Pipe welding TIG 141, position H-L045. Stainless (CrNi steels)

Name of the in-service training institution:  OÜ A1koolitus (a1koolitus.ee).

Curriculum title:  Pipe welding TIG 141, position H-L045. Stainless (CrNi steels) – 160 ac.h.

Curriculum group and basis for compiling the curriculum:  521 Mechanics and metalworking.
Level 4 Welder Professional Standard Competencies.

Levels : In-service training for adults.

Languages of instruction: Estonian, Russian or English.

Duration : All year round, 20 study days.

Training registration information: Registration on site or electronically.


Target group and conditions for starting studies:  Adults (from the age of 18) who have so requested will be admitted to the training of a welder on the basis of an application. All applicants who are at least 18 years old and who meet the requirements for starting studies and pass an on-site test will be admitted to study. The test tests make sure that the person who has started their studies has understood what the discipline is and whether he or she is able to perform the given tasks.


Placement in groups : The division of students into groups takes into account the level of existing knowledge and spoken language.


Total study volume (academic hours) :
160 academic hours, of which:

  • 40 ac.h. is a theory that is conducted in a classroom,
  • 116 ac.h. is an internship carried out in a school welding workshop,
  • 4 ac.h. is professional advice in preparation for the exam.

Teaching methods
 : Theoretical lectures. Practice training in an individual welding place consists of performing various tasks of an instructor. 

Independent work:  Processing of materials obtained during theory lectures (30 ac.h), independent work is not included in the study volume (160 ac.h).

Online learning : None. It is possible to apply the theory to a part if contact teaching is not allowed.

Learning objective : At the end of the course the welder butt welds 2 pipes in positions H-L045, TIG 141 according to WPS.


Learning outcomes:

At the end of the training welder:

  1. Uses working drawings, work instructions and technology card (WPS).
  2. Chooses the right tools and welding tools.
  3. Organizes a safe working environment (ventilation and grounding).
  4. chooses means of self-defense (mask and clothing).
  5. Prepares and assembles parts and assemblies according to drawings.
  6. Welds by the TIG 141 method in position H-L045
  7. Selects welding modes according to the set task.
  8. Selects welding materials (welded rods, tungsten electrodes and shielding gas.)
  9. Performs visual inspection using weld templates and measuring tools.


Learning content:

  1. Workplace organization, selection and preparation of production and auxiliary equipment.

1.1 Familiarization with the work drawing, work instructions and technological map (WPS).

1.2 Selection of tools and instruments.

1.3 Selection of welding tools.

1.4 Setting up welding equipment.

1.5 Organizing a proper workplace.

1.6 Selection of personal protective equipment.


  1. Preparation and inspection of parts and assemblies.

2.1 Preparation and compilation of the part.

2.2 Assembly and inspection of assemblies for welding.


  1. Material teaching.

3.1 Properties of the metal.

3.2 CrNi steels. Features and their use.

3.3 Labeling of metals.


  1. TIG welding and post-processing.

4.1 The nature of argon arc welding. TIG principle. Welding of metals using TIG technology.

4.2 Welding equipment. Burner construction.

4.3 Welding materials. Shielding gases according to EN ISO 14175. Tungsten electrodes according to EN ISO 6848. Welding rods according to EN ISO 636.

4.4 Welding technology. Welding arc. Argon welding modes and their selection.

4.5 Welding equipment. Right angle of welding torch and additive rod.
Movement of the welding torch and additive rod in the welding bath.

4.6 Welding of stainless steels and protection of weld roots.

4.7 Butt welding in positions PA, PF, PC.

4.8 Welding butt welds in position H-L045.


  1. Quality control and repair of defects.

5.1 Checking the composition.

5.2 Inspection of welds and repair of defects.

5.3 Carrying out the final inspection.


  1. Exam preparation

6.1      Test work in real exam conditions: butt welding of two pipes by TIG 141 method,
position H-L045, in the presence of an instructor.

6.2     Analysis of the results of the pilot work.

Description of the learning environment: 
 Both the theoretical and practical parts take place at Pae 29, Tallinn. Safety and health requirements are guaranteed in the theory auditorium and workshop. We have 4 classrooms for learning the theory, depending on the subject being taught, each class can accommodate 30+ people. The theoretical part is issued at home to record knowledge electronically (on memory sticks). We also issue both personal protection and tools for practical training.


List of study materials:  DVS study materials. T. Karaganova “Welding idea”
and A. Laansoo “Welding”.


Requirements for graduation, including assessment methods and evaluation criteria:
Participation in at least 80% of theory and practice classes is a prerequisite for graduation. In addition, a theoretical final test must be performed and the part welded in accordance with WPS according to the evaluation criteria.

Evaluation method:
 Theory tests and butt welding of two pipes by TIG 141 method,
position H-L045.


Formation of the final result:

Knowledge and use of professional terminology, successful completion of the practical part of the planned study. Performing a theoretical exam test and performing a practical task using the welding method TIG 141 butt welding of the pipe in position H-L045 according to WPS.


Evaluation criteria:
At least 60% of the correct answers to 20 questions. Welds by the TIG 141 method in position H-L045

According to WPS.


Documents to be issued: If all the conditions set out in the assessment criteria are met, the school will be issued a certificate of successful completion of the curriculum. If the goal is not achieved but the student attends at least 80% of the hours, he / she will be issued with a certificate of participation in the course. If desired, the student can pass a professional exam according to EN ISO 9606-1 after successful completion of the curriculum.


Short description of the content:  The course is intended for workers in the metal industry who are exposed in their daily work and need high-quality and precise welding work. The course is aimed at acquiring professional theoretical and practical knowledge. After completing the course, the student is able to apply the acquired knowledge, namely to weld various materials and details in connection with the performance of their daily tasks using tools and welding equipment. A student who has passed the course and passed the final exam is ready to work or do an internship.


Requirements for the competence of the trainer: Technical or production education, applied education or continuous welding work for 10 years. 2 years of experience as an adult educator.


Theory teacher:  Tatiana Karaganova.

Practice teacher:  Leonid Leonid Žhilyaev.

Curriculum approved: