Holder/Flange Assembly for Rupture Disc Systems

Product Specifications

Technical details and manufacturing context for Holder/Flange Assembly

Definition

The Holder/Flange Assembly is a critical component of a rupture disc system that provides the structural interface between the rupture disc and the pressure vessel or piping. It consists of a holder that clamps the rupture disc in place and a flange that allows for bolted connection to the system, ensuring proper alignment, sealing, and pressure containment until the disc ruptures at its set pressure. The assembly is available in carbon steel or stainless steel, with material grades such as SS304/SS316L for corrosion resistance. It is designed for nominal diameters from DN15 to DN600, operating pressures from 1.0 to 1.6 MPa, and temperatures from -40°C to 85°C, depending on seal material. The flange rating ranges from PN16 to PN40, and the assembly weight varies from 2 to 50 kg. Key parameters include seat flatness of 0.05 mm, surface roughness of Ra 0.8–1.6 µm, and bolt torque of 50–200 N·m. Seal types include O-ring or flat. These values are directory reference ranges and must be confirmed for the specific model and application. The assembly complies with standards such as ISO 7005 for flanges, ISO 1302 for surface texture, ISO 898 for bolt properties, and ASTM A240 for stainless steel plates. Always verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The assembly mechanically clamps the rupture disc between its holder and flange surfaces using bolts. This creates a pressure-tight seal. The design ensures the disc is held securely without distorting it, allowing it to burst predictably at its rated pressure. The flange facilitates standard connection to adjacent piping. The holder and flange are machined to precise flatness and surface roughness to ensure even gasket seating and leak-tightness. Bolt torque is applied within the specified range to achieve the required clamping force without over-stressing the disc. The assembly operates within the pressure and temperature limits defined by the seal material and flange rating. If the disc ruptures, the assembly contains the pressure release and directs the flow. Regular inspection of the seal and bolt torque is necessary to maintain performance.

Common Materials

Carbon Steel, Stainless Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	DN15–DN600 mm	Matches rupture disc sizeISO 7005
Operating Pressure	1.0–1.6 MPa	Below 1.0 MPa seat load insufficientISO 5208
Operating Temperature	-40–85 °C	Seal material limits range
Seat Flatness	0.05 mm	Ensures leak-tight sealISO 5208
Surface Roughness	Ra 0.8–1.6 µm	Critical for gasket seatingISO 1302
Bolt Torque	50–200 N·m	Per bolt size and classISO 898
Material Grade	SS304/SS316L	Corrosion resistanceASTM A240
Weight	2–50 kg	Depends on size and rating
Flange Rating	PN16–PN40 bar	Matches system pressureISO 7005
Seal Type	O-ring/Flat	O-ring for low torque

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

Top Flange Part
Upper clamping surface; connects to inlet piping.

Material: Carbon Steel or Stainless Steel
Bottom Flange Part
Lower clamping surface; connects to outlet piping or vessel.

Material: Carbon Steel or Stainless Steel
Holder Ring Part
Central ring that positions and clamps the rupture disc.

Material: Carbon Steel or Stainless Steel
Stud Bolts Part
Fasteners that apply clamping force to seal the assembly.

Material: Alloy Steel
Gaskets Part
Provide sealing between flanges and the rupture disc.

Material: Graphite, PTFE, or Metal

Applied To / Applications

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

Rupture Disc

View system integration details

Manufacturers of Holder/Flange Assembly

Manufacturer profiles associated with Holder/Flange Assembly.

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Frequently Asked Questions

What is the function of a Holder/Flange Assembly?

It holds and seals a rupture disc in a pressure system, providing a bolted connection to piping or vessels. It ensures the disc is clamped securely without distortion, allowing it to burst at its set pressure.

What materials are available for this assembly?

The assembly is available in carbon steel or stainless steel, with material grades such as SS304/SS316L for corrosion resistance. The specific grade should be confirmed based on the application.

What are the typical size and pressure ranges?

Nominal diameters range from DN15 to DN600, and flange ratings from PN16 to PN40. Operating pressure is typically 1.0 to 1.6 MPa. These are reference ranges; verify for the specific model.

How should I verify the assembly's specifications?

Always check the model-specific values for dimensions, pressure, temperature, and materials with the legal manufacturer or supplier. Standards like ISO 7005 are references for procurement and verification.

Data Basis

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

Preliminary Technical Classification

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pressure:	Up to 10,000 psi (689 bar)
other spec:	Slurry concentration: ≤40% solids by weight, Flow rate: Dependent on flange size and system design
temperature:	-20°C to 400°C

Holder/Flange Assembly

Product Specifications

Applied To / Applications

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