Beijing Subway Line 22

Technical Specifications:

Thermal Insulation:

• Heat insulation requirement for the front window of the driver's cab: K-value ≤ 4.8W/(m²·K)

• Heat insulation requirement for the side window of the driver's cab: K-value ≤ 5.4W/(m²·K)

Sound Insulation:

• Sound reduction (Rw) for the front window of the driver's cab: ≥39dB

• Sound reduction (Rw) for the side window of the driver's cab: ≥32dB

Optical Distortion:

• The front window of the driver's cab meets the requirements of clause 5.1.2 in TB/T 1451.

Secondary Image Deviation:

• The front window of the driver's cab meets the requirements of clause 5.1.1 in TB/T 1451.

Ultraviolet Transmission:

• Meets the requirements of clause 5.8 in TB/T 1451.

Insulation Resistance:

• The insulation resistance shall not be less than 50MΩ.

Dielectric Strength:

• Meets the requirements of clause 5.4.2 in TB/T 1451.

Impact Resistance:

• Meets the requirements of clause 5.2.1 in TB/T 1451.

Gravel Impact Resistance:

• Meets the requirements of clause 5.2.5 in TB/T 1451.

Splash Protection:

• Meets the requirements of clause 5.2.3 in TB/T 1451.