In 1994 THIELE received certification according to ISO 9001 / EN 29001. The brand name THIELE ensures constant high performance. The certification is of utmost importance for the THIELE Group. We only use superior quality......In 1994 THIELE received certification according to ISO 9001 / EN 29001. The brand name THIELE ensures constant high performance. The certification is of utmost importance for the THIELE Group. We only use superior quality high grade steel with high percentage purity. A strict monitoring of each manufacturing step as well as a inspection of the final product by a magnetic cracking test and load test ensures that our products are made for the highest requirements. All THIELE employees are aware of the importance of the quality of our products and ensure it also. It starts by professional consulting to our customers, a precise production, a final testing in the production and ends with mobile testing service at site.