320.253.2699 sales@c4weld.com

Pressure Vessels

Pressurized Vessels and Tanks

Engineering and fabricating pressure vessels and tanks has been an integral part of C4 Welding’s history. Whether we are manufacturing ASME vessels (such as aerators, separators and treaters) or atmospheric and non‐code tanks, our experienced engineers and highly skilled workforce will design and build exactly to your specifications.

C4 Welding is completely dedicated to providing you with products that are in absolute compliance with ASME codes backed by testing and certification with our in‐house testing facilities and processes. We have a proven record for delivering critical welding and manufacturing excellence, and a growing roster of satisfied customers.

ISO 9001:2015 Certified Quality Systems

AWS Certified Weld Inspectors

Quality is the highest priority for us. This is demonstrated by having AWS Certified Weld Inspectors (CWI) on staff. The benefits of doing so include the following: the ability to conduct in-process inspections both during welding cycles and at critical control points; and the opportunity to document findings throughout the process. This way, we can provide documentation at any point during the process to validate that the product is being manufactured to the drawings and specifications you provided.  The end result is a proactive, well-managed program that ensures top-quality results, each and every time.

C4 can provide the following tests in-house:

  • Magnetic Particle (MT)
  • Liquid Penetrant (PT)
  • Ultrasonic Test (UT)
  • Visual Test (VT)
  • Functional, Hydro, and Proof Testing



Street Address: 11 Industrial Blvd.

Sauk Rapids, MN 56379 USA


Main Phone: 320.253.2699

Fax: 320.253.4804


Sales-Related Inquiries: 320-253-2699 

Email: sales@c4weld.com


Human Resources-related Inquiries:

320-253-2699 Email: hr@c4weld.com



C4 Welding, Inc. BBB Business Review