Experiences Using DNV-RP-F105 in Assessment of Free Spanning Pipelines

2005 ◽  
Author(s):  
Olav Fyrileiv ◽  
Kim Mo̸rk ◽  
Muthu Chezhian
Keyword(s):  
Fatigue Life ◽  
Research And Development ◽  
Design Methodology ◽  
Cost Effective ◽  
Design Phase ◽  
Vortex Induced Vibrations ◽  
Operational Phase ◽  
Pipeline Failures ◽  
Analytical Tools ◽  
Pipeline Design

Free spans often become a challenge in pipeline design and operation due to pipeline installation on uneven seabed or seabed scouring effects. The costs related to seabed correction and span intervention are in many projects considerable. Therefore it is relevant to investigate whether such intervention work is necessary or not. Despite the complexity inherent in free span response, the spans are often designed applying presumably conservative concepts and very simple analytical tools. The DNV guideline no 14 (GL14) for free spanning pipelines was issued in 1998 and has later been updated and issued as an Recommended Practice (DNV-RP-F105) to account for recent technical research and development and accumulated experience applying GL14 in pipeline projects. This code allows vortex induced vibrations (VIV) as long as the pipeline integrity is ensured, by for example checking that the fatigue life is sufficient. By giving design methodology and acceptance criteria for fatigue, the DNV-RP-F105 approaches the real physics of free spans in a better way than older codes and makes it possible to select cost-effective methods both in the design phase and later when re-assessing spans in the operational phase. This paper will briefly discuss some experiences obtained by using the DNV-RP-F105 in free span design/re-assessment. Some examples of pipeline failures due to free span and vortex induced vibrations will also be presented.

Case Studies Highlighting Rapid Repair Methods of Pressurised Pipelines Damaged by Anchors

2018 ◽  
Author(s):  
Dale Millward
Keyword(s):  
Case Studies ◽  
Health And Safety ◽  
Cost Effective ◽  
Pipeline System ◽  
Subsea Pipeline ◽  
Damage Scenarios ◽  
Fail Safe ◽  
Subsea Pipelines ◽  
Marine Vessels ◽  
Pipeline Design

Effective pipeline design and regular maintenance can assist in prolonging the lifespan of subsea pipelines, however the presence of marine vessels can significantly increase the risk of pipeline damage from anchor hazards. As noted in the Health and Safety Executive – Guideline for Pipeline Operators on Pipeline Anchor Hazards 2009. “Anchor hazards can pose a significant threat to pipeline integrity. The consequences of damage to a pipeline could include loss of life, injury, fire, explosion, loss of buoyancy around a vessel and major pollution”. This paper will describe state of the art pipeline isolation tooling that enables safe modification of pressurised subsea pipelines. Double Block and Bleed (DBB) isolation tools have been utilised to greatly reduce downtime, increase safety and maximise unplanned maintenance, providing cost-effective solutions to the end user. High integrity isolation methods, in compliance with international subsea system intervention and isolation guidelines (IMCA D 044 / IMCA D 006), that enable piggable and unpiggable pipeline systems to be isolated before any breaking of containment, will also be explained. This paper will discuss subsea pipeline damage scenarios and repair options available to ensure a safe isolation of the pipeline and contents in the event of an incident DNV GL type approved isolation technology enables the installation of a fail-safe, DBB isolation in the event of a midline defect. The paper will conclude with case studies highlighting challenging subsea pipeline repair scenarios successfully executed, without depressurising the entire pipeline system, and in some cases without shutting down or interrupting production.

THE IDENTIFICATION OF DESIGN FOR MAINTAINABILITY IMPERATIVES TO ACHIEVE COST EFFECTIVE BUILDING MAINTENANCE: A DELPHI STUDY

2015 ◽  
Vol 77 (30) ◽  
Author(s):  
Shubashini Ganisen ◽  
Izran Sarrazin Mohammad ◽  
L. Jawahar Nesan ◽  
Abdul Hakim Mohammed ◽  
Gunavathy Kanniyapan
Keyword(s):  
Delphi Study ◽  
Life Cycle Cost ◽  
Health And Safety ◽  
Cost Effective ◽  
Building Design ◽  
Design Phase ◽  
Criteria And Indicators ◽  
Building Maintenance ◽  
Operation Process ◽  
Design For Maintainability

Incorporating maintainability during the building design is essential to increase overall performance of the building including quality and cost as; the management and operation process of facilities can have a significant impact on cost, health and safety, energy and quality. As a result, a more effective and efficient building facility will be turned over during the post occupancy stage. Literature review reveals that there is a need to implement maintainability during the building design phase; mainly due to the increasing life-cycle cost of the building facilities. A critical review of the literature has been carried out to explore the consideration of maintainability during the building design and subsequently identifies a set of criteria and indicators to be applied during the building design phase to achieve cost effective building maintenance. Thus, this paper opted a four-round Delphi questionnaire survey to identify the relevant design for maintainability criteria and indicators to achieve cost effective building maintenance. 8 designs for maintainability criteria along with the indicators for each of the criterion have been identified. These design for maintainability indicators help the building architects to incorporate maintainability practice during the building design phase and thus help to achieve cost effective maintenance. This paper aims to address the long pending quest of incorporating maintainability during the building design phase and consequently achieve cost effective building maintenance.

Estimating the Influence of Natural Hazards on Pipeline Risk and System Reliability

2004 ◽  
Author(s):  
Michael Porter ◽  
Clint Logue ◽  
K. Wayne Savigny ◽  
Fiona Esford ◽  
Iain Bruce
Keyword(s):  
Natural Hazards ◽  
System Reliability ◽  
Western Europe ◽  
Ground Movement ◽  
Injury Death ◽  
Ground Conditions ◽  
Service Disruption ◽  
Pipeline Failures ◽  
Pipeline Design ◽  
Design Construction

Natural hazards (also known as ground movement or geohazards) can cause pipeline failures, with consequences ranging from injury/death, environmental impact, and property damage, to lengthy service disruption and a failure to achieve delivery targets. In North America and western Europe, pipeline failure resulting from natural hazards are typically rare (but costly) events. However, where difficult ground conditions have not been properly accounted for in pipeline design, construction, and operation, natural hazards may have an overriding influence on pipeline risk and reliability. These issues are discussed, and a framework for estimating the influence of natural hazards on pipeline risk and system reliability is introduced.

scholarly journals Can compensation committees effectively mitigate the CEO horizon problem? The role of co-opted directors

2020 ◽  
Vol 34 (1) ◽  
pp. 1-21
Author(s):  
Ruonan Liu
Keyword(s):  
Corporate Governance ◽  
Research And Development ◽  
Empirical Evidence ◽  
Design Methodology ◽  
Ceo Compensation ◽  
Content Type ◽  
Horizon Problem ◽  
Accruals Management ◽  
Compensation Committees

Purpose This study aims to examine whether compensation committees dominated by co-opted directors are less effective in mitigating the CEO horizon problem. Design/methodology/approach The author uses a sample of 7,280 firm-year observations from 1998 to 2011. Findings In this study, the author finds evidence of opportunistic research and development (R&D) reduction and accruals management in firms with retiring CEOs and compensation committees dominated by co-opted directors. Moreover, it is found that R&D reduction and income-increasing accruals are less discouraged when determining the compensation for retiring CEOs by compensation committees that are dominated by co-opted directors. The results suggest that compensation committees dominated by co-opted directors are less effective in adjusting CEO compensation to mitigate the CEO horizon problem. Originality/value The study reveals that co-opted directors are weak monitors. Moreover, the study adds empirical evidence to the debate of organizations’ CEO horizon problem. Finally, the study adds to the literature on corporate governance, revealing that compensation committees play an important role in mitigating an organization’s CEO horizon problem by adjusting CEO compensation.

scholarly journals AN INTEGRATED DESIGN METHODOLOGY

2011 ◽  
Author(s):  
T. Freiheit ◽  
S. S. Park ◽  
V Giuliani
Keyword(s):  
Design Methodology ◽  
Integrated Design ◽  
Cost Effective ◽  
Global Markets ◽  
Design Tools ◽  
Regulatory Requirements ◽  
Life Cycle Design ◽  
Design Requirements ◽  
Stakeholder Needs ◽  
Integrated Design Methodology

Global markets demand quick product develop-ment that is simultaneously cost-effective and meets stakeholder needs. Many tools and design methodolo-gies have been developed that address individual as-pects of the design problem, such as Axiomatic De-sign, Design for Manufacture, Life Cycle Design, etc. However, competitive viability can be put at risk when a product fails to achieve all customer, business, manufacturing, and regulatory requirements. To de-liver all design requirements, an efficient integrated design methodology is required. This paper proposes a design approach which integrates previously devel-oped design tools to economically achieve essential design objectives, within a framework that facilitates a rapid design process.

scholarly journals OPTIMIZATION OF ZAKAT FUND MANAGEMENT IN REGIONAL ZAKAT INSTITUTION

2018 ◽  
Vol 6 (2) ◽  
pp. 133-139 ◽  
Author(s):  
Tika Widiastuti ◽  
Imron Mawardi ◽  
Anidah Robani ◽  
Aam Slamet Rusydiana
Keyword(s):  
Economic Growth ◽  
Economic Development ◽  
Research And Development ◽  
Design Methodology ◽  
Fund Management ◽  
Threat Analysis ◽  
Gift Economy ◽  
Considerable Research ◽  
Societal Needs ◽  
The Government

Purpose: The implementation of zakat fund management especially in some zakat institutions is considered not optimum yet. This condition is represented by disparity between potential and actual collection. In Islam, the objective of zakat is not only to collect wealth and keep it idle, instead zakat should become a source of productive fund to fulfill societal needs. Some countries with advanced zakat institutions have developed zakat to become a pillar of economic development. Today, each zakat institution is competing against each other to innovate in zakat fund management. Empowerment in zakat institutions with the appropriate strategies will enhance zakat management and distribution for the betterment of zakat recipients (mustahiq) and the Muslim society at large. Design/Methodology/Approach: This research is aimed to analyze optimization of management in regional zakat institution with SWOT (strength, weakness, opportunity, threat) analysis approach with IFE-EFE Matrix. Descriptive qualitative analysis is used to explain optimization of fund in zakat institution. Major Findings:Findings of this research shows that zakat institution should improve their strategy by developing strength and turning threat into opportunities. Originality/Value: The study provides a guideline for regional zakat institution on how they can enhance their role and efficiency to boost the economic growth for the Islamic community in Indonesia. It may also be instrumental for the government to improve in efficiency and innovative manpower, considerable research and development in optimizing Islamic Gift Economy to enhance economic growth of the Islamic community of Indonesia.

The use of hydroxyethyl cellulose as a transparent filling material in finishing polish

2018 ◽  
Vol 47 (4) ◽  
pp. 323-329 ◽  
Author(s):  
Jülide Erkmen
Keyword(s):  
Design Methodology ◽  
Cost Effective ◽  
Hydroxyethyl Cellulose ◽  
Filling Material ◽  
Limited Information ◽  
Content Type ◽  
Alkyd Resins ◽  
Volatile Organic ◽  
Water Saturated ◽  
Practical Implications

Purpose This study aims to propose a solution to decrease the environmental pollution caused by alkyd resins that harm the environment during their production and use. Design/methodology/approach A commercially produced polish formulation was used in the study. To reduce the use of this formulation in finishing polish, a water-saturated transparent solution of hydroxyethyl cellulose was used as a transparent filling material. Findings The use of hydroxyethyl cellulose at its optimum concentration in finishing polish only reduced the gloss by 0.027 per cent. The amount of alkyd was reduced by 24 per cent in weight. Research limitations/implications The literature contained highly limited information on this subject. No transparent filling material was found. Thus, no comparison can be made with other studies. Practical implications The results obtained from this study can help manufacturers in the polish industry to produce varnish in a more cost-effective and eco-friendly way. Originality/value Considerable amount of volatile organic compounds released into the atmosphere as a result of the use of solvent-based dye/varnishes in the woodworking industry alone proves the importance of water-based systems. The results of this study indicate both economic and environmental gain.

Challenges Related to Pipeline Free Spans in Watercourse Crossings

2021 ◽  
Author(s):  
Mario Caruso ◽  
Gerry Ferris ◽  
Hans Olav Heggen ◽  
Burke Delanty
Keyword(s):  
Management Practice ◽  
Economic Loss ◽  
The Past ◽  
Repair Costs ◽  
Vortex Induced Vibrations ◽  
River Erosion ◽  
Liquid Products ◽  
Integrity Management ◽  
Erosion Mechanisms ◽  
Pipeline Failures

Abstract Free span assessment in watercourse crossings for the on-shore pipeline industry has become a more and more important part of pipeline integrity practice. One reason is that it has become increasingly well known that the dominant cause of pipeline failures in watercourse crossings is fatigue failure due to vortex induced vibrations at pipeline free spans. Recognition of this is now being identified in industry recommended practices and owners are incorporating this type of assessment into their pipeline integrity management practice. On shore pipelines are not designed with an allowable free span as is the practice with off-shore pipelines, but are buried. Design codes specify minimum depths of cover when constructed and indicate that pipelines should be maintained so that no excessive loads occur. In the past the no excessive loads requirement has been interpreted that the pipeline must remained buried. As experience from the off-shore environment and increasingly from experience on-shore has shown that most exposed and/or free spans do not fail. Due to various river erosion mechanisms; scour, bank erosion or avulsion, previously buried pipelines do develop free spans. Some of the free spans fail and release products directly into the watercourse. Failures, particularly for liquid products, are very expensive due to the economic loss, repair costs and environment clean-up of the watercourse and its banks. Similarly, costs associated with pipeline replacement for free spanning pipelines or repair of pipelines that might develop free spans are relatively high. It is important to develop an understanding of the probability of the pipeline failing due to a free span, or put another way, determine which free span is a threat to integrity. This paper discusses some of the challenges with assessing free spans in watercourse crossings as part of integrity programs and highlights experiences in assessing this threat to integrity. The objective of this paper is to discuss some of the key uncertainties related to the management of the threat due to free spans. These uncertainties are due to the reliability of information about the free span, water velocity and condition of the pipelines.

Figures in the carpet of branding

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Stephen Brown
Keyword(s):  
Subject Matter ◽  
Design Methodology ◽  
Services Marketing ◽  
Cautionary Note ◽  
Internal Branding ◽  
Content Type ◽  
Figures Of Speech ◽  
Analytical Tools

PurposeMany have noted the role of metaphor in branding understanding. More than mere decorative frills, tropes play a fundamental, foundational part in the process. The purpose of this comment is to consider some of the branding's core conceits and classifies them for scholarly convenience.Design/methodology/approachMetaphors, first and foremost, are figures of speech not analytical tools or techniques. Accordingly, the commentary adopts an appropriate literary approach to its subject matter. Reflective for the most part, it seeks to deconstruct and reconstruct simultaneously. Suggestion not stipulation is the aim.FindingsAfter scrutinising branding's figurative landscape, then focussing on several promising analogies, the commentary concludes with a cautionary note concerning internal branding. Metaphor is not all fun and games, nor the be all and end all of branding understanding.Originality/valueServices marketing possesses two powerful and deeply entrenched tropes – relationships and dramaturgy. Although this comment touches on both, particularly the former, it points out the plethora of figurative possibilities, some fresh, others familiar, that are available to brand managers and researchers both.

Sign in / Sign up

Export Citation Format

Share Document