SAW Tube In testing machine

Specifications

Off line / In Line Inspection system for ERW, SAW Tube

ERW, SAW Tube In-Line Inspection System

The ERW, SAW tube In-Line inspection system uses multichannel technology to inspect weld seam and the heat-affected zone (HAZ) of electrical resistance welded (ERW, SAW) tubes. The head rotation capability allows each probe independent movement from -120 to +120 degrees for weld tracking.

 In-line Testing Machine

The SOLID mechanical solution for ERW, SAW tube inspection is based on a small automated bridge (gantry type) that positions the inspection head in-line or off-line when performing inspections, automatic calibrations, or maintenance operations.

Calibration Bench 

The Calibration Bench is an optional stand designed to perform automatic calibration and calibration check sequences at standard inspection speeds.

The calibration sequence is performed by moving each probe over a reference defect on the calibration tube (no tube rotation) to automatically compensate the gain of each beam for each detection gate. The calibration check sequence displays each calibration tube defect in an easy-to-interpret strip chart and weld-mapping view.

Multichannel Weld Inspection 

Due to the different thickness of pipe and inspection requirements, it usually uses several ultrasonic channels to cover the transverse and longitudinal crack, Partition cover will be taken when testing the same position of longitudinal defects.

Tube inspection

For spiral welded tube inspection, the inspection is usually before in roll or rolled the plate, see the photo above. After welding to the rolled plate, the welded tube body and the welding line can be inspected once time, so as to improve production efficiency.

Water Wedge

Each inspection head is designed with a unique Water Wedge mechanical concept providing many degrees of freedom in order to follow pipe movement and maintain perfect coupling.

This versatile concept enables different types of probe holders to be used when inspecting different pipe sizes. Wear plates that can be attached to the inspection head are also available in different sizes to fit each pipe diameter.

Pneumatic suspension enables the inspection head to follow the pipe movement and raise the Water Wedge if there is a scarfing window or butt weld between coils.

Result Analyze

Automatic Weld Tracking

During the process of the welds Automatic inspection, the real-time tracking will be needed to ensure the relative position of the ultrasound probe and weld basically unchanged. The supplication of the laser tracking technology effectively avoids the influence of light, dust, electromagnetic, etc.

Unique patented algorithm based on time-of-flight analysis performs automatic detection of the scarfing area and send feedback to the PLC to automatically adjust the inspection for each water wedge.