Stainless Steel GTAW/TIG Fabrication 2

Course Number: MFG 287
Transcript Title: Stainless Steel GTAW/TIG Fab 2
Created: March 25, 2021
Updated: March 25, 2021
Total Credits: 3
Lecture Hours: 0
Lecture / Lab Hours: 60
Lab Hours: 0
Satisfies Cultural Literacy requirement: No
Satisfies General Education requirement: No
Grading options: A-F (default), P-NP, audit
Repeats available for credit: 0

Prerequisites

Course Description

Builds on MFG 286, introducing Position 3 AWS D1.6 structural code destructive testing as well as working with welding and preparing tube/pipe and pressure vessels. Provides critical skills to handle warp as well as sanitary/food grade stainless steel welding processes. Prerequisites: MFG 286. Audit available.

Intended Outcomes

Upon successful completion of this course, students will be able to:

  1. Create Position 3 Fillet weldments using DC GTAW processes suitable for destructive testing as per AWS D1.6 code.
  2. Create Position 3 Groove weldments using DC GTAW processes suitable for destructive testing as per AWS D1.6 code.
  3. Manufacture and weld product built from stainless steel tube and pipe.
  4. Create stainless steel pressure vessels tested to 35 psi in out of position weldments.
  5. Recognize and account for warp in stainless steel weldments and assemblies.
  6. Demonstrate knowledge of sanitary and food grade welding practices in GTAW DC stainless steel processes.

Outcome Assessment Strategies

Outcomes are assessed through a mixture of hands on and written assessments.  Priority is given to hands-on proficiency based assessment in an environment that rewards demonstration of skill needed for success in industry.

  • Lecture and in booth coaching and direct instruction.
  • Direct instruction in full class demonstration of skills.
  • Written exams.
  • Student proficiency through demonstration of learned strategies and skills in industry standard environment.
  • Mock AWS Testing procedure (destructive testing) or mock local industry supported on-site testing procedures.
  • Job readiness based on performance.
  • In class lab experiments and testing using the scientific process with written result reporting.

Texts and Materials

Resources are available openly on the web, but largely the curriculum adaptation needs to be done based on the instructors existing skill set.  Since there are many ways to teach the content, the “teach what you know, and teach well what you do” is very appropriate for courses like this.

The following books are recommended:
  • Welding Skills, 5th Edition, B.J. Moniz
  • Welding Skills Workbook, 5th Edition, Jonathan F. Gosse
Some Suggested resources:
  • AWS Structural Code Book 2020
  • Aeorspacewelding.com
  • Thefabricator.com
  • Aws.org
  • Millerwelds.com
  • Lincolnelectric.com

Course Activities and Design

The determination of teaching strategies used in the delivery of outcomes is generally left to the discretion of the instructor. Here are some strategies that you might consider when designing your course: lecture, small group/forum discussion, flipped classroom, dyads, oral presentation, role play, simulation scenarios, group projects, service learning projects, hands-on lab, peer review/workshops, cooperative learning (jigsaw, fishbowl), inquiry based instruction, differentiated instruction (learning centers), graphic organizers, etc.

Course Content (Themes, Concepts, Issues and Skills)

Outcome #1: Create Position 3 Fillet weldments using DC GTAW processes suitable for destructive testing as per AWS D1.6 code.
  • Understand American Welding Society (AWS) D1.6 structural code for Stainless Steel GTAW fillet weld process in position 3.
  • Prepare plate for welding according to structural standard.
  • Weld plate to code specification.
  • Prepare plate for destructive testing per AWS Code.
  • Interpret destructive testing results.
Outcome #2: Create Position 3 Groove weldments using DC GTAW processes suitable for destructive testing as per AWS D1.6 code.
  • Understand American Welding Society (AWS) D1.2 structural code for Stainless Steel GTAW Groove weld process in position 3.
  • Prepare plate for welding according to structural standard.
  • Weld plate to code specification.
  • Prepare plate for destructive testing per AWS Code.
  • Interpret destructive testing results.
Outcome #3: Manufacture and weld product built from stainless steel tube and pipe.
  • Build stainless steel weldment and products using multiple facets of fabrication and design including stainless steel tube and pipe.
  • Correctly identify amperage and frequency for appropriate joint fusion depending on location, fitment and process. 
  • Ensure correct blind-side weld quality using appropriate welding process, technique and procedure.
Outcome #4: Create stainless steel pressure vessels tested to 35psi in out of position weldments.
  • Use correct fitup and prep work to ensure the strongest joints possible.
  • Show knowledge of manufacturing procedure and machine adjustments necessary when welding pressure critical out of position joints.
  • Test welded out of position square pressure vessel to 35 psi.
  • Test welded out of position round pressure vessel to 35 psi.
Outcome #5: Recognize and account for warp in stainless steel weldments and assemblies.
  • Define and predict amount of warp an assembly will experience based on the expected heat input.
  • Create basic tacked together assemblies with warp tolerances pre-accounted for.
  • Manufacture and finish assemblies and use quality control best practices to ensure tolerances are met post welding.
Outcome #6: Demonstrate knowledge of sanitary and food grade welding practices in GTAW DC stainless steel processes.
  • Define and explain the uses of sanitary or clean manufacturing principles using stainless steel.
  • Prepare weldments using correct procedures for sanitary and food-grade manufacturing principles.
  • Weld materials using appropriate welding processes to ensure sanitary or food-grade weld outcomes with appropriate joint strength.
  • Post treat weldments or assemblies using correct sanitary or clean welding procedures and food-grade approved chemical processes.

Department Notes

Safety glasses are required at all times in the welding lab and are provided for students. Students may also purchase their own safety glasses from a local supplier. Long pants and closed toed shoes are required in the welding lab at all times. Appropriate clothing must be worn to work in the lab (no synthetic materials, ect.). Safety requirements are covered prior to work in the lab.