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Standards Development
This document specifies the technical delivery conditions for unalloyed or low-alloy steel seamless and welded pipeline fittings for use in pipeline transportation systems for the petroleum and natural gas industries as defined in ISO 13623.
This document is applicable to welding-end fittings such as elbows, caps, tees, single or multiple extruded headers, reducers, and transition sections made from seamless and welded pipe of unalloyed or low-alloy steels.
This document specifies two classes of fitting one related to material used in non-sour service and one for material to be use in sour service environment as shown in Table 1.
Table 1— Fitting class and service
Fitting class
Service
Class B
NON-SOUR SERVICE
Class S
SOUR SERVICE
This document is not applicable to the selection of the fitting class.
This document is not applicable to the materials for, or the attachment of, factory-welded extensions.
On-land supply systems used by the gas supply industry are excluded from the scope of this standard.
EN 14870-2:2004 is the modified adoption of ISO 15590-2:2003, Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Part 2: Fittings to exclude the aspects that are covered by CEN/TC 234. ISO has published an updated version in August 2021. For this reason, EN 14870-2:2004 needs to be revised to adopt ISO 15590-1:2021 as modified ISO standard by excluding on-land supply systems used by the gas supply industry.
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