ࡱ> z|y ^bjbj AucucVDLL8D# T 6.w p  !!!p5r5r5r5r5r5r5$7795!!!!!5 5"%%%!  4%!p5%%1 $3 pyҡ"2$45< 624:#8: $3:$3h!!%!!!!!55%!!! 6!!!!:!!!!!!!!!L Y: Copyright 2010 by The American Institute of Architects (AIA) Exclusively published and distributed by Architectural Computer Services, Inc. (ARCOM) for the AIA SECTION 23 21 13.13 - UNDERGROUND HYDRONIC PIPING Revise this Section by deleting and inserting text to meet Project-specific requirements. Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed. GENERAL Note to Engineer: These specifications are minimum requirements and may be adjusted or added to by the engineer of record as he sees fit according to the project requirements. RELATED DOCUMENTS Retain or delete this article in all Sections of Project Manual. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division01 Specification Sections, apply to this Section. SUMMARY Section Includes: Plastic pipe and fittings. Transition fittings. Loose-fill insulation. Cellular foam glass insulation Pre-insulated piping PERFORMANCE REQUIREMENTS Provide components and installation capable of producing hydronic piping systems with the following minimum working-pressure ratings: Revise pressure ratings in three subparagraphs below. Coordinate with Section232113 "Hydronic Piping." Working pressure is equal to relief pressure plus the static height of the system and pumping head. The only working pressure mandated by authorities having jurisdiction is for makeup water. Hot-Water Piping: [100 psig (690 kPa)] [150 psig (1035 kPa)] at [200 degF (93 degC)] . Chilled-Water Piping: [100 psig (690 kPa)] [150 psig (1035 kPa)] at [200 degF (93 degC)] . Condenser-Water Piping: [100 psig (690 kPa)] [150 psig (1035 kPa)] at [150 degF (66 degC)] . ACTION SUBMITTALS Product Data: For the following: Cellular Glass Insulation Loose-fill insulation Hydronic piping Pre-insulated piping LEED Submittals: Retain subparagraph below if low-emitting materials are required for LEEDCreditEQ4.1; coordinate with requirements selected in Part2 for adhesives. Product Data for CreditEQ4.1: For adhesives, documentation including printed statement of VOC content and chemical components. Shop Drawings: For underground hydronic piping. Signed and sealed by a professional engineer. Show pipe sizes, locations, and elevations. Show piping in trench, conduit, and cased pipe with details showing clearances between piping, and show insulation thickness. INFORMATIONAL SUBMITTALS Retain "Profile Drawings" Paragraph below if profiles are not shown on Drawings. Profile Drawings: Show system piping in elevation. Draw profiles at horizontal scale of not less than 1 inch equals 50 feet (1:500) and at vertical scale of not less than 1 inch equals 5 feet (1:50). Indicate manholes and piping. Show types, sizes, materials, and elevations of other utilities crossing hydronic piping. Coordinate "Qualification Data" Paragraph below with qualification requirements in Section014000 "Quality Requirements" and as supplemented in "Quality Assurance" Article. Qualification Data: For qualified Installer. Retain "Welding certificates" Paragraph below if retaining procedures for welder certification in "Quality Assurance" Article. QUALITY ASSURANCE Retain "Fiberglass Pipe and Fitting Installers" Paragraph below for fiberglass pipe assembly. Retain "Welding Qualifications" Paragraph below if shop or field welding is required. If retaining, also retain "Welding certificates" Paragraph in "Informational Submittals" Article. Certify that each installer has been trained by the manufacturers representative for fusion piping installation. PRODUCTS See "Writing Guide" Article in the Evaluations for a discussion of this Section's organization and the most efficient way to revise this Section. PLASTIC PIPE AND FITTINGS Retain this article for direct-bury piping or to describe materials for carrier pipe for conduit or cased piping. See "Plastic Piping" Article in the Evaluations for discussion of product characteristics and maximum temperatures. POLYPROPYLENE (PP-R) PIPE AND FITTINGS FOR WATER DISTRIBUTION AND WATER SERVICE Pipe shall be manufactured from a PP-R resin (Fusiolen) meeting the short-term properties and long-term strength requirements of ASTM F 2389. The pipe shall contain no rework or recycled materials except that generated in the manufacturer's own plant from resin of the same specification from the same raw material. All pipe shall be made in an extrusion process. Domestic hot water shall contain a fiber layer (faser) to restrict thermal expansion. All pipe shall comply with the rated pressure requirements of ASTM F 2389. All pipe shall be certified by NSF International as complying with NSF 14, NSF 61, and ASTM F 2389 or CSA B137.11. Pipe shall be Aquatherm Green Pipe, Green Pipe MF (Faser), Blue Pipe MF, Blue Pipe PP-RCT or Lilac Pipe available from Aquatherm, NA. Piping specifications and ordering information are available at  HYPERLINK "http://www.aquatherm.com" www.aquatherm.com. Fittings shall be manufactured from a PP-R resin (Fusiolen) meeting the short-term properties and long-term strength requirements of ASTM F 2389. The fittings shall contain no rework or recycled materials except that generated in the manufacturer's own plant from resin of the same specification from the same raw material. All fittings shall be certified by NSF International as complying with NSF 14, NSF 61, and ASTM F 2389 or CSA B137.11. Polypropylene Fittings: socket fusion, butt fusion, electrofusion, or fusion outlet fittings shall be used for fusion weld joints between pipe and fittings. Mechanical fittings and transition fittings shall be used where transitions are made to other piping materials or to valves and appurtenances. Polypropylene pipe shall not be threaded. Threaded transition fittings per ASTM F 2389 shall be used where a threaded connection is required. Polypropylene pipe used for hot water distribution shall include a fiberglass-reinforced layer to reduce thermal expansion/contraction. Retain "Basis-of-Design Product" Subparagraph and list of manufacturers below to identify a specific product or a comparable product from manufacturers listed. Retain option and delete insert note if manufacturer's name and model number are indicated on Drawings. Plastic, Pipe-Flange Gasket, Bolts, and Nuts: Type and material recommended by piping system manufacturer unless otherwise indicated. TRANSITION FITTINGS Plastic-to-Metal Transition Fittings shall be the following: PP-R one-piece fitting with threaded stainless steel, brass, or copper insert and one PP-R fusion weld joint end. INSULATIONS Granular Loose Fill Insulation Granular, Loose-Fill Insulation: Inorganic, nontoxic, nonflammable, sodium potassium aluminum silicate with calcium carbonate filler. Include chemical treatment that renders insulation hydrophobic. HYPERLINK "http://www.specagent.com/LookUp/?ulid=3763&mf=04&src=wd"Manufacturers: Subject to compliance with requirements, [provide products by one of the following] [available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following]: HYPERLINK "http://www.specagent.com/LookUp/?uid=123456812291&mf=04&src=wd"Gilsulate International, Inc. . Thermal Conductivity (k-Value): 0.60 at 175 degF (0.087 at 79 degC) and 0.65 at 300 degF (0.094 at 149 degC). Application Temperature Range: 35 to 800 degF (2 to 426 degC). Dry Density: 40 to 42 lb/cu. ft. (640 to 672 kg/cu.m). Strength: 12,000 lb/sq. ft. (58600 kg/sq.m). Powder, Loose-Fill Insulation: Inert, nontoxic, nonflammable, calcium carbonate particles. Include chemical treatment that renders insulation hydrophobic. See Editing Instruction No.1 in the Evaluations for cautions about naming manufacturers. Retain first subparagraph and list of manufacturers below. See Section016000 "Product Requirements." HYPERLINK "http://www.specagent.com/LookUp/?ulid=3764&mf=04&src=wd"Manufacturers: Subject to compliance with requirements, [provide products by one of the following] [available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following]: HYPERLINK "http://www.specagent.com/LookUp/?uid=123456812292&mf=04&src=wd"DriTherm International Inc. . Thermal Conductivity (k-Value): ASTMC177, 0.58 at 100 degF (0.084 at 37 degC) and 0.68 at 300 degF (0.098 at 149 degC). Application Temperature Range: Minus 273 to plus 480 degF (Minus 169 to plus 250 degC). Dry Density: Approximately 60 lb/cu. ft. (960 kg/cu.m). Strength: 12,000 lb/sq. ft. (58600 kg/sq.m). Cellular Glass Thermal Insulation: Cellular glass insulation, inert, non-toxic, impermeable, inorganic, noncombustible, cellular glass insulation. ASTM C 522-00 HYPERLINK "http://www.specagent.com/LookUp/?ulid=3764&mf=04&src=wd"Manufacturers: Subject to compliance with requirements, [provide products by one of the following] [available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following]: Pittsburgh Corning . Thermal Conductivity (k-Value): ASTMC177, 0.29 at 75 degF (0.033 at 0 degC). Application Temperature Range: Minus 273 to plus 900 degF (Minus 169 to plus 482 degC). Dry Density: Approximately 7.5 lb/cu. ft. (120 kg/cu.m). Compressive Strength: 90 psi. (6.3 kg/sq.cm2). Spray-on Pipe Insulation Insulation shall be polyurethane foam or polyisocyanurate foam spray applied to the surface of the pipe with a minimum thickness of one inch. Insulation shall be rigid when dried, 90-95% closed cell polyurethane or polyisocyanurate with a 2.0 to 3.0 pounds per cubic foot density and coefficient of thermal conductivity (K- Factor) of 0.16 and shall conform to ASTM C-591. Pre-insulated Pipe Pre-insulated pipe shall be a complete system of factory pre-insulated polypropylene piping for the specified service. Carrier pipe shall be polypropylene PP-R by Aquatherm, conforming to ASTM F-2389 as previously specified herein. Insulation shall be polyurethane foam either spray applied or injected with one shot into the annular space between carrier pipe and jacket with a minimum thickness of one inch. Insulation shall be rigid, 90-95% closed cell polyurethane with a 2.0 to 3.0 pounds per cubic foot density and coefficient of thermal conductivity (K- Factor) of 0.16 and shall conform to ASTM C-591. Jacketing material shall be extruded, black, high density polyethylene (HDPE), having a minimum wall thickness of 100 mils for jacket sizes less than or equal to 12, and 125 mils for jacket sizes larger than 12 to 24. Manufacturers: Subject to compliance with requirements, [provide products by one of the following] [available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following]: Aquatherm TI Pipe Insul-Tek Piping Systems, Inc. Perma-Pipe, Inc. Rovanco Piping Systems, Inc. Thermacor Process, L.P. Tricon Piping Systems, Inc. . EXECUTION EARTHWORK See Section312000 "Earth Moving" for excavating, trenching, and backfilling. PIPING APPLICATION Retain at least one pipe material in paragraphs below for each service required for Project. Services are specified separately to allow different pipe materials and joining methods for each. If materials and methods are the same for all services, combine the requirements by revising the paragraph titles. In general, pipe materials and joining methods in this article are as listed in the 2004 ASHRAE HANDBOOK - "HVAC Systems and Equipment," Ch.41, "Pipes, Tubes, and Fittings." The change point for pipe materials and joining methods is specified, in this master, where the pipe size changes from NPS2 to NPS2-1/2 (DN50 to DN65). Revise this change point to suit office policy. See "Writing Guide" Article in the Evaluations. Hot-Water Heating Piping: [NPS2 (DN50) and smaller] shall be[any of] the following: Retain one or more of first four subparagraphs below. If retaining more than one type of material and joining method and it is not the intent to give Contractor the option to select materials, delete the "any of" option in subparagraph above and identify each material on Drawings. Show points of transition from one material to another. Polypropylene (PP-R), (PP-RCT) ASTM F 2389, pipe and socket fusion, or fusion outlet fittings. Retain "Loose-Fill Insulation" Subparagraph below to insulate bare underground piping. Loose-Fill Insulation: [Granular] [Powder]. Cellular Glass Thermal Insulation Pre-insulated piping [NPS2-1/2 (DN65) and larger] shall be[any of] the following: Retain one or more of first four subparagraphs below. If retaining more than one type of material and joining method and it is not the intent to give Contractor the option to select materials, delete the "any of" option in subparagraph above and identify each material on Drawings. Show points of transition from one material to another. Polypropylene (PP-R), (PP-RCT) ASTM F 2389, pipe and socket fusion, butt fusion, or fusion outlet fittings. Retain "Loose-Fill Insulation" Subparagraph below to insulate bare underground piping. Loose-Fill Insulation: [Granular] [Powder]. Cellular Glass Thermal Insulation Spray-on polyurethane/polyisocyanurate Pre-insulated piping Retain one of two subparagraphs below for factory-insulated underground piping. Chilled-Water Piping: [NPS2 (DN50) and smaller] shall be [any of] the following: Retain one or more of first four subparagraphs below. If retaining more than one type of material and joining method and it is not the intent to give Contractor the option to select materials, delete the "any of" option in subparagraph above and identify each material on Drawings. Show points of transition from one material to another. Polypropylene (PP-R), (PP-RCT) ASTM F 2389, pipe and socket fusion, or fusion outlet fittings. [NPS2-1/2 (DN65) and larger] shall be[any of] the following: Retain one or more of first five subparagraphs below. If retaining more than one type of material and joining method and it is not the intent to give Contractor the option to select materials, delete the "any of" option in subparagraph above and identify each material on Drawings. Show points of transition from one material to another. Polypropylene (PP-R), PP-RCT) ASTM F 2389, pipe and socket fusion, butt fusion, or fusion outlet fittings. Retain "Loose-Fill Insulation" Subparagraph below to insulate bare underground piping. Retain one of two subparagraphs below for factory-insulated underground piping. Condenser-Water Piping: [NPS2 (DN50) and smaller] shall be[any of] the following: Retain one or more of first four subparagraphs below. If retaining more than one type of material and joining method and it is not the intent to give Contractor the option to select materials, delete the "any of" option in subparagraph above and identify each material on Drawings. Show points of transition from one material to another. Polypropylene (PP-R), (PP-RCT) ASTM F 2389, pipe and socket fusion, or fusion outlet fittings. [NPS2-1/2 (DN65) and larger] shall be[any of] the following: Retain one or more of first five subparagraphs below. If retaining more than one type of material and joining method and it is not the intent to give Contractor the option to select materials, delete the "any of" option in subparagraph above and identify each material on Drawings. Show points of transition from one material to another. Polypropylene (PP-R), (PP-RCT) ASTM F 2389, pipe and socket fusion, butt fusion, or fusion outlet fittings. Retain one of two subparagraphs below for factory-insulated underground piping. PIPING INSTALLATION Drawing plans, schematics, and diagrams indicate general location and arrangement of piping systems. Indicate piping locations and arrangements if such were used to size pipe and calculate friction loss, expansion, pump sizing, and other design considerations. Install piping as indicated unless deviations to layout are approved on Coordination Drawings. Installers shall be trained and certified to install the pipe per the manufacturers guidelines. Contact your local Aquatherm representative for training. Remove standing water in the bottom of trench. Do not backfill piping trench until field quality-control testing has been completed and results approved. Install piping at uniform grade of 0.2 percent. Install drains, consisting of a tee fitting, NPS3/4 (DN20) ball valve, and short NPS3/4 (DN20) threaded nipple with cap, at low points and elsewhere as required for system drainage. Install manual air vents at high points. In conduits, install drain valves at low points and manual air vents at high points. Install components with pressure rating equal to or greater than system operating pressure. Install piping free of sags and bends. Install fittings for changes in direction and branch connections. See Section230517 "Sleeves and Sleeve Seals for HVAC Piping" for sleeves and mechanical sleeve seals through exterior building walls. Thrust blocks shall not be required with PP-R piping. Expansion loops shall not be required for direct buried underground PP-R piping. LOOSE-FILL INSULATION INSTALLATION Retain this article for bare pipe installation requiring insulation. Do not disturb the bottom of trench; otherwise, compact and stabilize it to ensure proper support. Remove standing water in the bottom of trench. Bed the pipe on a minimum 6-inch (150-mm) layer of granular fill material with a minimum 6-inch (150-mm) clearance between the pipes. Form insulation trench by excavation or by installing drywall side forms to establish required height and width of the insulation. Support piping with proper pitch, separation, and clearance to backfill or side forms using temporary supporting devices that can be removed after back filling with insulation. Place insulation and backfill after field quality-control testing has been completed and results approved. Pour loose-fill insulation to required dimension agitating insulation to eliminate voids around piping. Remove temporary hangers and supports. Cover loose-fill insulation with polyethylene sheet a minimum of 4 mils (0.10 mm) thick, and empty loose-fill insulation bags on top. Manually backfill 6 inches (150 mm) of clean backfill. If mechanical compaction is required, manually backfill to 12 inches (300 mm) before using mechanical-compaction equipment. 3.5 Cellular Glass Thermal Insulation INSTALLATION Do not disturb the bottom of trench; otherwise, compact and stabilize it to ensure proper support. Remove standing water in the bottom of trench. Bed the pipe on a minimum 6-inch (150-mm) layer of granular fill material (sand) with a minimum 6-inch (150-mm) clearance between the pipes. Insulation and jacketing shall be applied to the piping in 10 segments (maximum) After completion, the segments are rotated 180o and the bottom of the jacketing and butt strips are inspected. Any defects or damage shall be replaced. With new insulation. Jacketing and insulations joints shall be staggered. In larger diameter piping shorter segments can be insulated and jacketed if more practical. Where conditions permit, insulation and jacketing may be applied outside of the trench to sections of piping. Pipe lengths should be insulated in segments. Length of insulation segment should not exceed 10' (3 m). Backfill per manufacturers instructions. JOINT CONSTRUCTION See Section330500 "Common Work Results for Utilities" for basic piping joint construction. Ream ends of pipes and tubes and remove burrs. Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before assembly. Fusion Joints: Fusion join polypropylene pipe in accordance with ASTM D2657, ASTM F 2389, and the manufacturers instructions. Threaded Joints: Thread pipe with tapered pipe threads according to ASMEB1.20.1. Join pipe fittings and valves as follows: Apply appropriate tape or thread compound to external pipe threads unless dry seal threading is specified. Damaged Threads: Do not use pipe or pipe fittings with threads that are corroded or damaged. Do not use pipe sections that have cracked or open welds. Flanged Joints: Select appropriate gasket material, size, type, and thickness for service application. Install gasket concentrically positioned. Use suitable lubricants on bolt threads. Insulation joints made for pre-insulated pipe shall be done in accordance with the insulation manufacturers instructions. IDENTIFICATION Install continuous metallic/plastic underground warning tapes during back filling of trenches for underground hydronic piping. Locate tapes 6 to 8 inches (150 to 200 mm) below finished grade, directly over piping. Alternatively install 8 10 gage copper wire at 6 8 directly over the pipeline. Provide warning tapes above the wire at 6 to 8 below the finished grade directly over the pipeline. See Section312000 "Earth Moving" for warning-tape materials and devices and their installation. FIELD QUALITY CONTROL While still accessible all piping shall be pressure/leak tested to the manufacturers standards. Tests shall be carried out using water, compressed air or a mixture of the two. The test pressure shall be as indicated in the pressure leak testing procedures required by the manufacturer. Any leaks detected shall be repaired at the contractors expense by removing the leaking part and replacing with new parts welded per the pipe manufacturers guidelines. See www.aquatherm.com for additional details and forms B. Prepare test and inspection reports. 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