24″ LEAKING BURIED CRUDE OIL LINE
The 24” line buried 10 metres below the ground, had suffered from external corrosion which led to a through wall defect.
Case Histories
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Welcome to the Metalyte Pipeworks Case Histories.
Here you will find examples of repairs performed by our expert technicians in some of the toughest and hazardous situations imaginable.
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3 x 24″ Water Lines
The 3 x 24” lines had suffered from excessive external corrosion at the bottom of the lines which are exiting the concrete floor.
1090mm heat exchanger expansion joint
The heat exchanger was subjected to thermal cycling that caused a crack to appear at the edge of the expansion joint
20″ Wet Air Line
The 20” line had suffered from CUI external corrosion on the pipe coming off the vessel.
6” leaking Steam Line Flange
A flange joint connection on a 6” steam line had failed due to possible gasket or flange face issues
2” NB Internally Corroded Line with a Resin Fill Clamp
The 2” NB line detailed above has suffered from internal corrosion.
1” Leaking Valve on 1500 HP Steam Line
A 1” valve on a HP steam line had a leak coming from the bonnet.
24” leaking discharge valve
The 24” line had suffered from severe internal erosion resulting in a through-wall slot defect at a lap joint flange.
18” Water Injection Line
The 18” water injection riser clamp joint had suffered from movement inside the retaining clamp when operating at high pressure.
30” Corroded Natural Gas Line
A long section of this line is suffering from multiple external corrosion scabs resulting in a minimum remaining wall thickness of approximately 14-18mm.
24″ Cooling Water Line
The 24” line had suffered from external corrosion. This resulted in several through wall defects along the butt weld near the flange
20” leaking Seawater filter line
During normal operating conditions a seawater leak was identified on the seawater supply line.
4″ To 6″ Seawater Tee
The 4”x6” GRP Tee had suffered from a crack resulting in a through wall pin hole leak.
2″ Degasser to Closed Drains Header
The 2” line detailed above has suffered from a series of cracks and though wall defects resulting in various leaks through out the full line
8″ Produced Water Line Leak (Crude Oil Cooler & M.P Seperator)
The 8” line had suffered from internal corrosion/erosion. This resulted in a through wall leaking defect close to the valve flange assembly at the 4 o’clock position
6″ Hydrogen Line
The 6” Tee with 4” branch had suffered from external corrosion close to the Tee.
20″ Inlet Pipework to seawater
The 20” line had suffered from internal erosion. This resulted in through wall defects on the flange.
8″ Steam Header
The 8” steam header had suffered from internal erosion causing a through wall defect.
Water Seal on outside of Flare Vessel
The water tank had suffered from possible internal acid corrosion.
24″ & 30″ Crude Oil Line Leak
The 30” Crude oil line had suffered from (CUI) external corrosion.
48″ Sea Water Line
The 48” Cooling Water line had suffered from external and internal corrosion.
1/2″ Hydrocarbon Gasoline Line
The ½” hydrocarbon gasoline line has suffered from internal, external corrosion.
10” Benzene Leak
The 10” Benzene line had suffered from severe CUI. This resulted in several large corroded areas resulting in multiple through wall defects.
4″ Stabilised Condensate Line
The 4” Condensate line had suffered from coating damage resulting in a localised corrosion area.
