Structured Manufacturing Data (2026)

Holder/Flange Assembly

Based on aggregated insights from structured 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 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

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 Structure

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

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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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 basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Machinery and Equipment Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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