Forward Acting Burst Disc
Product Model: ZD-022 (Ultra-HP, Exotic Material)
Material: High-strength exotic alloys such as Inconel 718, MP35N, or Elgiloy.
Pressure Range: 100 barg to 1,000+ barg (10,000 to 100,000+ kPa).
Key Feature: Capable of containing extreme pressures while maintaining precise burst characteristics.
Design: Often features a thicker, contoured dome and specialized scoring for controlled opening at ultra-high stress levels.
Typical Use: Hyper-pressure research vessels, chemical synthesis (e.g., diamond production), deep-sea equipment testing, and specialized oil & gas downhole tools.
Overview
At the frontier of pressure technology, where systems operate in the range of hundreds or thousands of bar, ordinary safety devices are inadequate. This ultra-high pressure rupture disc is crafted from exotic, high-yield-strength alloys capable of withstanding enormous stresses. Its design is meticulously analyzed using finite element methods to ensure it ruptures in a controlled manner at the designated extreme pressure, providing a reliable fail-safe for experimental apparatus and specialized industrial processes where conventional pressure relief is not possible.
Features & Benefits
Extreme Pressure Containment: Manufactured from alloys with yield strengths exceeding 1,000 MPa, enabling reliable sealing at unimaginable pressures.
Precision at the Limit: Despite the extreme conditions, burst pressure tolerances are tightly controlled, often requiring 100% individual testing.
Custom Engineering: Each order is typically a custom project, with design tailored to the specific pressure, temperature, and media of the application.
Robust Holder Design: Holders are equally robust, often machined from high-strength steel forgings with special sealing interfaces.
How It Works
The fundamental tensile rupture physics remain, but material behavior is nonlinear at these stresses. The disc's geometry is optimized to induce plastic instability and rupture precisely at the calculated point. Opening may be assisted by advanced scoring techniques to ensure full opening and prevent fragmentation that could damage valuable downstream equipment.
Specifications (Descriptive)
Sizes are typically small due to the extreme forces involved: DN10, DN15, DN20, DN25. Burst pressures are specified to exact requirements, e.g., 250 barg, 500 barg, 750 barg. Common materials are Inconel 718 (precipitation hardened) or Cobalt-Nickel alloys like MP35N. Holder connections are often autoclave-style threaded or special high-pressure clamp designs rather than standard flanges. Delivery includes detailed stress analysis reports and individual burst test certificates.
Q&A
Q: What is the lead time and cost for such a disc?
A: Lead times are long (often 12-20 weeks) due to material sourcing, custom machining, and extensive testing. Cost is significantly higher than standard discs, reflecting the exotic materials and engineering involved.
Q: Can these discs be used in cyclic high-pressure service?
A: Fatigue life at these stress levels is extremely limited. They are generally intended for single-event protection or systems with very few pressure cycles. For cyclic ultra-high pressure, a different protection strategy may be required.
Q: How is the burst pressure verified?
A: Each disc is individually hydrostatically tested in a specialized ultra-high pressure test chamber to a proof pressure (e.g., 90% of burst) and often to destruction for batch sample validation. The test data is provided with the disc.
About ZD Safety
We tackle the most extreme engineering challenges. Our capability in ultra-high pressure safety devices supports advanced research and cutting-edge industrial processes, where failure is not an option and margins for error are zero.
