ELEVATED SUBSTATION IN SEK Doc. No.: 50614-000-FA5-PRO-0008Doc Title: Fabrication and Installation Procedure for U/G Piping Date: 19-Jan.-2014

Rev.CAttachment # 5: FLOW CHART FOR PIPING WORK PROCEDURE

TRANSPORTATION OF PLAIN END PIPE TO IMCO BY SKEC

UNLOADING IN IMCO WORKSHOP BY IMCO

ALL SPOOLS WILL BE FABRICATED IN IMCO

WORKSHOP

FIT-UP & WELDING OF SPOOLS WILL BE CARRIED OUT IN IMCO

WORKSHOP

ALL WELDING JOINTS ARE 100% SHOP JOINTS

THERE ARE NO WELDING JOINTS IN FIELD & ONLY BOLTING

JOINTS ARE ALLOWED IN FIELD

ONCE THE FABRICATION OF SPOOLS ARE COMPLETED, NDT WILL BE CARRIED OUT

ON SPOOLS

AFTER NDT IS CLEARED, HYDROTEST WILL BE CARRIED

OUT ON ALL SPOOLS (100% HYDROTEST) IN IMCO

WORKSHOP

AFTER HYDROTEST, THE SPOOLS WILL BE

TRANSPORTED TO NCC COATING WORKSHOP BY

IMCO

THE SPOOLS WILL BE UNLOADED BY NCC. INTERNAL

& EXTERNAL COATING WILL BE DONE IN NCC YARD. AFTER

FINAL INSPECTION FOR COATING, IT WILL BE LOADED

BY NCC

AFTER COATING IS COMPLETED, THE SPOOLS WILL BE TRANSPORTED TO RESPECTIVE GC BY IMCO

ONCE THE CIVIL EXCAVATION ARE COMPLETED AND INSPECTIONS

DONE, THE PIPE WILL BE LAID IN THE EXCAVATED AREA & BOLTING OF FLANGE JOINTS WILL BE DONE.

AFTER, BOLT TORQUE TIGHTENING WILL BE DONE ON BOLTED JOINTS

INSPECTION NOTIFICATION WILL BE SUBMITTED TO PMC BEFORE 24 HOURS PRIOR FOR HYDROTEST

AFTER ALL BOLTING JOINTS ARE DONE IN FIELD, FIELD HYDROTEST WILL BE CARRIED OUT TO CHECK

FOR ANY LEAKS

AFTER HYDROTEST ARE DONE , HOLIDAY TEST FOR COATED PIPE

WILL BE INSPECTED

SUBMIT INSPECTION NOTIFICATION FOR SURVEY REPORT PRIOR TO BACKFILLING

AFTER SUCCESSFULLY COMPLETING THE INSPECTION, THE BACKFILLING

WILL BE CARRIED OUT