3/18/2016. Operator Basics: Storage and Distribution. RCAC 2016 Online Training Series. Storage and Distribution Word Search

Transcription

1 Operator Basics: Storage and Distribution RCAC 2016 Online Training Series Storage and Distribution Word Search N F O Q V E U R L N E B K W S M Z I B D T L L B O L O C D S F E E R H B E A C I E L O E W B B E R E W F I Z T V T L T O A U U V R F T C R A A E B E H L S R A L S L X G R T D X V U T Q E I A A Y O H O E P S I L W L N L E U V M W P D L E R F C G P L J D K P J R C A S T S S T A N D P I P E O N P K S T E D W Q M A I W P C V V K N O H Y D R A N T R R C N A U U P A Q F Y H V Z W O I E N E T J Y T I R U C E S A N Q V B U S L E E T S E U M S S X S D S Y BAFFLING BLOCK BOLTED BURIED CAST CLEARWELL CORPORATION ELEVATED FIREFLOW HYDRANT IRON MAIN PLASTIC PVC RIVETED SECURITY STANDPIPE STEEL STOP THRUST VALVE Can you spot the difference? Total of 10 1

2 WELCOME! This training is presented by RCAC with funding provided by the California State Water Resources Control Board Division of Drinking Water (DDW) Your Moderator Today Neil Worthen Las Cruces, NM The Rural Community Assistance Partnership RCAC 2

3 RCAC Programs Affordable housing Community facilities Water and wastewater infrastructure financing (Loan Fund) Classroom and online training On-site technical assistance Median Household Income (MHI) surveys Control Tabs Audio Controls 3

4 Attendee List Today s Materials Hide/Restore Control Panel Marking Tool Questions? Text your questions and comments anytime during the session 4

5 Performance Assessment Rating Tool (PART) 4 to 6 weeks from today w/ today s workshop in subject line 3 questions 3 minutes maximum How did you use the information that was presented today? Funders are looking for positive changes Help us continue these free workshops! Where is my Workshop Brochure? If you registered for a training in the last two years no action is required If you have not registered via RCAC s website for a training in the last two years go to: and set up an account It s easy! Where is my Certificate For Contact Hours? Certificates for training hours can be downloaded and self-printed Go to and set up an account It s easy! Starting in 2016 certificates for online training hours will not be mailed 5

6 Questions / Discussion Your Presenter Today Michael Boyd Rural Development Specialist: Environmental Gering, NE mboyd@rcac.org Operator Basics: Storage and Distribution RCAC 2016 Online Training Series 6

7 Who is here today? Time for a Poll. Outline Distribution System Basics/Components Definitions Storage Tanks Operations Summary Program Implementation Ancient Water Systems 7

8 Water Distribution Systems Transport water from treatment to customer Fire protection Types of Systems Watering Point Haul System Piped Water Distribution Systems Must be capable of furnishing water of: Satisfactory sanitary quality (potable) Satisfactory aesthetic quality Satisfactory quantity Minimum PSI? Distribution System Typical Components Water mains Control valves Service lines Meters Fire hydrants Pumping stations Booster stations CCC 8

9 Distribution System Types Community NTNC TNC NC Operationally there are two. Looped Branch Cl 2 Source Transmission Storage Tree Deadends Storage Transmission Distribution System 1st Customer Cl 2 Source Transmission Storage Grid Looped Storage Transmission Distribution System 1st Customer 9

10 How do these systems operate differently? Branch Style System Looped System Text Entry-How do these systems operate differently? Branch Style System Looped System WATERING POINT CRITERIA Hose should be NSF approved material, reinforced, heat traced, and PVC lined NSF? 10

11 Watering point Rural and Tribal Environmental Solutions (RATES) HAUL SYSTEMS Water delivered to customers by truck Same hose requirements as point system Tank should be disinfected on regular basis Haul System 11

12 HAUL SYSTEM Distribution System Elements What type of water pipe do you have? Underline or circle Copper Ductile iron No idea PVC Plastic Other Steel Asbestos cement HDPE black plastic Redwood 12

13 Distribution System Elements: Pipes Pipes Amount of H 2 0 a pipe can carry is related to its size and interior surface smoothness C Factor Separation for water pipe from sewer pipe is 10 ft horizontally and 18 inches vertically PIPE MATERIALS Gray Cast Iron Pipe (Ductile s predecessor) Ductile Iron Pipe Asbestos Cement Pipe Steel Pipe Wood HDPE PVC Questions? 13

14 Gray Cast Iron Pipe Cast Iron Pipe First official record of Cast Iron pipe installation was in 1455 in Siegerland, Germany 1644 French King Louis XIV Ordered the construction of a Cast Iron pipe main extending 15 miles from a pumping station at Marly-on-Seine to Versailles to supply water to the fountains and town. The pipe served the palace gardens for more than 330 years Gray Cast Iron Pipe Cast Iron Pipe Introduced to the United States as early as 1817 when installed in the Philadelphia water system In North America, more than 600 utilities have had useful century-old CIP, and 22 utilities have had functioning CIP that exceeded 150 years in age True of False? I still have CIP in my system today 14

15 Ductile Iron Pipe 150 to 300 psi 3 inch to 64 in 18 ft 24 ft lengths Smooth Interior C value 140 Ductile Iron Pipe 1950 s 15

16 Ductile Iron Pipe vs. Cast Iron Pipe Manufactured by melting recycled steel, iron scrap, plant-returned scrap and pig iron Graphite (carbon) Instead of flakes, graphite in the iron matrix is distributed in spheroidal form Ductile Iron pipe Twice the strength of CIP CIP no longer manufactured in North America Cast Iron (CIP) and Ductile Cast Iron (DCIP) - Push on joint Gray Cast Iron (CIP) and Ductile Cast Iron (DCIP) - Mechanical joint MACHINE END ROUGH BARREL Asbestos Cement (AC) Pipe AC/Transite pipe Installed mid-1900 s Can loose strength over time-calcium leeching Repair can be problematic 16

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18 Rural and Tribal Environmental Solutions (RATES) Protect and cover pipes 18

19 Distribution System Repairs Main Breaks Evaluate the site to be excavated What type of soils, where is break, how long will ditch be open, weather Type of Equipment Can you safely operate inside the work zone Control people and traffic in the area Shoring and safety of site Ladders in 4 ft deep trench, every 25 feet, spoils 4 ft away Putting line back in service Disinfect, pressure test, BacT samples Main Breaks: Other Considerations Water Flow Excavation depth Sump Depth Shoring COUPLING DEVICES 19

20 Bell-Spigot/MJ FITTINGS Used to connect appurtenances or change direction. Appurtenances Parts of the main structure necessary to allow it to operate as intended, but not considered part of the main structure. Valves, hydrants, tees, elbows, etc. Cast iron, PVC, HDPE, stainless Flanged, mechanical joint, threaded, glued, heat fused. Cast iron 20

21 Thrust Block Locations Components in my system underline all that apply Altitude Valves Fire Hydrants AC Pipe Curb Stops Meter Pits Butterfly Valves Second non-potable system Lead Service Lines THE VALVES!!!! Used to control pressure Control flow Regulate levels Isolate sections of line Release air Prevent vacuum Introduce air Prevent backflow 21

22 VALVES Common types include: Gate Butterfly Globe Plug Ball Air control Check valves Reduced pressure zone assemblies Plug Valve GATE VALVE COMPONENTS 22

23 MAIN LINE VALVE BOX BUTTERFLY VALVES AIR VALVES Air vacuum Allow escape of air while line is filled Prevents collapse of pipe during drawdown Air release Installed at high points to collect and relieve air Combination Air release and vacuum relief (air vac) 23

24 COMBI AIR-VACUUM VALVE GLOBE VALVES Used to reduce pressure in system, control flow from pump. Only valve approved to control pressure. Throttle a gate valve? Altitude valves control level of water in a reservoir. GLOBE VALVE 24

25 ALTITUDE VALVE PLUG VALVES AND BALL VALVES Plug valve simplest of all valves Movable closure with hole Ball valves easier to operate Time for a Quiz 25

26 FIRE HYDRANTS Primary function is fire suppression Post and flush classifications WET BARREL Used in warm climates Independently operated discharge ports DRY BARREL Operating valve installed below ground Top portion drains 26

27 Dry Barrel Hydrants CUSTOMER SERVICES METERS (residential) Nutating disc Oscillating piston Turbine meter Service Lines Copper Poly PVC Others? Propeller or Turbine Style 27

28 Nutating disc and piston meters SERVICES FITTINGS TAPPING MACHINE Allows tapping main line w/o shutdown Uses saddle clamped around line CORPORATION STOP Connects the main line to the service PITORIFICE Special corp stop used in recirculating systems Tapping Machine Saddle Corporation Stop Pit Orifice 28

29 FITTINGS CONTINUED CURB STOPS Brass valve in service line, access in valve box ANGLE STOP Brass valve fastened to the meter METER SETTER Allows service line to be buried at a safe depth Rural and Tribal Environmental Solutions (RATES) 29

30 Standard Meter Installation GROUND LEVEL WATER METER VALVE BOX CORPORATION STOP ANGLE STOP METER SETTER WATER MAIN SERVICE LINE LIMIT OF UTILITY INSTALLATION OR PROPERTY LINE Customer Service Meter Installation Text Entry-Typically, how long do you think these components will last? Pipes Valves Hydrants Meters 30

31 Typically, how long do you think these components will last? Pipes 35 to 40 years Valves 35 to 40 years Hydrants 40 to 60 years Meters 10 to 15 years Standard Operations-Distribution System Weekly Review Repairs Check for visual leaks Monthly SAMPLING Log chlorine results Flushing Yearly Distribution system programs Distribution System Programs Valve Turning-Yearly Hydrant Flushing- Twice Year Meter Replacement/Repair- 10% every 5 years Leak Detection-every 5 years CCC-? 31

32 Questions? Storage Tanks Purpose Maintain pressure on system Provide flow during peak demand Provide fire demand Provide surge relief Level out pumping demand Provide detention time Water Source Blending 32

33 STORAGE TANKS STEEL Bolted Welded Riveted CONCRETE Pre-stressed Cast in place WOOD Redwood Standpipe Taller that Diameter Advantages Footprint Cost Disadvantages????? How many ft. per psi? 33

34 Elevated Storage Advantages???? Disadvantages Cost Inspection Cost Ground Level Storage Above Ground Buried/partially buried Areas with dramatic elevation change Advantages Storage Protection Cathodic Protection Low amperage current Sacrifices Iron (anode) Coatings VOC compliant Specific Thickness 34

35 HYDROPNEUMATIC TANKS Steel or fiberglass Pressurized by pump or air compressor Air pushes water into distribution system Maintain 2/3 water and 1/3 air Controlled by floats, pressure switches, ultrasonic sensors. Rural and Tribal Environmental Solutions (RATES) 35

36 Rural and Tribal Environmental Solutions (RATES) Pressure Tanks-Text Entry Advantages Disadvantages Tank Components to Maintain Inlet/outlet pipe must be kept debris free Overflow pipe discharge within one foot above ground, covered with flap valve or screen Drain connection drain water should not erode, flood or cross flow Monitoring devices: Control water level in tank Data transmitted/recorded Alarm parameters to alert operator 36

37 Valves: Tank Components to Maintain Isolation valves used to drain tank for maintenance Inspect and exercise annually (minimum) Altitude valves automatically stop flow (pumps) when water level approaches overflow Air vents: Tank Components to Maintain Allow air to enter and exit with fluctuating water levels to prevent vacuum conditions or excess pressure Should be screened to keep out animals and insects Leak Detection Part of annual program Access hatches: Tank Components to Maintain Used for entry and ventilation during maintenance and inspection Hatches on roof must have rims under the cover to prevent rain contamination Hatches at the bottom of tanks must be able to withstand high water pressure Inspect and correct deficiencies annually 37

38 Tank Components to Maintain Tank Components to Maintain Ladders: Should be 8 ft from the ground, or shielded to prevent unauthorized access Inspect annually for corrosion or wear Must meet OSHA requirements: Safety cage Safety cable or safety rail Tank Security Fence Entrance hatch locked Ladders raised up Properly vented Confined space 38

39 Standard Operations-Storage Daily-visual inspection Level Pressure gauge Security Weekly Hatch, Vents Annually Cleaning? Lighting? Polling Question When was the last time your water storage tank was inspected and/or cleaned? A. A year to five years ago B. More than five years ago C. More than ten years ago D. It s never been done E. I don t want to talk about it Summary Distribution System Storage Tanks Operations/Maintenance Programs 39

40 Questions? Time for our survey Break Time 40