On-stream welding requires approval from which stakeholder?

On-stream welding requires approval from which stakeholder?

• A. The owner/user.
• B. The inspector.
• C. The piping engineer.
• D. The contractor.

Answer: (A)

On-stream welding is performed while the piping system is in operation, so it carries significant safety and integrity risks. The party accountable for the facility—the owner/user—must approve and authorize this work, and sign off on the permit-to-work and the pre-welding controls (isolation, depressurization, ensuring a safe, gas-free environment, and other safety measures). This ensures the operation’s risk is accepted at the highest level responsible for the process and equipment. The inspector checks that procedures and quality requirements are met, the piping engineer provides the welding procedures and design criteria, and the contractor performs the welding, but the actual approval to proceed rests with the owner/user.

On-stream welding is performed while the piping system is in operation, so it carries significant safety and integrity risks. The party accountable for the facility—the owner/user—must approve and authorize this work, and sign off on the permit-to-work and the pre-welding controls (isolation, depressurization, ensuring a safe, gas-free environment, and other safety measures). This ensures the operation’s risk is accepted at the highest level responsible for the process and equipment. The inspector checks that procedures and quality requirements are met, the piping engineer provides the welding procedures and design criteria, and the contractor performs the welding, but the actual approval to proceed rests with the owner/user.