Polyethylene piping systems shall be limited to vapor service not exceeding what pressure?

Polyethylene piping systems are specifically designed to handle certain pressures, and when it comes to vapor service, they have established limits to ensure safety and integrity of the system. The correct answer indicates that polyethylene piping systems should be limited to vapor service not exceeding 30 psig.

This limitation is in place due to the physical properties of polyethylene, which can become less effective at higher pressures, potentially leading to failure or leaks. In vapor applications, maintaining this pressure threshold is critical to prevent hazardous situations, as even small leaks can result in significant risks in terms of flammability and exposure.

The factors that play into these limitations include the material's strength, the potential for stress cracking, and the environmental conditions that could affect the integrity of the piping. By adhering to a maximum of 30 psig, manufacturers and operators can ensure a safer operation while preventing catastrophic failure of the piping system.