Standard Erection Manual (Supporting Structure) CFBC Boiler structure . This section describes mainly on boiler supporting structural erection up to drum. Over the past two decades, CFB technology—including CFB boiler Standard erection manual (pressure parts) – SlideShare Jun 19, Steam soot blowing system in CFB Boiler convective pass complete with soot trip valves, manual valves, flexible hoses and pipe work for the fuel, erection. All mating flanges and connecting materials at terminal points wherever.

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Erect all the S H steam cooled wall erection method to be followed as explained for waterwall.

cfbc boiler erection method statement

Additional temporary supports bolier to be provided with main structural members to position them. Erect the Eco upper and lower bank connecting suspension arrangement.

Drum skids – 3 Nos. If removable floors are fitted after the motor is installed, ensure that the terminal boxes or low pressure cooling water supply lines will not foul them when the boiler is on load and the circulator moves downwards due to thermal expansion.

boiler erection manual bhel

Ensure the main system is free from solids before mounting the circulators. This is to accommodate the expansion of wall. Total Silica Less than 0. For typical “Test pressure gauge range” refer table I. The DM water or Condensate treated with ppm ammonia and ppm hydrazine to have a pH value of approximately Check the elevation of the header, orientation, horizontality and distance from reference axis before arresting the header.

Between loose front waterwall tubes above front upper panel and below radiant roof. Bhel Cfbc Boiler Operation Sop.


I need the quotation of -Please select product- Steam Boiler Hot Water Boiler Industrial Autoclavethe fuel is not for autoclavethe pressure isthe capacity isused for. Impeller is mounted on the extended shaft of motor. The drier sections are not to be welded together nor to the drier supporting structure. Arrest the header erectiom shown in the ccbc. Wooden piece tied with manila rope may be used below the slings to avoid damages due to slinging.

These headers are transported to efection in four pieces and each header weighs around 40 to 45 MT. For checking verticality the following are to be carried out: These loose tubes with mark nos.

Remove the end caps and carry out sponge test and then fix all the end caps.


S H side wall outlet header. Each pump has a center inlet and two tangential discharges. It is possible by lifting alternate ends and removing the sleepers sequentially. Lift the upper Eco coils using the floating pulley system. The welds at the joints should be complete and leak proof. Final inspection before drum lifting: Hydraulic test is to be conducted after all welding of pressure parts and non pressure part attachments on to pressure parts are completed.

Hydrostatic Testing – The hydraulic test pressure reading will be taken from the official pressure gauge located at the highest point in the presence of the Inspector. Standard erection manual pressure parts Check the width and depth of second pass. Cfvc tubes are welded with inlet headers and rear tubes are welded with rear header stubs.


Extreme S H screen tubes and S H extended steam cooled wall. After hoisting to its final elevation support channels are fixed to permanent support rods and headers suspension lugs to the permanent tie rods. These are around 25 such assemblies supporting superheater and Reheater coils.

Approved procedure for the contract to be followed for each boiler. Air Testing the pressure parts – Before filling the boiler with water an air tightness test is to be performed to detect leakages due to valve left in open position, X-ray plug forgotten, any cuts or gouges etc. In this condition motor load is transferred to chain type hoist.

At this stage, the gap between the flange faces should be equal all round the flange. Temporary binders are removed and support lugs on tubes are welded with the end bars at the location shown in the drawing Radiant roof tubes are erected after the erection of all top headers, suspensions, S H links and end bar assemblies.

Clean the weld edge preparation and apply weldable primer and fix all end caps.

The following method statement is written to provide a safe and efficient system of work for the installation of general working scaffold to all areas of construction sites both internal and external. Between tubes in upper corner transition tubes. Si0 PPM 2 Less than 0. Keep 3mm clearance for the guides to move down without any obstruction for boiler expansion.