TTPS Operation Circle CAD ACWPH Unit II Dismantling and Replacement of wornout, 600 NB MS pipes in Bearing Cooling Water Supply and Return line of unit II ACW system with New 600 NB MS Seamless pipes thickness 9.53 mm ASTM SA106 Gr C pipes near Mill TTPS Operation Circle CAD ACWPH Unit II Dismantling and Replacement of wornout, 600 NB MS pipes in Bearing Cooling Water Supply and Return line of unit II ACW system with New 600 NB MS Seamless pipes thickness 9.53 mm ASTM SA106 Gr C pipes near Mill