Editorial Technical Reference

Access Door Shield

This page explains how Access Door Shield is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A specialized shielding component designed for access doors in radiation containment structures.

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Access Door Shield in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Access Door Shield

Definition
The Access Door Shield is a critical component of Radiation Shielding Structures, specifically engineered to provide effective radiation attenuation at access points while maintaining necessary functionality for entry and exit. It integrates with the main shielding structure to ensure continuity of protection, preventing radiation leakage through door openings in facilities such as nuclear plants, medical radiation therapy rooms, and industrial radiography installations. The shield is constructed from high-density materials, including lead, tungsten alloy, steel, and boron-doped polyethylene, arranged in overlapping or interlocking configurations to create a robust radiation barrier. When the access door is closed, the shield forms a continuous protective layer with the surrounding structure, blocking or significantly reducing the transmission of ionizing radiation through the doorway. The component is available in custom sizes ranging from 600 to 2000 mm nominal size, with design pressures from 1.0 to 1.6 MPa per and design temperatures from -20 to 200 °C. Leakage rate is class B per ISO 15848-1, with a maximum of 1×10⁻⁶ Pa·m³/s. Radiation shielding thickness ranges from 50 to 200 mm lead or concrete equivalent. Surface finish for sealing surfaces is Ra 0.8–1.6 μm per ISO 1302. Operating pressure is 0.8–1.4 MPa, and operating temperature is -10 to 150 °C. Sealing materials include EPDM or FKM per ASTM D2000, and body materials are SS304 or SS316 per ASTM A240. Weight ranges from 150 to 800 kg depending on size and shielding thickness. Ingress protection is IP54 to IP65 per IEC 60529. All values are reference ranges and must be verified with the manufacturer for specific models and applications.
Working Principle
The Access Door Shield operates by utilizing high-density materials such as lead, tungsten alloy, steel, and boron-doped polyethylene, arranged in overlapping or interlocking configurations. These materials absorb and scatter ionizing radiation, reducing its intensity. When the door is closed, the shield aligns with the surrounding shielding structure, creating a continuous barrier that prevents radiation leakage through the doorway. The effectiveness depends on the material's density and thickness, as well as the integrity of the seals and joints. The design ensures that the shield maintains its protective function while allowing for necessary entry and exit operations.
Common Materials
Lead, Tungsten alloy, Steel, Boron-doped polyethylene
Technical Parameters
ParameterTypical rangeNotes & selection driver
Nominal Size600–2000 mmCustom sizes available on request
Design Pressure1.0–1.6 MPa
Design Temperature-20–200 °CHigher temperatures require special seals
Leakage Rate≤1×10⁻⁶ Pa·m³/sClass B per ISO 15848-1ISO 15848-1
Radiation Shielding Thickness50–200 mmLead or concrete equivalent
Surface FinishRa 0.8–1.6 μmFor sealing surfacesISO 1302
Operating Pressure0.8–1.4 MPaWithin design pressure range
Operating Temperature-10–150 °CContinuous operation
Sealing MaterialEPDM/FKMFKM for higher temperaturesASTM D2000
Body MaterialSS304/SS316316 for corrosive environmentsASTM A240
Weight150–800 kgDepends on size and shielding thickness
Ingress ProtectionIP54–IP65IP65 for outdoor installationIEC 60529

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
  • Shielding Panel Part
    Primary radiation attenuation element
    Material: Lead or tungsten composite
  • Sealing Mechanism
    Ensures radiation-tight closure between door and frame
    Material: Neoprene or specialized polymer
  • Hinge System
    Allows door movement while maintaining shielding integrity
    Material: Stainless steel
  • Interlock System
    Prevents door opening when radiation source is active
    Material: Steel and electronic components

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 15 psi differential
temperature: -40°C to +150°C
seal integrity: Maintained under cyclic door operation
radiation shielding: Up to 10^6 rads total dose
Media Compatibility
✓ Lead-based shielding composites ✓ Stainless steel containment structures ✓ Deionized water cooling systems
Unsuitable: High-velocity particulate abrasion environments
Sizing Data Required
  • Door opening dimensions (width x height)
  • Required radiation attenuation level (e.g., half-value layers)
  • Mounting interface specifications (flange type, bolt pattern)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion and pitting
Cause: Exposure to moisture, chemicals, or salt-laden environments leading to material degradation and loss of structural integrity.
Fatigue cracking at hinge or latch points
Cause: Repeated cyclic loading from frequent opening/closing, vibration, or thermal expansion/contraction stresses.
Maintenance Indicators
  • Visible deformation, warping, or misalignment preventing proper closure
  • Unusual grinding, scraping, or rattling noises during operation indicating loose or worn components
Engineering Tips
  • Implement regular corrosion protection measures including proper coating maintenance, cathodic protection if applicable, and environmental sealing at joints.
  • Establish preventive maintenance schedule for hinge/latch lubrication, fastener torque checks, and alignment verification to reduce stress concentrations.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 14122-3:2016 - Safety of machinery - Permanent means of access to machinery - Stairs, stepladders and guard-rails ANSI/UL 325 - Standard for Door, Drapery, Gate, Louver, and Window Operators and Systems DIN 18040-1:2010-10 - Construction of accessible buildings - Design principles - Part 1: Publicly accessible buildings

Quoted from the published standard.

Manufacturing Precision
  • Door Panel Flatness: +/- 1.5mm per meter
  • Hinge Alignment Bore: +/- 0.5mm
Quality Inspection
  • Dimensional Verification Test
  • Load Bearing Capacity Test
Technical documentation
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Manufacturing capability
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Inspection readiness
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Manufacturers of Access Door Shield

Manufacturer profiles associated with Access Door Shield.

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Frequently Asked Questions

What materials are used in the Access Door Shield?

The Access Door Shield can be made from lead, tungsten alloy, steel, or boron-doped polyethylene, as listed in the directory. The specific material and configuration depend on the application and must be confirmed with the manufacturer.

What are the standard sizes and pressure ratings?

The nominal size ranges from 600 to 2000 mm, and the design pressure is 1.0 to 1.6 MPa. These are reference ranges; actual values must be verified for the specific model.

How is the leakage rate specified?

The leakage rate is class B per ISO 15848-1, with a maximum of 1×10⁻⁶ Pa·m³/s. This is a procurement reference and does not guarantee compliance; verification with the manufacturer is required.

What are the operating temperature limits?

The design temperature range is -20 to 200 °C, and the operating temperature range is -10 to 150 °C. Higher temperatures may require special seals, so consult the manufacturer for specific conditions.

Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Related equipment

Applied To / Applications

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

Radiation Shielding Structure
View system integration details

Industrial Ecosystem & Supply Chain Structure

Data Basis

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

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.

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 · Page last updated 12 October 2026

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