Inspection Body

As of 17.04.2015 TINSA Ltd. is an accredited Inspection Body, type A and holds a Certificate of Accreditation No. 182 OKA, issued by the Bulgarian Accreditation Service Executive Agency.

The scope of accreditation is "Railway infrastructure" with the following Inspection activities:

  1. Geometrical parameters of the railway track;
  2. Bridges;
  3. Electrical Safety and Earthing.

Tests of the railway track’s geometrical parameters are performed by the track measuring laboratory "PLASSER & THEURER" EM-120, which is intended for measuring of geometrical parameters of the railway track in a loaded state with following parameters:
Maximum speed of measuring the track – 120 km/h;
Axle load – 12.5 tons/axle;
Minimum operating radius – 140 m;
Operation /measurement/ in both directions of movement;
The movement speed does not affect the precision of the parameters measured.

The movement of the track measuring laboratory ЕМ-120 is self-propelled with measuring speed of 120 km/h in both directions.

The record of the measured values of the railway track parameters is made every 250 mm simultaneously and in synchronized manner on magnetic type and on PC’s hard-disk in an uniform format. With the help of the measuring-analyzing computer system the data is processed and printed out on paper in real time.

The main parameters that are measured directly are as follows:
– Longitudinal level of each rail individually on a 11800 mm basis;
– Twists of the track measured with three permanent bases: 1800 mm, 3200 mm and 11800 mm;
– Deviation from the standard gauge of 1435 mm;
– Cant – the mutual position of the two rails in height;
– Track position in plane – measurement of the arrows both in curve and in straight with 10000 mm chord.

Besides the directly measured parameters, the following is also possible:
– Calculation of the twist at any basis that is multiple to 250 mm;
– Transition to arrows for 20000 mm chord;
– Calculation of the difference between two adjacent arrows for chords 10000 mm and 20000 mm;
– Registering of external events /signal, bridge, tunnel, turnout, level crossing, etc./ introduced by the operator, as well as automatically registered events /beginning and end of curve, turnout crossing/.

The graphs of the parameters that are measured directly and or/calculated are printed by the printing device on paper with a scale, set in advance by the operator. The changing of the longitudinal scale is possible for all printed parameters simultaneously, while for the transversal scale it is selected for each parameter individually. When printing the selected parameters the zero axis and limiting lines for each parameter in accordance with the category and the class of the measured track section are imprinted.

The track measuring laboratory has an analyzing system that compares the values measured with the set-up in advance limiting values in accordance with the category and the class of the measured track section. This analytical report /report, indicating the values (the defects) that exceed the admissible limits for the relevant class and category of the railway track are indicated by a separate printing device in real time /during the measuring of the track/ and includes the following:
– Name of the parameter measured;
– The start kilometer of the parameter that exceeds the admissible limits for the relevant class and category of the railway track;
– The end kilometer of the parameter that exceeds the admissible limits for the relevant class and category of the railway track;
– The measured length of the track with parameter exceeding the limits;
– Maximum value of the defect;
– Admissible limit for the relevant class and category of the railway track;
– To which class of the railway track the measured value corresponds.

On the same printing device a per-kilometer report is printed out for each measured kilometer that contains:
– Number of defects per measured parameters;
– Summary length per measured parameters for each kilometer.

The record made on magnetic carrier may be replayed in “Playback” mode for additional analysis or for change of the parameters, limiting values or scales (longitudinal and/or transversal).

EM 120 Photo

Integrated systems for Quality Management (QMS), for Environmental Management and for Occupational Health and Safety Management (OHSMS), according to standards ISO 9001:2015, ISO 14001:2015 and OHSAS 18001:2007, are developed, adopted and certified for the activities of the Inspection Body. The management policies of these systems are documented in: