(56a) 1. Properties of H2 .2.H2 Safety 4. MOC Consideration for H2service.5. Hydrogen Embrittlement 6. High Temperature Hydrogen Attack.7. H2 Accidents 8. Lesson Learned.

1. Properties of hydrogen - introduction of hydrogen to the participants including but not limited to physical properties

2. Hydrogen Safety : element hydrogen is not easily catching fire as well its fire cannot be easily detected by naked eyes. Safety considerations will be presented.

3. MOC Consideration of H2 service- material when comes in contact with H2 can cause leak ofH2. the operating conditions and criteria will be presented.

5. Hydrogen embrittlement - industrial case studies will be discussed

6. High temperature hydrogen attack- pipe network portions impact due to hydrogen will be presented here.

7. H2 Accidents: Incidents during handling and using hydrogen will be shared.

8. Lesson Learned: learning during use of hydrogen will be elaborated to upcoming hydrogen projects.