Industry-Verified Manufacturing Data (2026)

Flange Housing

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Flange Housing 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 Flange Housing is characterized by the integration of Flange Face and Bolt Holes. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel 316 construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A structural component that provides mounting and sealing interface for sight glass assemblies in industrial equipment.

Product Specifications

Technical details and manufacturing context for Flange Housing

Definition
The flange housing is a critical component of sight glass assemblies that serves as the mounting structure and sealing interface between the sight glass and the equipment vessel or pipeline. It provides a secure, leak-proof connection while allowing visual inspection of process fluids or materials.
Working Principle
The flange housing creates a sealed chamber that holds the sight glass in position against the equipment opening. It uses bolt holes or clamps to secure the assembly, with gaskets or seals between mating surfaces to prevent leakage. The housing maintains proper alignment and pressure resistance while allowing light transmission through the sight glass.
Common Materials
Stainless Steel 316, Carbon Steel, Alloy Steel
Technical Parameters
  • Flange diameter, bolt circle diameter, thickness, and bolt hole specifications (mm) Standard Spec
Components / BOM
  • Flange Face
    Provides sealing surface for gasket installation
    Material: Stainless Steel
  • Bolt Holes
    Allow secure fastening to mating flange
    Material: Same as housing material
  • Sight Glass Recess
    Holds and positions the sight glass element
    Material: Same as housing material
Engineering Reasoning
0-25 bar pressure differential, -40°C to 150°C temperature range, 0.05-0.15 mm flange deflection tolerance
28 bar pressure differential causing permanent flange deformation, 180°C thermal expansion exceeding bolt yield strength, 0.25 mm flange deflection causing seal extrusion
Design Rationale: Von Mises stress exceeding 250 MPa yield strength of ASTM A36 steel, differential thermal expansion exceeding 0.012 mm/°C coefficient mismatch, creep deformation at sustained temperatures above 120°C
Risk Mitigation (FMEA)
Trigger Bolt preload relaxation due to thermal cycling at 100+°C temperature differentials
Mode: Gasket compression loss leading to 0.1 mm flange separation and fluid leakage
Strategy: Torque-to-yield bolting with Belleville washers maintaining 70% minimum joint preload
Trigger Corrosive fluid pH below 4.0 attacking 316L stainless steel at 80°C
Mode: Pitting corrosion exceeding 0.5 mm depth causing through-wall failure in 2000 hours
Strategy: PTFE-lined flange with 3 mm corrosion allowance and cathodic protection at -0.85 V vs SCE

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Flange Housing.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 10 bar (150 psi)
other spec: Slurry concentration up to 40% solids by weight, Flow rate dependent on sight glass diameter
temperature: -40°C to 200°C
Media Compatibility
✓ Water-based fluids ✓ Petroleum-based oils ✓ Chemical process media (pH 4-10)
Unsuitable: Hydrofluoric acid or highly caustic environments (pH <2 or >12)
Sizing Data Required
  • Sight glass diameter and thickness
  • Flange bolt circle diameter and bolt size
  • Required sealing pressure and gasket type

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bolt fatigue and loosening
Cause: Cyclic thermal expansion/contraction or vibration leading to loss of preload, gasket compression, and eventual leakage or joint separation
Flange face corrosion or pitting
Cause: Exposure to corrosive fluids, moisture, or chemical attack, compromising the sealing surface and leading to leaks
Maintenance Indicators
  • Visible fluid seepage or drips around the flange joint
  • Abnormal noise (hissing, whistling) indicating gas or high-pressure fluid leakage
Engineering Tips
  • Implement a torque audit and re-torquing schedule using calibrated tools and proper bolt tightening sequences to maintain gasket compression
  • Apply protective coatings or use corrosion-resistant flange materials compatible with the service environment, and ensure proper gasket selection for chemical resistance

Compliance & Manufacturing Standards

Reference Standards
ISO 7005-1:2011 (Metallic flanges) ASME B16.5:2020 (Pipe flanges and flanged fittings) DIN EN 1092-1:2018 (Flanges and their joints)
Manufacturing Precision
  • Bore diameter: +/-0.05 mm
  • Flange face flatness: 0.1 mm per 300 mm diameter
Quality Inspection
  • Dye Penetrant Test (PT) for surface defects
  • Dimensional verification with CMM (Coordinate Measuring Machine)

Factories Producing Flange Housing

Verified manufacturers with capability to produce this product in China

✓ 92% Supplier Capability Match Found

T Technical Director from United States Jan 14, 2026
★★★★★
"The technical documentation for this Flange Housing is very thorough, especially regarding technical reliability."
Technical Specifications Verified
P Project Engineer from United Arab Emirates Jan 11, 2026
★★★★☆
"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Flange Housing so far. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Australia Jan 08, 2026
★★★★★
"Testing the Flange Housing now; the technical reliability results are within 1% of the laboratory datasheet."
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.”

9 sourcing managers are analyzing this specification now. Last inquiry for Flange Housing from Vietnam (1h ago).

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Frequently Asked Questions

What materials are available for the flange housing?

Our flange housing is available in Stainless Steel 316, Carbon Steel, and Alloy Steel to suit various industrial applications and environmental conditions.

How does the flange housing interface with sight glass assemblies?

The flange housing provides a precise mounting and sealing interface through its flange face, bolt holes, and sight glass recess, ensuring secure installation and leak prevention.

What industries commonly use this flange housing component?

This flange housing is designed for machinery and equipment manufacturing, particularly in industrial settings requiring reliable sight glass mounting in processing equipment, tanks, and monitoring systems.

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.

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