ONSTREAM Pipeline Inspection Ltd.

8” Pipeline Inspection System		Download PDF file
Design Characteristics:
Length		2.09m (82”) w/o Geo. 1.56 m (62”)
Weight		84kg (186lbs) w/o Geo. 37 kg (154 lbs)
Metal Loss Sensors		78 Hall Effect, 8.1 mm (0.32”) Spacing
ID/OD Sensors		39
Geometry Sensors		16
Pressure Sensor		1 - 0 to 20.7 MPa (0 to 3000 psi)
Temperature Sensor		1 - 0 to 125 °C (0 to 257 °F)
Sample Rate		2.0 mm (0.08”)
Odometer Channels		2

In-Line Specifications:
Velocity Range		≈ 0 to 3 m/s (0 to 7 mph)
Inspection Range		220 km (136 miles)
Battery Life		80 hours (expandable)
Temperature Range		-10 to +70 °C (+14 to +158 °F)
Maximum Pressure		13.8 MPa (2000 psi)
Minimum Local ID		25% OD, 165 mm (6.5”)
Minimum Bend Radius		1.5D
Max. Inspectable Wall Thickness		8.18 mm (0.322”) Sch. 40
Max. Passable Wall Thickness		18.24 mm (0.718”) Sch. 120

Reporting Specifications:
Isolated Metal Loss		1t × 1t < Defect Area < 3t × 3t
Minimum Depth		0.2t
Depth Sizing Accuracy (80% Conf.)		±0.1t
Length Sizing Accuracy (80% Conf.)		±12.7 mm (0.5”)

General Metal Loss		Defect Area > 3t × 3t
Minimum Depth		0.1t
Depth Sizing Accuracy (80% Conf.)		±0.1t
Length Sizing Accuracy (80% Conf.)		±25.4 mm (1.0”)

Geometry
Reporting Threshold		2% of OD
Sizing Accuracy		±2.5 mm (0.1”)

Location Accuracy
Axial		±0.1%
Circumferential		±15°