What identification must each length of pipe and fitting used in a mechanical system bear?

Each length of pipe and fitting used in a mechanical system must bear identification from the manufacturer. This identification is crucial for several reasons. First, it serves to trace the product back to the manufacturer for quality control and accountability. In the event of a failure or issue with the material, knowing the manufacturer allows inspectors and maintenance personnel to address any potential defects or safety concerns.

Additionally, this identification can help confirm that the materials used comply with relevant codes and standards, as certain manufacturers are known for adhering to specific, industry-recognized standards. It also assists in ensuring that replacement parts can be easily sourced, maintaining the integrity and compatibility of the system.

While compliance marks, warranties, and installation instructions are important aspects, the identity of the manufacturer is fundamental for establishing the origin and reliability of the piping and fittings used in mechanical systems.