Design, Fabrication & Welding

Proper use of stainless steel includes not only selection of the proper type of stainless steel, but needs consideration to how the equipment is designed, and how it is fabricated and especially welded (including post-fabrication processes). Some of this may be covered in governmental regulations and industry guidelines. Some guidance is available below.  See also the main topic Design, Fabrication and Welding.

New Guidance Documents Governing the Selection and Safety-Evaluation of Materials for Food Use
By E. R. Partington, Consultant to the Nickel Institute, presented at the 4th European Stainless steel Science and Market Congress, Paris, France, June 10-13, 2002 (and available here with permission from the Association Technique de la Siderurgie Francaise).

Guidelines for the Welded Fabrication of Nickel-Containing Stainless Steels for Corrosion-Resistant Services  (1992), NI Publication 11007
By R. E. Avery and A.H. Tuthill, 1992. Widely specified for applications where corrosion resistance is required, stainless steels are an excellent choice for chemical, dairy, food, architectural, biotechnology equipment and similar services. This publication is presented in three sections: "For the welder" deals with the differences in welding techniques for nickel-containing stainless steels, versus conventional carbon steels; "For the materials engineer" describes various types of stainless steels and how their metallurgical and corrosion resistant characteristics are affected by welding and heat treating; and, "For the design engineer" which demonstrates how the corrosion performance of stainless steels can be enhanced by good design.

Good Practices Fabrication Austenitic Stainless Steels  e-learning module
An online 64-slide presentation (with accompanying audio) highlighting good practices that should be followed to maintain the corrosion resistance and aesthetic qualities of austenitic stainless steels.

Fabrication Techniques for Successful Orbital Tube Welding , NI Publication 14040
By Barbara K. Henon, reprinted from Tube and Pipe Quarterly, Vol. 7 (1&2), 1997. The past decade has seen a revolution in piping system fabrication technology for many industries. The technology has been driven by the semiconductor industry's need to deliver process gases to the point-of-use at purity levels unheard of 10 years ago. This level of technical sophistication requires a piping system with an extremely smooth interior surface finish to prevent adherence of particulates, moisture, or other impurities to the tubing walls. The increasing demand for high-quality joining of piping systems in these critical industries in the early 1980s resulted in an increased use of portable orbital welding systems that operate on single-phase electrical power.