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Introduction Although nickel is generally regarded as a corrosion resistant material its resistance to sea water is only moderate. In fast flowing sea water its corrosion…
Introduction Although nickel is generally regarded as a corrosion resistant material its resistance to sea water is only moderate. In fast flowing sea water its corrosion rate is very low; of the order of 0.0005 in/yr. Under stagnant conditions, however, it is susceptible to pitting and crevice corrosion attack. Consequently, alloying has been a common method of improving corrosion resistance to obtain a material having the excellent resistance of nickel to fast flowing sea water together with an improved resistance to pitting corrosion.
2. Elastomers A wide variety of elastomers, generally synthetic, are used in modern valves of the butterfly and diaphragm types with the dual function of lining/protecting…
2. Elastomers A wide variety of elastomers, generally synthetic, are used in modern valves of the butterfly and diaphragm types with the dual function of lining/protecting internal metal surfaces in contact with the duty and providing the necessary interference for sealing. Without resorting to exotic and expensive metals of construction, even most aggressive services can be successfully handled by variation of elastomer type, while the particular compound is designed to still retain the physical characteristics necessary for optimum sealing. The number of permutations is thus large and indeed one manufacturer offers as many as 18 different resilient liner options. The main elastomer types are summarised:
Summary This paper examines the function, protection and applications of complex components such as valves in off‐shore environments. Materials of Construction and the…
Summary This paper examines the function, protection and applications of complex components such as valves in off‐shore environments. Materials of Construction and the coating/lining techniques and procedures available to ensure acceptable function and protection are discussed, while the limitations of existing painting specifications from the point of view of the component manufacturer are emphasised. Off‐shore services utilising valves are summarised and the types of valves to be found in service on production platforms are indicated.
On‐site Pipeline Production. WE can all easily conjure up a picture of pipe‐laying operations with mounds of earth from the trench, the trench‐digging plant and possibly pipewrapping equipment prominently arrayed. An essential part of the picture is, of course, the line of pipe sections on the surface awaiting installation. But are these great lengths of pipe really an essential part of the scene? Apparently not.
The purpose of this paper is to examine the nature of supply chain complexity and extend this with literature developed within the project domain. The authors use the lens…
The purpose of this paper is to examine the nature of supply chain complexity and extend this with literature developed within the project domain. The authors use the lens of ambidexterity (the ability both to exploit and explore) to analyse responses to complexity, since this enables the authors to understand the application of known solutions in conjunction with innovative ones to resolve difficulties. This research also seeks to investigate how managers respond to supply chain complexities that can either be operationally deleterious or strategically beneficial.
The authors develop a descriptive framework based on the project management (PM) literature to understand response options to complexity, and then use interviews with supply chain managers in six organisations to examine the utility of this framework in practice. The authors ask the research question “How do managers in supply chains respond to complexities”?
The case study data show first that managers faced with structural, socio-political, or emergent supply chain complexities use a wide range of responses. Second, over a third of the instances of complexity coded were actually accommodated, rather than reduced, by the study firms, suggesting that adapting to supply chain complexity in certain instances may be strategically appropriate. Third, the lens of ambidexterity allows a more explicit assessment of whether existing PM solutions can be considered or if novel methods are required to address supply chain complexities.
The descriptive framework can aid managers in conceptualising and addressing supply chain complexity. Through exploiting current knowledge, managers can lessen the impact of complexity while exploring other innovative approaches to solve new problems and challenges that evolve from complexity growth driven by business strategy.
This study addresses a gap in the literature through the development of a framework which provides a structure on ways to address supply chain complexity. The authors evaluate an existing project complexity concept and demonstrate that it is both applicable and valuable in non-project, ongoing operations. The authors then extend it using the lens of ambidexterity, and develop a framework that can support practitioners in analysing and addressing both strategically necessary supply complexities, together with unwanted, negative complexities within the organisation and across the supply chain.
Portfolios of temporary organisations, particularly portfolios of R&D projects with different project partners, are a common yet understudied phenomenon. We know that…
Portfolios of temporary organisations, particularly portfolios of R&D projects with different project partners, are a common yet understudied phenomenon. We know that these portfolios suffer from tensions inherent in project portfolio ambidexterity (e.g. portfolios balancing R&D projects with new and recurrent partners), yet our understanding of what might lessen these tensions remains limited. This study introduces the idea of project portfolio maturity and theorises how it can mitigate the negative effects of ambidextrous project portfolios. We test our hypotheses by combining proprietary survey and archival data on 136 R&D project portfolios in the German biotechnology industry covering project partnerships with both new and recurrent partners. Our results show that ambidextrous project portfolios hamper firm performance and that portfolio maturity mitigates these negative effects. By introducing a new perspective on project portfolios that accounts for overlooked temporal dimensions, this study provides a new contingency that has the potential to ease the tensions that result from projects with new and recurrent partners. We thereby add to the literatures on temporary organising, project portfolios, and ambidexterity.