Punch point

nIts important for any power plant to idtify the punch point, during the errection

1. PUNCH POINTS
MECHANICAL &
CONSTRUCTION

2. No approach provided for Steam coiled air pre-heater(SCAPH)
valve Operation & maintenance.
Location-06 mts.

3. No approach provided for Main steam stop valve (MSSV)
Operation & maintenance.
Location-65 mts.

4. No approach provided for Eco to drum feed line vent valve
Operation & maintenance
Location-57 mts.

5. Hanger rod found bent of attemperation line
Location- 50 mts.

6. Hand hole door beside soot blower found damaged.
Location RHS-54 mt.

7. Manhole door in 1st pass fouling with junction box.
Location RHS-60 mt.

8. Manual handle of Eco feed regulation valve got damaged. Need to be
replace.
Location LHS-34 mt.

9. Construction Rod found welded in hand railings.
Many locations

10. Obstruction due to permanent supported beam on the walk way.
Location RHS-50 mt.

11. ESP TOP FLOOR APPROACH AREA
The staircase is very steep
and also the width of
stairs is very less.

12. TRANSFER TOWER 02
Rail track foundation found in damaged condition for 4A conveyor.

13. TRACK HOPPER
Huge seepage in
underground walls of
Track Hopper

14. TRACK HOPPER
Huge seepage in
underground walls of
Track Hopper

15. TRANSFER TOWER - 01
Underground water
coming with very high
speed

16. TRANSFER TOWER - 02
Seepage observed at
underground walls

17. Some Other Punch Points
Sr.N
o. Main plant
1mill MDV cylinders are not accessible
2classifier vane adjusting handle is missing
3seal air line rubber bellow proper clamping not done
4Mill fire fighting water line is not provided.
5FD Fan interconnect damper link is not straight
6Fan Hoist not yet installed
7PA Fan B metallic bellow damage
8APH B side flue gas bellow damage

18. PUNCH POINTS
ELCTRICAL

19. Ground floor MCCs - MCCs near to water or steam line to be covered with
fire proof sheets all around to avoid entering of water/steam in case of
leakage.

20. GT - Over head DM Tank is close to 220 KV Over Head Line. Near
Unit #2 GT gantry, And the ladder for tank is provided towards
Over head Lines.

21. Generator NGT Panel -Pipe Line restricts complete opening of NGT
panel.

22. JOP Motor -Motor Terminal Box not sealed properly

23. Local Panel - LCS Panel No Identification.

24. TT3 Cable Rack - Cable Racks are uncovered. It is near to 540 coal
yard. No fire retardant coating on cable.

25. 220 KV SWYD - Gravels not laid in charged Switchyard.

26. CEP Motor - Approach to work at Motor JB not available

27. M-BFP - Cooling water line is so close to motor power JB.
Maintenance is difficult.

28. PUNCH POINTS
C & I

29. C & I Punch Points
Sr.No
.C&I Main plant
1 Fan brg vib probes are inside the casing & not accessible from outside. Difficult to maintain in running condition.
2 Sipos actuators are given without display there for calibration & troubleshooting of these actuators are not possible
3 Gun Sov Box is not accessible also the box door is fouling with scanners so can't be opened.
5 Down comer and other LK type actuators are not in healthy condition (oil leakage/handle/wheel missing/rusting etc)
6
Instrument air header drain at lowest point with drain valve/actuator required.
Interlock of opening this drain with boiler mft has to be made.
7
Mill instruments (flow/pressure/DP etc) impulse piping is too long. Impulse tube dia is also less for the application.
This requires an automatic purging solution
8 Sealing for the instruments cables coming out of mill through seal air header is not proper
9 Mill i/l gates are not accessible also there control cabs.
10mill inert steam manual isolation and actuators are not accessible
11Tech doc clause 4.10.00 violated in many locations instrument rack. Instrument readings not possible to read out.
12APH hopper ash vessel temp measurement required
13APH/economizer ash vessel dome valve position feedback required
14cold pa actuator access not available
15scaph actuator access not available
16TD BFP barring gear position indication is not available
17actuators at aux stm header installed too congested, can be rotated for easy access and O&M
18Foxboro graphics are not good (congested/parameters overlapping each other and lines etc)
19Engineering station keyboards are normal key board, required is an engineering keyboard.
20Keyboards are not configurable

30. 21triple module redundancy not ensured in triconex system
22ETS system does not incorporates all the trip logics such as ms temp low/high/rate of tem drop etc
23boiler trips on turbine trip if load is >30 %
24exchange duty room in CCR is not ready
25Fire detection and alarm system is not ready
26
Grid grounding is used. Electrical and c&I grounding are common. Grounding rods are made of MS.
It’s impossible to maintain grounding grid.
27DCS operating system must be upgraded from ICC to IACC
28
All the operating system (Dell PCs are registered in the name of Foxboro, registration transfer to balco is
required)
29All the operating machines & HMI must be industrial grade. Certification for the same is required.
30Spray control valve not yet installed.
31spray flow meter not yet installed
32pressure and temp transmitter required at each spray line (SH I/SH II/ SH III/RH)
33Flow transmitter at BFP R/C line is required.
34horizontally installed actuators need support to handle their weight
35I&C lab is not ready.
36Drain line and funnel to collect drain bellow every instrument rack is required.

31. 37temp probe at vp i/l is required
38
TD BFP Lube oil station instrument require improvement (sleeve damage/panel door
missing/instruments missing)
39
Many places at high temp line rotor actuator used. rotor actuator are failure at high temp line.(for
example at hph emg drain)
40
Many places normal cable used at high temp area without sleeve, may get damage.(fo e.g steam line
drain pot level switch.
41bfp brg temp local indication not given
42
Aux steam header actuator/valve placed very near and the location is very congested. Can be rotated
for easy access.
43All hydrogen system panel need cleaning and internal lighting.
44All PCs language is in Chinese, need english language.
45MCS logic not yet completed
46Barring gear is not having any soft starter
47barring Speed and current didn't came in deh graphics during trial run
48Cross ferruling not done.
49JOP pressure Transmitter required