Dear.P’Sumpun.S
Regarding to piping tie-in point to be tight a time for work done, We found some lack of supervision and construction controlling during tie-in as following.
- Un-safe work area, No slope preventing soil collapsed.
- No planning for piping inspection sequence ( Flushing before tie-in )
- No site survey confirm area space for cutting and welding ( cause of work too late )
Further more for cause of work too late by water remain inside we are extended time frame for work done, So please discussed to POSCO piping leader for OSBL to be improvement.
Best Regard, Chanon.P