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Materiały budowlane stosowane do realizacji gazociągów przesyłowych i dystrybucyjnych

Myrczek Józef, Kosmalski Sebastian

Materiały Budowlane

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2022

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nr 10

86--89

PL

Polskie przepisy dopuszczają stosowanie do budowy gazociągów wyroby stalowe i polietylenowe. Parametry wytrzymałościowe stali przewyższają odpowiednie wartości parametrów polietylenu. Gazociągi wysokiego ciśnienia wykonywane są wyłącznie ze stali. Gazociągi niskiego i średniego ciśnienia o maksymalnym ciśnieniu roboczym do 1 MPa mogą być wykonane z polietylenu. Obiekty towarzyszące wykonuje się tylko w technologii stalowej. Wybór odpowiedniego materiału uwzględnia również wiele innych parametrów, takich jak odporność na korozję, łatwość i koszt montażu, proces spajania, odporność na wzrost naprężeń, niezawodność. W artykule opisano cechy obu materiałów w kontekście uwarunkowań formalnych i technicznych.

EN

According to polish regulations two materials can be used in gas pipeline construction, namely steel and polyethylene. The strength parameters of the steel exceed the corresponding values of polyethylene. High pressure gas pipelines are made only of steel. Low pressure and medium pressure gas pipelines with a maximum working pressure up to 1 MPa may be made of polyethylene. The accompanying facilities are made only in steel technology. The selection of the appropriate material takes into account also a number of other parameters, such as corrosion resistance, ease and cost of assembly, the bonding and welding process, resistance to crack, and reliability. The article describes the main features of the materials in relation to formal and technical requirements.

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Kryteria doboru materiałów do wytwarzania gazociągów przesyłowych i dystrybucyjnych

Kosmalski Sebastian, Myrczek Józef

Materiały Budowlane

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2022

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nr 11

13--15

PL

W konstrukcji gazociągów można stosować stal lub polietylen. W artykule przeanalizowano czynniki wpływające na wybór preferowanego materiału konstrukcyjnego. Uwzględniono: wymagania formalne, normatywne, techniczne, ekonomiczne, środowiskowe, bezpieczeństwa, czasu realizacji, warunki operatora/zleceniodawcy oraz występujące ryzyko. Gdy możliwe jest zamienne stosowanie polietylenu i stali, preferowane jest użycie polietylenu. W przypadku wysokiego ciśnienia w gazociągu jedynym dopuszczalnym materiałem jest stal.

EN

Both steel and polyethylene can be used in the construction of gas pipelines. The articles concerns the factors determining the choice of preferred construction material. The following factors were taken into account: formal and normative requirements, technical, economic, environmental, safety, implementation time, operator’s / investor’s requirements and the risk involved. Where polyethylene and steel can be used interchangeably, polyethylene should be preferred. Steel is the only acceptable material for high pressures pipelines.

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Risk management in construction enterprises in Śląskie and Małopolskie voivodships in Poland

Tworek Piotr, Myrczek Józef

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2021

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z. 150

299--308

EN

Purpose: The publication is empirical in its character. The key purpose of the paper is to outline and discuss the results of the empirical research into risk in construction activities carried out by the surveyed contractors in Poland. The paper focuses, in particular, on the use of methods, techniques and tools by construction enterprises from Śląskie and Małopolskie voivodships to respond to the risks they encounter. Design/methodology/approach: The empirical research was conducted in form of a questionnaire interview. The research tools were developed based on in-depth studies of the scholarly literature (theory-cognitive dimension of the research). The paper also uses the methods of synthesis and deduction. In their discussions the authors draw on their own knowledge and experience which they have acquired over many years spent on researching risks faced by a wide range of organisations. Findings: The presented research findings provide the empirical verification of the theoretical background derived from the literature in the field. Research limitations/implications: The paper presents only the selected results of the empirical studies. These research findings concern specific categories of construction risk, which is regarded as a scientific and research category. Practical implications: The paper presents practical knowledge (utilitarian dimension of science) which has been verified empirically in the conducted research. This knowledge is referred to in the scholarly literature as Construction Risk Management (CRM). Originality/value: The empirical studies present an up-to-date status of the knowledge and awareness as demonstrated by the construction contractors participating in the survey. The research findings are presented for the purpose specified in the paper.

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Financial management and risk among Polish developers in the period of covid-19 pandemic

Myrczek Józef, Tworek Piotr, Podstawka Zofia

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

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2021

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z. 154

191--200

EN

Purpose: The paper aims to examine the effectiveness of financial management in business activities conducted by property development enterprises, seen as participants of investment and construction processes in Poland, in the period of the COVID-19 pandemic. The discussions outlined in the paper are underpinned by the category of risk in the construction business and refer to the developers whose operations are based predominantly in the south of Poland. Design/methodology/approach: In its basic part the paper deals with the property development companies in the period of time spanning from December 2019 to December 2020. The empirical research was carried out using case studies. It also takes advantage of some elements of comparative analysis, as well as the method of synthesis and the concept of deduction. In their discussions the authors also draw on their own expertise and the experience gained from the studies they have carried out in the area of risk management in construction organisations for many years now. The conclusions the publication arrives in result also from the knowledge extracted from the literature on the subject matter. Findings: The paper offers an empirical verification of the theoretical contents found in the scholarly literature. Research limitations/implications: The paper addresses a limited range of issues only, selected from the vast area of financial and risk management in property development enterprises which operate on the residential real-estate market. Practical implications: The paper presents some practical insights (the utilitarian dimension of knowledge), verified empirically by means of analyses and evaluations. Originality/value: The deliberations in the paper are hoped to cast some light onto the conditions in which property development enterprises conduct their business during the COVID-19 pandemic and look at their financial standing by analysing the risks encountered in the construction industry. The discussions reviewed in the paper refer to the notion of a so-called black swan, i.e. a category addressed by risk management publications.

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Risk management analysis in construction enterprises in selected regions in Poland

Myrczek Józef, Juraszek Janusz, Tworek Piotr

Technical Transactions

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2020

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Vol. 117, iss. 1

art. no. e2020025

EN

This paper aims to outline the selected issues of risk management in construction enterprises operating in the Silesian and Małopolskie voivodships (Poland). In this context, it seems vitally important to have risk accurately identified, quantified and, consequently, responded to in the right way. Although the paper is mainly empirical in its character, it is based on a theoretical background, particularly when it comes to risk management in the construction industry, which is referred to in the literature on the subject as CRM (Construction Risk Management). The paper contains a review of the literature in this field and uses the method of synthesis. It emphasises the applicability and methodology of the issues discussed here, i.e. those which were verified in the empirical research conducted among construction contractors as participants of investment and construction processes.

PL

Celem artykułu jest przedstawienie wybranych problemów zarządzania ryzykiem w działalności przedsiębiorstw budowlanych w województwie śląskim i małopolskim. W tym kontekście szczególnie istotne jest właściwe zidentyfikowanie ryzyka, co następnie umożliwi jego odpowiednią kwantyfikację oraz reakcję na ryzyko. Chociaż artykuł posiada charakter empiryczny to bazuje na wiedzy teoretycznej, szczególnie w zakresie zarządzania ryzykiem w budownictwie, określanej w piśmiennictwie naukowym mianem CRM (Construction Risk Management). Artykuł zawiera przegląd literatury przedmiotu. Wykorzystano w nim metodę syntezy. W artykule wskazano na walory utylitarne i aspekt metodyczny przedstawianej problematyki, tj. zagadnień zweryfikowanych w drodze przeprowadzonych badań empirycznych wśród wykonawców budowlanych jako uczestników procesów inwestycyjno-budowlanych.