Malampaya On-Shore Gas Plant
193 U-tubes, A179 Carbon Steel
1" 0 .0 . x 10 BWGx 11'2" straight leg
Severe external corrosion of bottom half of the unit, between the tubesheet and first support sheet. Additional damage was also detected up to the 4th support sheet.
Installation of CTI Shields made of 321S5, 126" long. Two wall thicknesses (.022";'028") were supplied, using the heavier walled Shields into the more damaged tubes. All Shields were hydraulically expanded their full-length followed by mechanical expansions. The plant removed/cut-out existing division plate for unobstructed access to the tubesheet / tubes. (see photo) Upon completion of the job and a successful hydrotest, Shell's Sr. Maintenance Engineer said "There will be no question about using the services of CTI again in the near future.”