Unit 3: Manual Metal Arc Welding Pipe

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Unit 3: Manual Metal Arc Welding Pipe
  • This unit forms part of the Course in MCAST Award in Manual Metal Arc Welding Pipe (MMA). Once a learner complete all the units in this course satisfactorily; that is has obtained a pass mark in the assessment and respected the 80% attendance s/he will achieve an award pegged at MQF Level 4, 11 ECVET Credits.

The course is designed for those determined to obtain a qualification to work in industry with enough skills to produce sound welded joints in a selection of complex fixed positions to meet industry requirements. MMA technology, plate and pipe preparation for welding and weld specimen destructive testing are covered in depth to enable learners to work on their own directly from job specifications.

This course provides progression across a range of welding processes.

This is a 64 hrs of guided learning course. Students need to invest further hours in the course, which will include private study and home assignments.

Lessons are held as indicated on the prospectus and website

Learning Outcome 1: Describe all the necessary operations including welding-set settings and parent metal pipe edge preparation to weld efficiently

Unit Content


  • Preparation of Material: All welds will be produced on a low carbon steel pipe – 100 mm external diameter minimum requirements and by 5 to 10 mm thick.
  • Alignment of pipes before welding: different type of jigs; Edge preparation: hot and cold methods; Pipe Alignment: circular deformation and off-centre alignment.
  • This covers all underpinning technology to produce good weld-mends as well as skills to produce solutions resulting from different sets and from situations that might arise during work such as variation in current/ voltage etc.
  • Start up procedures: Inspection of PPE; risks from fire hazards; risks from electricity inspection of cables and sets; welding power source; current settings; welding leads; return leads; earth leads; weld joint cleaning.

Learning Outcome 2: Weld steel pipes using single-run/ multiple-run Manual Metal Arc (MMA) welds

Unit Content


  • Produce single-run and multiple-run pipe welds in various positions including 6g with specific requirements to intermitted restart of weld.
  • All welds will be produced on a low carbon steel pipe – 100 mm external diameter minimum requirements and by 5 to 10 mm thick. Acceptance is by visual inspection and destructive tests.
  • Weld a single-vee pipe butt weld on the flat-rotated (ASME 1G) position
  • Weld a single-vee pipe weld in the horizontal (ASME 2G) position
  • Weld a single-vee pipe butt weld in the vertical-upwards (ASME 5G) position
  • Weld a pipe tee fillet weld in the vertical-upwards (ASME 5F) position
  • Weld a single-vee pipe butt weld in the inclined (ASME 6G) position

Learning Outcome 3: List the operations involved to produce test samples from welded pipe joints.

Marking: identify datum and mark from test specification; Symbols: follow standard specifications to mark test samples; Method of cutting: list machinery to cut and grind weld specimens.

The following are the suggested pre-requisites and/or entry requirements needed:

Pre-requisites;


  • Students must be capable to take their own responsibility to follow health and safety requirements and technical procedures for the welding and preparation of materials

Entry Requirements:


  • Over 16 years old and satisfactory completed the Level 3 course in Manual Metal Arc Welding

Course participants may be awarded either an MCAST Certificate of Attendance or an MCAST Certificate of Achievement.

MCAST Certificate of Attendance


  • An MCAST Certificate of Attendance will be awarded to those candidates who attend at least 80% of the lessons.

MCAST Certificate of Achievement


  • An MCAST Certificate of Achievement will be awarded to those candidates who satisfy the 80% attendance criteria AND ALSO choose to sit and pass the course assessment/s.
  • Students who opt not to sit for the assessment/s or fail (the assessment/s) will however be awarded an MCAST Certificate of Attendance provided that they fulfill the minimum attendance criteria as stated above.

If the student intends to obtain a Certificate of Achievement, she/he is required to sit for an assessment/s. Assessment/s may take various forms such as a home assignment, class assignment, practical test and time constrained test. However, the assessment/s is not compulsory and an applicant may choose not to sit for it.

During the lessons, students should have their own safety gear to industry standards. (Gear to include safety shoes, cotton boiler suit, safety glasses and gloves)

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