A pipelayer or sideboom^{[citation needed]} is a type of a construction vehicle used to lay pipes. It is used in the construction of oil, gas and water pipelines.

The lifting equipment of pipelayers includes:

• boom, mounted on the left side of the machine
• counterweights
• hydraulic hook and boom winches.

A pipelayer can also be equipped with accessories:

• crane (used to lift and place pipeline elements in a trench)
• dragline (used to backfill a trench)
• rammer (used to compact the soil in an excavation).

Construction, installation, operation, inspection, testing, and maintenance of sidebooms are covered by OSHA standard 1926.1440 - Sideboom cranes^[1] and ASME B30.14 - Side Boom Tractors.^[2]