Razvoj postopka rotacijskega varjenja cevi večjega premera

Račič, Matija (author), Klobčar, Damjan (mentor), Pleterski, Matej (comentor)

Pri varjenju procesnih cevovodov je potrebno zagotoviti specifične lastnosti zvarnih spojev, tako da njihova notranjost ne predstavlja površine, ki bi spodbujala rast mikroorganizmov ter posledično kontaminacije celotnega sistema. S tem namenom se za tovrstna varjenja zahteva uporaba mehaniziranega oz. orbitalnega varjenja. Za namene raziskave je varjenje potekalo na rotacijsko varilni napravi RSWM 65/4 za varjenje cevi večjega premera. V diplomskem delu je predstavljena tehnika mehaniziranega varjenja in lastnosti uporabljenih materialov, kakovostne zahteve za zvare v procesnih postrojenjih ter zahteve za odobritev varilnega postopka. V metodologiji raziskave je predstavljeno eksperimentalno varjenje ter preizkusi za izvedbo odobritve varilnega postopka po standardu SIST EN ISO 15614-1:2017/A1:2020 in stopnji 2. Ugotovili smo, da z varilno napravo in razvito tehnologijo varjenja dosegamo ponovljive kakovostne zvare pri cevovodih premera nad 150 mm in debeline, večje od 2 mm.

• Language: Slovenian
• Keywords: varjenje TIG, varjenje cevovodov, nerjavno jeklo, avtomatizacija, kvalifikacija varilnega postopka.
• Work type: Bachelor thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2024
• PID: 20.500.12556/RUL-164805
• Publication date in RUL: 13.11.2024

Secondary language

• Language: English
• Title: Development of a rotary welding process for large diameter pipes

Abstract

When welding process pipelines, it is necessary to ensure that the welded joints have specific properties so that their interior does not provide a surface that would encourage the growth of micro-organisms and consequent contamination of the whole system. To this end, the use of mechanised or orbital welding is required for this type of welding. For the purposes of the study, welding was carried out on an RSWM 65/4 rotary welding machine for welding larger diameter pipes. The thesis presents the mechanised welding technique and the properties of the materials used, the quality requirements for the welds in the process plant and the requirements for the approval of the welding process. The methodology of the research presents experimental welding and tests for welding procedure approval according to SIST EN ISO 15614-1:2017/A1:2020 and level 2. We found that the welding machine and the developed welding technology achieve reproducible quality welds for pipelines with diameters greater than 150 mm and thicknesses greater than 2 mm.

• Keywords: TIG welding, pipeline welding, stainless steel, automation, welding procedure qualification record