Page 45 - Trenchless Technology Piping Installation and Inspection
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Torque Machine Thrust/Pullback Typical Applications Weight (ton) (lb) (ft-lb) Pressure pipelines More than More than More than for river, shore equal to 30 100,000 100,000 approaches, and highway crossings Pressure pipelines Less than 20,000–100,000 900–7000 for river and highway e
Drive Length (ft) Less than equal to 10,000 Less than equal to 900 Less than equal to 600 Comparison of Main Features for Typical HDD Methods
Depth (ft) Less than equal to 200 25–75 Less than equal to 15
Diameter (in.) 24–60 12–24 2–12
Type Large (Maxi) Medium (Midi) Small (Mini) TABLE 1.3
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