What is a pipelayer or pipefitter?

Answer 1

Plumbers, of a sort. Here's some info from the U.S. Department of Labor. Most people are familiar with plumbers, who come to their home to unclog a drain or install an appliance. In addition to these activities, however, pipelayers, plumbers, pipefitters, and steamfitters install, maintain, and repair many different types of pipe systems. For example, some systems move water to a municipal water treatment plant and then to residential, commercial, and public buildings. Other systems dispose of waste, provide gas to stoves and furnaces, or supply air-conditioning. Pipe systems in powerplants carry the steam that powers huge turbines. Pipes also are used in manufacturing plants to move material through the production process. Specialized piping systems are very important in both pharmaceutical and computer-chip manufacturing. Although pipelaying, Plumbing, pipefitting, and steamfitting sometimes are considered a single trade, workers generally specialize in one of the four areas. Pipelayers lay clay, concrete, plastic, or cast-iron pipe for drains, sewers, water mains, and oil or gas lines. Before laying the pipe, pipelayers prepare and grade the trenches either manually or with machines. Plumbers install and repair the water, waste disposal, drainage, and gas systems in homes and commercial and industrial buildings. Plumbers also install plumbing fixtures

Answer 2

A pipeliner is a welder with a specialized skillset in welding pressure and transmission pipe line in order to aid in transporting fuel, gas or other liquids from the production zone to the market. Pipeliners typlically carry all their tools and specialty equipment with them on their trucks. For more information feel free to call PATRIOT Industrial Services or visit our website at patriotstainlessusa.com

Answer 3

It could be a machine that lays pipe (drainage pipe for example.

It could be a person who works putting pipe in the ground for any number of reasons.