Editing notes

Google search index set to off temporarily

Purpose This page is to introduce types of inspections services provided by Caspian.

Loss of section testing box – changed to shorter sentences.

Add link to a new page on stand off base plates, anchor bolt fatigue cracking etc.

Add section on rating – see KIWA docs ISO/IEC 17025

Street Lighting Inspection and Structural Testing

Caspian NDT provide Non Destructive Testing services for street and highway lighting assets throughout the UK.

We provide Street Lighting Inspection and Structural Testing services for both the public and private sectors. Our clients include local authorities, contractors, schools, retail parks, motorway service areas, airports around the UK.

Street lighting structures operate in a corrosive environment while simultaneously being subjected to dynamic wind loads.

Note! Many lighting structures are now being fitted with low energy luminaires.

Material loss due to corrosion and cracking caused by fatigue can significantly reduce the life of the asset and increase risk to the public.

Measurement of material loss caused by corrosion enables the remaining safe life and maintenance requirements of the asset to be determined.

Caspian NDT use the following methods to measurement of material loss and to locate cracking:

1. Visual Examination

In many cases, specialist tools are not required to identify defects that could compromise the structural integrity.

Visual examination is the simplest and quickest method to judge the conditions of the asset. Detailed visual examination is used to identify any visible defects that would compromise structural and functional integrity. For example, corrosion, mechanical damage, loose fasteners etc.

Visual examination could be just be simple observation. Microscopes and magnifying glasses are used to enhance the image. Boroscopes are used for internal examination or locations that are difficult to access.

A range of measuring equipment is used to assess the extent and shape of any defect. e.g. Tape measures, ultra sonic thickness meters, digital calipers, micrometers, laser levels, laser measuring devices etc.

Fig 1.1 Corroded road sign support column

Excessively corroded motor way sign support. The most corroded leg shown here is the closet to the carriage way. Proximity to the carriage way and zone of salt spray has accelerated the rate of corrosion

Ultrasonic Testing (UT

i) Measurement of wall thickness loss due to corrosion at any location above ground level.

ii) Measure of anchor bolt corrosion and fatigue cracking below ground level and within the concrete foundation.


Magnetic Particle Inspection (MPI)

Location and measurement of cracking caused by fatigue, internal defects and physical damage. Typical locations for cracks include columns welds, including swage weld, tube-to-flange welds, attachment bracket welds, corners of access doors, stress concentrations caused by gussets

Eddy Current Testing

Measurement of below ground corrosion of planted (rooted) lighting columns and street furniture

Loss of section testing

High levels of corrosion which than can critically weaken structures often occurs at and just below ground level.

Planted lighting columns are often at the greatest risk of corrosion caused by high levels of chlorides, and moisture.

Specialist Non-Destructive Testing

Our Specialist NDT division covers the Non-Destructive Testing of High Masts, Floodlights, Flanged and Bridge mounted columns, Traffic Mast Arms, Motorway Safety Barriers and other metal structures.

Electrical Testing

To maintain the integrity of our testing activity, all work is carried out by our fully qualified engineers to ensure compliance with current regulations. IEE Regulations requires periodic inspection and testing of lighting installations.