Industry-Verified Manufacturing Data (2026)

Holder/Flange Assembly

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Holder/Flange Assembly used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Holder/Flange Assembly is characterized by the integration of Top Flange and Bottom Flange. In industrial production environments, manufacturers listed on CNFX commonly emphasize Carbon Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A mechanical assembly that secures and seals a rupture disc within a pressure system.

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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.
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.
Common Materials
Carbon Steel, Stainless Steel
Technical Parameters
  • Nominal bore size (NPS/DN) of the flange connection. (mm) Per Request
Components / BOM
  • Top Flange
    Upper clamping surface; connects to inlet piping.
    Material: Carbon Steel or Stainless Steel
  • Bottom Flange
    Lower clamping surface; connects to outlet piping or vessel.
    Material: Carbon Steel or Stainless Steel
  • Holder Ring
    Central ring that positions and clamps the rupture disc.
    Material: Carbon Steel or Stainless Steel
  • Stud Bolts
    Fasteners that apply clamping force to seal the assembly.
    Material: Alloy Steel
  • Gaskets
    Provide sealing between flanges and the rupture disc.
    Material: Graphite, PTFE, or Metal
Engineering Reasoning
0-150 bar at 20-150°C
Exceeds 180 bar burst pressure or 200°C thermal limit
Design Rationale: Yield strength of ASTM A182 F316L flange material (205 MPa) exceeded, causing plastic deformation and seal failure
Risk Mitigation (FMEA)
Trigger Cyclic pressure fluctuation above 100 bar at 5 Hz frequency
Mode: High-cycle fatigue crack initiation at flange-to-holder weld interface
Strategy: Implement ASME BPVC Section VIII Division 2 fatigue analysis with 10^6 cycle design life
Trigger Corrosive process fluid with chloride concentration >25 ppm at 80°C
Mode: Stress corrosion cracking in 316L stainless steel flange material
Strategy: Apply duplex stainless steel UNS S31803 material with PREN >40 for chloride resistance

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Holder/Flange Assembly.

carbon steel holder flange assembly stainless steel rupture disc holder pressure system flange assembly mechanical flange holder for machinery rupture disc sealing flange assembly

Applied To / Applications

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

Rupture Disc
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
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
Media Compatibility
✓ Natural gas pipelines ✓ Chemical processing fluids ✓ High-purity water systems
Unsuitable: Hydrofluoric acid environments
Sizing Data Required
  • Maximum operating pressure (MOP)
  • Flange size and rating (e.g., ANSI 150, 300)
  • Rupture disc diameter and type

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bolt fatigue and loosening
Cause: Cyclic loading from vibration or thermal expansion causing stress concentration at bolt threads, leading to crack initiation and propagation
Gasket compression failure
Cause: Inadequate bolt torque during installation or relaxation over time, resulting in insufficient sealing pressure and fluid leakage
Maintenance Indicators
  • Visible fluid leakage or weeping at flange interface
  • Audible hissing or whistling indicating pressure loss through compromised seal
Engineering Tips
  • Implement controlled bolt tightening sequence using calibrated torque wrenches to ensure uniform gasket compression
  • Establish regular torque verification schedule and thermal cycle monitoring to detect bolt relaxation before failure occurs

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ANSI B16.5 - Pipe Flanges and Flanged Fittings DIN 2501 - Flanges; General
Manufacturing Precision
  • Bore Diameter: +/-0.025mm
  • Flange Flatness: 0.05mm per 100mm diameter
Quality Inspection
  • Dimensional Verification with CMM
  • Magnetic Particle Inspection for Surface Defects

Factories Producing Holder/Flange Assembly

Verified manufacturers with capability to produce this product in China

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✓ 92% Supplier Capability Match Found

P Procurement Specialist from United States Feb 12, 2026
★★★★★
"Found 57+ suppliers for Holder/Flange Assembly on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
T Technical Director from United Arab Emirates Feb 09, 2026
★★★★★
"The technical documentation for this Holder/Flange Assembly is very thorough, especially regarding technical reliability."
Technical Specifications Verified
P Project Engineer from Australia Feb 06, 2026
★★★★★
"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Holder/Flange Assembly so far."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

10 sourcing managers are analyzing this specification now. Last inquiry for Holder/Flange Assembly from Turkey (1h ago).

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Frequently Asked Questions

What materials are available for the Holder/Flange Assembly?

Our Holder/Flange Assemblies are manufactured in both Carbon Steel and Stainless Steel to suit different pressure system requirements and environmental conditions.

What components are included in the Holder/Flange Assembly BOM?

The assembly includes Top Flange, Bottom Flange, Holder Ring, Stud Bolts, and Gaskets - all designed to work together for secure rupture disc installation and sealing.

How does the Holder/Flange Assembly improve pressure system safety?

The assembly provides a secure, leak-proof mounting for rupture discs, ensuring proper activation during overpressure events while maintaining system integrity under normal operating conditions.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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