This standard specifies the technical requirements of steel penstocks for hydroelectric and hydraulic engineering.
This standard is applicable to the manufacture, installation and acceptance of steel penstocks for large- and medium-scale hydroelectric junction engineering, and small-scale hydroelectric junction engineering may reference this standard in combination of the physical circumstances.
This standard is also applicable to the manufacture, installation and acceptance of steel lining for scouring sluice and discharge opening (hole).
1 Scope
2 Normative References
3 General Provisions
3.1 Technical Data
3.2 Material
3.3 Requirements on Measuring Apparatus and Reference Point
4 Manufacture of Steel Penstock
4.1 Manufacture of Straight Pipe (Penstock), Bent Pipe and Convergent Pipe
4.2 Manufacture of Branch Pipe and Telescopic Joint
5 Installation of Steel Penstock
5.1 Fundamental Rules
5.2 Installation of Buried Penstock
5.3 Installation of Exposed Penstock
6 Welding of Steel Penstock
6.1 Qualification of Welding Procedure
6.2 Qualification of Welder
6.3 Fundamental Rule and Technological Requirements of Welding
6.4 Weld Inspection
6.5 Defect Disposal and Repair Welding
7 Post-welding Stress-relief Treatment of Steel Penstock
7.1 Fundamental Rules
7.2 Post-welding Stress-relief Treatment
8 Corrosion Protections for Steel Penstocks
8.1 Surface Pretreatment
8.2 Painting
8.3 Quality Inspection of Painting Coat
8.4 Mellozing
8.5 Quality Inspection of Mellozing Coat
9 Hydraulic Tests
10 Packaging and Transportation
11 Acceptances
11.1 Manufacture Acceptance
11.2 Installation Acceptance
Annex A (Informative)
Annex B (Informative)
Annex C (Informative)
Annex D (Normative)
Annex E (Informative)
Annex F (Normative)
Annex G (Normative)
Annex H (Informative)
Annex I (Normative)
Annex J (Informative)
Annex K (Informative)
