP-83 (2014) Class 3000 Steel Pipe Unions Socket Welding and Threaded

MSS SP-110 (2010) Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2020; ERTA 20-1 2020; ERTA 20-2 2020;

ERTA 20-3 2020; TIA 20-1; TIA 20-2; TIA

20-3; TIA 20-4; TIA 20-5; TIA 20-6; TIA

20-7; TIA 20-8; TIA 20-9; TIA 20-10; TIA

20-11; TIA 20-12; TIA 20-13; TIA 20-14;

TIA 20-15; TIA 20-16; ERTA 20-4 2022)

National Electrical Code

NFPA 90A (2021) Standard for the Installation of Air Conditioning and Ventilating Systems

SOCIETY FOR PROTECTIVE COATINGS (SSPC)

SSPC Paint 29 (2002; E 2004) Zinc Dust Sacrificial Primer, Performance-Based

SSPC SP 10/NACE No. 2 (2015) Near-White Blast Cleaning

UNDERWRITERS LABORATORIES (UL)

UL 723 (2018) UL Standard for Safety Test for Surface Burning Characteristics of Building Materials

1.2 SUBMITTALS

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-02 Shop Drawings

Detail Drawings; G

SD-03 Product Data

Support of the Equipment

Piping and Fittings

Valves

Insulation

Sump Pumps and Drainers

Expansion Joints

SECTION 33 61 13.19 25 Page 5

SD-04 Samples

Insulated Sections; G

SD-10 Operation and Maintenance Data

Valve Manholes and Accessories; G

Data Package 2; G

1.3 QUALITY ASSURANCE

1.3.1 Detail Drawings

Submit detail drawings 60 days after notice to proceed for valve manholes and the piping and equipment in the valve manholes, such as steam traps, valves, sump pumps, pressure gauges, thermometers and insulation, including a complete list of equipment and materials, manufacturer's descriptive and technical literature, performance charts and curves, catalog cuts, installation instructions, and complete wiring and schematic diagrams. Show on the drawings pipe anchors and guides, and layout and anchorage of equipment and appurtenances in valve manholes, and equipment relationship to other parts of the work including clearances for maintenance and operation.

1.3.2 Insulated Sections

Submit sample sections, 60 days after notice to proceed, for insulation of pipe, elbow, tee, valve, support point, and terminating points. After approval of materials and prior to insulation of piping, prepare a display of insulated sections showing compliance with specifications and showing fastening, sealing, jacketing, straps, waterproofing, supports, hangers, anchors, and saddles. Display approved display sample sections at the jobsite during the construction period until no longer needed by Contracting Officer, then removed.

1.4 DELIVERY, STORAGE, AND HANDLING

Protect all materials and equipment delivered and placed in storage from the weather, excessive humidity, and excessive temperature variation;

dirt, dust, or other contaminants.

PART 2 PRODUCTS

2.1 STANDARD PRODUCTS

Provide materials and equipment which are the standard products of a manufacturer regularly engaged in the manufacture of such products and that essentially duplicate items that have been in satisfactory use for at least 2 years prior to bid opening.

Equipment items must be supported by service organizations. Submit a certified list of qualified permanent service organizations for support of the equipment which includes their addresses and qualifications. These service organizations must 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.

SECTION 33 61 13.19 25 Page 6

2.2 NAMEPLATES

Supply each major item of equipment such as sump pump, motor, steam trap, and pressure reducing valve with the manufacturer's name, address, type or style, model or serial number, and catalog number on a plate secured to the item of equipment.

2.3 ASBESTOS PROHIBITION

Asbestos and asbestos-containing products are not allowed.

2.4 ELECTRICAL WORK

Provide motors, manual or automatic motor control equipment, and protective or signal devices required for the operation specified under this section in accordance with NFPA 70 .

2.5 PIPING AND FITTINGS

2.5.1 General Requirements

Provide piping, fittings and piping accessories inside the valve manholes suitable for the working pressure and temperature requirements of the system conforming to ASME B31.1 . To the greatest extent possible, match the piping and fittings inside the valve manholes to the piping and fittings located on the outside of the valve manhole. Provide stainless steel piping in valve manholes with joints welded except that joints 3/4 inch and smaller may be threaded. When threaded joints are used on High Temperature Water Systems, seal weld (continuous fillet weld) the interface area where the pipe threads meet the threaded fittings to preclude any water leakage. Do not attach supports, anchors, or stays to any piping system in places where either the installation of or the movement of the pipe and its contents will cause damage to the construction. Provide schedule 40 type for pipe up to and including 10 inches in diameter. Provide 0.375 inch nominal wall thickness for pipe 12 inches in diameter and greater. Provide schedule 80 type for gauge piping, sump pump discharge, and piping 3/4 inch in diameter and smaller.

2.5.2 Stainless Steel Pipe

Provide stainless steel pipe conforming to the requirements in 40 05 13.00 25 PIPELINES, LIQUID PROCESS PIPING paragraph STAINLESS STEEL PIPING SYSTEM. Provide black steel, seamless or electric-resistance welded, conforming to the requirements of ASTM A53/A53M, Grade B or ASTM A106/A106M , Grade B. Provide schedule 40 type for pipe up to and including 10 inches in diameter. Provide 0.375 inch nominal wall thickness for pipe 12 inches in diameter and greater. Provide schedule 80 type for gauge piping sump pump discharge and piping 3/4 inch in diameter and smaller.

2.5.2.1 Nipples

Provide nipples that conform to ASTM A733 as required to match adjacent piping.

2.5.2.2 Pipe Threads

Provide pipe threads that conform to ASME B1.20.1 . Use pipe threads only on pipe 3/4 inch or smaller.

SECTION 33 61 13.19 25 Page 7

2.5.3 Fittings

Provide fittings, valves, flanges and unions with the manufacturer's trademark affixed in accordance with MSS SP-25 so as to permanently identify the manufacturer.

2.5.3.1 Welded Fittings

Provide welded fittings to match connecting pipes with butt welded fittings, conforming to ASME B16.9 , and socket welded fittings, conforming to ASME B16.11 .

2.5.3.2 Unions

Provide unions that conform to MSS SP-83 as required to match adjacent piping.

2.5.3.3 Ball Valves

Provide ball valves having flanged or buttwelded end connections conforming to MSS SP-72 ; provide ball valves having threaded end connections conforming to MSS SP-110 .

2.6 VALVES

Provide valves that conform to the material, fabrication, and operating requirements of ASME B31.1 , unless otherwise specified. Provide valves suitable for the service temperatures and pressures utilized. Provide valves for hot water that conform to ASME B31.1 Class 150 , as suitable for service temperatures and pressures utilized. Valves 3/4 inch and smaller may be bronze where seal welding is not required. Provide valves 6 inches and larger with a 1 inch minimum gate or globe bypass valve sized in conformance with MSS SP-45 .

2.6.1 Steel Valves

Provide steel globe, gate, angle, and check valves that conform to the requirements of ASME B16.34 and ASME B31.1 for the service temperatures and pressures utilized. Provide gate valves 2-1/2 inches and smaller with a rising stem. Provide gate valves 3 inches and larger with an outside screw and yoke.

2.6.2 Bronze Valves

2.6.2.1 Globe, Gate, and Angle Valves

Provide bronze globe, gate, and angle valves that conform to MSS SP-80 , union bonnet type.

2.6.2.2 Check Valves

Provide bronze check valves that conform to MSS SP-80 .

2.6.3 Packing

Provide asbestos free valve packing. Provide die-formed, ring type specifically designated valve stem packing suitable for service temperatures and pressures utilized. Provide polytetrafluoroethylene packing that has a with minimum 50 percent graphite filament. Provide

SECTION 33 61 13.19 25 Page 8 valves 1-1/2 inches and smaller with four or five packing rings and provide valves 2 inches and larger with at least six packing rings.

Spiral or continuous packing will not be acceptable. Provide a metal insert having proper clearance around the valve stem at the bottom of the stuffing box and acting as a base for the packing material. Provide one piece construction with provisions for not less than two bolts for packing adjustment, with a liner of noncorrosive material for packing glands.

2.7 STEAM TRAPS

Provide fail open traps with trap bodies suitable for a working pressure of not less than 1.5 times the steam supply pressure, but not less than 200 psi.

2.7.1 Bucket Traps

Provide inverted-bucket type bucket traps with automatic air discharge conforming to ASTM F1139.

2.7.2 Thermostatic Traps

Provide thermostatic traps that have a bimetallic element with automatic air discharge conforming to ASTM F1139.

2.8 PRESSURE GAUGES

Provide pressure gauges that conform to ASME B40.100 with a minimum dial size of 4-1/4 inches. Provide each gauge with a throttling type needle valve or a pulsation dampener and shut-off valve.

2.9 DIAL THERMOMETERS

Provide dial type thermometers 3-1/2 inches in diameter with stainless steel case, remote-type bulb or direct-type bulb as required. Provide thermometers that have an accuracy of plus or minus 2 degrees F. Provide thermometer wells of the separable socket type for each thermometer with a direct-type bulb. Provide thermometer with a white face with black digits graduated in 2 degrees F increments.

2.10 COATINGS

Coat steel manhole piping with an organic zinc undercoat that conforms to SSPC Paint 29 Type II followed by a thermal barrier coating having a manufacturer’s documented minimum thermal conductivity of 0.058 Btu/hr•ft•°F. Provide the undercoat and thermal barrier coating with a continuous use service temperature rating that exceeds the nominal system operating temperature by a minimum of 50 degrees F.

2.11 INSULATION AND JACKETING

2.11.1 General Provisions

Insulate piping, fittings, valves, etc., in the valve manholes. Provide insulation premolded, precut or job fabricated to fit and be removable and reusable. Provide thickness of insulation in accordance with Tables 1 and

2. Provide insulation jackets for all pipe and fitting insulation.

SECTION 33 61 13.19 25 Page 9

2.11.2 Insulation

Provide piping, fittings, and valves with molded calcium silicate insulation conforming to ASTM C533, Type I, or molded mineral fiber insulation conforming to ASTM C547, Class 2, or cellular glass insulation conforming to ASTM C552. Do not use laminated construction unless the thickness exceeds 4 inches. Insulation manufacturers approved for use are:

a. Delta, available from Rockwool in Leeds, Alabama.

b. MPT-PC and MPT-PF, available from Mineral Products of Texas in Houston, TX.

c. Thermo-12, Super Caltemp, available from Johns Manville in Denver, Colorado.

d. Foamglass (cellular glass), available from Pittsburgh Corning Corporation.

2.11.3 Aluminum Jackets

Provide aluminum jackets of smooth sheet, 0.016 inch nominal thickness, that conform to the requirements of ASTM B209, Type 3003, 3105, or 5005.

Supply aluminum jackets that have a factory installed moisture barrier that consists of at least 40 pound kraft paper coated on one side with a 1 mil thick polyethylene film. Provide a jacket with the moisture barrier adhered to the jacket over the entire area of the insulation-side surface.

2.11.4 Bands

Provide bands for aluminum jacket 3/8 inch wide and 32 gauge thickness made of aluminum or annealed stainless steel. Provide bands for insulation 1/2 inch wide and 32 gauge thickness made of annealed stainless steel.

2.11.5 Insulation for Flanges, Unions, Valves, and Fittings

Insulate flanges, unions, valves, and fittings with premolded, prefabricated, or field fabricated segments of insulation of the same material and thickness as the manhole pipe insulation. Provide insulation with essentially the same thermal characteristics and thickness as the adjoining piping.

2.11.6 Vapor Barrier Coating

Provide insulation with a vapor barrier coating that is water resistant, appropriately selected for either outdoor or indoor service, colored white, and has a water vapor permeance of the compound not exceeding 0.05 perm as determined according to Procedure B of ASTM E96/E96M. Provide a coating that is the nonflammable, fire resistant type conforming to ASTM E84, NFPA 90A and UL 723 and has a flash point not less than 80 degrees F as determined in accordance with ASTM D3278. Provide a coating that conforms to ASTM C647; excluding the previous fire resistant requirements.

2.11.7 Finishing Cement

Provide mineral fiber hydraulic-setting thermal insulating cement that conforms with ASTM C449.

SECTION 33 61 13.19 25 Page 10

2.11.8 Glass Tape

Provide tape that conforms to the requirements of UL 723 and ASTM E84.

2.11.9 Plain Weave, Untreated

Provide with the ends interlocked with the picks to ensure no raveling of the tape edges. Provide tape that is an average weight of 5.8 plus or minus 10 percent ounces per square yard, and average thickness of 0.007 plus or minus 0.001 inches. Provide with warp ends or wales of 42 plus or minus 2 per inch or filling picks or courses of 32 plus or minus 2 per inch;

a minimum breaking strength of 150 pounds per inch of width; and after heating to 900 degrees F for 2 hours, a minimum breaking strength of 40 pounds per inch of width.

2.11.10 Knitted, Untreated

Provide with the wales interlocked with the courses to ensure no raveling of the tape edges. Provide tape that is an average weight of 4.5 plus or minus 10 percent ounces per square yard; average thickness of 0.007 plus or minus 0.001 inches; and warp ends/wales of 16 plus or minus 2 per inch.

Use material with minimum breaking strength of 40 pounds per inch of width and, after heating to 900 degrees F for 2 hours, minimum breaking strength of 21 pounds per inch of width.

2.11.11 Distortion Requirements

Distortion of the tape when a sample 24 inches in length is spread across a flat horizontal surface and observed for evidence of distortion (such as tendency to curl rather than lie flat) is not acceptable. The width tolerance is plus or minus 1/8 inch.

2.12 SUMP PUMPS AND DRAINERS

2.12.1 Sump Pumps

Provide a manufacturer's standard commercial product that is electrically driven and submersible, capable of operating while completely submerged, and capable of running without damage when not submerged. The pumps and motors must be capable of continuously pumping liquids at a temperature of 200 degrees F. Provide sump pumps with permanently lubricated bearings, stainless steel shafts, stainless steel impellers, screened inlets and housings of stainless steel . Each sump pump must be capable of passing a 3/8 inch sphere.

2.12.1.1 Motors

Provide motors with overload protection. Provide pumps that are automatically controlled, using control components provided by the pump manufacturer, by a submersible switch assembly with pump wiring and switch suitable for submersion in 200 degrees F liquids. Provide hardwired motor electrical connections.

2.12.1.2 Controls

Provide controls, controllers, water level switches, and electrical connections suitable for service at 100 percent humidity, at 200 degrees F temperature, and occasional water submersion. The sump pumps automatic

SECTION 33 61 13.19 25 Page 11 control switches must have demonstrated 200,000 cycles at 200 degrees F and 100 percent relative humidity while totally submersed in water at 200 degrees F.

2.12.2 High Level Alarm Indicator

Provide another switch to indicate high water level, connected to an emergency warning light mounted on or adjacent to the valve manhole. Set this high water level alarm at a level which is below the bottom of any pipe in the valve manhole. Provide auxiliary contacts in a separate junction box to permit connection to a future Energy Monitoring and Control System (EMCS) for monitoring the operation of each pump motor and the high water level alarm system.

2.12.3 Drainers

Provide automatic type drainers to operate on 125 psig steam supply pressure and actuating when the water level rises sufficiently in the sump, raising the float opening the steam control valve to admit steam to the drainer, resulting in pumping the water from the sump. When the float is lowered by the pumping action, it closes the steam valve, stopping the pumping action until the rising water causes the to float rise again and open the steam valve, starting the cycle over again. Provide each drainer with controls to accomplish the above sequence of operation. Design the automatic float-operated steam valve to prevent dead centering under field conditions and to lengthen the life of the valve seat. Provide the valve with a high grade, renewable composition disc and a stainless steel or hard, noncorrosive bronze renewable seat inserted in the valve body with the drainer constructed of corrosion-resistant copper and bronze. Provide piping from manhole drainers that conforms to ASTM A53/A53M, Weight Class XS (Extra Strong), hot-dip galvanized steel pipe with ASME B16.11 or ASME B16.3 , Class 300, hot-dip galvanized threaded fittings. Provide a steam pressure regulating valve assembly for manhole drainers for operation on steam system above 125 psig.

2.13 CONCRETE VALVE MANHOLES AND ACCESSORIES

2.13.1 Wall and Floor Construction

Provide manhole in accordance with Section 03 42 13.00 10 PLANT-PRECAST CONCRETE PRODUCTS FOR BELOW GRADE CONSTRUCTION. Construct walls and floors of reinforced concrete not less than 8 inches thick. Construct walls using one monolithic pour. Provide floor with an internal sump;

slope the floor in all directions to the sump to allow water collection.

Provide construction joints with water stops.

2.13.2 Manhole Supported Cover(s)

Provide an 5/16 inch thick checker pattern, aluminum solid plate cover that conforms to AA H35.1/35.1M cover that is supported by and is flush with the top of the manhole walls. Construct cover(s) to be removable and sectionalized as indicated. Provide hot-dipped galvanized structural steel supports, anchor bolts, nuts, and washers. Provide a cover and support system that can support a load up to 150 psf . Install an 5/16 inch thick checker pattern, aluminum solid plate cover that conforms to AA H35.1/35.1M on top of the open grating. Attach the checkered plate to the grating with removable, galvanized steel fasteners.

SECTION 33 61 13.19 25 Page 12

2.13.3 Raised Frame Cover(s)

Provide a raised support structure constructed out of hot-dipped galvanized steel that is designed to sit on top of the manhole walls.

Provide an 5/16 inch thick checker pattern, aluminum solid plate cover that conforms to AA H35.1/35.1M . Construct cover(s) to be removable and sectionalized as indicated. Provide ventilation openings as indicated around the entire perimeter below the raised top. Provide hot-dipped galvanized steel lifting lugs on the cover.

2.13.4 Concrete Cover

Provide a 6 inches thick cast concrete cover designed to support loads up to 150 psf . Provide a 4 by 4 foot aluminum access door in the concrete top. Provide two 6 inch goosenecks; terminate one gooseneck inside the manhole within 2 feet of the manhole's floor; terminate the other gooseneck inside the manhole just below the manhole top.

2.13.5 Ladders

Provide steel valve manhole ladders, with nonslip surfaces, and consisting of uprights with steps or rungs. fabricate ladders with two stringers a minimum 3/8 inch thick and 2-1/2 inches wide, and rungs not be less than 16 inches in width, 3/4 inch diameter, spaced 12 inches apart. Anchor the ladders to the wall by means of steel inserts spaced not more than 6 feet apart vertically, and install to provide at least 6 inches of space between the wall and rungs. Galvanize ladders and inserts after fabrication in conformance with ASTM A123/A123M .

2.13.6 Pipe Sleeves

Provide zinc-coated steel pipe, conforming to ASTM A53/A53M, Schedule 40 or standard weight. Install so there is no electrical continuity between the pipe sleeve and the pipe casing.

2.13.6.1 Pipe Sleeves Through Valve Manhole Cover

Provide insulation continuously through sleeves and provide aluminum jacket over the insulation. Provide smooth sheet 0.016 inch nominal thickness aluminum jacket conforming to ASTM B209. Where penetrations in valve manhole tops are required, insulate piping and seal with waterproof coating up to a point flush with the top of the flashing and the end of the insulation. Butt insulation exposed to the weather tightly against the flashing and valve manhole insulation, and extend the aluminum jacket required for piping exposed to the weather 2 inches beyond the insulation to form a counterflashing. Flash and counterflash valve manhole penetrations and apply waterproof coating conforming to ASTM D2822/D2822M , Type I.

2.13.6.2 Pipe Sleeves for Conduit Penetrations

Provide a modular mechanical type sealing assembly between the valve manhole pipe sleeve and the conduit casing . The mechanical seal consists of interlocking elastomeric links shaped to continuously fill the annular space between the casing and sleeve. The link material is a synthetic elastomeric capable of withstanding long term exposure at 400 degrees F without deterioration. Attach the links to each other with corrosion resistant steel bolts, nuts and pressure plates. The link, bolts, nuts and pressure plates must be the product of single manufacturer and

SECTION 33 61 13.19 25 Page 13 furnished as the product of single manufacturer as a package or kit.

2.13.7 Pipe Supports

Provide pipe supports in accordance with MSS SP-58 . Galvanize all pipe supports, including structural cross support members. Chains, straps, or single point supports are not allowed.

2.14 EXPANSION JOINTS

Submit manufacturer's descriptive data and technical literature, performance charts, catalog cuts and installation instructions.

PART 3 EXECUTION

3.1 EXAMINATION

After becoming familiar with all details of the work, verify all dimensions in the field, and advise the Contracting Officer of any discrepancy before performing the work.

3.2 SITE WORK

3.2.1 Excavation, Trenching, and Backfilling

Excavate, trench, and backfill the valve manholes as indicated and in accordance with Section 31 00 00.00 25 EARTHWORK.

3.3 PIPING

3.3.1 General

Use steel piping and insulate in valve manholes. Protect insulation with an aluminum jacket , except for chilled water lines where indicated not to be insulated. Cut pipe to measurements established at the site and work into place without springing or forcing. Clear all openings and equipment, and avoid cutting or other weakening of structural members to facilitate piping installation. Remove burrs from ends of pipe by reaming. Install to permit free expansion and contraction without damage to joints or hangers and in accordance with ASME B31.1 . Do not attach supports, anchors, or stays where either expansion or the weight of the pipe could cause damage to permanent construction. The method of attaching supports must not interfere with the operation of the cathodic protection system.

3.3.2 Welded Joints

Weld all pipe joints for piping in valve manholes, except joints at traps, strainers, and at valves and piping 3/4 inch and smaller which may be threaded. Conform welding to the requirements specified in paragraph

WELDING.

3.3.3 Flanged and Threaded Joints

3.3.3.1 Flanged Joints

Flanged joints are permitted for dielectric isolation only. Construct flanged joints to be faced true, provided with gaskets, and made perfectly square and tight. Use flanged joints only for electrical isolation and in

SECTION 33 61 13.19 25 Page 14 other special cases where connected equipment is available with only flanged joints, or when specifically indicated. Provide electrically isolated flange joints at all connections to or from the heat distribution system and between dissimilar metals.

3.3.3.2 Threaded Joints

Apply graphite or inert filler and oil, graphite compound, or polytetrafluoroethylene tape to the male threads only. Provide unions at all screwed valves, strainers and connections to equipment 3/4 inch and smaller. Use dielectric unions at connections of dissimilar metals in 3/4 inch and smaller piping. When used on High Temperature Water Systems, seal weld threaded joints.

3.3.4 Reducing Fittings

3.3.4.1 Horizontal Water Heating Lines

Provide eccentric reducers for all pipe size changes. Provide eccentric type reducing fittings to maintain the tops of adjoining pipes at the same level.

3.3.4.2 Horizontal Steam Lines

Provide eccentric reducers for all pipe size changes. Provide eccentric type reducing fittings to maintain the bottoms of adjoining pipes at the same level.

3.3.5 Branch Connections

Branch off top of mains as indicated providing unrestricted circulation, elimination of air pockets, and permitting the complete drainage of the system. Branch connections may be made with either welding tees or forged branch outlet fittings. If branch outlet fittings are used, provide forged fittings no larger than two nominal pipe sizes smaller than the main run. Reinforce branch outlet fittings to withstand external strains and designed to withstand full pipe bursting strength.

3.3.6 Pipe Supports in Valve Manholes

Securely support horizontal and vertical runs of pipe in valve manholes.

3.4 WELDING

Weld pipe in accordance with qualified procedures, using performance qualified welders and welding operators. Procedures and welders must be qualified in accordance with ASME BPVC SEC IX . Welding procedures qualified by others, and welders and welding operators qualified by another employer may be accepted as permitted by ASME B31.1 . Notify the Contracting Officer 24 hours in advance of tests and perform the tests at the work site. The welder or welding operator must apply his assigned symbol near each weld he makes as a permanent record. Weld structural members in accordance with Section 05 05 23.16 STRUCTURAL WELDING.

3.5 COATINGS

Prepare the steel piping surface by abrasive blasting to the near-white metal grade in conformance with SSPC SP 10/NACE No. 2 . Within eight hours of blasting, or prior to any condensation of moisture or other surface

SECTION 33 61 13.19 25 Page 15 deterioration whichever occurs first, coat all surfaces with an organic zinc primer conforming to SSPC Paint 29 Type II. Spray apply the primer to a minimum thickness at any point of 4 mils. Allow the primer to cure according to the manufacturer’s recommendations prior to overcoating with the thermal barrier coating. Provide thermal barrier coating having film forming properties, an adhesion value of 5 when tested according to ASTM D3359 and a minimum thermal conductivity of 0.058 Btu/hr•ft•°F.

Spray apply the thermal barrier coating in accordance with manufacturers recommendations to a minimum thickness at any point of 50 mils.

3.6 INSULATION

Install insulation so that it is not damaged by pipe expansion or contraction. Keep insulation drybefore, during, and after installation.

Groove insulation installed over welds to assure a snug fit. Hold insulation in place with stainless steel straps. Install a minimum of 2 bands on each individual length of insulation, with maximum spacing not exceeding 18 inch centers.

3.6.1 Installation

Install material in accordance with published installation instructions of the manufacturer. Do not apply insulation materials until piping tests are complete. Prior to application, thoroughly clean surfaces of moisture, grease, dirt, rust, and scale; paint where required.

3.6.2 Insulation on Pipes Passing Through Sleeves

Provide continuous insulation, as required by paragraph PIPE SLEEVES THROUGH VALVE MANHOLE COVER. Provide aluminum jackets over the insulation. When penetrating valve manhole walls, extend aluminum jacket not less than 2 inches beyond the sleeve on each side of the wall and secure with an aluminum band on each side of the wall. Where flashing is provided, secure the jacket with not less than one band located not more than 1 inch from the end of the jacket. When penetrating valve manhole tops, insulate pipe as required for valve manhole service.

3.6.3 Covering of Insulation in Valve Manholes

Cover insulation for pipe, flanges, valves, and fittings with aluminum jackets.

3.6.4 Insulation of Piping Accessories in Valve Manholes

Insulate flanges, couplings, unions, valves, fittings, and other pipe accessories, unless otherwise indicated, with removable and reusable factory premolded, prefabricated, or field fabricated insulation. Provide aluminum sheet over insulation manholes and neatly terminate for accessories that are not to be insulated.

3.6.5 Insulation Sealing for Chilled Water Systems

Seal the ends of insulation with vapor barrier, caulk penetrations and apply caulking to parting line between equipment and removable section insulation. Upon completion of installation of the insulation, including removable sections, apply two coats of vapor barrier coating with a layer of glass cloth embedded between the coats, providing a total dry thickness of the finish of 1/16 inch while maintaining removability of the sections as designed. Apply coating to flanges, unions, valves, anchors, SECTION 33 61 13.19 25 Page 16 fittings and accessories, all terminations, and all insulation not protected by factory vapor barrier jackets or PVC fitting covers. Overlap tape seams 1 inch. Extend the coating out onto the adjoining pipe insulation 2 inches. Taper insulation terminations to unions at a 45-degree angle.

3.6.6 Insulation Thickness

Provide the minimum thickness of insulation for each section of pipe in accordance with Tables 1 and 2.

TABLE 1

Minimum Pipe Insulation Thickness (In inches)

For steam (16 to 408 psig) and High Temperature Hot Water Supply and Return (250 to 450 degrees F)

Nominal Pipe Diameter (inches)

MPT-PC

MPT-PF

Delta Thermo-12 Super Caltemp

Foamglass

1.0 2.0 2.5 4.0 4.5

1.5 2.0 2.5 4.0 4.5

2.0 2.5 3.5 4.5 5.0

2.5 2.5 3.5 4.5 5.0

3.0 3.0 4.0 5.0 6.0

4.0 3.0 4.0 5.0 6.0

5.0 3.0 4.0 5.0 6.0

6.0 3.5 4.5 5.5 6.0

8.0 3.5 4.5 5.5 6.0

10.0 4.0 5.0 6.0 6.5

12.0 4.0 5.0 6.0 6.5

14.0 4.0 5.0 6.0 6.5

16.0 4.0 5.0 6.0 6.5

18.0 4.0 5.0 6.0 6.5

SECTION 33 61 13.19 25 Page 17

TABLE 2

Minimum Pipe Insulation Thickness (In inches)

For Low Pressure Steam (less than 16 psig), Condensate Return and Low Temperature Hot Water (less than 250 degrees F)

Nominal Pipe Diameter (inches)

MPT-PC

MPT-PF

Delta Thermo-12 Super Caltemp

Foamglass

1.0 1.5 2.0 3.0 3.0

1.5 1.5 2.0 3.0 3.0

2.0 1.5 2.0 3.0 3.0

2.5 1.5 2.0 3.0 3.0

3.0 2.0 2.5 3.5 3.5

4.0 2.0 2.5 3.5 3.5

5.0 2.0 2.5 3.5 3.5

6.0 2.5 3.0 4.5 4.5

8.0 2.5 3.0 4.5 4.5

10.0 3.0 4.0 5.0 5.0

12.0 3.0 4.0 5.0 5.0

14.0 3.0 4.0 5.0 5.0

16.0 3.0 4.0 5.0 5.0

18.0 3.0 4.0 5.0 5.0

3.7 VALVE MANHOLES AND ACCESSORIES

3.7.1 Piping and Equipment in Valve Manholes

a. Provide easy access in valve manholes without stepping on piping or equipment, and allow sufficient working area for maintenance work.

Refer to drawings of piping and equipment in valve manholes for installation and support details. Install all globe, angle and gate valves with the stems horizontal or above.

b. Submit Data Package 2 as related to all equipment provided for the project in accordance with Section 01 78 23.00 25 OPERATION AND MAINTENANCE DATA. Detail in the operation manuals the step-by-step procedures required for equipment startup, operation, and shutdown.

Include in the operation manuals the manufacturer's name, model number, parts list, and brief description of all equipment and their basic operating features. List in the maintenance manuals routine maintenance procedures, possible breakdowns and repairs, and troubleshooting guides. Include in the maintenance manuals piping and

SECTION 33 61 13.19 25 Page 18 equipment layout and simplified wiring and control diagrams indicating location of electrical components with terminals designated for wiring, as installed.

c. Installation of valves and equipment on top of the vault is permitted, provided access into the vault is unobstructed and provided in accordance with this specification. Valves and equipment placed outside the vault must be capable of withstand site weather conditions without degradation of functionality. Valve and equipment casing must allow access for maintenance staff to perform routine maintenance in accordance with manufactures recommendations.

3.7.2 Sump Pumps Installation

Install sump pumps as indicated, with all electrical connections hard wired. Connect monitoring of each pump motor and the high water alarm to the Energy Monitoring and Control System (EMCS). Provide dedicated electrical circuits to the sump pumps. Provide all circuit breakers and switches in the electrical power distribution to the sump pumps with the capability of being locked in the "ON" position to be signed as follows.

Stamp the words for the sign on a corrosion resistant metal plate with letters 3/8 inch high, and affix the plate permanently near the switch or circuit breaker.

THIS CIRCUIT SUPPLIES POWER TO THE ELECTRIC SUMP PUMPS IN THE UNDERGROUND

DISTRIBUTION SYSTEM. THIS CIRCUIT MUST BE "ON" AT ALL TIMES; OTHERWISE

EXTENSIVE DAMAGE WILL OCCUR TO THE UNDERGROUND HEAT DISTRIBUTION SYSTEM

AND PREMATURE FAILURE WILL OCCUR.

3.8 TESTS

Perform tests of piping in the valve manholes as part of the testing of the direct buried conduit system. Iinclude the piping in the valve manhole in these tests and perform in accordance with the system supplier's Approved Brochure or the contract specifications.

-- End of Section --

SECTION 33 61 13.19 25 Page 19

1.4 DELIVERY, STORAGE, AND HANDLING

2.6.3 Packing

2.13.7 Pipe Supports

2.14 EXPANSION JOINTS

3.8 TESTS