Primary — B
Formed-sheet primary seal combining flexibility and shell contact.
EZseal configuration
EZseal BC
Bent sheet / compression shoe primary + Compression plate secondary
A two-stage rim-seal configuration combining the EZseal B primary mechanism with the EZseal C secondary system. Final geometry and materials are established from the actual tank and roof operating envelope.
Design intent
The code identifies the mechanism. The tank still decides the design.
The primary sealing element is formed to create its own controlled spring action. The detailed profile, overlap, material and vapour barrier are engineered around rim-space variation, shell condition and the roof configuration rather than treated as a one-size-fits-all component.
A rim-mounted secondary barrier using spring/compression plates and a project-selected sealing material. It provides a second controlled barrier above the primary seal and can be configured for internal, covered or external floating-roof service.
Engineering priorities
What the design has to get right.
Secondary — C
Rim-mounted compression-plate secondary seal.
Working envelope
Minimum, nominal and maximum rim space are checked against shell condition and roof movement.
Project materials
Metal, fabric and polymer selections are matched to product service, temperature and the project specification.
Configuration
EZseal BC
B
Primary seal
Bent sheet / compression shoe
The primary sealing element is formed to create its own controlled spring action. The detailed profile, overlap, material and vapour barrier are engineered around rim-space variation, shell condition and the roof configuration rather than treated as a one-size-fits-all component.
+
C
Secondary seal
Compression plate
A rim-mounted secondary barrier using spring/compression plates and a project-selected sealing material. It provides a second controlled barrier above the primary seal and can be configured for internal, covered or external floating-roof service.
Scope
Where this combination starts
- Project-specific retrofit or new-build applications that benefit from a compact formed-metal primary concept.
- General secondary sealing where a robust metallic spring system and defined shell contact are required.
- Rim-space survey and shell-condition review before final geometry is released
- Vapour barrier, shunts / bonding and installation details selected per project
- Wax-scraper or special shell-contact details added only where the service requires them
Inputs
Selection checks
- Floating-roof type and rim construction
- Measured rim-space distribution and expected movement
- Shell welds, protrusions, corrosion and out-of-roundness
- Stored product and material compatibility
- Available height and potential roof / seal interference
- Weather exposure, fire protection and inspection requirements
Standards & project basis
Designed from the application, then checked against the code.
EZseal configuration codes describe mechanical families, not pre-approved universal designs. Final selection and dimensions are project-specific and checked against the applicable tank, emissions and fire-safety basis.
Application review
Start with the tank, the service and the result you need.
Emission Zero can review the application before turning it into a product configuration or project specification.