SECTION HVAC PIPING

Transcription

1 SECTION PART 1 - GENERAL 1.1 SUMMARY A. Work Included: 1. Heating Water Piping, Buried 2. Heating Water Piping, Above Ground 3. Chilled Water Piping, Buried 4. Chilled Water Piping, Above Grade 5. Condenser Water Piping, Buried 6. Condenser Water Piping, Above Ground 7. Thrust Blocking for Underground Preinsulated Chilled Water Piping 8. Anchors for Underground Preinsulated Heating Water Piping 9. Radiant Heating Piping 10. Equipment Drains and Overflows 11. Unions 12. Refrigerant Piping PART 2 - PRODUCTS 2.1 HEATING WATER PIPING, BURIED A. Acceptable Manufacturers: 1. Underground Heating Water Piping Systems: a. Ricwil b. Uponor c. Thermacor d. Rovanco e. Perma-Pipe f. Rehau g. Or approved equivalent. B. Steel Pipe: ASTM A 53/A 53M, Schedule 40, black, Grade B, ERW (Type E) or seamless(type S). 1. Fittings: ASTM A 234/A 234M, wrought steel welding type. a. Make changes in direction with weld fittings. b. Where tee branches are smaller than the mains they join, weld-o-lets may be used. c. Provide weld fittings that are long radius and the same wall thickness as adjacent piping. 2. Joints: Welded in accordance with AWS D Insulation: Polyurethane foam either spray applied or high pressure injected with one shot into the annular space between carrier pipe and jacket. Provide insulation rigid, percent closed cell polyurethane with a 2.0 to 3.0 pounds per cubic foot density and Page 1

2 coefficient of thermal conductivity (K-Factor) of 0.14 and conforming to ASTM C-591. Maximum operating temperature not-to-exceed 250 Degrees F. 4. Jacketing Material: Provide either extruded white polyvinyl chloride, consisting of clean, 1, Grade 1 or high density polyethylene (HDPE). Provide PVC jacket with a wall thickness in mils equal to ten times the nominal jacket diameter and not less than 60 mils. HDPE to have a minimum wall thickness of 125 mils for jacket sizes equal to or less than 12-inches or 150 mils for jacket sizes greater than 12-inch to 24-inch and be used for all jacketing larger than 16-inch. No FRP, HDUP, or tape jacket allowed. 5. Provide jacketing for fittings, valves, etc. of the same material as for piping. 6. Expansion Loop and Ells: c. Provide expansion loops or expansion elbows prefabricated and shipped to the job site in as few pieces as possible (manufacturer's recommendations to govern). d. Provide inner pipe loops and expansion bends cold sprung in the field as required. e. Provide calculations as part of submittals. 7. Moisture Barrier End Seals: Factory applied, sealed to the jacket and carrier pipe. Provide end seals certified as having passed a 20-foot head pressure test. Provide end seals with high temperature mastic completely sealing the exposed end of the insulation. Field C. Steel Pipe Sizes 12-inch and Over: ASTM A 53/A 53M, inch wall, black, Grade B, ERW (Type E) or seamless(type S). 1. Fittings: ASTM A 234/A 234M, wrought steel welding type. a. Changes in direction made with weld fittings. b. Where tee branches are smaller than the mains they join, weld-o-lets may be used. c. Provide weld fittings long radius and the same wall thickness as adjacent piping. 2. Joints: Welded in accordance with AWS D Insulation: Polyurethane foam either spray applied or high pressure injected with one shot into the annular space between carrier pipe and jacket. Insulation rigid, percent closed cell polyurethane with a 2.0 to 3.0 pounds per cubic foot density and coefficient of thermal conductivity (K-Factor) of 0.14 and conforming to ASTM C-591. Maximum operating temperature not-to-exceed 250 Degrees F. 4. Jacketing Material: Provide either extruded white polyvinyl chloride, consisting of clean, 1, Grade 1 or high density polyethylene (HDPE). Provide PVC jacket with a wall thickness in mils equal to ten times the nominal jacket diameter and not less than 60 mils. HDPE to have a minimum wall thickness of 125 mils for jacket sizes equal to or less than 12-inch or 150 mils for jacket sizes greater than 12-inch to 24-inch and used for all jacketing larger than 16-inch. No FRP, HDUP, or tape jacket allowed. 5. Provide jacketing for fittings, valves, etc. of the same material as for piping. 6. Expansion Loop and Ells: c. Provide expansion loops or expansion elbows prefabricated and shipped to the job site in as few pieces as possible (manufacturer's recommendations to govern). d. Provide inner pipe loops and expansion bends cold sprung in the field as required. e. Provide calculations as part of submittals Page 2

3 7. Moisture Barrier End Seals: Factory applied, sealed to the jacket and carrier pipe. End D. Copper Tube: ASTM B 88 (ASTM B 88M), Type K (A). Copper piping to have ends cut square for socket brazing. Provide straight sections of factory insulated pipe 20-feet in length and having 6-inch of exposed pipe at each end for field joint fabrication. Field joining of piping to utilize approved methods of silver soldering or brazing with alloys melting at or above 1100 degrees F; tin-lead solder is not acceptable. 1. Fittings: ASME B16.22, wrought copper. 2. Joints: Solder, lead free, ASTM B 32, HB alloy (95-5 tin-antimony), or tin and silver. 3. Insulation: Polyurethane foam either spray applied or injected with one shot into the annular space between carrier pipe and jacket, and bonded to both. Provide insulation rigid, percent closed cell polyurethane with a 2.0 to 3.0 pounds per cubic foot density and coefficient of thermal conductivity (K-Factor) of 0.14 and conforming to ASTM C-591. Maximum operating temperature of urethane not-to-exceed 250 degrees F. 4. Jacketing Material: Provide either extruded white polyvinyl chloride, consisting of clean, 1, Grade 1 or high density polyethylene (HDPE). Provide PVC jacket with a wall thickness in mils equal to ten times the nominal jacket diameter and not less than 60 mils. HDPE to have a minimum wall thickness of 125 mils for jacket sizes equal to or less than 12-inch or 150 mils for jacket sizes greater than 12-inch to 24-inch and used for all jacketing larger than 16-inch. No FRP, HDUP or tape jacket allowed. a. Provide jacketing for fittings, valves, etc. of same material as for piping. 5. Expansion Loops and Ells: c. Provide expansion loops or expansion elbows prefabricated and shipped to the job site in as few pieces as possible (manufacturer's recommendations govern). d. Inner pipe loops and expansion bends cold sprung in the field as required. 6. Moisture Barrier End Seals: Factory applied, sealed to the jacket and carrier pipe. End E. Preinsulated Underground PEX Pipe 1. Factory preinsulated piping system, consisting of an inner media carrier pipe, insulation around the carrier pipe, and a water/vapor seal jacket over the insulation. Rated for minimum 180F heating water at 85 PSI. 2. Carrier Pipe Material: PEX piping. Combined supply and return. 3. Insulation: Rigid closed cell polyurethane. 4. Outer Casing: Flexible HPDE. 5. Each factory prefabricated section provides complete sealing of insulation at each end of conduit/casing. Provide permanent water and vapor seal. 6. Carry over outer casing and extend to carrier pipe or use prefabricated caps specifically designed for end seal of prefabricated insulation systems. Fabricate caps of the same material as the outer casing. 7. Manufacturers: Uponor Ecoflex or approved equivalent Page 3

4 2.2 HEATING WATER PIPING, ABOVE GROUND A. Steel Pipe: ASTM A53/A 53M, Schedule 40, black, Type E (electric resistance welded), Grade B. 1. Fittings: ASME B16.3, malleable iron or ASTM A 234/A 234M, wrought steel welding type. 2. Wrought Cast and Forged Steel Flanges and Flanged Fittings: ASME B16.5 including bolts, nuts, and gaskets of the following material group, end connections, and facings: a. Material Group: 1.1. b. End Connections: Butt welding. c. Facings: Raised face. 3. Joints: Threaded or AWS D1.1 welded. B. Copper Tube: ASTM B 88 (ASTM B 88M), Type L (B), drawn. 1. Fittings: ASME B16.18, cast brass, or ASME B16.22, solder wrought copper. 2. Joints: Solder, lead free ASTM B32, HB alloy (95-5 tin antimony), or tin and silver. 3. Joints: Brazed, AWS A5.8, Classification BAg-1 (silver). Pipes 2-1/2-inches or larger or piping routed over food preparation centers, food serving facilities, food storage areas, computer rooms, telecommunications rooms, and electrical rooms. 2.3 CHILLED WATER PIPING, BURIED A. Underground Chilled Water Piping Systems: 1. Ricwil 2. Thermacor 3. Rovanco. 4. Perma-Pipe 5. Or approved equivalent. B. Steel Pipe: ASTM A 53/A 53M, Schedule 40, black, Grade B, ERW (Type E) or seamless (Type S). 1. Fittings: ASTM A 234/A 234M, wrought steel welding type with double layer, half-lapped polyethylene tape. 2. Weld Fittings: a. Changes in direction made with weld fittings. b. Where tee branches are smaller than the mains they join, weld-o-lets may be used. c. Provide weld fittings long radius and the same wall thickness as adjacent piping. 3. Joints: Welded in accordance with AWS D Insulation: Polyurethane foam either spray applied or high pressure injected with one shot into the annular space between carrier pipe and jacket. Insulation rigid, percent closed cell polyurethane with a 2.0 to 3.0 pounds per cubic foot density and coefficient of thermal conductivity (K-Factor) of 0.14 and conforming to ASTM C-591. Maximum operating temperature not-to-exceed 250 degrees F. 5. Jacketing Material: Provide either extruded white polyvinyl chloride, consisting of clean, 1, Grade 1 or high density polyethylene (HDPE). Provide PVC jacket with a wall thickness in mils equal to ten times the nominal jacket diameter and not less than 60 mils. HDPE to have a minimum wall thickness of 125 mils for jacket sizes equal to or less than 12-inch or 150 mils for jacket sizes greater than 12-inch to 24-inch and used for all jacketing larger than 16-inch. No FRP, HDUP, or tape jacket allowed. 6. Provide jacketing for fittings, valves, etc. of the same material as for piping. 7. Expansion Loop and Ells: Page 4

5 c. Expansion loops or expansion elbows prefabricated and shipped to the job site in as few pieces as possible (manufacturer's recommendations to govern). d. Inner pipe loops and expansion bends cold sprung in the field as required. e. Provide calculations as part of submittals. 8. Moisture Barrier End Seals: Factory applied, sealed to the jacket and carrier pipe. End C. Steel Pipe Sizes 12-inch and Over: ASTM A 53/A 53M, inch wall, black, Grade B, ERW (Type E) or seamless (Type S). 1. Fittings: ASTM A 234/A 234M, wrought steel welding type with double layer, half-lapped polyethylene tape. 2. Weld Fittings: a. Changes in direction made with weld fittings. b. Where tee branches are smaller than the mains they join, weld-o-lets may be used. c. Provide weld fittings long radius and the same wall thickness as adjacent piping. 3. Joints: Welded in accordance with AWS D Insulation: Polyurethane foam either spray applied or high pressure injected with one shot into the annular space between carrier pipe and jacket. Insulation rigid, percent closed cell polyurethane with a 2.0 to 3.0 pounds per cubic foot density and coefficient of thermal conductivity (K-Factor) of 0.14 and conforming to ASTM C-591. Maximum operating temperature not-to-exceed 250 Degrees F. 5. Jacketing Material: Provide either extruded white polyvinyl chloride, consisting of clean, 1, Grade 1 or high density polyethylene (HDPE). Provide PVC jacket with a wall thickness in mils equal to ten times the nominal jacket diameter and not less than 60 mils. HDPE to have a minimum wall thickness of 125 mils for jacket sizes equal to or less than 12-inch or 150 mils for jacket sizes greater than 12-inch to 24-inch and used for all jacketing larger than 16-inch. No FRP, HDUP, or tape jacket allowed. 6. Provide jacketing for fittings, valves, etc. of same material as for piping. 7. Expansion Loop and Ells: c. All expansion loops or expansion elbows prefabricated and shipped to the job site in as few pieces as possible (manufacturer's recommendations to govern). d. All inner pipe loops and expansion bends cold sprung in the field as required. e. Provide calculations as part of submittals. 8. Moisture Barrier End Seals: Factory applied, sealed to the jacket and carrier pipe. End D. Copper Tube: ASTM B 88 (ASTM B 88M), Type K (A) annealed. Copper piping to have ends cut square for socket brazing. Provide straight sections of factory insulated pipe of 20-feet in length and having 6-inches of exposed pipe at each end for field joint fabrication. Field joining of piping to utilize approved methods of silver soldering or brazing with alloys melting at or above 1100 degrees F; tin-lead solder is not acceptable Page 5

6 1. Fittings: ASME B16.22, wrought copper. 2. Joints: Solder, lead free, ASTM B32, HB alloy (95-5 tin-antimony), or tin and silver. 3. Insulation: Polyurethane foam either spray applied or injected with one shot into the annular space between carrier pipe and jacket, and bonded to both. Insulation rigid, percent closed cell polyurethane with a 2.0 to 3.0 pounds per cubic foot density and coefficient of thermal conductivity (K-factor) of 0.14 and conforming to ASTM C-591. Maximum operating temperature of urethane not-to-exceed 250 degrees F. 4. Jacketing Material: Provide either extruded white polyvinyl chloride, consisting of clean, 1, Grade 1 or high density polyethylene (HDPE). Provide PVC jacket with a wall thickness in mils equal to ten times the nominal jacket diameter and not less than 60 mils. HDPE to have a minimum wall thickness of 125 mils for jacket sizes equal to or less than 12-inch or 150 mils for jacket sizes greater than 12-inch to 24-inch and used for all jacketing larger than 16-inch. No FRP, HDUP or tape jacket allowed. a. Provide jacketing for fittings, valves, etc. of same material as for piping. 5. Expansion Loops and Ells: c. All expansion loops or expansion elbows prefabricated and shipped to the job site in as few pieces as possible (manufacturer's recommendations govern). 6. Provide inner pipe loops and expansion bends cold sprung in the field as required. 7. Moisture Barrier End Seals: Factory applied, sealed to the jacket and carrier pipe. End E. PVC Pipe Sizes 6-inch and Smaller: ASTM D1784, ASTM D 1785, Schedule 40, or ASTM D 2241, SDR 21 or Fittings: ASTM D 2466, or ASTM D 2467, PVC. 2. Joints: Solvent welded. 3. Insulation: Polyurethane foam either spray applied or injected with one shot into the annular space between carrier pipe and jacket, and bonded to both. Insulation rigid, percent closed cell polyurethane with a 2.0 to 3.0 pounds per cubic foot density and coefficient of thermal conductivity (K-Factor) of 0.14 and conform to ASTM C-591. Maximum operating temperature of urethane not-to-exceed 250 degrees F. 4. Jacketing Material: Provide either extruded white polyvinyl chloride, consisting of clean, 1, Grade 1 or high density polyethylene (HDPE). PVC jacket to have a wall thickness in mils equal to ten times the nominal jacket diameter and not less than 60 mils. HDPE to have a minimum wall thickness of 125 mils for jacket sizes equal to or less than 12-inch or 150 mils for jacket sizes greater than 12-inch to 24-inch and used for all jacketing larger than 16-inch. No FRP, HDUP, or tape jacket allowed. a. Jacketing for fittings, valves, etc. of same material as for piping. 5. Expansion Loops and Ells: c. Expansion loops or expansion elbows prefabricated and shipped to the job site in as few pieces as possible (manufacturer's recommendations to govern). d. All inner pipe loops and expansion bends cold sprung in the field as required Page 6

7 6. Moisture Barrier End Seals: Factory applied, sealed to the jacket and carrier pipe. End F. PVC Pipe Sizes 8-inch and Larger: ASTM 1784, ASTM D 1785, Schedule 80, or ASTM D 2241, SDR 21 or Fittings: ASTM D 2466, or ASTM D 2467, PVC. 2. Joints: Solvent welded. 3. Insulation: Polyurethane foam either spray applied or injected with one shot into the annular space between carrier pipe and jacket, and bonded to both. Insulation rigid, percent closed cell polyurethane with a 2.0 to 3.0 pounds per cubic foot density and coefficient of thermal conductivity (K-Factor) of 0.14 and conform to ASTM C-591. Maximum operating temperature of urethane not-to-exceed 250 degrees F. 4. Jacketing Material: Provide either extruded white polyvinyl chloride, consisting of clean, 1, Grade 1 or high density polyethylene (HDPE). PVC jacket to have a wall thickness in mils equal to ten times the nominal jacket diameter and not less than 60 mils. HDPE to have a minimum wall thickness of 125 mils for jacket sizes equal to or less than 12-inch or 150 mils for jacket sizes greater than 12-inch to 24-inch and used for all jacketing larger than 16-inch. No FRP, HDUP, or tape jacket allowed. a. Jacketing for fittings, valves, etc. of same material as for piping. 5. Expansion Loops and Ells: c. All expansion loops or expansion elbows prefabricated and shipped to the job site in as few pieces as possible (manufacturer's recommendations to govern). d. All inner pipe loops and expansion bends cold sprung in the field as required. 6. Moisture Barrier End Seals: Factory applied, sealed to the jacket and carrier pipe. End G. Preinsulated Underground PEX Pipe 1. Factory preinsulated piping system, consisting of an inner media carrier pipe, insulation around the carrier pipe, and a water/vapor seal jacket over the insulation. Rated for minimum 180F heating water at 85 PSI. 2. Carrier Pipe Material: PEX piping. NSF, Combined supply and return. 3. Insulation: Rigid closed cell polyurethane. 4. Outer Casing: Flexible HPDE 5. Each factory prefabricated section provides complete sealing of insulation at each end of conduit/casing. Provide permanent water and vapor seal. 6. Carry over outer casing and extend to carrier pipe or use prefabricated caps specifically designed for end seal of prefabricated insulation systems. Fabricate caps of the same material as the outer casing. 7. Manufacturers: Uponor or Rovanco Twinflex for combined supply/return. 2.4 CHILLED WATER PIPING, ABOVE GRADE A. Manufacturers - Grooved Mechanical Joint Fittings and Couplings: 1. Central Sprinkler Company; Central Grooved Piping Products Page 7

8 2. Anvil International 3. Shurjoint Piping Products 4. Or approved equivalent. B. Steel Pipe: ASTM A 53/A 53M, Schedule 40, black, Type E (electric resistance welded), Grade B. 1. Fittings: ASME B16.3, malleable iron or ASTM A 234/A 234M, wrought steel welding type. 2. Wrought Cast and Forged Steel Flanges and Flanged Fittings: ASME B16.5 including bolts, nuts, and gaskets of the following material group, end connections, and facings: a. Material Group: 1.1. b. End Connections: Butt welding. c. Facings: Raised face. 3. Joints: Threaded or AWS D1.1 welded. C. Grooved Mechanical Joint Fittings: ASTM A536, Grade ductile iron; ASTM A47 (ASTM A47M), Grade malleable iron; ASTM A53, Type F, E, or S, Grade B fabricated steel; or ASTM A 106, Grade B steel fittings with grooves or shoulders designed to accept grooved end couplings. 1. Grooved Mechanical-Joint Couplings: Ductile or malleable iron housing and synthetic rubber gasket of central cavity pressure-responsive design for operating temperature range from -30 degrees F to 230 degrees F. Gasket material as recommended by manufacturer for design conditions. D. Steel Pipe Sizes 12-inch and Over: ASTM A 53/A 53M, inch wall, black. 1. Fittings: ASTM A 234/A 234M, wrought steel welding type. 2. Wrought Cast and Forged Steel Flanges and Flanged Fittings: ASME B16.5 including bolts, nuts, and gaskets of the following material group, end connections, and facings: a. Material Group: 1.1. b. End Connections: Butt welding. c. Facings: Raised face. 3. Joints: Welded in accordance with AWS D Grooved Mechanical Joint Fittings: ASTM A536, Grade ductile iron; ASTM A47 (ASTM A47M), Grade malleable iron; ASTM A53, Type F, E, or S, Grade B fabricated steel; or ASTM A 106, Grade B steel fittings with grooves or shoulders designed to accept grooved end couplings. 5. Grooved Mechanical-Joint Couplings: Ductile or malleable iron housing and synthetic rubber gasket of central cavity pressure-responsive design for operating temperature range from -30 degrees F to 230 degrees F. E. Copper Tube: ASTM B 88 (ASTM B 88M), Type K (A), hard drawn. 1. Fittings: ASME B16.18, cast brass, or ASME B16.22, solder wrought copper. 2. Joints: Solder, lead free ASTM B32, HB alloy (95-5 tin antimony), or tin and silver. 3. Joints: Brazed, AWS A5.8, Classification BAg-1 (silver). Pipes 2-1/2-inches or larger or piping routed over food preparation centers, food serving facilities, food storage areas, computer rooms, telecommunications rooms, or electrical rooms. 2.5 CONDENSER WATER PIPING, BURIED A. Steel Pipe Smaller Than 12-inches: ASTM A 53/A 53M, Schedule 40, black with AWWA C105/A21.5 polyethylene jacket, or double layer, half-lapped polyethylene tape. 1. Fittings: ASTM A 234/A 234M, wrought steel welding type with double layer, half-lapped polyethylene tape. 2. Joints: Threaded for pipe 2-inch and under; AWS D1.1, welded for pipe over 2-inch Page 8

9 B. Steel Pipe Sizes 12-inch and Over: ASTM A 53/A 53M, inch wall, black with AWWA C105/A21.5 polyethylene jacket, or double layer, half-lapped polyethylene tape. 1. Fittings: ASTM A 234/A 234M, wrought steel welding type with double layer, half-lapped polyethylene tape. 2. Joints: Welded in accordance with AWS D1.1. C. Copper Tube: ASTM B 88 (ASTM B 88M), Type K (A) annealed. 1. Fittings: ASME B16.22, wrought copper. 2. Joints: Solder, lead free, 95-5 tin-antimony, or tin and silver. D. PVC Pipe Smaller than 8-inches: ASTM D 1785, Schedule 40, or ASTM D 2241, SDR 21 or Fittings: ASTM D 2466 or ASTM D 2467, PVC. 2. Joints: Solvent welded. E. PVC Pipe sizes 8-inch and larger: ASTM D 1785, Schedule 80, or ASTM D 2241, SDR 21 or Fittings: ASTM D 2466 or ASTM D 2467, PVC. 2. Joints: Solvent welded. F. HDPE Pipe Size 2-inch to 12-inch: 1. Carrier Pipe: HDPE, ASTM-3350, SDR Insulation: Closed cell polyurethane, thermal conductivity 0.16, ASTM C Jacketing: HDPE, minimum wall thickness of 100 mils. 4. Joints: Butt fusion welded. 2.6 CONDENSER WATER PIPING, ABOVE GROUND A. Grooved Mechanical Joint Fittings and Couplings - Approved Manufacturers: 1. Tyco Grooved Piping Products 2. Grinnell Corporation 3. Shurjoint Piping Products 4. Or approved equivalent. B. Steel Pipe: ASTM A53/A 53M, Schedule 40, black, Type E (electric resistance welded), Grade B. 1. Fittings: ASME B16.3, malleable iron or ASTM A 234/A 234M, wrought steel welding type. 2. Wrought Cast and Forged Steel Flanges and Flanged Fittings: ASME B16.5 including bolts, nuts, and gaskets of the following material group, end connections, and facings: a. Material Group: 1.1. b. End Connections: Butt welding. c. Facings: Raised face. 3. Joints: Threaded or AWS D1.1 welded. C. Grooved Mechanical Joint Fittings: ASTM A536, Grade ductile iron; ASTM A47 (ASTM A47M), Grade malleable iron; ASTM A53, Type F, E, or S, Grade B fabricated steel; or ASTM A 106, Grade B steel fittings with grooves or shoulders designed to accept grooved end couplings. 1. Grooved Mechanical-Joint Couplings: Ductile or malleable iron housing and synthetic rubber gasket of central cavity pressure-responsive design for operating temperature range from -30 degrees F to 230 degrees F. Gasket material as recommended by manufacturer for design conditions. D. Copper Tube: ASTM B 88 (ASTM B 88M), Type L (B), drawn. 1. Fittings: ASME B16.18, cast brass, or ASME B16.22, solder wrought copper Page 9

10 2. Joints: Solder, lead free, ASTM B32, HB alloy (95-5 tin-antimony), or tin and silver. 3. Joints: Brazed, AWS A5.8, Classification BAg-1 (silver). Pipes 2-1/2-inch or larger or piping routed over food preparation centers, food serving facilities, food storage areas, computer rooms, telecommunications rooms, and electrical rooms. 2.7 THRUST BLOCKING FOR UNDERGROUND PREINSULATED CHILLED WATER PIPING A. Thrust Blocking: Provide in systems in conformance with buried piping manufacturer's installation requirements. 1. Install thrust blocks at the locations shown on the drawings and locations recommended by the pipe system manufacturer. Thrust blocks may not be required on all systems. The need for thrust blocks is as recommended by the system manufacturer. Install thrust blocks at changes in direction, changes in size, valves and terminal ends, such as plugs, caps and tees. Provide concrete thrust blocks having a compressive strength of not less than 13,780 kpa (2000 PSI) after 28 days and in accordance with Section , Cast-in-Place Concrete. Place thrust blocks between solid ground and the fittings to be anchored. Unless otherwise indicated or directed, pour the base and the thrust bearing sides of the thrust blocks directly against undisturbed earth. Pour the sides of the thrust blocks not subject to thrust against forms. Place thrust blocks so that the joints for all fittings will be accessible for repair wherever possible. Do not embed pipe joints in concrete. Thrust blocks to provide for transfer of thrusts and reactions without exceeding the allowable stress of the concrete and installed in accordance with pipe manufacturer's instructions. In muck or peat, thrusts to be resisted by piles or tie rods to solid foundations or by removal of peat or muck which will be replaced with ballast of sufficient stability to resist thrusts. 2. Calculate the area of backing required for reaction backing of both supply and return piping in accordance with the Table(s) below. Determine the safe soil bearing load for the site. Submit calculations covering these determinations to the Architect for approval prior to placing any reaction backing on the job. B. Table 1: Thrust (two pipes), 1,550 kpa (225 PSIG), and Class 1033 kpa (150 PSIG): Pipe Size Tees 90 Degree Bends 45 Degree Bends 22-1/2 Degree Bends 3-inch 5,670 8,050 4,360 2,180 4-inch 6,820 11,750 6,390 3,240 6-inch 7,050 24,200 13,200 6,620 8-inch 29,500 41,800 22,600 11, inch 48,250 68,500 37,000 18, inch 68,750 97,500 52,750 26, inch 93, ,000 71,700 36, inch 115, ,000 92,600 46, inch 153, , ,000 60, inch 192, , ,500 74,200 C. Table 2: Safe Soil Bearing Loads: Soil kpa (psf) Muck/Peat (see Note below) 0 0 Soft Clay ,000 Sand ,000 Sand and Gravel , Page 10

11 Sand and Gravel in Clay ,000 Matrix Hard Shale , Note: In muck or peat, thrusts to be resisted by piles or tie rods to solid foundations or by removal of peat or muck which will be replaced with ballast of sufficient stability to resist thrusts. 2.8 ANCHORS FOR UNDERGROUND PREINSULATED HEATING HOT WATER PIPING A. Prefabricated plate anchors, with watershed rings welded to plate anchor, where required by buried piping manufacturer's installation requirements, consisting of a steel plate welded to pipe. The steel plate to be sized as recommended by the manufacturer, suitable for anchoring in a poured concrete. 2.9 RADIANT HEATING PIPING A. Polyethylene Pipe: ASTM F 876 or ASTM F 877, cross-linked polyethylene, 100 PSIG operating pressure at 180 degrees F. Barrier type. 1. Fittings: Brass and copper, ASTM F Joints: Expansion-type equal to ProPEX EQUIPMENT DRAINS AND OVERFLOWS A. Copper Tube: ASTM B 88 (ASTM B 88M), Type L (B), drawn. 1. Fittings: ASME B16.18, cast brass, or ASME B16.22 solder wrought copper. 2. Joints: Solder, lead free, ASTM B 32, HB alloy (95-5 tin-antimony), or tin and silver. 3. Joints: Brazed, AWS A5.8, Classification BAg-1 (silver). Pipes 2-1/2-inch or larger or piping routed over food preparation centers, food serving facilities, food storage areas, computer rooms, telecommunications rooms, and electrical rooms UNIONS A. Unions for Pipe 2-inches and Under: 1. Ferrous Piping: 150, 250, and 300 PSIG malleable iron, threaded, ASME B Copper Pipe: Bronze, soldered joints, ASME B B. Dielectric Connections: Provide dielectric waterway or brass nipple fitting with threaded ends. Dielectric unions are not allowed REFRIGERANT PIPING A. Piping: 1. Copper Tube: ASTM B 280, Type ACR, drawn-temper tube, clean, dry and capped. a. Fittings: ASME B16.22 wrought copper. b. Joints: Braze, AWS A5.8 BCuP silver/phosphorus/copper alloy (15 percent Silver). 2. Copper Tube to 5/8-inch OD: ASTM B280. Tube ACR, annealed-temper copper tube, clean, dry and capped. a. Fittings: ASME B16.26 cast copper. b. Joints: Flared. B. Moisture and Liquid Indicators: 1. Manufacturers: a. Henry Technologies. b. Parker Hannifin/Refrigeration and Air Conditioning Page 11

12 c. Sporlan Valve Company. d. Substitutions: See Section , HVAC Basic Requirements, Division 00, Procurement and Contracting Requirements and Division 01, General Requirements requirements. 2. Indicators: Single port type, UL listed, with copper or brass body, flared or solder ends, sight glass, color coded paper moisture indicator and plastic cap; for maximum temperature of 200 degrees F and maximum working pressure of 300 PSI. C. Valves: 1. Manufacturers: a. Hansen Technologies Corporation. b. Henry Technologies. c. Danfoss Flomatic. d. Substitutions: See Section , HVAC Basic Requirements, Division 00, Procurement and Contracting Requirements and Division 01, General Requirements. 2. Packaged Ball Valves: a. Two piece bolted forged brass body with Teflon ball seals and copper tube extensions, brass seal cap, chrome plated ball, stem with neoprene ring stem seals; for maximum working pressure of and maximum temperature of 300 degrees F. D. Filter-Driers: 1. Manufacturers: a. Flow Controls Division of Emerson Electric. b. Parker Hannifin/Refrigeration and Air Conditioning. c. Sporlan Valve Company. d. Substitutions: See Section , HVAC Basic Requirements, Division 00, Procurement and Contracting Requirements and Division 01, General Requirements. 2. Performance: a. Flow Capacity - Liquid Line: As required by equipment manufacturer, rated in accordance with ARI 710. b. Flow Capacity - Suction Line: As required by equipment manufacturer, rated in accordance with ARI 730. c. Water Capacity: As recommended by equipment manufacturer, rated in accordance with ARI 710. d. Pressure Drop: No greater than maximum recommended by equipment manufacturer, when operating at full connected evaporator capacity. e. Design Working Pressure: 350 PSI, maximum. 3. Cores: Molded or loose-fill molecular sieve desiccant compatible with refrigerant, activated alumina, and filtration to 40 microns; of construction that will not pass into refrigerant lines. 4. Construction: UL listed. a. Replaceable Core Type: Steel shell with removable cap. b. Sealed Type: Copper shell. c. Connections: As specified for applicable pipe type Page 12

13 E. Piping Riser Diagram: END OF SECTION Page 13