What are the standard requirements for choosing and installing lead glass?

1. Key Specs for Choosing Lead Glass

Lead Equivalent Requirements:

ZF2/ZF3: Light transmittance ≥80%, good for normal X-ray rooms

ZF6/ZF7: Lead equivalent ≥5.0mmPb, for nuclear facilities or high-energy gamma ray protection

Medical Scenes: Main protection areas (like CT rooms) ≥2.5mmPb, secondary areas (like control rooms) ≥1.0mmPb

Industrial Scenes: Pick based on radiation energy (for example, 2.0mmPb needed at 150kVp)

Grade Selection:

Physical Properties:

Density: ≥4.2g/cm³ (ZF3 type)

Light Transmittance: ≥80% at 550nm wavelength, dispersion coefficient ≤50

Impact Resistance: Pass 1.2m steel ball drop test (no breakage)

Size Specs:

Standard Thickness: 10mm, 15mm, 18mm, 20mm (±0.5mm tolerance)

Max Size: 2000mm×1200mm (custom processing required)

2. Preparation Before Installation

Environmental Requirements

Temperature: 15-30°C, Humidity ≤ 60% (to avoid acid corrosion)

Foundation Conditions: Wall flatness error ≤ 2mm/m, spacing between embedded parts ≤ 600mm

Material Inspection

Lead Equivalence Verification: Measured using a γ-ray detector, error ±5%

Appearance Check: Surface should be free of bubbles and scratches, edges polished smooth (roughness Ra ≤ 3.2μm)

Tool Setup

Suction cup (load capacity ≥ 50kg), cutting machine (accuracy ±0.1mm), edge grinder (chamfer R ≥ 1mm)

3. Installation Specifications

Fixing Method

Frame Installation:

304 stainless steel frame (thickness ≥2mm), fixed with expansion bolts (M8×100mm, spacing ≤500mm)

Embedded Installation:

Fill the gap between the glass and wall with lead rubber strips (thickness ≥5mm), overlap width ≥50mm

Sealing

Joint Sealing:

EPDM rubber sealant (thickness ≥8mm), filling depth ≥3mm

Edge Protection:

Wrap all around with 1.0mm thick lead plates, fitting snugly with the frame

Seismic Design:

For high-rise buildings, use flexible connections (rubber shock pads), leaving a 5-10mm expansion gap between the frame and wall

4.Maintenance and Lifespan Management

Daily Maintenance:

Check the integrity of sealant strips every month (replace if aging cracks are ≥1mm deep).

Randomly inspect with a lead equivalence detector every quarter (replace immediately if error exceeds ±5%).

Lifespan Assessment:

Routine scenarios: Service life ≥10 years (lead equivalence decay rate ≤5% per year).

High-radiation scenarios: Nuclear medicine departments need to test every 5 years; replace if decay rate exceeds 10%.

Disposal:

Package according to radioactive waste standards (wrap lead glass with lead sheets and label with activity and half-life).