ANSI API RP 17A-2006 pdf download.Design and Operation of Subsea Production Systems—General Requirements and Recommendations.
3.1.4 flowline production/injection line, service line or pipeline through which fluid flows NOTE In this part of ISO 13628, the term is used to describe solutions or circumstances of general nature related to a flowline. 3.1.5 flying lead unarmoured umbilical jumper with a termination plate at either end (incorporating connectors for the various lines) used to connect subsea facilities together NOTE 1 A flying lead is commonly used to connect e.g. a subsea control module on a subsea tree to a subsea umbilical distribution unit. NOTE 2 This type of umbilical jumper is lightweight and hence can be picked up from a deployment basket on the seabed and manoeuvred into position using a free-flying ROV. 3.1.6 jumper short segment of flexible pipe with a connector half at either end NOTE A jumper is commonly used to connect flowlines and/or subsea facilities together, e.g. a subsea flowline to a hard pipe riser installed on a production platform. 3.1.7 process valve any valve located downstream of the tree wing valves in the production flow path 3.1.8 pull-in head device used for terminating the end of a flowline or umbilical so that it can be loaded/offloaded from a vessel and pulled along the seabed and/or through an I-tube or J-tube 3.1.9 second-end connection connection made at the termination point of the flowline or umbilical installation process 3.1.10 spool short segment of rigid pipe with a connector half at either end NOTE A spool is commonly used to connect flowlines and/or subsea facilities together, e.g. a subsea tree to a subsea manifold. 3.1.11 ultra-deep water water depth exceeding 1 830 m (6 000 ft) NOTE 1 Since the physical circumstances of any situtation will change as a function of water depth, use of the term “ultra-deep water” implies that it may be necessary to consider design and/or technology alternatives.
3.1.13 carbon steel alloy of carbon and iron containing up to 2 % mass fraction carbon, up to 1,65 % mass fraction manganese and residual quantities of other elements, except those intentionally added in specific quantities for deoxidation (usually silicon and/or aluminium) NOTE Carbon steels used in the petroleum industry usually contain less than 0,8 % mass fraction carbon. [ISO 15156-1:2009, 3.3] 3.1.14 corrosion-resistant alloys CRAs alloys that are intended to be resistant to general and localized corrosion in oilfield environments that are corrosive to carbon steels NOTE This definition is in accordance with ISO 15156-1 and is intended to include materials such as stainless steels with minimum 11,5 % mass fraction Cr, and nickel, cobalt and titanium base alloys. Other ISO documents can have other definitions. 3.1.15 low-alloy steel steels containing a total alloying element content of less than 5 % mass fraction, but more than that for carbon steel EXAMPLES AISI 4130, AISI 8630, ASTM A182 Grade F22  are examples of low alloy steels. 3.1.16 pitting resistance equivalent number PREN number developed to reflect and predict the pitting resistance of a stainless steel, based on the proportions of Cr, Mo, W and N in the chemical composition of the alloy NOTE This number is based on observed resistance to pitting of CRAs in the presence of chlorides and oxygen, e.g. seawater, and is not directly indicative of the resistance to produced oil and gas environments.
4 Systems and interface descriptions 4.1 General 4.1.1 This clause describes subsea systems and main components in general and defines subsystem interfaces and corresponding specification break points. 4.1.2 Subsea production systems can range in complexity from a single satellite well with a flowline linked to a fixed platform or an onshore installation, to several wells on a template or clustered around a manifold producing via subsea processing/commingling facilities and transferring to a fixed or floating facility, or directly to an onshore installation. 4.1.3 The major components of a typical subsea production system are shown in Figure 1. The various elements are further described in detail in Annex A. 4.1.4 Detailed requirements are given in the following clauses and in subsystem standards of this part of ISO 13628. Some specific requirements are covered by this part of ISO 13628 only. They apply to overall system design, materials, structures, manifold piping, colour and marking, and lifting devices.