Rupture Disc Dome Component | Chemical Manufacturing

Product Specifications

Technical details and manufacturing context for Dome

Definition

The dome is the primary pressure-bearing component of a rupture disc assembly, typically a thin, curved membrane designed to bulge outward under increasing pressure until reaching its predetermined burst point, at which it fails catastrophically to relieve overpressure in the system. In chemical manufacturing, the dome is critical for protecting vessels and piping from overpressure events. It is available in materials such as stainless steel, nickel alloy, graphite, and tantalum, each selected based on process compatibility and corrosion resistance. The dome's performance is defined by parameters including nominal diameter (25–600 mm per ISO 4126-2), burst pressure (0.1–100 MPa at 22°C with ±5% tolerance), operating temperature (-40 to 200°C, with high-temperature materials required above 200°C), and thickness (0.1–2.0 mm). Surface roughness ranges from 0.8 to 1.6 μm Ra, and weight varies from 0.05 to 15 kg depending on size and material. Leak tightness is helium leak tested to 1×10^-6 mbar·L/s. Certification to PED 2014/68/EU is available, and other certifications may be offered. The dome is designed to meet ISO 4126-2 and ASTM A240 (for 316L material) standards. When selecting a dome, verify the burst pressure, temperature range, and material compatibility with your process media. Confirm the exact dimensions, tolerances, and certifications with the legal manufacturer or supplier, as these values are reference ranges and may vary for specific models. Proper installation and maintenance are essential to ensure reliable rupture disc performance.

Working Principle

The dome functions as a pressure-sensitive membrane. Under normal operating conditions, it maintains system integrity. When pressure exceeds the disc's rated burst pressure, the dome undergoes plastic deformation (bulging), eventually reaching its mechanical limit and rupturing, creating an opening for rapid pressure relief. The dome's curvature and material properties determine its burst point. It is designed to fail catastrophically, providing a full-bore opening for pressure release. The dome is not reusable after rupture and must be replaced. Regular inspection is needed to detect signs of fatigue or corrosion that could affect burst pressure.

Common Materials

Stainless Steel, Nickel Alloy, Graphite, Tantalum

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	25–600 mm	Standard sizes per ISO; custom sizes available.ISO 4126-2
Burst Pressure	0.1–100 MPa	Set point at 22°C; tolerance per standard.ISO 4126-2
Burst Pressure Tolerance	±5 %	Tighter tolerance available on request.ISO 4126-2
Operating Temperature	-40–200 °C	Above 200°C requires high-temp material.
Material	316L	Other alloys available: Hastelloy, Inconel.ASTM A240
Surface Roughness	0.8–1.6 μm Ra	Smoother finish for hygienic applications.ISO 4287
Thickness	0.1–2.0 mm	Determines burst pressure; varies with size.
Weight	0.05–15 kg	Depends on size and material.
Leak Tightness	1×10^-6 mbar·L/s	Helium leak tested.ISO 4126-2
Certification	CE/PED	Other certifications available.PED 2014/68/EU

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

Components / BOM

Dome Crown Part
Central highest point of the dome where initial rupture typically occurs

Material: Matches main dome material
Dome Flange Part
Peripheral area where dome is clamped or sealed to the rupture disc holder

Material: Matches main dome material

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Rupture Disc (if applicable)

View system integration details

Manufacturers of Dome

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Frequently Asked Questions

What materials are available for the dome?

The dome is available in stainless steel, nickel alloy, graphite, and tantalum. The material choice depends on the process media and corrosion requirements. Confirm the specific material grade with the supplier.

What is the burst pressure range?

The burst pressure range is 0.1 to 100 MPa at 22°C, with a tolerance of ±5% per ISO 4126-2. The exact burst pressure must be specified for your application and verified with the manufacturer.

What is the operating temperature range?

The standard operating temperature range is -40°C to 200°C. For temperatures above 200°C, a high-temperature material must be selected. Always verify the temperature limits with the supplier.

What standards apply to the dome?

The dome is referenced to ISO 4126-2 for dimensions, burst pressure, and leak tightness. Material 316L is per ASTM A240. Certification to PED 2014/68/EU is available. Verify compliance with the manufacturer.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 95% of burst pressure rating
other spec:	Flow rate: Dependent on orifice size; Slurry concentration: Limited to non-abrasive slurries (<5% solids)
temperature:	-40°C to 400°C (dependent on material)

Dome

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