Portland Community College | Portland, Oregon

Course Number:
WLD 224
Course Title:
Gas Tungsten Arc Welding: (Mild Steel) Pipe I
Credit Hours:
4
Lecture Hours:
0
Lecture/Lab Hours:
80
Lab Hours:
0
Special Fee:
$24.00

Course Description

Develops knowledge and skills required to weld mild steel pipe in all positions using the gas tungsten arc welding (GTAW) process. Prerequisites: Department permission required. Audit available.

Addendum to Course Description

This is an outcome based course utilizing a lecture/lab format.  This course includes classroom discussions, videotapes, and lab demonstrations covering technical skills. Course outcomes will include;  theoretical concepts, layout, fabrication and welding.

Intended Outcomes for the course

  • Function safely in the PCC Welding Lab.
  • Interpret blueprints to accurately lay out, prepare, assemble and weld joints to specified tolerances.
  • Demonstrate welding an open root groove joint on plates in the horizontal, vertical and over head positions; and on 6 inch schedule 80 pipe in the horizontal position. 
  • Apply visual examination principles and practices in accordance with ASME Section IX.

Course Activities and Design

Welding lec/lab courses are Open-Entry and Open-Exit (OE/OE) and are offered concurrently. Courses are designed to meet the needs of the student with flexible scheduling options. Students may attend full time or part time. This is an OE/OE course which does not align with the normal academic calendar.

Outcome Assessment Strategies

The student will be assessed on his/her ability to demonstrate the development of course outcomes. The methods of assessment may include one or more of the following: oral or written examinations, quizzes, written assignments, visual inspection and welding tests.

Course Content (Themes, Concepts, Issues and Skills)

Function safely in the PCC Welding Lab.

  • Understand and practice personal safety by using proper protective gear
  • Understand and practice and power tool safety
  • Understand and maintain a safe work are.
  • Recognize and report dangerous electrical and air/gas hose connections

Interpret blueprints to accurately lay out , prepare and assemble weld joints. 

  • Interpret lines, symbols, views and notes
  • Layout material per specification
  • Assemble weld project per specification
  • Prepare 6 inch diameter pipe using the oxy- fuel pipe beveler

Demonstrate welding an open root groove joint on plates in the horizontal, vertical and over head positions; and on 6 inch schedule 80 pipe in the horizontal position. 

  • Assemble and weld plate and pipe in the 2G, 3G and 4G positions using GTAW and SMAW processes
  • Demonstrate correct welding techniques
  • Follow welding procedure

Apply visual examination principles and practices in accordance with ASME Section IX.

  • Evaluate welds using appropriate welding inspection tools
  • Assess weld discontinuities causes and corrections