EGB Boiler details:

Maker: KANGRIM HEAVY Industries Co.Ltd

Type Designation: EA1100GY

Test pressure: 14.7bar

1. Sketch for boiler

Job Scope

1) full re-tubing EGB smoke tubes (plain tubes:1040pcs,stay tubes:94pcs).

2) Hydraulic test boiler.

Procedures for repair on site.

1) The boiler shall be in cool condition ，all water in boiler is drained out and dried.

2) Remove partially insulation plate and rockwool of gas chamber to cut if necessary.

3) Crop off tube plugs and tube ends by arc gouging，a small stud of the tube is kept in way of the end plates and remove (including any weld material remained) by grinding ，so as to any possible damage tube plate.

4) take out all smoke tubes out of boiler.

5) clean and grind tube plate and tube holes

6) MT check the plates to confirm defects free.

7) Put in the prepared new tubes through boiler gas chamber.

8) SMAW weld the tubes to upper and lower tube sheets as attached welding details .(reference to WPS 22-01 for upper plate and WPS 22-03 for lower plate ，tube ends to be expanded before and after welding).

9) Polish the new weld seams. MT check new welds to confirm defects free.

10) carry out Hydro- test: 1.5 times design pressure，the boiler witnessed by attendant surveyor and client.

11) Box up boiler back in order.