Forward Domed Rupture Disc
Product Model: ZD-011 (Marine Grade)
Material: 316L Stainless Steel holders with optional Monel or Titanium membranes.
Certifications: ABS, DNV-GL, Lloyd’s Register type approval.
Special Feature: Corrosion-resistant design for saltwater atmospheres. Optional protective coatings.
Pressure Range: 1 barg to 25 barg, suitable for marine vessel systems.
Typical Use: Protection of cargo tanks, fuel oil systems, boiler vents, and LNG carrier piping.
Overview
The marine environment presents unique challenges of constant salt spray, humidity, and vibration. Our marine-grade forward-acting rupture disc is engineered specifically for this duty. Constructed from enhanced corrosion-resistant materials and designed to meet major classification society standards, it provides dependable overpressure protection for critical shipboard systems. Its robust design ensures long service life and reliability even in the demanding conditions encountered at sea.
Features & Benefits
Classification Society Approved: Manufactured and tested to secure approvals from leading marine regulatory bodies (ABS, DNV, etc.), facilitating vessel certification.
Enhanced Corrosion Resistance: Material selections and optional epoxy or zinc coatings protect against salt-induced corrosion on both process and atmospheric sides.
Vibration & Shock Resistant: Design considerations ensure the disc remains secure and functional despite vessel motion and engine vibrations.
Global Service Support: Available through a network of marine equipment suppliers worldwide for easy replacement during port calls.
How It Works
This disc operates on the standard forward-acting (tensile) principle, ideal for the steady pressure regimes common in marine systems. Its dome ruptures cleanly along pre-defined score lines when the system pressure exceeds the rated burst value, providing immediate and full-bore relief to protect pumps, tanks, and heat exchangers.
Specifications (Descriptive)
Available in common marine pipeline sizes from DN25 to DN150. Typical burst pressures align with marine system designs: for example, DN50 units often cover 4 to 10 barg, while DN100 units may handle 2 to 6 barg. Standard holder finish is hot-dip galvanized or coated carbon steel for maximum atmospheric corrosion resistance. Wetted parts are typically 316L stainless steel. Documentation packages include the required Mill Certificate and Classification Society conformity statements.
Q&A
Q: Why is a special “marine grade” rupture disc needed?
A: Standard industrial discs may corrode rapidly in salty, humid marine air, leading to premature failure or leakage. Marine-grade discs use specific materials, coatings, and construction to withstand this environment and meet strict maritime safety codes.
Q: Can these be installed in flammable service on vessels?
A: Yes. When specified for fuel oil, cargo tank, or other flammable service, the disc materials and design comply with the fire safety and zone requirements outlined in the classification rules for such applications.
Q: How does the approval process work?
A: The disc design is submitted to the classification society (e.g., ABS) for review and testing. Once approved, production can be stamped and certified, providing the necessary documentation for the shipyard or vessel owner.
About ZD Safety
We understand the critical nature of safety at sea. Our marine products are developed in consultation with classification societies to ensure they meet the rigorous demands of the global maritime industry, providing peace of mind for owners and operators.
