BOILER FEED PUMP ERECTION AND COMMISSIONING PART-III ABC OF THERMAL POWER PLANT

PART –III

Continuation from PART-II

Placement of pump pedestal  & grouting with ready mix grout.

Mounting of pump on the pedestal

Mounting of booster pump & alignment with BFP motor

BP/BFPs bearings checking, clearance setting and box-up

Mechanical seals checking/inspection and mounting of BP/BFP (Both for DE/NDE)

Alignment of pump with hydraulic coupling complete.

Completion of mechanical  seal cooling water lines, Auxiliary cooling water line  ,placement of coolers after Hydraulic testing.

Installation of seal water cooler.

Following erection checks to be carried  during the process of erection.

Position  & elevation of foundation (elevation within+5mm/-10mm). Check that depth and verticality of each pocket is OK.

Distance from fixed reference axis e.g. A-row, B-row Columns. (1mm / metre,  5mm Max.)

Marking of equivalent axes on foundation.

Blue matching of the packers to have a minimum of 80% of contact area between each other and with bottom of foundation frame.

Ensure that machined surfaces and surfaces exposed to grouting in foundation frame    

    

are free from paint, rust, scale.

Fitting of half couplings to all equipment after ensuring corresponding fits.  For taper coupling,

ensure around 80% contact between shaft & coupling.

Blue matching the top surface of foundation frame with corresponding bottom surfaces of

equipment with around 80% contact.

Measure distance between  coupling half faces of

               -Booster Pump and motor

               -Motor and Hydraulic coupling

              - Hydraulic coupling and Main Pump.

Alignment (lateral and angular) between Booster pump & Motor, Motor & Hydraulic coupling,

             

Hydraulic coupling & BFP. Measure distances between coupling flanges.

Ensure that the entire pipeline is supported by permanent supports before making the last four    

Joints. (i.e  Booster Pump suction and discharge and Main pump suction and discharge).

Distances and alignment readings between coupling half faces of BFP & Hydraulic coupling,

Hydraulic coupling & motor, Motor & Booster pump after completing pipe connections.              

We have till date described only MDBFP for TD BFP except prime mover every thing will be same. Next Part i.e PART IV we will discuss about TDBFP in brief.

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