ONSTREAM Pipeline Inspection Ltd.

4” Pipeline Inspection System		Download PDF file
Design Characteristics:
Length		1.44m (57”) w/o Geo. -1.17 m (46.4”)
Weight		21kg (47lbs) w/o Geo. -17 kg (38 lbs)
Metal Loss Sensors		36 Hall Effect, 8.9 mm (0.35”) Spacing
ID/OD Sensors		18
Geometry Sensors		10
Temperature Sensor		1 - 0 to 125 °C (32 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		130 km (80 miles)
Battery Life		25 hours (expandable)
Temperature Range		-10 to +70 °C (+14 to +158 °F)
Maximum Pressure		13.8 MPa (2000 psi)
Minimum Local ID		20% OD, 88.9 mm (3.5”)
Minimum Bend Radius		5D (Sch.80)
Max. Inspectable Wall Thickness		5.56 mm (0.219”)
Max. Passable Wall Thickness		8.56 mm (0.337”) Sch. 80

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.)		±25.4 mm (1.0”)

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°