75
3.5
Inspection Checklist
Penstocks and Outlet Pipes
Inspection Interval
1. Supports
A
NS
2.Expansion joints
A
NS
3. Exterior
A
NS
4. Interior
A
NS
Gates and Valves
Abbreviations in parenthesis refer to the types of gates or valves a particular inspection item refers to.
FW
- Fixed wheel gate
DG -
Drum gate
RG -
Radial gate
CG
- Coaster gate
JF -
Jet flow gate
BV -
Butterfly valve
RS -
Ring-seal gate
SG -
Slide gate
HJ -
Hollow jet valve
RF -
Ring-follower gate
CY -
Cylinder gate
TV -
Tube valve
BH -
Bulkhead gates or
stop logs
5. General inspection (FW, CG, RS, RF, BH, DG,
A
NS
JF, SG, CY, RG, BV, HJ, TV)
6. Seals and seal seats (FW, CG, RS, RF, BH, DG
A
NS,
JF, SG, CY, RG, BV, HJ, TV)
7. Gate frames and tracks (FW, CG)
NS
8. Roller and wheel assemblies (FW, CG, RS)
NS
9. Pivot pins and hinges (DG, RG)
A
10. Gate frames and bonnets (RS, RF, JF, SG)
A
NS
11. Gate leaf, skin plates, and structural members BV)
A
NS
(FW, CG, RS, RF, BH, DG, JF, SG, CY, RG,
12. Valve body (BV, HJ, TV) and valve needle or
A NS
tube (HJ, TV)
Gate and Valve Operators and Hoists
13. Threaded stem hoist and mechanical operators
A
NS
(FW, CG, RS, RF, JF, SG, CY, HJ, TV)
14. Chain hoists (FW, CG, RG)
A
NS
15. Wire rope hoists (FW, CG, BH, RG)
A
NS
16. Hydraulic hoists (FW, CG, RS, RF, JF,
A
NS
SG, CY, BV, HJ)