![]() ![]() The manifolds are designed to accommodate a wide range of configuration needs and service requirements, while providing a high degree of versatility for pipelay vessel interfaces and installation scenarios. Subsea manifolds are a main part of the subsea production system and are widely used in the offshore industry for commingling and transferring the products. The connection between the manifold and the manifold supporting structure allows the manifold to retrieve and reinstall with sufficient accuracy so as to allow for the subsequent reuse of the production and well jumpers. It provides necessary facilities to guide, level, and orient the manifold relative to the foundation. The manifold support structure is an interface between the manifold and foundation. ![]() The subsea manifold system is mainly comprised of a manifold and a foundation. The wells and pipelines are connected to the manifold by jumpers. A subsea manifold system is structurally independent from the wells. A PLEM is one of the most common manifolds in this range. There are numerous types of manifolds, ranging from a simple pipeline end manifold (PLEM/PLET) to large structures such as an entire subsea process system. Subsea manifolds are installed on the seabed within an array of wells to gather product or to inject water or gas into wells. The manifolds are designed in various configurations, such as template or cluster manifolds with internal or external pigging loops and horizontal or vertical connectors. Subsea manifolds are an integral part of many subsea developments that provides effective gathering and distribution points for subsea systems. The discussion includes the following contents: manifold components manifold design and analysis foundation and suction pile and installation and maintenance. Requirements for individual components such as valves, actuators, and piping will also be detailed. This chapter discusses the issues and standards related to the design, manufacture, and testing of subsea manifolds. Yong Bai, Qiang Bai, in Subsea Engineering Handbook (Second Edition), 2019 Abstract ![]()
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