Client(s): Shell Eastern Petroleum, Exxon Mobil, Oiltanking, Vopak, Banyan Integrated Terminal, Tankstore, Helios Terminal, Universal Terminal, etc.

Main Contractor(s): Rotary Engineering, Rotary Thai Construction, Penta Ocean, Scan-bilt, L K Ang Construction, Or Kim Peow Contractors, Chartworth Enterprise, etc.

Project Details:

Impermeable high density polyethylene (“HDPE”) geomembrane is applied as a primary leak detection liner system on petroleum tank foundation pads covering both new construction and restoration of existing petroleum storage tank facilities.

In the event of excessive corrosion on steel bottom plates, oil leakages will be contained and directed to a central prefabricated HDPE sump linked to tell-tale HDPE pipes leading outside the boundary of the tank structure, thus alerting Owner(s) to a leaking tank bottom.

Since Year 1995, Green Cosmos has been installing such HDPE leak detection liner system for numerous Owners, Clients and plant operators in the oil & gas industry.

Total quantum of HDPE leak detection geomembrane liners, of varying thickness (1.5mm ~ 2.0mm), supplied and installed by our Company to date is in excess of 500,000m2 for petroleum tank foundation pads with diameter ranging from 6.0m up to 80.0m.

Pictorials provided below show selected oil & gas projects successfully accomplished by our Company and the field installation methodology including QA/QC non-destructive seaming testing on-site.


Placement of HDPE liner roll using spreader bar HDPE Leak Detection Liner placed onto tank foundation pad
Primary Welding Method - Semi-automatic hot wedge welder Secondary Welding Method - Specialized rod extrusion welder
Non-destructive air pressure test on double wedge seam High voltage spark tester used for rod extrusion seams
Connecting tell-tale pipe to HDPE sump by extrusion welding HDPE Liner terminated against HDPE Sump by rod extrusion welding

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