Who shall provide documentation certifying the performance and successful completion of all pressure testing for a manufactured assembly?

The correct choice is the manufacturer, as they are typically responsible for providing documentation certifying the performance and successful completion of all pressure testing for a manufactured assembly. This is crucial for ensuring that the assembly meets safety and quality standards set forth by regulatory bodies.

The manufacturer conducts the necessary tests during the production process and creates the documentation to verify that the assembly can withstand approved pressure thresholds. This certification is essential for maintaining compliance with industry regulations and assures end-users that the system has been adequately tested and is safe for operation. In addition to meeting safety regulations, this documentation also helps in liability issues and future maintenance.

While the engineer may design the assembly and the installer may facilitate its installation, those roles do not typically include the responsibility for pressure testing documentation. The owner, although a key stakeholder, usually does not have expertise in testing and certifying the assembly’s performance. Thus, the responsibility lies primarily with the manufacturer to ensure thorough testing and provide the necessary certification.