Kontrola zavara pri izradi distributora izmjenjivača topline nedestruktivnim metodama ispitivanja

undergraduate thesis

• Author: Marko Koljaja
• Mentor: Ivan Jandrlić (mentor)
• Committee member: Stjepan Kožuh (predsjednik povjerenstva)
• Committee member: Ivan Jandrlić (član povjerenstva)
• Committee member: Ljerka Slokar Benić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Metallurgy; Sisak
• Defense date and country: 2021, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract

Izmjenjivači topline su uređaji u kojima se toplinska energija jednog fluida koji struji
kroz izmjenjivač prenosi na drugi fluid koji struji kroz izmjenjivač bez njihovog međusobnog
miješanja. Ovisno o izvedbi, često puta se provodi reparacija postojećih izmjenjivača. Primjer
reparacije postojećeg izmjenjivača topline opisan je u ovom završnom radu. Za reparaciju je
bilo potrebno izraditi novi distributor. Pri konstrukciji i izradi novog distributora korišteni su
tehnički nacrti postojećeg distributora kojeg je bilo potrebno zamijeniti. Pri konstrukciji
korišteni su različiti tipovi zavara, koji su naknadno ispitivani razornim i nerazornim metodama
ispitivanja. U ovom završnom radu dan je opis izmjenjivača topline i njihovih elemenata, kao i
opis uobičajenih metoda ispitivanja bez razaranja. Promatrana je konstrukcija jednog
distributora izmjenjivača topline i praćena su NDT ispitivanja kontrole kvalitete zavarenih
spojeva. Kako se radi o složenoj konstrukciji bilo je potrebno provesti više metoda ispitivanja.
Zaključak kontrole kvalitete je kako su svi zavareni spojevi zadovoljili normom propisane
vrijednosti, te je distributor bio spreman za ugradnju na postojeći izmjenjivač topline.

Abstract (english)

Heat exchangers are instruments in which thermal energy of one fluid, which flows
through exchanger, is transferred to second one that flows through exchanger, without mixing
up two of them. The existing exchangers often need reparation, depending on their performance.
The example of reparation of the one heat exchanger is described in this paper. For reparation,
it was necessary to build a new distributor. In the process of construction and making of new
distributor, technical designs of existing one that needed to be replaced were used. In the process
of construction, different types of welds were used, which were later tested with destructive and
non-destructive methods. In this paper, a description of heat exchangers and their elements are
given, as well as the description of usual non-destructive testing methods. The construction of
new heat exchanger distributor was observed and afterward the NDT quality control test of
welded compounds were monitored. As it was a complex structure, it was necessary to carry
out several testing methods. The conclusion of quality control is that all welded joints meet the
all requirement prescribed by used standards, and the distributor is ready for installation on the
existing heat exchanger.

• Keywords: distributor; izmjenjivač topline; kontrola zavarenih spojeva; nedestruktivne metode ispitivanja
• Keywords (english): distributor; heat exchanger; control of welded joints; non-destructive testing methods
• Language: croatian
• URN:NBN: urn:nbn:hr:115:913360
• Study programme: Title: Undergraduate study program Metallurgy; specializations in: Metallurgical Engineering, Industrial Ecology; Course: Metallurgical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka metalurgije (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka metalurgije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-10-05 07:28:02