Straightness Tool

The Straightness Tool is designed to allow the operator to quickly and accurately determine the straightness of a pipe.

Key features

  • Laser accuracy over 25 metres

  • Super bright green laser for use outdoors

  • Easy to determine straightness over the length of an object

  • Magnetic clamp enables easy set up and adjustment even on vertical surfaces

  • Professional – no need for tight strings

  • Battery powered and with safety strap

Background

It was noticed that our customers were measuring straightness using fishing lines and visually estimating out of straightness or measuring it using a ruler. We decided to develop a tool that would provide a method that would give a much greater accuracy in an easy to use system of a laser and a target. The laser chosen produces the straight beam with minimum expansion. It is a colour (green) which can be used safely but in daylight. It is green because for a given safe amount of laser energy the beam appears much brighter to our eyes and hence can be used outdoors. The target allows the user to measure out of straightness directly from a digital scale readout.

Why?

Pipes are never absolutely straight. Bends in pipes can be caused in manufacture, during delivery, welding or during the straightening process after spooling. The importance of any kinks or bends will depend on the end use of the pipe in question. In the area of pipeline construction - spoolbase, welding, drilling risers and drilling - tolerances are critical. The tool is not limited to measure pipes, any surface or structure can be measured such as a floor or a jig.

Operation

The Straightness Tool is designed to allow the operator to quickly and accurately determine the straightness of a pipe or structure. Where conditions allow it is possible to measure straightness with a resolution of 1 mm. Over longer distances the accuracy is diminished as it is for any tool.

How?

The OMS system uses a laser beam as a straight line in space. By ensuring that this straight line is the same distance away from the pipe at two locations, i.e. at the beginning and end of the pipe, the straightness can be measured at any other point in between. In this way it is also possible to measure directly end hooking of pipes (the bend at the end of a pipe).