1. ME444 ENGINEERING PIPING SYSTEM DESIGN CHAPTER 1: INTRODUCTION

2. TENTATIVE SCHEDULE BEFORE MIDTERM: THEORY OF FLOW IN PIPE, PIPE SIZING, PIPING MATERIALS, PUMP SELECTION AFTER MIDTERM: DESIGN OF VARIOUS PIPING SYSTEMS FOR BUILDINGS AND INDUSTRIES Book: dulyachot.me.engr.tu.ac.th/pipebook.pdf

3. CONTENTS 1.INTRODUCTION 2.STANDARDS 3.BASIC UNITS 4.BASIC FLOW IN PIPE 5.QUICK LOOK AT PIPE DRAWINGS

4. 1. INTRODUCTION PIPING SYSTEMS EXIST IN EVERY ENGINEERING APPLICATION. APPLICATIONS: PLUMBING, FIRE PROTECTION, PROCESS, AIR-CONDITIONING, REFRIGERATION, VENTILATION, COMPRESSED GAS, STEAM FUNCTION: TRANSMIT FLUID AT A PREFERED RATE TO THE DESTINATIONS WITH PREFERRED PROPERTIES (I.E. PRESSURE, TEMPERATURE) SESSION 1 MAIN REFERENCE: PUMPING STATION DESIGN

6. DESIGN CONCEPT SOURCEPIPING SYSTEMEND USERS

7. PIPING SYSTEM DESIGN END USERS’ REQUIREMENTS SOURCE PIPING SYSTEM PUMP MATERIAL TYPE SIZE PIPE MATERIAL THICKNESS PATHS SIZES VALVE & ACC. PRESSURE TEMPERATURE … FLOW PRESSURE TEMPERATURE …

8. 2. STANDARDS

9. ASME STANDARDS

10. STANDARDS

12. British Standard Deutsches Institut für Normung Japanese Industrial Standard Old mark (expired)

13. 3. BASIC UNITS PIPE SIZE: INCHES, mm. PIPE LENGTH: FEET, METRES VOLUME: CU.M., CU.FT., LITRES, GALLONS FLOWRATE: GPM, CU.M./H, LPS, LPM, CFM PRESSURE: PSI, BAR, m.WG., KG/CM 2 POWER: KW, HP STUDENTS MUST HAVE THE CONVERSION FACTORS

14. 7 basic quantities

15. Basic conversion Length Mass

16. Temperature

17. Area Length Mass

18. Volume

19. Volume Flowrate

20. Velocity

21. Pressure

22. Energy

23. Heat Flowrate and Power

24. Viscosity ความหนืดสัมบูรณ์

25. Viscosity ความหนืดเชิงจลนศาสตร์

26. Water Properties

27. GUAGE PRESSURE P guage = P absolute - P atm P guage is obtained from pressure measuring device.

28. 4. BASIC FLOW IN PIPE

29. Flow Pattern LAMINAR or TURBULENCE ? Re < 2000Re > 10000

30. REYNOLDS NUMBER WATER FLOW AT 1.2 m/s IN A ½” PIPE =TURBULENT Inertia vs. Viscous Effect

31. LOSS MAJOR LOSS: LOSS IN PIPE MINOR LOSS: LOSS IN FITTINGS AND VALVES

32. LOSS IN PIPE LOSS IN PIPE CAUSED BY FRICTION BETWEEN FLUID AND PIPE SURFACE. FRICTION CAN BE RELATED TO SHEAR STRESS. A PAPA PBPB B

33. VELOCITY AND LOSS LOSS IN PIPE VARIES WITH SQUARE OF FLUID VELOCITY AB

34. FLOW AND LOSS FLUID VELOCITY IS RELATED TO THE FLOW RATE VIA PIPE SIZE THUS.. C = f (DIAMETER, ROUGHNESS)

35. FRICTION LOSS CHART DIAMETER VELOCITY DESIGN VELOCITY 1.2 TO 2.4 m/s

36. FRICTION LOSS EQUATION HAZEN-WILLIAMS EQUATION (SI UNIT) DARCY WEISBACH EQUATION READING ASSIGNMENT: 3-2 FRICTION LOSS IN PIPE

37. MOODY DIAGRAM

38. MINOR LOSS LOSS IN FITTING: USE EQUIVALENT LENGTH LOSS IN VALVE: USE C V OR K V (DISCUSS LATER)

39. 5. QUICK LOOK AT PIPE DRAWINGS

40. NEXT SESSION PIPING MATERIALS AND EQUIPMENTS VALVES PUMPS

41. HOMEWORK 1 Find a water valve (in a toilet, a kitchen or the backyard). Measure inlet pipe size. Measure the flow rate from a faucet at 25%, 50%, 75% and 100% opening (in lpm). Find out the supply pressure (in m.WG.)