How often should supports for hanging gas piping be installed?

The correct choice specifies that supports for hanging gas piping should be installed at approved intervals, which aligns with safety standards and regulations in the gas industry. This ensures that the gas piping is adequately supported to prevent sagging, damage, or potential leaks, which could lead to hazardous situations.

Installing supports at approved intervals is essential for maintaining the integrity of the piping system, as it helps distribute the weight of the pipes evenly and prevents undue stress on joints and fittings. Regulations typically provide guidelines on the maximum distance between supports based on the type and size of the piping, ensuring that installations are safe and compliant with industry standards.

In contrast, selecting random placements lacks the systematic approach necessary for safety and reliability, while annual installation doesn't address the ongoing need based on physical conditions or usage. A reliance on support only when deemed necessary could lead to unsafe situations if those assessments are not thorough or if circumstances change unexpectedly. Therefore, adhering to established intervals is crucial for the safe operation and longevity of gas piping systems.