Holder/Flange: Size Range DN15 to DN600

Component Specifications

Definition

A Holder/Flange is a precision-engineered mechanical component designed to securely mount and seal a rupture disc within a pressure relief system. It consists of mating flanges that clamp the rupture disc in place, providing a leak-tight seal while allowing the disc to burst at its designated pressure rating. The component typically includes inlet and outlet flanges, gaskets, and bolting assemblies to maintain structural integrity under varying pressure and temperature conditions.

Working Principle

The Holder/Flange operates by creating a sealed assembly where the rupture disc is clamped between two flanges using bolts. This assembly maintains pressure integrity until the disc's burst pressure is exceeded, at which point the disc fractures to relieve pressure. The flanges distribute clamping forces evenly to prevent leakage and ensure the disc responds accurately to pressure changes.

Materials

Common materials include carbon steel (ASTM A105), stainless steel (ASTM A182 F304/F316), alloy steel, or nickel alloys for corrosive environments. Gaskets are typically graphite, PTFE, or spiral-wound metal.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Face Type	RF, FF, RTJ
Size Range	DN15 to DN600
Bolt Pattern	ASME B16.5
Pressure Rating	Up to 10,000 psi
Temperature Range	-50°C to 400°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 4126-1, ASME BPVC Section VIII, DIN 3320, API 520

Parent Products

This component is used in the following industrial products

Rupture Disc (if applicable)

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

View Product Details

Engineering Analysis

Risks & Mitigation

Improper installation causing leakage
Material incompatibility with process media
Over-torquing bolts damaging flanges

FMEA Triads

Trigger: Corrosion from aggressive media
Failure: Flange degradation leading to leaks
Mitigation: Use corrosion-resistant materials and protective coatings

Trigger: Incorrect bolt torque
Failure: Uneven sealing causing premature disc failure
Mitigation: Follow manufacturer torque specifications and use calibrated tools

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per ASME B16.5, surface finish Ra ≤ 3.2 μm for sealing surfaces

Test Method

Hydrostatic/pneumatic testing per ASME BPVC, helium leak testing for critical applications

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

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

Manufacturers of Holder/Flange

Manufacturer profiles associated with Holder/Flange.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the purpose of a Holder/Flange in rupture disc systems?

It provides secure mounting and sealing for the rupture disc, ensuring proper pressure containment and accurate burst performance.

Can Holders/Flares be reused after a rupture disc bursts?

Yes, if undamaged. The holder is typically reusable after replacing the ruptured disc and inspecting for wear or deformation.

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.

Holder/Flange