Human and material resources

STS can rely on its qualified women and men to realize your tailor-made projects. STS is well-known for its welding and complex formang skills, to meet all of your requirements !

Our team

87 employees

Technical Department

Industrialization Department

Sales Department

Production Department

Administrative Department

Our skills

Support & advices

Engineering office


Purchases & supplies


Welding technicality

Quality control technicality

Internal controls : visual inspection, Liquid Penetrant Inspection (LPI), Magnetic Particle Inspection (MPI), dimensional inspection, roughness inspection, tightness inspection, dew point inspection by drying, inspection by feritscope, by tests, and by endoscopy, – realized by NDT Inspectors who have the COFREND niv.2, Liquid Penetrant Inspection et particle inspection niv.2 ISO 9712 certifications.

All of our inspection, measuring and test equipment are calibrated in accordance with the ISO 9001 v 2015 standard.

Controls subcontracted to specialized bodies : x-ray inspection, ultrasonic inspection, material analysis by PMI XRF and SEO, helium leak test and hardness test.

Internal training

STS provides internal training to improve its men skills and to support them in the development of their environment.

Trainees, new employees or workers are trained by other experienced employees, who trained a formation called Trainor-Internal Tutor.

Internal trainings : Boilermaker, Welder, Pipe Fitter, Project Manager, NDT Inspectors and Welding Technologist

Production machinery

Used materials

Norms & certifications

Certification ISO