EXTERNAL FLOATING ROOF
SEALS FOR STORAGE TANKS
EXTERNAL FLOATING ROOF SEALS FOR STORAGE TANKS
Introducing TECHCOM SERWIS premium sealing solutions for floating roofs
No Welding Required: The seal can be installed while the tank is in service, eliminating the need
for welding.
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No Gap Design: Engineered to maintain consistent tension, preventing gaps and ensuring a tight
seal over time.
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Custom Fit: Customized to each tank's specific dimensions to ensure a perfect fit and optimal
sealing.
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Water Shedding Capability: Excellent ability to shed water, keeping the seal intact.
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Variety of Materials: Available in a range of metallic and non-metallic materials to suit various
environmental and service conditions.
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Innovative solutions
Reliable roof integrity
OUR COMPANY IS DEDICATED TO
DELIVERING NOT JUST A PRODUCT, BUT A
PROMISE OF:
SAFETY,
EFFICIENCY,
ENVIRONMENTAL RESPONSIBILITY.
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Sealing excellence
High quality materials
Static dissipation
SAMPLE SCHEDULE FOR REPLACING A WORN-OUT SEAL
Replacement of the seal with a new TS-PUD-1 type seal
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Assessment of the Seal
Condition
Surveying
Measurements +
Engineering
Selection of the Optimal
Solution
Dismantling of the Old
Seal
Installation of the New
Seal
Expertise,
Measurements,
Additional Work
SEAL TYPES
Type F
Type I
TS-PUD-1
Type L
GROUNDING OF THE EFR AT THE SEAL
Our tank seals are fortified with grounding systems
compliant with EN 62305-3:2011, strategically placed at
1.5-meter intervals to ensure comprehensive
protection.
These systems are essential for preventing ignition
from static electricity or lightning, enhancing the safety
of operations.
Our commitment to safety is demonstrated through
these advanced grounding solutions, safeguarding both
our workforce and the environment from potential
hazards.
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Seal type number:
TS-PUD-1
Seal type name:
Double Compression
Plate
with NBR antistatic
equipment
Standard compliance:
API 650 and
EN 14015
Rim space:
70 to 450 mm
Service life:
up to 25 years
Volume resistivity:
< 1*106 Ω
Hardness (Shore A):
~ 60-70
Assembly options:
Vertical or Horizontal
Material Advantages
Low Electrical Resistance:
Our seals boast an electrical resistance of less than 106 Ω,
mitigating risks associated with static discharge.
High Hydrocarbon Resistance:
Designed to withstand a variety of hydrocarbons, these seals
maintain integrity in the presence of petrochemical products.
Superior Abrasion Resistance:
Durability is key, and our seals are proven to resist wear and
tear, ensuring longevity even under harsh operational conditions.
EFFECTIVENESS OF EXTERNAL FLOATING ROOF SEAL
Benefits of using an EFR TS-PUD-1 seal in oil
storage tanks:
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VAPOUR EMISSION VALUE
It significantly reduces vapor emissions,
which are a major environmental concern
due to their contribution to air pollution and
the greenhouse effect. A 95% reduction in
emissions means a substantial decrease in
the release of volatile organic compounds
(VOCs) into the atmosphere.
This reduction in vapor loss also translates
to a financial advantage, as it minimizes the
amount of product loss, maximizing the
quantity of oil that can be sold or
processed.
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TANK WITH EFR SEAL
TANK WITHOUT EFR SEAL
EFR SEAL – BEFORE & AFTER REPLACEMENT
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WHAT CAN WE DO WITH THE SEAL OF A STORAGE TANK (BEYOND REPLACEMENT)?
Replacement of the upper wiper of the
seal
• Without dismantling the entire seal, we are able to replace the upper sealing wiper. We
can change the type of rubber and its shape.
Replacement of the grouding on the
upper wiper of the seal
• Often, the standard distance of 1.5 meters between the grounding plates around the
perimeter of the tank is not maintained on tanks.
We address this issue by using specially designed plates that ensure tight adherence to
the tank's shell, utilizing plates made from a special type of spring steel. This ensures
both compliance with the required spacing and enhanced grounding effectiveness.
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Raising the foam dam of the EFR
• The purpose of raising the foam dam is to increase the maximum fill level of the tank and
to meet the requirements of API and EN standards regarding the maximum difference in
levels between the top of the seal and the foam dam.
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Extension of the lower seal’s vaporretarding skirt
• The extension of the skirt is implemented in cases where its submerged part has been
damaged by the medium or during the modernization of the floating roof pontoon. The
connection is made using a metal connector with sealing rivets.
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