Closed Gap HiLo tool

Key features

• Reduce HiLo

• Measurements accurate to +0.05mm

• Ensure design specifications are met

• Easy to use with magnetic base and calibration/verification stand

• Traceable measurements

• Range of blades available to suit requirement

Better pipe fit-up

Created in response to customer request, the OMS Closed Gap HiLo tool measures the pipe geometry of two pipes aligned for closed gap welding to a high degree of accuracy.

Accuracy over 0.05 mm

Accurate to more than 0.05mm, the OMS Closed Gap HiLo tool is ideal for critical fatigue-sensitive pipeline sections such as steel catenary risers and has been used around the world by all major pipe-lay companies and welders.

Final check before welding

To achieve a good weld and avoid stress concentration pipes must be matched as accurately as possible. In critical fatigue sensitive pipes the HiLo measurement confirms fit-up predictions from the OMS SmartFit process and provides the last check before the pipes are welded. Post-weld pipes may be checked again with OMS weld inspection technology.

Tool specifications

The Closed Gap HiLo tool is placed on the pipe and the magnetic clamp activated. A thumbscrew rotates the blades until they are directly above the joint between two pipes. Previously set to register zero when the blades are of equal length, the dial gauge is pushed into the pipe against the force of a spring until both blades touch the bottom of the J-prep pipes. The dial gauge shows any mismatch in the blades as a positive or negative number. We can repeat the process as many times as required to provide HiLo spot checks.

Determine pipe HiLo

Separate measurements of the “land” of the J-prep determine pipe HiLo. The Closed Gap HiLo tool uses standard digital gauges, is simple to operate and will be familiar to pipe inspectors. All OMS tools are sent out calibrated and we provide a yearly calibration and repair service.