320.253.2699 sales@c4weld.com

Oil & Gas Industry

Off-Shore, Land Exploration & Transmission

Within the oil and gas industry, failures can be catastrophic. We go to extraordinary lengths to ensure welds in this market are flawless and meet customer requirements.

Cladding is a process widely used in the oil and gas industry which bonds corrosion-resistant alloys or hard surface alloys onto base metal of components that are generally used in a high corrosion or high temperature environment.

Critical Welding requires expert knowledge of various materials and many welding processes. C4 Welding specializes in critical welding, and in the cladding process and is committed to meeting your specific project specifications.

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