PAPERS SELECTED FOR THE SYMPOSIUM

• SATISFYING PIPING STRESS AND FLEXIBILITY REQUIREMENTS WITH THE IMPLEMENTATION OF EXPANSION JOINTS (TECHNO-ECONOMICAL OPTIMISATION) - ZADOVOLJAVANJE ZAHTEVA ZA NAPREZANJEM I FLEKSIBILNOŠĆU CEVOVODA PRIMENOM DILATACIONIH KOMPENZATORA (TEHNO-EKONOMSK

  Misa Jocic - PIPETECH Jocic

  Abstract Text

  There have been various attempts to deal with the optimization of solutions which involve expansion joints in piping systems where sufficient flexibility can’t be found using suitable pipe routing. The difficulty of piping designs which involve expansion joints is that they... show full text »
  Abstract Text

  There have been various attempts to deal with the optimization of solutions which involve expansion joints in piping systems where sufficient flexibility can’t be found using suitable pipe routing. The difficulty of piping designs which involve expansion joints is that they rely upon two engineering expertises: Pipe Flexibility and Stress Analysis on one side and Expansion Joint Design and Construction on the other. Arguably distinctively different, they have been looked upon as totally separate engineering disciplines and it is rarely that companies have two of these experts sitting under the same roof. Pipe Stress Engineers basically relied on the support form Expansion Joint Experts on “as required basis” and called upon their knowledge only when needed. Thus, we have the situation where knowledge related to the design and construction of expansion joints sits with expansion joints manufacturing companies, which are totally separate and often remote entities in the design process. Even so, the ever present demand for techno-economical optimizations, now days direct us towards the following observations. The “Traditional method”, where Pipe Stress Engineer defines on his own the requirements for expansion joints and describes them in the technical specification for purchasing is, or should be, a matter of past. This approach may be used only as a first attempt at finding the solution, but given that it never heads in the direction of achieving optimal techno-economical results, needs to be upgraded with additional steps. Bilo je mnogih pokušaja za savladavanje optimizacije rešenja s dilatacionim kompenzatorima u cevovodnim sistemima kod kojih se, uz primenu prikladnog vođenja cevi, ne može ostvariti zadovoljavajuća fleksibilnost cevovoda. Problem pri projektovanju cevododa koji uključuju dilatacione kompenzatore je u tome što se zahtevaju dve inženjerske ekspertize: analize fleksibilnosti i naprezanja cevovoda s jedne te projektovanja i konstrukcije dilatacionih kompenzatora s druge strane. Kako su uverljivo prilično različite, na njih se gledalo kao na potpuno odvojene discipline i retke su firme koje imaju dva takva stručnjaka pod istim krovom. Inženjeri koji se bave naprezanjem cevovoda u osnovi se oslanjaju na podršku stručnjaka za dilatacione kompenzatore na 'regularnoj bazi' i koriste njihovo znanje samo kada je potrebno. Tako postoji situacija da se znanje koje se odnosi na projektovanje i konstrukciju dilatacionih kompenzatora nalazi iskljucivo kod proizvođače te opreme, a to su sasvim odvojeni i često udaljeni cinioci procesa projektovanja cevovodnih sistema. Medjutim bez obzira na to, danas uvek prisutni zahtevi za tehno-ekonomskim optimiziranjem, usmeravaju na sljedeća razmatranja. 'Tradicionalna metoda', kod koje inženjer koji se bavi naprezanjem cevovoda određuje svoje sopstvene zahteve i opisuje ih u tehničkim specifikacijama za nabavu dilatacionih kompenzatora, jeste ili bi trebalo biti stvar prošlosti. Danas se takav pristup može koristiti samo kao prvi pokušaj u pronalaženju rešenja, ali ako se uzme u obzir da nikada ne vodi prema optimalnim tehno-ekonomskim rezultatima, treba biti nadograđen dodatnim koracima. « hide
  Symposium Session: Power Plants life cycle extension, new clean coal technologies | Produženja radnog veka elektrana i novih ekološki čistih tehnologija