pipe welding

Pipe welding is the specialized trade of joining metal pipes by fusing them together, typically using heat and filler material.

It requires particular skill because pipes must be welded from multiple angles, often in confined spaces, and the joints must be watertight or airtight under pressure.

Pipe welders work on pipelines, refineries, power plants, and plumbing systems: He got certified in pipe welding to work on the oil fields.