Floating roof tank repair Liquid escapes from two

Floating roof tank repair Liquid escapes from two leaky places of a floating roof tank. The tank is filled with high flammable kerosine, therefore the use of an absolute spark free repair method is mandatory. The necessary repair of the floating roof has been carried out at an oil group in Rotterdam / Netherlands during a cold period of the year. 1

Floating roof tank repair A 6 mm thick steel plate was fixed to the roof by using an epoxy putty in the past. Since the flexibility of these roofs is quite big the stiff steel plate was unable to follow the movements. After a few months it started to leak again and it was feared that the plate comes off completely. 2

Floating roof tank repair Generally adhesives are unsuitable to close cracks and holes. In addition to that the bonding with oily or greasy surfaces is impossible. MM-metal o. L-steelceramic (+ Hardener red) has especially been developed for the application on oily, greasy surfaces or surfaces contaminated with fuel (here kerosine) and tested and certified. Therefore it is not necessary to remove any liquid out of the tank before starting the repair. The 2 component-material enables the user to close any cracks or holes immediately. Already after partly curing (appr. 45 min. at 5 °C), the repair area can be cleaned and made grease-free for the application of further material. MM-metal o. L-steelceramic (+ Hardener red) Data Sheet 3

Floating roof tank repair In the next step two or more layers of MM-Elastomer 95, 95 a polyurethane with shorehardness A 95, is put onto the previously applied MM-metal o. Lsteelceramic and the surrounding steel area in an overlapping way. MM-Elastomer 95 This 2 -component-material can be applied by brush or spatula; a primer is not necessary. Data Sheet 5

Floating roof tank repair This leakage of a different floating roof was easily identified because the fluid on the tank shows oil-like clouds in the rainwater. 7

Floating roof tank repair Before the technicians started their work, three repaired leaks have been inspected, which have been coated with MMmetal o. L-steelceramic one year ago. They were found to be perfectly ok. 8

Floating roof tank repair Loose pieces of rust must be removed from the area to be coated while the place is kept as dry as possible at the same time. Therefore a vacuum pump was installed in a distance of appr. 25 m. Then the area is thoroughly roughened up by using abrasive paper. 9

Floating roof tank repair The repair place and an other leakage was closed with MM-metal o. L-steelceramic (+ Hardener red) Data Sheet 10

Floating roof tank repair Within the pot life it is checked if the liquid does not penetrate the curing Polymer. Metal. Then the repair spot is masktaped. 12

Floating roof tank repair MM-Elastomer 95 is applied and in the final step the masking tape is removed. 13

Floating roof tank repair Advantages of this repair method • Removal of the medium out of the tank is not necessary • Very quick repair • No use of special tools required • Even possible at very low temperatures up to 5 °C • Tested material MM-metal o. L-steelceramic offers technical reliability at application on oily, greasy surfaces or surfaces contaminated with • Compensation of flexible wave movements of the roof because of the strong but flexible material MM-Elastomer Note: After successful repair the concerned oil group recommends the use of this repair technique in their network (intranet). Before using MM-Elastomer it should be checked, if this material is resistant to the tank‘s liquid. If the material can‘t be recommended, alternative methods are possibly available. 14

MM-metal o. L-steelceramic Data Sheet 15

MM-Elastomer 95 Data Sheet 17

Polymer. Metall® made by Multi. Metall Germany invests for more than 40 years in polymer-metallic material technologies for the maintenance of metals and alloys. In plants and constructions often functional particularly important components are exposed to stresses like break, tear, corrosion, cavitation, chemical or thermal demands. Components treated with Polymer. Metals can be preventatively protected against above mentioned stresses. Furthermore Multi. Metall’s cold repair technology facilitates a gentle material treatment and a durable repair of damaged parts. Multi. Metall the Metal. Existence. Company® 19

Multi. Metall & Internet Please feel free to visit our website! At www. polymermetal. com detailed information on our products and their usage can be found. Here are some screenshots of our website: 20

Essential parts of this publication are based on the presentation and information, kindly provided by EMHA technisch bureau b. v. is our exclusive partner in the Netherlands, who successfully carries out repairs by using our Polymer. Metals for many years. EMHA B. V. Noordeinde 13 3341 LW Hendrik Ido Ambacht Netherlands Multi. Metall P. O. Box 12 02 64 41720 Viersen Germany Tel: +31 180484343 Fax: +31 180418581 info@emhabv. nl www. emhabv. com Tel: 0 21 62 -97 00 9 -0 Fax: 0 21 62 -97 00 9 -11 info@polymermetal. com www. polymermetal. com Polymer. Metall® • Multi. Metall® • Ceramium® • Molymetall® • Sealium® • XETEX® Close presentation 21