Optical Plastics: Material Selection Criteria

Subsea umbilicals are key part on the development of deep water fields. Generally, they are used to connect Platforms to all type of subsea equipment. Umbilicals’ component failure may result to great production losses. Traditionally, Petrobras uses thermoplastic hoses for chemical injection and control applications in its subsea systems; it has acquired a great deal of technical knowledge. Nevertheless, in recently presented layouts, the steel tubes have gained importance worldwide and this was due the increased water depth, integrity and higher pressure / higher temperature. This present paper makes a technical comparison between Steel Tube Umbilicals and Thermoplastic Hose Umbilicals with focus on Petrobras experience. The first part analyzes material selection criteria considering each structure type. Subjects such as material, welding and construction of both types are commented. This work also points to important subjects that suppliers must consider when designing and manufacturing umbilicals. The second part presents the Petrobras’ qualification tests of control umbilicals. Some of the tests that are used for steel tubes, thermoplastic hoses and high collapse resistant hoses are listed as well. On the third part, the focuses are the fatigue analysis, installation procedures and corrosion aspects. The work concludes listing some advantages and disadvantages when using Steel Tube Umbilicals or Thermoplastic Hoses Umbilicals, considering Petrobras scenarios.

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Refractory Wash Raw Material - Selection Criteria and End Results

Whitewares and Materials: Ceramic Engineering and Science Proceedings, Volume 24, Issue 2 - Ceramic Engineering and Science Proceedings ◽

10.1002/9780470294796.ch34 ◽

2008 ◽

pp. 227-227

Author(s):

Mike Tkach

Keyword(s):

Selection Criteria ◽

Material Selection ◽

Raw Material ◽

Raw Material Selection ◽

End Results

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Relating Material Selection and Sustainability in Design

Open House International ◽

10.1108/ohi-02-2018-b0005 ◽

2018 ◽

Vol 43 (2) ◽

pp. 28-32

Author(s):

Elif Sonmez ◽

Filiz Tavsan

Keyword(s):

Renewable Resources ◽

Selection Criteria ◽

Material Selection ◽

Special Importance ◽

Materials Selection ◽

Factors Affecting ◽

Interview Technique ◽

Materials Used ◽

The Relationship

It is likely that under modern-day conditions, design, designer and materials selection would follow a parallel continuum in a cycle. The attitude in materials selection confronts us as one of the substantial values directing the design. Therefore, it should be approached in certain criteria. Today, designers have to put emphasis on not only the setting and style of the space they are designing, but also on the relationship between the materials used and the environment at the same time. In our day, designers have an intense awareness on the use of renewable resources. Hence, it is obvious that a special importance should be given to the fact that the materials are in a cycle of sustainable and recycled. In this study, 15 design offices are asked the question of “what are the factors affecting your materials decisions and what are your selection criteria in general?” by using the interview technique. As a result of interviews conducted with design offices regarding their materials selection, many criteria are identified. It is seen that although sustainability is not clearly stated by designers among these criteria, it actively takes part in the content. In the light of answers provided and interviews, the relationship between materials selection criteria and sustainability will be examined over the standpoints of 12 offices that particularly mentioned the area of sustainability.

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