A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Development, experiences and qualification of steel grades for hydro power conduits
The history of the development of steels grades for penstocks and steel lined shafts for SP and PSP hydro power plants and experiences made on existing plants by comprehensive programs to check the further usability of existing prior penstocks is discussed briefly. Because of the progress made by the steel industry in the past 50 years, the Yield Strength of steels for SP and PSP raised from 400 MPa for normalized fine grain steels to 890 MPa for Q&T steels. Since 30 years TM grades are in service, recently showing Y.S. up to 700 MPa. The new high strength steel grades behave increasingly sensitive in its behavior during welding; especially the problem of hydrogen induced cracking is a crucial issue. The H induced crack appearance moved from the HAZ in the weld deposit area of the joint when welding HSS grades. Extensive Qualification Programs have been established to quantify the materials behavior of the new grades of regarding their fabrication and service behavior. The results out of that programs allowed to establish souhydro power plantsnd criteria for material selection based on a fracture mechanics, fatigue properties and stress corrosion susceptibility for an Integrity Analysis. Because of the development in the European energy market, in the recent period the influence of dynamic loading on penstocks and steel lined shafts became an additional challenge. When using high strength steel grades these findings have to be considered for successful design, fabrication, testing procedures as well as for service and monitoring conditions for existing penstocks and steel lined shafts.
Development, experiences and qualification of steel grades for hydro power conduits
The history of the development of steels grades for penstocks and steel lined shafts for SP and PSP hydro power plants and experiences made on existing plants by comprehensive programs to check the further usability of existing prior penstocks is discussed briefly. Because of the progress made by the steel industry in the past 50 years, the Yield Strength of steels for SP and PSP raised from 400 MPa for normalized fine grain steels to 890 MPa for Q&T steels. Since 30 years TM grades are in service, recently showing Y.S. up to 700 MPa. The new high strength steel grades behave increasingly sensitive in its behavior during welding; especially the problem of hydrogen induced cracking is a crucial issue. The H induced crack appearance moved from the HAZ in the weld deposit area of the joint when welding HSS grades. Extensive Qualification Programs have been established to quantify the materials behavior of the new grades of regarding their fabrication and service behavior. The results out of that programs allowed to establish souhydro power plantsnd criteria for material selection based on a fracture mechanics, fatigue properties and stress corrosion susceptibility for an Integrity Analysis. Because of the development in the European energy market, in the recent period the influence of dynamic loading on penstocks and steel lined shafts became an additional challenge. When using high strength steel grades these findings have to be considered for successful design, fabrication, testing procedures as well as for service and monitoring conditions for existing penstocks and steel lined shafts.
Development, experiences and qualification of steel grades for hydro power conduits
Cerjak, H. (author) / Enzinger, N. (author) / Pudar, M. (author)
2013
18 Seiten, 14 Bilder, 3 Tabellen, 28 Quellen
Conference paper
English
Transient mixed flow in galleries and conduits of hydro plants
| Tema Archive | 1987
| British Library Online Contents | 1999
Chinese experiences in small mini hydro power generation
Tema Archive | 1982