1. CGA Conference 21-22 October, 2003 Update on G-4.4, Industrial Practices of Gaseous Oxygen Transmission and Distribution Piping System

2. 2 Introduction Purpose Time Line of Events Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E

3. 3 Purpose Background:  Two documents relating to industrial practices for gaseous oxygen transmission and distributing piping systems CGA – G-4.4 EIGA/IGC – 13/82 Goal:  To harmonize two above mentioned documents and create a single global document

4. 4 Time Line of Events

5. 5 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Expanded Table of Contents More detail analysis for material selection based on gas velocities

6. 6 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Expanded table of contents  Items that have been added to CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Cleaning (section 6) Design and construction of stations (section 8) General protective measures (section 10) More detail analysis for material selection based on process gas velocities for both impingement and non- impingement sites

7. 7 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Expanded table of contents  Items that have been added to CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Cleaning (section 6): Specification and manufacture of line pipe materials Pre-cleaned piping Post-installation cleaning Inspection

8. 8 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Design and construction of stations (section 8): Function Design brief Standards and design codes Materials Barriers and screens Location Earthing, grounding Fabrication Installation Testing Commissioning Operation

9. 9 General protective measures (section 10): Emergency response plan Power supplies and lightning strikes Fire Oxygen deprivation hazards and precautions Accident and damage report Safety management system Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E

10. 10 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Key differences in two documents

11. 11 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E More detail analysis for material selection based on process gas velocities for both impingement and non- impingement sites  In CGA G-4.4 (3 rd Edition, 1993, Figure 1): Figure 1: Material selection chart per G-4.4 (3 rd Edition, 1993, Figure 1)

12. 12 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E  In CGA G-4.4 (3 rd Edition, 1993): Applicable to non-impingement sites Equation of curve as follows V= 200 (ft/s) (for 0 < P < 200 psig) V= 188000 x P -1.292 (for 200 < P < 1000 psig) –V – Gas velocity (ft/s) –P – Gas pressure (psig) Regions of graph as follows –A – Carbon steel, stainless steel, or copper or nickel alloys –B – Stainless steel (1” NPS min. & 1/8” thk. Min.) or copper or nickel alloys –C - Copper and nickel alloys

13. 13 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E  In CGA G-4.4 (4 th Edition, 2003, Figure 1): Figure 2: Material selection chart per G-4.4 (4 th Edition, 2003, Figure 1) for impingement scenario

14. 14 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E  In CGA G-4.4 (4 th Edition, 2003, Figure 1) EIGA 13/02/E: Applicable to impingement sites Equation of curve as follows: If 45 psia (0.3 MPa) < P < 225 psia (1.5 MPa) then V = 100.0 ft/s (30.0 m/s) If 225 psia (1.5 MPa) < P < 1500 psia (10.0 MPa) then PxV = 22,500 psia ft/s (45.0 MPa m/s) If 1500 psia (10. 0MPa) < P < 3000 psia (20.0 MPa) then V = 15.0 ft/s (4.5 m/s)

15. 15 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E  In CGA G-4.4 (4 th Edition, 2003, Figure 2): Figure 3: Material selection chart per G-4.4 (4 th Edition, 2003, Figure 2) for non- impingement scenario

16. 16 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E  In CGA G-4.4 (4 th Edition, 2003, Figure 2) EIGA 13/02/E: Applicable to non-impingement sites Equation of curve as follows: If 45 psia (0.3 MPa) < P < 225 psia (1.5 MPa) then V = 200.0 ft/s (60.0 m/s) If 225 psia (1.5 MPa) < P < 1500 psia (10.0 MPa) then PxV = 40000 psai ft/s (80.0 MPa m/s) If 1500 psia (10. MPa) < P < 3000 psia (20.0 MPa) then V = 26.6 ft/s (8.0 m/s)

17. 17 Example:  Conditions: Fluid: Oxygen Flow: 400,000 SCFH (70 °F, 14.7 psia) Operating pressure: 400 psig Operating temperature: 100 °F Atmospheric pressure: 14.7 psia Pipe Size: 4 inch, schedule 40  Two Scenarios: 1.) Impingement: Branch Tee 2.) Non-impingement: Straight Pipe Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E

18. 18 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Example Calculations for Actual Flow: Flow = 249.69 acfm Where, P 1,T 1,V 1 = Base conditions (14.7 psia, 70 °F) P 2,T 2,V 2 = Actual conditions (400 psig, 100 °F)

19. 19 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Example Calculations for Area: Pipe Area = Pipe Area = 0.0884 sq. ft.

20. 20 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Example Calculations for Velocity: Gas Velocity = 47.07 ft/s Gas Velocity =

21. 21 Example: 1.) Point of impingement: Branch Tee Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E 4 inch Pipe

22. 22 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Example:Impingement velocity calculations and comparison to allowable velocity

23. 23 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Example: 2.) Non-impingement: straight pipe 4 inch Pipe

24. 24 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Example: Non - Impingement velocity calculations and comparison to allowable velocity

25. 25 Key Differences in CGA G-4.4 (3 rd Edition, 1993) and CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E Given below is a listing of the most commonly used metals See Appendix D of CGA G-4.4 (4 th Edition, 2003) EIGA 13/02/E for a complete listing of materials