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 This document specifies the selection criteria and minimum requirements for selecting coatings for pressurized service within process vessels. This is given for the following: — key factors influencing coating selection, — generic composition of test liquids which can be used as references when evaluating supporting testing evidence for coatings, — principal test methods to be used as evidence of performance when selecting suitable coatings, — ensuring that supporting evidence used in evaluating coatings is relevant to the potential end use. This document refers to types of coatings that are generally available, with properties that are known and documented. It also allows other materials to be evaluated and qualified for use. This document is to be used for process vessels coated at the new construction phase. It is intended to be used only where the coating is applied directly to the substrate. This document does not cover requirements related to metallic coatings nor weld overlay materials.

This document gives guidance on how to assess the feasibility of extending the service life of a pipeline system, as defined in ISO 13623, beyond its specified design life. Pump stations, compressor stations, pressure-reduction stations and depots are not specifically addressed in this document, as shown in Figure 1. This document applies to both onshore and offshore rigid metallic pipelines and risers (including SCRs). It is not directly applicable to the following: — flexible pipelines; — pipelines constructed from other materials, such as glass reinforced plastics or polymers; — umbilicals (control and / or chemical conveyance service); — topsides equipment and piping (outside of pipeline system limits defined in accordance with local regulatory requirements); — pipeline protection and support structures and components. NOTE 1 The assessment process defined in clause 5.3 can be applied in the lifetime extension assessment of the above at the discretion of the user. As an example, guidance on use of the process for lifetime extension of unbonded flexible pipe is provided in Annex A. NOTE 2 Further guidance on the lifetime extension of subsea systems, including umbilicals and topsides equipment, is provided in NORSOK U-009. NOTE 3 Although the life extension of structures and structural elements is not addressed in this standard, the continued fitness-for-service of structures having a direct impact on the structural integrity of the pipeline system shall be considered throughout any period of extended operation. This shall include assessment of the implications of structural degradation on pipeline system integrity. Further guidance can be found in NORSOK N-006. This document addresses life extension, which is a change to the original design premise. It is also applicable to other changes to the design premise, such as MAOP re-ratings or a change to the conveyed fluids, at the discretion of the user. Guidance on the latter is provided in Annex B, given the potential for extension to operating life of a pipeline system being solely dependent on a change in operating fluids (such as when considering re-use of a pipeline for CCUS or for hydrogen transportation).

This part of ISO 21028 specifies the toughness requirements of metallic materials for use at a temperature below -80 °C to ensure their suitability for cryogenic vessels. This part of ISO 21028 is not applicable to unalloyed steels and cast materials.

 This part of ISO 13503 provides testing procedures for evaluating proppants used in hydraulic fracturing and gravel packing operations. NOTE Proppants mentioned henceforth in this part of ISO 13503 refer to sand, ceramic, resin-coated, gravel packing proppants, and other materials used for hydraulic fracturing and gravel packing operations. This document supplements API Std 19C, 2nd edition (2018), the requirements of which are applicable with the exceptions specified in this document. The objective of this part of ISO 13503 is to provide consistent methodology for testing performed on hydraulic fracturing and/or gravel packing proppants.