Cold Link Africa June 2018 | Seite 16

EVENTS AND EXHIBITIONS
INCORPORATING COLD CHAIN
Hendrik Oberholster, lecturer at OTTC( left), congratulating Derek Oberholster, with Isolde Döbelin( director at OTTC) looking on.
Mpumelelo Mahlangu( middle) was one of the sponsorship winners at OTTC. Congratulating him is Hendrik Oberholster, lecturer at OTTC( left), and Isolde Döbelin, director at OTTC.
PROJECTS AND SKILLS
Before entering the workshop, students were trained on basic health and safety and how to work with the various tools needed. After being deemed‘ workshop safe’, students were given various projects to complete.
COPPER REED PIPE The reed pipe consists of smaller copper pipes that need to be swaged and then soldered together with copper tech. The finished product then resembles a reed, made up of various segments.
This simple task enables the students to understand the behaviour of the copper tech when used with oxygen and acetylene when brazing.
When their reed is completed, the students are then instructed to split the reed open with a hacksaw by cutting along the length. This allows for an inside view of the reed, revealing the actual strength and quality of their copper brazing.
This task was done repeatedly by the students until a high-quality brazing was achieved.
• Pipe bending
• How to calculate a ¼ bend and a ½ bend
• Measuring
• Pipe cutting
• Reaming( cleaning inside the copper pipe)
• Deburring( cleaning outside the copper pipe)
• Patiently scrubbing the pipe with steel wool for a clean finish
• Working sparingly with materials.
FLARING, BENDING, AND MEASURING MANIFOLD
This was one of the more complex tasks that students had to do. Students had to apply all their skills to complete their manifolds:
• Copper pipe bending
• Measuring pipes
• Calculations for pipe bending and cutting
• Pipe cutting
• Brazing
• Bending
• Drilling
• Using a spirit level.
Week 1
Week 2
Week 3
• Health and safety regarding copper work and basic health and safety
• Workshop environment safety( OHS)
• Safe working and handling of oxygen and acetylene
• Introduction to pipe-working tools
• Complete training with copper hand tools
• Measuring devices, drilling, and cutting of materials
• Working and understanding of copper
• How to use copper
• Gas welding of copper and different alloys
• Pipe bending to correct dimensions using various calculations.
Students were given a project to complete during the second week. Each student had to build their own artisan sculpture, making use of the copper piping and components available.
Each student was encouraged to put their own stamp of individuality on their sculpture.
Students used all the skills learnt in the previous week’ s training to complete their individual projects.
Due to the magnitude of the final project, students were invited to attend and assist in completing the final project for the third week.
STAR LOOP
COURSE OUTLINE
During this project, students exercised the
Students were instructed on the following
following skills:
during their course.
The artisan sculpture was unveiled at OTTC when the first two groups of students completed their two-week introductory training for artisans.
Photographed on the day, from left: Peter Hoetmer( Metraclark), Isolde Döbelin( OTTC), and Martin Mc Eneaney Nel( OTTC principal).

16 www. coldlinkafrica. co. za COLD LINK AFRICA • June 2018