Disc Membrane: Size Range 1/2" to 48" diameter

Component Specifications

Definition

A disc membrane is the critical pressure-sensitive element within a rupture disc assembly, designed to fail at a specific burst pressure to provide instantaneous pressure relief in industrial systems. It functions as a non-reclosing safety device that protects vessels, pipelines, and equipment from catastrophic overpressure events by creating a full-bore opening when the system pressure exceeds the membrane's calibrated burst rating.

Working Principle

The disc membrane operates on the principle of controlled mechanical failure under pressure. When system pressure reaches the predetermined burst pressure, the membrane undergoes plastic deformation and tensile failure, creating an opening that allows rapid pressure release. The burst pressure is precisely calibrated through material selection, thickness, scoring patterns, and manufacturing processes to ensure reliable performance at the specified set point.

Materials

Stainless steel (304, 316, 321, 347), Inconel (600, 625), Monel, Hastelloy, Nickel, Titanium, Graphite, Tantalum, Platinum, Silver, Aluminum, with material selection based on corrosion resistance, temperature range, and burst pressure requirements.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Size Range	1/2" to 48" diameter
Response Time	Milliseconds
Leak Tightness	Bubble-tight to 10^-9 std cc/sec
Surface Finish	Ra 0.4 to 1.6 μm
Burst Tolerance	±2% to ±5% of rated burst pressure
Scoring Pattern	Cross, star, circular, or custom
Burst Pressure Range	0.1 psi to 100,000 psi
Operating Temperature Range	-268°C to +538°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 4126-2, ASME BPVC Section VIII, PED 2014/68/EU, AD 2000, DIN EN ISO 4126-2

Parent Products

This component is used in the following industrial products

Rupture Disc

A non-reclosing pressure relief device designed to burst at a predetermined pressure to protect equipment from overpressure.

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Engineering Analysis

Risks & Mitigation

Premature burst due to corrosion or fatigue
Failure to burst at set pressure
Fragmentation causing downstream contamination
Incorrect installation affecting performance
Temperature extremes altering burst characteristics

FMEA Triads

Trigger: Material corrosion from process media
Failure: Premature burst or failure to burst
Mitigation: Select corrosion-resistant materials, apply protective coatings, implement regular inspection protocols

Trigger: Fatigue from pressure cycling
Failure: Premature burst below set pressure
Mitigation: Use reverse-acting designs for pulsating pressure, install pulsation dampeners, limit pressure cycling frequency

Trigger: Installation errors or damage
Failure: Leakage or incorrect burst pressure
Mitigation: Follow manufacturer installation guidelines, use proper torque specifications, implement installation verification procedures

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Burst pressure tolerance typically ±2% to ±5% as per ASME and ISO standards, with tighter tolerances available for critical applications

Test Method

Hydrostatic or pneumatic burst testing per ASME BPVC Section VIII Div 1 UG-127, ISO 4126-2, with certified test reports including actual burst pressure, temperature, and media

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Disc Membrane

Manufacturer profiles associated with Disc Membrane.

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Frequently Asked Questions

What is the difference between forward-acting and reverse-acting disc membranes?

Forward-acting membranes burst under pressure applied to the concave side, while reverse-acting membranes burst under pressure applied to the convex side, offering different performance characteristics for specific applications.

How often should disc membranes be replaced?

Disc membranes should be replaced after each burst event as they are non-reclosing devices. Regular inspection intervals (typically 6-12 months) are recommended to check for corrosion, fatigue, or damage that could affect performance.

Can disc membranes be used with corrosive media?

Yes, by selecting appropriate corrosion-resistant materials like Hastelloy, Tantalum, or PTFE-coated metals based on the specific chemical compatibility requirements of the application.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Disc Membrane