PT Provider PTS Bulgaria invites you to take part in proficiency testing scheme No. PTS 26/05-T-1, conducted through an interlaboratory comparison.
The PT scheme is in accordance with ISO/IEC 17043:2023 and includes the laboratory activity “Testing” of bitumen using the standard methods and characteristics indicated in the table below.
The product and the characteristics are within the scope of accreditation of PT Provider PTS Bulgaria of “PTS Bulgaria” Ltd.
Scheme schedule
01 | Start of the scheme
21 May 2026
02 | Deadline for submitting application for participation
16 October 2026
03 | Deadline for sending the PT items
06 November 2026
04 | Deadline for testing and submitting the test results
18 December 2026
05 | Deadline for issuing and mailing the Final Report and Certificate of Participation
29 January 2027
Applications may be submitted until 16 October 2026.
⚠️ After completing and submitting the Application for Participation in PDF format, the application date shall be the date of receipt of the completed application at the e-mail address specified in it.
⚠️ When applying through the electronic form on the website, i.e. through the electronic application, the application date shall be the date of receipt of the automatic e-mail containing the data filled in by you in the application.
More details are available in the Detailed Proficiency Testing Plan and in the Invitation for Participation in section “Documents for Participation”.
Item of the proficiency testing
BITUMEN
TESTING
| Code of the standаrd | Parameter | Number of participations |
|---|---|---|
*EN 1426 |
Penetration (three determinations) |
|
*EN 1427 |
Softening point (two determinations) |
|
*EN 15326+A1 |
Density (three determinations) |
|
*EN 12592 |
Solubility (three determinations) |
|
*EN 12593 |
Fraass breaking point (two or four determinations) |
|
*EN ISO 2592 |
Flash point (three determinations) |
* The tests are performed according to the latest valid version of the specified standard test method.