Repair of Water Wall Tubes of Soda Ash Recovery Boiler (KHI) with supply of tubes etc. in Petrochemical Plants-UC.

Amount

Repair of Water Wall Tubes in KHI Boiler

Supply of Boiler Water Wall Tubes of size 76.2 MM OD with thickness 3.5 to 3.7 MM, IBR certified, ASTM SA 192 SEAMLESS, or equivalent or superior material as approved by M/s.FACT Ltd. along with relevant certificates, at FACT Udyogamandal. The tubes shall conform to the specification. Tubes shall be supplied in random lengths of 4.00 to 8.00 Mtrs long without joints.

Complete execution of replacement of defective lengths of the Water Wall tubes, of size 76.2 MM OD and thickness min. 3.5mm to max. 3.7 MM, at specified locations in KHI Boiler which include:- (a) Obtaining necessary IBR approvals / clearance etc. at all stages like Preparation of documents / repair procedure and getting concurrence from F&B for carrying out repair work, as directed by F&B/FACT and as per relevant drawings and also the FINAL approval after completion of work.[FACT scope with regard to IBR approval shall be limited to forwarding of applications and payment of prescribed fees]. (b) Cutting the defective length of tubes with fins at various locations in Boiler. (c) Fabrication of suitable tube pieces with FINs. (d) Edge preparation of existing tube ends, fit-up of pre-fabricated new tube pieces in appropriate positions and welding by TIG with 100% radiography of weld joints of tubes. Filler wire used for TIG welding shall be ER70 S2. Inert gas shall be ARGON Payment shall be made for INCH DIA of completed WELD JOINTS

Fabrication of fins of suitable length and width from 6/8 mm Plates,Welding of fins to tubes by TIG process ,fin to fin joints by TIG/SMAW process. Welding shall be done from inside and outside to avoid flue gas leakage. Payment by FACT for this schedule item will be in Meter Length of TUBE pieces replaced.

Dismantling and refixing the windbox with FO/HR/PILOT Burner units on both sides - NORTH & SOUTH- of Boiler for accessing the wall tubes and boxing up after tube repair work, including cutting and welding, if required.

Carrying out Hydrotest of the boiler after completing the repair.

Scaffolding inside the furnace, using suitable scaffolding material for the safe execution of work, including its supply,erection and dismantling.

Providing safe working Platforms with 0.30 Mtr width x 3.00 Mtr long (approx.) of suitable material.Required material shall be brought by contractor.

DIPAK CONSTRUCTIONS

HIND ERECTORS

MBM ENGG WORKS