GB/T 14194-2017 in English

GB/T 14194—2017 Standard Revision Background and Significance

GB/T 14194—2017 "Compressed Gas Cylinder Filling Regulations" is an important revision that replaces the original standard GB/T14194—2006. This revision is based on the needs of industry development and technological progress, and has made many improvements and improvements to the original standard:

• Expanded the scope of application
• Added vacuum requirements for flammable gas and strong oxidizing gas cylinders
• Optimized the filling pressure calculation method
• Improved the safety operation specifications for cryogenic liquefied gases

These improvements are aimed at further improving the safety of the cylinder filling process and ensuring the safety of compressed gases in storage and transportation.

Interpretation of key provisions of the standard

4.4 Requirements for vacuuming of flammable and oxidizing gases

Gas cylinders must be vacuumed before filling with flammable gases or strong oxidizing gases. Specific requirements are as follows:

• Flammable gas cylinders must be vacuumed to below -80 kPa
• Oxidizing gas cylinders must be vacuumed to below -50 kPa

This provision is intended to prevent residual gas from causing explosions or oxidation reactions.

5.6 Filling pressure limits for special gases

For special gases such as fluorine (F₂) and nitric oxide (NO), the standard stipulates strict upper limits for filling pressures:

• Fluorine gas cylinders: the maximum filling pressure shall not exceed 3.0 MPa
• Nitric oxide gas cylinders: the maximum filling pressure shall not exceed 5.0 MPa

These restrictions are based on the physical and chemical properties of the gases to ensure safety and stability.

Analysis of Standard Technology Evolution