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NOZZLE COMPENSATION - Regulation 571

Width of any opening exceeds two and a half times the

thickness of the shell plate in inches plus 2.75

w > 2.5(ts) + 2.75 inches

then compensating plate required

Nozzle Mark A2/A3/A5/D

Service BFW INLET/STEAM I/L/

TSP INJECT/DRAIN

Material SA 106 GR B

Size NB 2

Nozzle location on shell/dish SHELL

ts= Actual thickness of shell 0.55

width of opening parallel to longitudinal axis 2

2.5*(ts)+2.75 4.125

Compensating plate required as per eqn. NO

As w < 2.5(ts) + 2.75, compensating plate is not required

for all nozzles except M

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B4A, BB5/LT2A,LT2B/LT3A, LT2B TW/V/PI, THERMOWELL

BLOWDOWN/ VENT

LEVEL TRANSMIT CONTROL PRESSURE INDICATOR

LEVEL TRANSMIT LSLL

SA 106 GR B SA 106 GR B

2 2

SHELL SHELL

0.55 0.55

2 2

4.125 4.125

NO NO

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B3 W1/W2

LP STEAM O/L LP STEAM O/L

SA 106 GR B SA 106 GR B

8 6

SHELL SHELL

0.55 0.55

8 6

4.125 4.125

NO NO

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M

MANHOLE

SA 516 GR B

24 in

SHELL

0.55 in

12 in

4.125 in

YES