| dc.description.abstract | Mechanical seal selection for pipeline applications can be a challenging task considering the application pressure ranges, speeds, and the properties of the fluids being moved. Variable fluid properties present their own challenges for operators and mechanical seal designs. Equipment operational challenges are also at the forefront and need to be addressed by the mechanical seal. Because of these challenges, there is an ever present and even increased emphasis on the criticality of selecting a robust mechanical seal design and associated support equipment to effectively manage the application demands. Pipeline operators require reliable sealing systems that can handle the range of fluids and conditions while providing a leakage management and safety containment system that meets their local and federal regulations. Selecting the proper seal goes beyond picking one that can handle the pressure, temperature, and speed. Many other factors need to be considered to properly select the precise seal including materials, support system, and leakage management systems to accord with operator’s specifications. The equipment itself may even impose limitations and restrictions to viable seal configurations that warrant consideration during the selection process. The impact of these complexities can be magnified through operational procedures (start-up, shutdown, and post upset or failure); all of which can greatly influence the selection decision. The completion of an appropriate mechanical seal selection can be a daunting task for the user reviewing all potential influencing application factors. The process complexity is compounded when weighing the various advantages and disadvantages of numerous potential mechanical seal configurations and support system arrangements potentially suitable for the operating parameters. This tutorial will identify the intricacies of selecting mechanical seals for varied hydrocarbon pipeline applications and will suggest a rule-based methodology for simplifying the seal and support system selection. The selection method will consider the pumped fluid variables, application, and operational regimes, as well as the legislative and non-legislative requirements for containment strategies and leakage management. The types of seal and support system solutions available by fluid type will be discussed, considering various local user or national preferences. The paper will identify the core attributes that affect seal selection and expand on the benefits and advantages on each solution. | |
