Compression couplings can only be installed at which locations?

Compression couplings are designed for specific applications within a gas piping system, and their installation must adhere to safety standards and regulations. Correctly installed compression couplings should be positioned after the service head valve and service regulator to ensure that they are located in a controlled environment where pressure regulation has already been completed.

By placing compression couplings in this location, it mitigates potential risks associated with high-pressure gas that could escape if the coupling were to malfunction. Additionally, these couplings are often employed in areas where flexibility in the piping is required, allowing for adjustments or repairs without needing to replace entire sections of pipe.

The other locations mentioned would not conform to safety or regulatory requirements for the use of compression couplings. Therefore, following the guideline that they are installed after the service head valve and service regulator establishes a clear boundary for safe operation within the gas piping infrastructure.