Since 1978, the Detroit Tubing Mill (DTM) has manufactured premium-quality ERW mechanical and structural tubing. Precision welding, tight tolerances, secondary services, and a wide range of sizes, shapes, and material types and grades make us the right choice for your ASTM A500, A513, and A787 tubing needs.

Superior slitting quality, quick turn-around times, and convenient inbound and outbound shipping have made Detroit Steel Processing (DSP) a regional leader for flat-rolled steel toll-processing and storage services since 1984.

The testing laboratory at Detroit Steel Processing is accredited to the ISO/IEC 17025:2017 standard. We provide mechanical and chemical analysis of flat-rolled material, including hardness, spectroscopic, and tensile testing.

Our Quality Policy

​The companies of RBC Enterprises, Inc.—Detroit Steel Processing and Detroit Tubing Mill—are committed to:
  • ​Understand the requirements and expectations of the customer
  • Deliver reliable, on-time, high-quality products and services
  • Continually Improve

ISO 9001:2015 Certified

Current Certificate