Premier Tank Services Ltd also supply many types of ancillary products for Floating Roof Storage Tanks. Other than Seals & Drain Systems, we are able to supply Integral Foam Dams, Waxscrapers, Guide Pole Seals, Leg Socks, Column Seals & Membranes/Diaphragms.
Integral Foam Dams
Integral Foam Dams are used as an alternative to a traditional welded type Foam Dam. An integral Foam Dam is installed on the same fixing point as the Secondary Seal & can be installed on either Horizontal or Vertical rims.
All Integral Foam Dams are designed to meet NFPA regulations & can be installed above any type of conventional rim mounted Secondary Seal.
The main advantages of Integral Foam Dams over welded type dams are ease of installation, no hot work required & the quantity of foam required is significantly reduced.
Wax Scrapers are used where crude oil with a high wax content is being stored. There are two traditional methods of removing the wax build up from the tank shell.
(1) Mechanical shoe type : Where a mechanical shoe seal is fitted wax scraper plates can be attached to the existing shoeplates. Ideally these extend the full height of the shoeplate to enable them to be replaced if necessary with the tank in service. Lower cost designs do exist that are simply bolted to the bottom edge of the shoeplate. The effectiveness of this system is dependant upon the pressure exerted by the seal against the tank shell.
(2) Tubeseal type : On tanks fitted with liquid or foam filled seals a separate wax scraper system is used. This is attached to the floating roof and uses hairpin springs to force the scraper blades against the tank shell. Originally designed for use with Tubeseals, but can be used with any type of foam seal or double compression plate seal.
Guide Pole Sleeves, Guide Pole Seals/Column Seals & Leg Socks
Guide Pole Sleeves : These are Stainless Steel Sleeves with PTFE liners which are fitted over the guide pole to restrict the vapour emissions from the annular space between the guide pole and floating roof of an open top floating roof tank. Installation of the unit can be carried out with the tank in service.
Guide Pole Seals & Column Seals : These are normally rubber seals made out of Nitrile or Polyurethane fabrics which are produced to seal the gap in between the Pole/Column & Pontoon Roof.
Leg Socks : The design & construction of pontoon roof legs allow vapours to escape from the annular space between the leg sleeve & also through the leg location pin holes. Any vapour emission loss represents not only a financial loss but also a potential safety hazard.
The materials can be made out of reinforced PTFE or Polyurethane fabric which are both UV resistant.
Premier Tank Services also have the capability to supply semi hemispherical shaped Diaphragm's for various Gas storage tanks.
We have also recently supplied a number of fabric shaped discs used as storage tank base liners.
Please contact us if you have any enquiries on Diaphragms or any other type of membrane requirement.