What is the maximum permissible pressure for acetylene in manifolds?

The maximum permissible pressure for acetylene in manifolds is an important safety standard within the welding and gas industry. The correct answer, which states that the pressure is 30 psi, is based on the recognized safety guidelines established for handling acetylene.

Acetylene is a flammable gas that becomes unstable when subjected to pressures exceeding 15 psi in its pure form. However, when in a controlled environment such as a manifold system, which typically serves multiple gas cylinders, the safety threshold is adjusted to 30 psi. This limit is established as a safeguard against the risk of explosion or other dangerous incidents, ensuring that the gas is managed in a way that maintains its integrity and safety.

A manifold system distributes acetylene from multiple cylinders and must adhere to strict protocols to avoid pressure buildup that could lead to a hazardous situation. Knowing and adhering to this pressure limit is crucial for anyone working with acetylene, emphasizing the importance of safety regulations in this field. Thus, being trained on these limits is essential for workplace and environmental safety when dealing with flammable gases.