News
img
LNG Main boiler superheater retubing in 2022
2023-02-14

LNG Main boiler superheater retubing in 2022

1.Main boiler details: Maker:   MITSUBISHI MARINE BOILER CO.,LTD Type:    MB Design pressure:  7.65MPa    Class:  LR 2.Boiler sketch 3.No.2 main boiler statement 3.1 One tube in 5th pass leaks. 3.2 One tube in 3rd pass is in bad condition. 3.Repair scope: 4.1Replacement of successive 4 panel coil elements (sacrifice 3 panels as access) including the plugged coil in the pass 5 and the successive 4 panel coil elements including the corroded tube in the pass 3 of superheater (shown as the following sketch marked with blue square box). Material: 2.25%Cr-1%Mo steel Tube size: Φ38.1 5Repaired on site:  The replacement of the 4panels tube coil in the pass 5 and 4 panels in the pass 3 of the superheater  5.1Isolate and drain the main boiler. 5.2 Remove the cover under the superheater headers after remove the cladding and insulation sheet. 5.3 Remove the superheater corridor refractory in way of repair. 5.4 Cut the 4 panel coils in the pass 5(No.5, No.6, No.7&No.8 panel counted from front side)and pass 3(No.4, No.5, No.6 & No.7 coil counted from front side)out of boiler. 5.5 Remove the tube stubs out of superheater headers. 5.6 Dye check the tube holes in headers to make sure defect free after grinding. 5.7 Install and fix the new panel in position (the tube end is 2~4mm above the tube plate). 5.8 Heat the superheater headers to 150~200℃ 5.9 Weld the tube ends to super heater headers by coded welders. 5.10 Dye check the new weld to make sure defect free after cool down and polish. 5.11 Hydraulic test the boiler witnessed by attendant surveyor and client. 5.12 Build up new superheater corridor refractory. 5.13 Box up the boiler in order. Replacement of the control desuperheater  No.1 & No.2 main boiler furnace refractory repair   Touch up with refractory the furnace floor around the screen tubes for both boilers.
Learn more

EUROMARITIME in MARSEILLE, FRANCE (28-30, June, 2022)

2022-07-01
dea

How to confirm normal combustion indicators for marine boilers

How do we confirm the normal combustion indicators of marine boilers in the operation process?
2022-04-26
dea

2022 Safe Sailing starts with setting a Good Maintenance Plan flag!

As 2022 sets sail, every ship is looking forward to a safe and trouble-free year at sea.
2022-04-26
dea

The ship's runway collapsed in several places and all four gas boilers were burnt out

The Kuznetsov aircraft carrier, which is scheduled to be overhauled and returned to active service by the end of 2022
2022-04-26
dea

Failure mode and failure mechanism analysis of aluminosilicate refractory fibres for marine boilers

There are a large number of problems with aluminosilicate refractory fibres for the main boiler hearth of ships: the refractory fibre surface coating is all chapped
2022-04-26
dea
Pre
1

Copyright © 2022  Boilerman International Service Ltd. 

沪ICP备13030285号-2  IPv6 SEO  Powered by 300.cn

LISTEN TO THE VOICE OF EVERY CUSTOMER

留言应用名称:
客户留言
描述:
验证码