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A pipe feeder is a conveyor-based machine that applies continuous axial force to push large-diameter steel pipelines through pre-bored ground — without stopping, without friction spikes, and without open excavation. Unlike cylinder-based pushers that work in strokes, the UNI-PF250 uses a 4-track conveyor to maintain uninterrupted pipe movement across river, road, and railroad crossings from 20 to 56 inches in diameter.

The key difference between a conveyor pipe feeder and a cylinder pipe pusher is continuous vs stroke-based movement. Cylinder systems stop and reset every 3–10 feet, creating static friction spikes that stress the pipe and destabilize the bore. The UNI-PF250 conveyor system moves the pipe without interruption — eliminating spikes, protecting pipe integrity, and reducing installation time on crossings of 20–56 inch steel pipeline.

Installing steel pipeline from 20 to 56 inches requires specialized equipment that scales to the forces involved — often exceeding 1,000,000 lbs of push or pull force on long crossings. This guide covers the three key equipment categories: pipeline-class HDD rigs, pipe feeders, and mud systems. The UNI-PF250 pipe feeder contributes up to 400,000 lbs (200 short tons) of supplementary push force and supports HDD pullback, microtunneling, pipe jacking, and Direct Pipe® tunneling.