LBNiW managed two contracts on this project, one directly with Bilfinger Babcock Borsig Steinmüller (BBS) and one with BBS’s main subcontractor – Bilfinger Duro Dakovic Montaza (DDM) which was responsible for the installation of pressure parts of the boilers. In total, more than 7,000 inspection hours were used for the comprehensive service delivery.
Services provided for Bilfinger Babcock Borsig Steinmüller
LBNiW’s main commitment with BBS was to provide examinations and diagnostic measurements on the old part of the installations (old sections of steam pipelines and feedwater lines) that were not going to be replaced in the course of the project but all newly installed pipelines were going to be connected to. Our responsibility was to perform 100% weld integrity testing by UT and MT. Additionally, all bends on the steam pipelines were UT and MT tested, many ultrasonic thickness measurements were taken, and a couple of metallurgical replicas were carried out in order to evaluate material microstructure deterioration due to creep damage. Some of that work we subcontracted to our business partner whose expertise is an in-service inspection of boiler components. All examinations were performed according to the inspection plan provided by BBS. Additionally, we performed various ad-hoc assignments from BBS that included hardness testing, positive material identification, UT, RT, MT and VT of various components.
Services provided for Bilfinger Duro Dakovic Montaza
The vast majority of our work was performed under the contract with Bilfinger Duro Dakovic Montaza during the installation of the pressure parts of boilers K6 and K9. We performed EN 12952-6 compliant weld integrity testing of boiler proper components and EN 13480-5 compliant testing of welds on pipelines external to the boilers. The testing was limited to site welding only and its extent would vary from 10% to 100%. The project team comprised of 7 specialists using the common non-destructive testing techniques: RT, UT, MT, HT, PMI.