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Plumbing training

Water Supply & Drainage - Pipe Size, Pumps Calculation- Flow and Head

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Plumbing training

  1. 1. Plumbing System Water Supply and drainage Systems – Plumbing System, Water Supply, Drainage: Standards, Codes, Calculation. Prepared By: Monzer Salahdine
  2. 2. Introduction Plumbing System: A. Water Supply System(cold, hot & gray water). B. Drainage(soil, waste, vent & storm drain). C. Medical Gas System. D. LPG system.
  3. 3. Codes & Standards Codes, Standards & Authorities:  IPC (International Plumbing Code).  UPC (Uniform Plumbing Code).  ASPE (American Society Of Plumbing Engineers).  NPC (National Plumbing Code).  IBC (International Building Code).  HTM 02-01(Health Technical Memorandum – Medical Gas pipeline Systems – UK).  NHS (National Health Service – UK).  NFPA99 (Health Care Facilities Code).  SBC (Saudi building code - 501_Mechanical).  NWC ( National Water Company – Saudi Arabia).  DEWA, ADWEA (Dubai & Abu Dhabi Electricity & water Authorities).
  4. 4. Water Sources Main Water Sources:  Rain ( Evaporation & condensation).  Surface Source (Lakes, Rivers..).  Ground Source (Springs, Well, Infiltration Wells).
  5. 5. A- Water Supply System Water Supply System:  Cold Water.  Hot Water, hot water Return, Tempered Water.  Gray Water.  Irrigation Water.  Treated Water(Softener , RODI Machines).
  6. 6. A- Water Supply System Water Distribution: A. External water Distribution ( infra – structure) from storage Reservoirs, dams, wells, treatment water from rivers & sea. B. Internal water distribution inside the buildings, villas…
  7. 7. A- Water Supply System Pumps Pumps can be classified further As ( Centrifugal, Axial, Self Priming)  end suction pumps  in-line pumps  double suction pumps  vertical multistage pumps  horizontal multistage pumps  submersible pumps  self-priming pumps  axial-flow pumps AFP.  regenerative pumps  Booster Pumps.  Lifting Pumps.  Transfer Pumps.  Circulation Pumps.
  8. 8. A- Water Supply System Pumps
  9. 9. A- Water Supply System Pipes  UPVC Pipes – cold water ( Sch 40 , Sch 80, Class E, Class 5).  CPVC Pipes – hot water ( Sch 40 , Sch 80, Class E, Class 5).  HDPE Pipes – cold water.  PPR Pipes – cold & hot water. (PN10, PN16).  Copper Pipes – cold & hot water ( type K, L & M).  PEX Pipes – cold & hot water. (Size 16 & 22 mm, PN16).  Stainless steel & GI pipes – Cold & hot water.
  10. 10. A- Water Supply System Pipes  UPVC Pipes – cold water ( Sch 40 , Sch 80, Class E, Class 5).  CPVC Pipes – hot water ( Sch 40 , Sch 80, Class E, Class 5).  HDPE Pipes – cold water.  PPR Pipes – cold & hot water. (PN10, PN16, PN25, PN40).  Copper Pipes – cold & hot water ( type K, L & M).  PEX Pipes – cold & hot water. (Size 16 & 22 mm, PN16 & PN25).  Stainless steel & GI pipes – Cold & hot water.
  11. 11. A- Water Supply System Water Supply Pipes – Application & Jointing: Materials Application Jointing Remarks UPVC Pipe – CLASS 5 Cold Water Lines Solvent Cement CPVC Pipe – CLASS 5 Cold & Hot Water Lines Solvent Cement HDPE Pipe Cold Water – Irrigation & VRD Pipes Welded PPR Pipe – PN16-25 -40 Cold & Hot Water Lines Welded Copper Pipe – Type L, K & M. Cold & Hot Water Lines Brazing PEX Pipe – PN16 - 25 Cold & Hot Water Line Up to 22 mm Push-fit ring seal and compression fittings Stainless Steel Pipe SCH 40-80 Cold & Hot Water Lines Treading and Welding - MIG GI Pipe – SCH 40 -80 Cold & Hot Water Lines Treading and Welding - MIG
  12. 12. A- Water Supply System Valves & Accessories:  Gate Valve.  Ball Valve.  Angle Valve.  Butterfly Valve.  Globe Valve.  DRV( Double Regulating Valve).
  13. 13. A- Water Supply System Valves & Accessories:  Check Valve & Strainers.  Double check backflow preventer.  PRV ( Pressure Regulating Valve).  Flow Meter.  Water Hummer arrestor.  Mixing Valve
  14. 14. A- Water Supply System Sanitary Fixtures & Equipment:  WC ( Water Closet).  Bidet.  Urinal.  Hand Spray.  Wash basin.  Bathtub.  Jacuzzi Bathtub.  Shower.  Sink.  Janitor Sink.  Dish washer.  Wash machine.  Kitchen equipment, Fridge – Freezer – Ice Maker.  Steam Machine, Swimming Pool.
  15. 15. A- Water Supply System Sanitary Fixtures & Equipment:
  16. 16. A- Water Supply System Water Tanks:  GRP tank (Glass fiber reinforced plastics).  PE tank( Polyethylene).  Concrete Tank.  Black Steel Tank.  Stainless Steel Tank.
  17. 17. A- Water Supply System Elevated Water Tanks:  Concrete water tank, elevated to create pressure for distribution without using booster pumps.
  18. 18. A- Water Supply System Elevated Water Tanks:
  19. 19. A- Water Supply System Elevated Water Tanks:
  20. 20. A- Water Supply System Schematic:
  21. 21. A- Water Supply System Calculation - Introduction  Steps of calculation as below: 1. Water supply fixture unit (WSFU). 2. Water flow – water demand. 3. Pipes Size. 4. Pressure calculation - Pressure Demand, pressure drop. 5. Water consumption. 6. Water tank capacity. 7. Transfer pump.  Taking in consideration the below: 1. Pressure demand in outlet: 1.4 bars to 1.8 bars ( Some special showers head required 2.4 bars!). 2. Velocity of water inside pipes: 5 ft/sec to 8 ft/sec ( risers up to 2.5 m/s).
  22. 22. A- Water Supply System  Steps of calculation as below: Sanitary Fixture Quantities and WSFU Water Flow Water Demand Pipes Sizing Pressure Drop Pressure Demand Pumps Selection
  23. 23. A- Water Supply System Calculation - Introduction  Water Supply Fixtures Unit( WSFU): Designate the Relative WEIGHT of different fixture units. The Water Supply Fixture Units - WFSU - are used to determine the water demand in water supply systems. One WFSU for a single unit corresponds to one GPM. 1 WSFU = 1 GPM This conversion can only be used for one or a few fixtures. When the total amount for many fixtures are added up, the number must be compensated due to the intermittent use of the fixtures. This is normal taken care of in the tables available for sizing supply pipe lines. NOTE: In case there is flush valve: separate line must be considered and table of demand have a deferent values.  Refer to International Plumbing Code(IPC) APPENDEX E ( Sizing Of Water Piping System):
  24. 24. A- Water Supply System Calculation – WSFU:
  25. 25. A- Water Supply System Calculation – WATER DEMAND:
  26. 26. A- Water Supply System Calculation – WATER DEMAND:
  27. 27. A- Water Supply System Calculation – WATER DEMAND – intermediate value: Calculation – WATER DEMAND – intermediate value: F( c ) = [[F( b ) – F( a )] * (c-a)] / ( b – a) + F ( a ). Example – WATER DEMAND – intermediate value: SWFU = 4281 Water Demand = [[593 -525] * (4281 -4000)] / ( 5000 -4000) + 525 = 544 GPM
  28. 28. A- Water Supply System Calculation – Minimum sizes of fixture Water supply pipes:
  29. 29. A- Water Supply System Calculation – WATER DEMAND – table - Example: FIXTURES (POTABLE) FIXTURES NO WSFU TOTAL EWC-1 0 2.5 0 EWC-2 22 5 110 EWC-3 0 2.5 0 WC-1 0 2.5 0 WC-2 4 5 20 WC-3 2 2.5 5 SHO-1 0 2 0 SHO-2 7 2 14 LAV-1 8 1 8 LAV-2 26 1 26 WM 3 4 12 PS 20 1 20 AF 2 3 6 SF 8 2 16 KS-1 1 1.5 1.5 KS-2 6 1.5 9 JS-1 0 1.5 0 JS-2 2 3 6 DWF 8 1 8 HB 2 1 2 T O T A L 263.5 FLOOR/BLDG F I X T U R E S POTABLE EWC-1 EWC-2 EWC-3 WC-1 WC-2 WC-3 SHO-1 SHO-2 LAV-1 LAV-2 WM/DW PS AF SF KS-1 KS-2 JS-1 JS-2 DWF HB FD SUB-TOTAL GROUND 0 12 0 0 1 0 0 5 5 10 1 5 0 8 0 3 0 0 8 0 6 64 FIRST 0 4 0 0 3 2 0 0 2 8 0 9 0 0 0 2 0 0 0 0 8 38 ROOF 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 2 SECOND 0 2 0 0 0 0 0 0 0 4 1 2 2 0 0 1 0 1 0 0 3 16 THIRD 0 3 0 0 0 0 0 2 0 4 1 3 0 0 0 0 0 1 0 0 2 16 FOURTH 0 1 0 0 0 0 0 0 1 0 0 1 0 0 1 0 0 0 0 0 1 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 T O T A L 0 22 0 0 4 2 0 7 8 26 3 20 2 8 1 6 0 2 8 2 20 141
  30. 30. A- Water Supply System Calculation – WATER DEMAND – table - Example: POTABLE BIB TAB W.C HAND SP BIDET laundry WB SINK BT SH STEAM M FU/ FLOOR BAS 3 8 0 0 0 0 0 0 0 0 0 12 BAS 2 8 0 0 0 0 0 0 0 0 0 12 BAS1 3 8 8 0 0 10 6 0 0 0 78.5 G.F 0 0 0 0 0 0 0 0 0 0 0 F.F 0 22 22 0 22 22 22 0 22 0 297 2nd 1 10 10 3 3 10 3 3 4 0 101.5 3rd 1 10 10 3 3 10 3 3 4 0 101.5 4th typ 1 13 13 4 4 13 4 4 5 0 132 31 floor 0 4 4 0 2 4 2 0 2 0 40 mech floor 6 0 0 0 0 0 0 0 0 0 9 roof floor 2 0 0 0 0 0 0 0 0 0 3 ATP 2A 0 3 3 1 1 3 1 1 1 0 30.5 APT 3A 0 4 4 1 1 4 1 1 2 0 39 APT 2B 0 3 3 1 1 3 1 1 1 0 30.5 APT 2C 0 3 3 1 1 3 1 1 1 0 30.5 POOL SERVICE 2 0 0 0 0 0 0 0 0 1 18 HEALTH CLUB 0 4 4 0 0 4 0 0 2 1 45 T / FIXTURE 58 409 409 114 138 411 144 114 169 2 4281.5 UFU/ FIXTURE 1.5 3 1.5 2 2 2 3 2 2 15 TFU / FIXTURE 87 1227 613.5 228 276 822 432 228 338 30
  31. 31. A- Water Supply System 
  32. 32. A- Water Supply System Calculation – Friction Loss, Pressure Drop, Pressure Demand, Static Head:  Pressure Demand: Pressure Required in the sanitary fixture- outlet(between 1.4 bars to 1.85 bars).  Pressure Drop: the difference in pressure between Two points in the system, caused by resistance in flow, Pressure loss across valves, fittings , special sanitary outlets( temperature control shower, flush meter tank Water closet- 8 psi).  Static Head: the pressure from static head is the force exerted in all directions onto its container from the weight of the water above. Knowing the required static head is useful when selecting pumps to lift water to specific heights..
  33. 33. A- Water Supply System Pressure Demand per fixture unit:
  34. 34. A- Water Supply System Calculation – Pressure Drop – valves & Fittings:
  35. 35. A- Water Supply System Calculation – Pressure Drop – Valves & Fittings:
  36. 36. A- Water Supply System Calculation – Pressure Drop - Pipes – total equivalent length:
  37. 37. A- Water Supply System Calculation – Pressure Drop - Pipes – total equivalent length:  HAZEN – WILLIAMS Chart- following their equation:  Different charts available – depend on roughness of pipes (copper – smooth) (PVC – Fairy smooth) (Steel - rough and fairy rough)  Velocity between 5 to 8 ft/sec.
  38. 38. A- Water Supply System Pressure calculation - Example. TECHNICAL CALCULATION SHEET Project: EXAMPLE Dwg. #: SUBJECT PLUMBING (Booster PUMPS) Page-1 Rev.: 0 Title: Hydraulic Calculations Date: 23 Nov 2015 Item Section Particular Equivalent Length Of Pipe, Fittings & Valves Head Loss (Mtr) (See Note Below)Pipe Flow Velocity (M/s) Pipe and Fittings = (A) Total Valves = (B) Total Remarks Type ND (mm) ID (mm) M³/hr L/s Item Pipe 90°El 45°El Thru T Br.T Red. Other s Gate Glob e B/fly Ball Chk. (A)+ (B) Other s Total Process Pump - Supply Water From Irrigation Tank TO Process Buildings In STP 1.1 A-B UPVC 40 41.7 5.0 1.39 1.1 Qty. 1.0 4.0 2.0 1.0 1.0 1.0 1.0 3.38 3.38 Each (mtr) 76.0 0.8 2 0.5 0.8 0.8 0.2 0.2 Total - mtr. 76.0 3.3 1.0 0.8 0.8 85.4 0.3 0.2 0.5 1.2 B-C UPVC 32 36 4.0 1.11 1.1 Qty. 1.0 2 1.0 1.0 1.0 0.82 0.82 Each (mtr) 10.0 1.1 1.6 2.4 2.4 Total - mtr. 10.0 2.1 1.6 2.4 2.4 15 1.3 Static Head Required Pumps to Highest point UPVC Qty. 10 10 Each (mtr) Total - mtr. 1.4 Residual Pressure( Pressure Demand on Outlet). UPVC Qty. 14 14 Each (mtr) Total - mtr. 1.5 Allow 10% Safety Factor UPVC 10 0 105. 3 6.73 1.87 0.2 Qty. 1.0 1.0 1.0 1.0 3.66 3.66 Each (mtr) 30.0 2.1 3.4 3.4 Total - mtr. 30.0 2.1 3.4 3.4 38.9 Balanced Pressure Required ( M ) 41.26 Required Pressure ( Bar ) 4.126 Bar * Note: Head loss calculation on pipes and fittings are based on HAZEN – WILLIAMS equation as follows: H = head loss in pipe, M L = equivalent length, M H = 1108.23 x (Q^1.852 / C^1.852 x Di^4.8655) x 10^6 x L C = Pipe constant, 120 for steel, 150 for PVC Q = Flow in pipe, M³/hr Di = Inside diameter of pipe mm
  39. 39. A- Water Supply System Water Consumption per person per day : The table below gives a guide to average water use based on the number of occupants: Note: Usually we consider 250 liters / day / person for the private villa.
  40. 40. A- Water Supply System Water Tank Capacity – Water Consumption per person per day: The table below gives a guide to average water use based on the number of occupants accumulative:
  41. 41. A- Water Supply System Water Tank Capacity – Water Consumption per person per day: NWC – National Water Company.
  42. 42. A- Water Supply System Water Consumption per person per year per country : The table below gives a guide to average water in world per person per year:
  43. 43. A- Water Supply System Transfer Pumps – Lifting water from U/G water tank to roof water tank:
  44. 44. A- Water Supply System Water Tank Capacity - Storage: Water tank capacity related to water consumption / person: Example 1: Flat consist of 6 peoples. 6 peoples x 135 liter / day = 810 liters / day Storage of tank considered for 3 days: 3 days x 810 liters = 2430 liters storage Tank size can be : 2 m x 1.5 m x 1 m. Example 2: Private villa of 8 peoples. 8 peoples x 250 liter / day = 2000 liters / day Storage of tank considered for 3 days: 3 days x 2000 liters = 6000 liters storage Under ground water tank: 2 m x 1.5 x 1m ( 3000 Liters) Roof water tank : 2 m x 1.5 x 1m ( 3000 Liters) where transfer pumps lift the water from under ground water tank to roof water tank
  45. 45. A- Water Supply System Different examples of water tank:
  46. 46. A- Water Supply System Different examples of water tank:
  47. 47. A- Water Supply System Different examples of water tank - Tower:
  48. 48. A- Water Supply System Transfer Pumps – Lifting water from U/G water tank to roof water tank: Transfer pumps must lift the water from below to roof tank in 1 -2 hours timing; Q = V/T. Q: flow, m3/h. V: Volume, m3. T: TIME , Hour or Second. Example 1: Tank can be : 2 m x 1.5 m x 1 m ( 3000 Liters). Flow of transfer pump: Q = V/T = 3 / 1 = 3 m3/h. Where pressure related to static head and pressure drop ( pressure demand on tank 2 m).
  49. 49. A- Water Supply System Expansion tank of booster pumps: Taking in consideration the working pressure, flow, max pressure,,,,, PRESSURE TANK SIZE CALCULATION Date: 01 Oct. 2014 Rev. No: 00 Project: SANG STP NON-PROCESS Code: Building: 003 Lot: 410 1.0 PRESSURE TANKS: Unit Value 1.1 TREATED WATER BOOSTER PUMP: 1.1.1 Pressure calculation: Maximum pressure of pump (flow =0) A bars 4.16 Gravity pressure from the tank B bars 0.00 Total maximum pressure C = A +B bars 4.16 Stopping pressure D = C - 0.5 (0.4 T0 0.5) bars 3.66 Starting pressure E = D - 2.0 ( 1 to 2) bars 1.66 1.1.2 Pressure tank sizing data: Ave. flow of the pump: M³/hr 7.00 Ave. flow of the pump: L/min 116.67 Total average flow of the pump(+10%) 1 L/min 128.34 Starting (absolute) pressure of pump 2 = E + 1 bars 2.66 Stopping (absolute) pressure of pump 3 = D + 1 bars 4.66 Quantity of pump 4 ea 2.00 Authorized qty. of starts for each pump 5 ea 12.00 1.1.3 Calculation from data: Nominal pressure in tank 6 = 2 - 0.50 bars 2.16 Total authorized starts from pump 7 = 5 * 4 ea 24.00 Available water volume in tank 8 = 1 / 7 * 16.5 Liters 88.23 Absolute pressure difference 9 = 3 - 2 bars 2.00 1.1.4 Calculation Results: Total Vol. of Pressure tank required = 8 * 3 * 2 / 9 * 6 Liters 253.16 1.1.5 Adopted Capacity: Pressure tank capacity adopted Liters 300 Quantity of pressure tank selected ea 1 Capacity per pressure tank adopted ea 300
  50. 50. A- Water Supply System Hot Water Supply System:  Water heater. Horizontal and vertical type 50 l up to 200 l. AO Smith, Ariston, Saudi heater,,  Hot storage tank. Horizontal and vertical type 250 l up to 2500 l. Electrical & heat exchanger supplied hot water from Boilers, AO Smith, Cemline,  Circulation Pumps. To circulate hot water system in order to maintain and serve and instant hot water in the taps.  Mixing Valve. Manual and digital, Leonard, Armstrong, Carotek Note: Under this part we have the hot water, tempered water and return line in case there is circulation pump.
  51. 51. A- Water Supply System Hot Water Supply System:
  52. 52. A- Water Supply System Hot Water Supply System:
  53. 53. A- Water Supply System Hot Water Supply System:
  54. 54. A- Water Supply System Hot Water flow and water demand: Calculation of WSFU for hot water system same as cold water where after we can evaluate the GPM and pipe sizing. Calculation of capacity as below: 1.) DESIGN DATA: TYPE OF OCCUPANCY = DETENTION DEMAND FACTOR = 0.3 STORAGE FACTOR = 1.25 HEATING UP PERIOD, HR = 1 TEMPERATURE RISE,ºC (60ºC-16ºC) = 55 LOCATION = GROUND FLOOR (G56 ) 2.) CALCULATIONS:- FIXTURE SERVED NUMBER HOT WATER TOTAL HOT DEMAND (L/h) WATER REQUIRED LAV-1 4 7.6 30.4 LAV-2 6 15 90 SF 4 15 60 SHO 4 114 456 636.4 Hot water rating = 636.4 x 0.3 = 190.92 L/h Storage capacity = 190.92 x 1.25 = 238.65 L
  55. 55. A- Water Supply System Introduction to Pumps Selection: Definition of the following:  Electrical power.  Atmospheric Pressure.  Bernoulli Equation.  Vapor pressure.  NPSH.  Cavitation.  System curve.  Pump curve and selection.
  56. 56. A- Water Supply System Electrical Power Supply and equation with Head and Flow Of Pumps:
  57. 57. A- Water Supply System Electrical Power Supply and equation with Head and Flow Of Pumps: When Pressure and flow increase, Electrical Power will be increased.
  58. 58. A- Water Supply System Atmospheric Pressure:
  59. 59. A- Water Supply System Pressure, Velocity, Friction losses, Bernoulli equation:
  60. 60. A- Water Supply System Pressure, Velocity, Friction losses, Bernoulli equation:
  61. 61. A- Water Supply System Water – Liquid Vapor - : Increase temperature or reducing pressure to below the liquid vapor pressure limit will developed vapor instead of liquid water:
  62. 62. A- Water Supply System NPSH:
  63. 63. A- Water Supply System NPSH:
  64. 64. A- Water Supply System NPSHa ( available):
  65. 65. A- Water Supply System NPSHa ( available):
  66. 66. A- Water Supply System NPSHa ( available):
  67. 67. A- Water Supply System NPSHr ( Required): NPSHa > NPSHr ( no cavitation). NPSHa < = NPSHr ( cavitation Occur).
  68. 68. A- Water Supply System Example:
  69. 69. A- Water Supply System Water Vapor Pressure and max suction Head:
  70. 70. A- Water Supply System Cavitation Effect:
  71. 71. A- Water Supply System Effect Of cavitation On head pressure:
  72. 72. A- Water Supply System System Curve, Pump Curve, Selection:
  73. 73. A- Water Supply System System Curve, Pump Curve, Selection:
  74. 74. A- Water Supply System System Curve, Pump Curve, Selection:
  75. 75. B- Drainage System Drainage System consist of the following:  Soil Water  Waste Water.  Vent Pipe.  Storm Water.
  76. 76. B- Drainage System Drainage System:
  77. 77. B- Drainage System P – Trap, WC , Wash basin:
  78. 78. B- Drainage System P – Trap, bathtub , Shower, urinal:
  79. 79. B- Drainage System Floor drain, shower drain, clean out, Channel drain :
  80. 80. B- Drainage System Kitchen Drain, Stainless steel, Basket:
  81. 81. B- Drainage System Roof Drain, Roof Vent cover,
  82. 82. B- Drainage System Discharge line cover, wall Mounted, Downspout Nozzle:
  83. 83. B- Drainage System Pumps  Submersible pumps.  Transfer pumps(STP).  Centrifugal pumps.
  84. 84. B- Drainage System Pumps  Submersible pumps.
  85. 85. B- Drainage System Pumps  Submersible pumps.
  86. 86. B- Drainage System Pipes  UPVC Pipes – drainage of soil, waste, storm(Class 4), vent Pipes, and pressurized line of submersible pumps(Class 5).  Metal steel pipes MS, discharge line of submersible pumps ( sch40)  Copper Pipes – drainage of soil, waste( type DWV).  Cast Iron Pipes( Sch40) – soil, waste and kitchen pipes.  PPFR - drainage of lab where chemicals used( sch40).  GRP Pipes – sewer forced line, From lift station to Municipality line.  Stainless steel Pipes – Grease pipes and kitchen.
  87. 87. B- Drainage System Drainage Pipes – Application & Jointing: Materials Application Jointing Remarks UPVC Pipe – CLASS 4 & 5 Soil, waste storm Drainage pipes by Gravity, vent pipes – class 4 Force line – class 5 Push-fit ring with rubber & Solvent Cement MS Pipe – Sch40 & Sch 80 Cold Water – Irrigation & VRD Pipes Flanges, Threaded, Grooved Copper Pipe – Type DWV Waste line drainage ( wash basin, bathtub). Brazing Cast Iron Pipes Soil and waste pipes, Kitchen Pipes. Push-fit ring seal and compression fittings PPFR Pipes – sch 40 and shc80 LAB drainage – ACID application Welded, fusion. GRP Pipes – PN16, PN25 Drainage forced line Push-fit ring seal and resin welding, GRP flanges. Stainless steel Pipes, 316L– Sch40 Kitchen drain, grease drain. Treading and Welding - MIG
  88. 88. B- Drainage System Calculation - Introduction  Steps of calculation as below: 1. Drainage fixture unit (DFU). 2. Pipes Size. 3. Pressure calculation - Pressure Demand, pressure drop. 4. Pumps.
  89. 89. B- Drainage System Calculation - Introduction  Drainage Fixtures Unit( WSFU): Designate the Relative WEIGHT of different fixture units. The Drainage Fixture Units - DSU - are used to determine the PIPES SIZE in drainage systems. NOTE: In case there is flush valve: separate line must be considered and table of demand have a deferent values.  Refer to International Plumbing Code(IPC) APPENDEX E ( Sizing Of Water Piping System)
  90. 90. B- Drainage System Drainage Fixture Unit ( DFU):
  91. 91. B- Drainage System Drainage Fixture Unit ( DFU):
  92. 92. B- Drainage System Drainage Fixture Unit ( DFU):
  93. 93. B- Drainage System Pipe Size / Slope / DFU:
  94. 94. B- Drainage System Pipe Size / DFU - stacks:
  95. 95. B- Drainage System Vent Pipes:
  96. 96. B- Drainage System Vent Pipes:
  97. 97. B- Drainage System Sum pit vent pipe:
  98. 98. B- Drainage System Manning Formula – velocity and flow in Drainage Pipe:
  99. 99. B- Drainage System Manning Formula – velocity and flow in Drainage Pipe:
  100. 100. B- Drainage System Manning Formula – velocity and flow in Drainage Pipe:
  101. 101. B- Drainage System Manning Formula – velocity and flow in Drainage Pipe:
  102. 102. B- Drainage System Sanitary Clearance:
  103. 103. B- Drainage System Water Tank – Drain & Overflow :
  104. 104. B- Drainage System Water Tank – Drain & Overflow :
  105. 105. B- Drainage System Grease Interceptor:
  106. 106. B- Drainage System Grease Interceptor:
  107. 107. B- Drainage System Grease Interceptor:
  108. 108. B- Drainage System Grease Interceptor capacity and selection:
  109. 109. B- Drainage System Grease Interceptor capacity and selection:
  110. 110. B- Drainage System STORM Drain: Strom drain intensity in Riyadh( rainfall Rate) : 60 mm/ hour / 1 m2 ( 2.4 IN / hour) – Peak Below is the cumulative rainfall per month in Riyadh.
  111. 111. B- Drainage System STORM Drain: Strom drain intensity in Riyadh( rainfall Rate) : 60 mm/ hour / 1 m2 ( 2.4 IN / hour) – Peak Below is the cumulative rainfall per month in Riyadh.
  112. 112. End

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