When can you load cylinders of compressed gas in a horizontal position (lying down)?

If the relief valve is in the vapor space. Section 9.4 (Class 2): Cylinders may be loaded in a horizontal position if it is designed so the

When can you load cylinders of compressed gas in a horizontal position (lying down)?

ANSWER BREAKDOWN
  • A. Incorrect. "Whenever they are too tall to stand up" is not correct. Section 9.4 (Class 2): Cylinders may be loaded in a horizontal position if it is designed so the relief valve is in the vapor space.
  • B. Correct. Section 9.4 (Class 2): Cylinders may be loaded in a horizontal position if it is designed so the relief valve is in the vapor space.
  • C. Incorrect. "Never, they must always be upright" is not correct. Section 9.4 (Class 2): Cylinders may be loaded in a horizontal position if it is designed so the relief valve is in the vapor space.
  • D. Incorrect. "If you stack them no more than 2 high" is not correct. Section 9.4 (Class 2): Cylinders may be loaded in a horizontal position if it is designed so the relief valve is in the vapor space.