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EVS-EN ISO 19901-7:2026
Specific requirements for offshore structures - Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units (ISO 19901-7:2026)
Käsitlusala: This document specifies methodologies for:
a) the design, analysis and evaluation of stationkeeping systems for floating offshore structures;
b) the assessment of stationkeeping systems for site-specific applications of mobile offshore units and construction units.
Originally developed for floating structures used in the oil and gas industry, this document is now also used in the renewable energy sector. The extent of application of this document to floating structures used in other industries is at the discretion of the relevant standard entity and its users. For example, IEC 61400-3-2 for floating wind applies this document to determine stationkeeping system responses while incorporating its own load conditions, safety factors, and environmental return periods.
This document is applicable to the following types of stationkeeping systems, which are either covered directly in this document or through reference to other guidelines:
— spread mooring systems;
— single point mooring systems;
— dynamic positioning systems;
— thruster-assisted mooring systems.
This document is not applicable to:
— stationkeeping systems which do not have redundancy against failure of any single component, e.g., single anchor leg moorings (SALMs);
— stationkeeping systems which use any means other than mooring lines or thrusters such as tower soft yoke systems, or tension leg platforms (TLPs) that use tendons.
The requirements for this document address spread mooring systems and single point mooring systems with mooring lines composed of steel chain, steel wire or synthetic fibre rope.
This document is applicable to all aspects of the life cycle of mooring systems. It includes requirements relating to the selection of mooring components, mooring system configuration and performance, components design, installation, post-installation survey, and as-installed assessments as needed for mooring integrity management.
For mooring systems deployed in ice-prone environments, additional requirements in ISO 19906 apply.
a) the design, analysis and evaluation of stationkeeping systems for floating offshore structures;
b) the assessment of stationkeeping systems for site-specific applications of mobile offshore units and construction units.
Originally developed for floating structures used in the oil and gas industry, this document is now also used in the renewable energy sector. The extent of application of this document to floating structures used in other industries is at the discretion of the relevant standard entity and its users. For example, IEC 61400-3-2 for floating wind applies this document to determine stationkeeping system responses while incorporating its own load conditions, safety factors, and environmental return periods.
This document is applicable to the following types of stationkeeping systems, which are either covered directly in this document or through reference to other guidelines:
— spread mooring systems;
— single point mooring systems;
— dynamic positioning systems;
— thruster-assisted mooring systems.
This document is not applicable to:
— stationkeeping systems which do not have redundancy against failure of any single component, e.g., single anchor leg moorings (SALMs);
— stationkeeping systems which use any means other than mooring lines or thrusters such as tower soft yoke systems, or tension leg platforms (TLPs) that use tendons.
The requirements for this document address spread mooring systems and single point mooring systems with mooring lines composed of steel chain, steel wire or synthetic fibre rope.
This document is applicable to all aspects of the life cycle of mooring systems. It includes requirements relating to the selection of mooring components, mooring system configuration and performance, components design, installation, post-installation survey, and as-installed assessments as needed for mooring integrity management.
For mooring systems deployed in ice-prone environments, additional requirements in ISO 19906 apply.
Alusdokumendid: ISO 19901-7:2026; EN ISO 19901-7:2026
Asendab: EVS-EN ISO 19901-7:2013
EVS-EN ISO 20846:2026
Petroleum and related products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method (ISO 20846:2026)
Käsitlusala: This document specifies an ultraviolet (UV) fluorescence test method for the determination of the sulfur content of the following products:
— having sulfur contents in the range 3 mg/kg to 500 mg/kg:
- motor gasolines containing up to a mass fraction of 3,7 % (3,7 % (m/m)) of oxygen [including those blended with a volume fraction of ethanol up to about 10 % (10 % (V/V))];
- diesel fuels, including those containing up to a volume fraction of about 50 % of fatty acid methyl ester (FAME);
— having sulfur contents in the range of 3 mg/kg to 45 mg/kg:
- synthetic fuels, such as hydrotreated vegetable oil (HVO) and gas to liquid (GTL);
— having sulfur contents in the range of 3 mg/kg to 30 mg/kg:
- neat FAME (B100) and diesel fuels containing volume fraction of more than 50 % of FAME.
Other products (for example process feeds and effluents) can be analysed and other sulfur contents can be determined according to this test method, however, no precision data for products other than automotive fuels and for results outside the specified range have been established for this document. Halogens interfere with this detection technique at concentrations above approximately 3 500 mg/kg.
— having sulfur contents in the range 3 mg/kg to 500 mg/kg:
- motor gasolines containing up to a mass fraction of 3,7 % (3,7 % (m/m)) of oxygen [including those blended with a volume fraction of ethanol up to about 10 % (10 % (V/V))];
- diesel fuels, including those containing up to a volume fraction of about 50 % of fatty acid methyl ester (FAME);
— having sulfur contents in the range of 3 mg/kg to 45 mg/kg:
- synthetic fuels, such as hydrotreated vegetable oil (HVO) and gas to liquid (GTL);
— having sulfur contents in the range of 3 mg/kg to 30 mg/kg:
- neat FAME (B100) and diesel fuels containing volume fraction of more than 50 % of FAME.
Other products (for example process feeds and effluents) can be analysed and other sulfur contents can be determined according to this test method, however, no precision data for products other than automotive fuels and for results outside the specified range have been established for this document. Halogens interfere with this detection technique at concentrations above approximately 3 500 mg/kg.
Alusdokumendid: ISO 20846:2026; EN ISO 20846:2026
Asendab: EVS-EN ISO 20846:2019
ISO 23335:2026
Natural gas — Upstream area — Determination of hydrate equilibrium temperature
Käsitlusala: This document specifies a method for determining the phase equilibrium point of natural gas hydrates in a laboratory setting under constant volume conditions, including the principle, reagents and materials, apparatus, procedure, expression of results, test report and precision.
This document applies to laboratory simulations of hydrate formation and decomposition processes. It involves the analysis of collected temperature and pressure data to determine the phase equilibrium temperature of hydrates.
This document applies to laboratory simulations of hydrate formation and decomposition processes. It involves the analysis of collected temperature and pressure data to determine the phase equilibrium temperature of hydrates.
Alusdokumendid:
ISO 14532:2026
Natural gas — Vocabulary
Käsitlusala: This document establishes the terms and definitions that are used in the field of natural gas, natural gas substitutes, mixtures of natural gas with gaseous fuels (such as unconventional and renewable gases) and wet gas.
Alusdokumendid:
Asendab: ISO 14532:2014
ISO 19901-1:2026
Specific requirements for offshore structures — Part 1: Metocean design and operating considerations
Käsitlusala: This document provides two broad types of requirements for the determination and use of meteorological and oceanographic (metocean) conditions for the design, construction and operation of offshore structures:
those related to the determination of environmental conditions in general, together with the metocean parameters that are required to adequately describe them;
those related to the characterization and use of metocean parameters for the design, the construction activities or the operation of offshore structures.
This document covers the following environmental conditions and metocean parameters:
extreme and abnormal values of metocean parameters that recur with given return periods that are considerably longer than the design service life of the structure;
long-term distributions of metocean parameters in the form of cumulative, conditional, marginal or joint statistics of metocean parameters;
normal environmental conditions that are expected to occur frequently during the design service life of the structure.
Metocean parameters specified in this document are applicable to:
the determination of actions for the design of new structures;
the determination of actions for the assessment of existing structures;
the site-specific assessment of mobile offshore units;
the determination of limiting environmental conditions, weather windows, actions and action effects for pre-service and post-service situations (i.e. fabrication, transportation and installation or decommissioning and removal of a structure);
the operation of the platform, where appropriate.
It is beyond the scope of this document to provide detailed instructions that can be followed to produce reliable estimates of extreme or abnormal conditions in all areas and in all cases.
those related to the determination of environmental conditions in general, together with the metocean parameters that are required to adequately describe them;
those related to the characterization and use of metocean parameters for the design, the construction activities or the operation of offshore structures.
This document covers the following environmental conditions and metocean parameters:
extreme and abnormal values of metocean parameters that recur with given return periods that are considerably longer than the design service life of the structure;
long-term distributions of metocean parameters in the form of cumulative, conditional, marginal or joint statistics of metocean parameters;
normal environmental conditions that are expected to occur frequently during the design service life of the structure.
Metocean parameters specified in this document are applicable to:
the determination of actions for the design of new structures;
the determination of actions for the assessment of existing structures;
the site-specific assessment of mobile offshore units;
the determination of limiting environmental conditions, weather windows, actions and action effects for pre-service and post-service situations (i.e. fabrication, transportation and installation or decommissioning and removal of a structure);
the operation of the platform, where appropriate.
It is beyond the scope of this document to provide detailed instructions that can be followed to produce reliable estimates of extreme or abnormal conditions in all areas and in all cases.
Alusdokumendid:
Asendab: ISO 19901-1:2015
Asendatud standardid
EVS-EN ISO 19901-7:2013
Petroleum and natural gas industries - Specific requirements for offshore structures - Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units (ISO 19901-7:2013)
Käsitlusala: This part of ISO 19901 specifies methodologies for a) the design, analysis and evaluation of stationkeeping systems for floating structures used by the oil and gas industries to support 1) production, 2) storage, 3) drilling, well intervention and production, 4) production and storage, 5) drilling, well intervention, production and storage, and b) the assessment of stationkeeping systems for site-specific applications of mobile offshore units (e.g. mobile offshore drilling units, construction units, and pipelay units). Most stationkeeping systems used with the class of floating structures covered by a) are termed “permanent mooring systems”, for which this part of ISO 19901 is applicable to all aspects of the life cycle and includes requirements relating to the manufacture of mooring components, as well as considerations for in-service inspections. Most stationkeeping systems used with mobile offshore units, the class covered by b), are termed “mobile mooring systems”. Throughout this part of ISO 19901, the term “floating structure”, sometimes shortened to “structure”, is used as a generic term to indicate any member of the two classes, a) and b). This part of ISO 19901 is applicable to the following types of stationkeeping systems, which are either covered directly in this part of ISO 19901 or through reference to other guidelines: - spread moorings (catenary, taut-line and semi-taut-line moorings); single point moorings, anchored by spread mooring arrangements; dynamic positioning systems; thruster-assisted moorings. Descriptions of the characteristics and of typical components of these systems are given in Annex A. The requirements of this part of ISO 19901 mainly address spread mooring systems and single point mooring systems with mooring lines composed of steel chain and wire rope. This part of ISO 19901 also provides guidance on the application of the methodology to synthetic fibre rope mooring systems, and includes additional requirements related to the unique properties of synthetic fibre ropes. This part of ISO 19901 is applicable to single anchor leg moorings (SALMs) and other single point mooring systems (e.g. tower soft yoke systems) only to the extent to which the requirements are relevant. This part of ISO 19901 is not applicable to the vertical moorings of tension leg platforms (TLPs). The methodology described in this part of ISO 19901 identifies a set of coherent analysis tools that, combined with an understanding of the site-specific metocean conditions, the characteristics of the floating structure under consideration, and other factors, can be used to determine the adequacy of the stationkeeping system to meet the functional requirements of this part of ISO 19901. NOTE For moorings deployed in ice-prone environments, additional requirements are given in ISO 19906.
Alusdokumendid: ISO 19901-7:2013; EN ISO 19901-7:2013
Asendatud: EVS-EN ISO 19901-7:2026
ISO 14532:2014
Natural gas -- Vocabulary
Käsitlusala: ISO 14532:2014 establishes the terms, definitions, symbols, and abbreviations used in the field of natural gas.
The terms and definitions have been reviewed and studied in order to cover all aspects of any particular term with input from other sources such as European Standards from CEN (The European Committee for Standardization), national standards, and existing definitions in the IGU Dictionary of the Gas Industry.
The definitive intention of ISO 14532:2014 is to incorporate the reviewed definitions into the ISO/TC 193 source standards.
The terms and definitions have been reviewed and studied in order to cover all aspects of any particular term with input from other sources such as European Standards from CEN (The European Committee for Standardization), national standards, and existing definitions in the IGU Dictionary of the Gas Industry.
The definitive intention of ISO 14532:2014 is to incorporate the reviewed definitions into the ISO/TC 193 source standards.
Alusdokumendid:
Asendatud: ISO 14532:2026
ISO 19901-1:2015
Petroleum and natural gas industries -- Specific requirements for offshore structures -- Part 1: Metocean design and operating considerations
Käsitlusala: ISO 19901-1:2015 gives general requirements for the determination and use of meteorological and oceanographic (metocean) conditions for the design, construction and operation of offshore structures of all types used in the petroleum and natural gas industries.
The requirements are divided into two broad types:
- those that relate to the determination of environmental conditions in general, together with the metocean parameters that are required to adequately describe them;
- those that relate to the characterization and use of metocean parameters for the design, the construction activities or the operation of offshore structures.
The environmental conditions and metocean parameters discussed are:
- extreme and abnormal values of metocean parameters that recur with given return periods that are considerably longer than the design service life of the structure,
- long-term distributions of metocean parameters, in the form of cumulative, conditional, marginal or joint statistics of metocean parameters, and
- normal environmental conditions that are expected to occur frequently during the design service life of the structure.
Metocean parameters are applicable to:
- the determination of actions for the design of new structures,
- the determination of actions for the assessment of existing structures,
- the site-specific assessment of mobile offshore units,
- the determination of limiting environmental conditions, weather windows, actions and action effects for pre-service and post-service situations (i.e. fabrication, transportation and installation or decommissioning and removal of a structure), and
- the operation of the platform, where appropriate.
NOTE Specific metocean requirements for site-specific assessment of jack-ups are contained in ISO 19905-1, for arctic offshore structures in ISO 19906 and for topside structures in ISO 19901-3.
The requirements are divided into two broad types:
- those that relate to the determination of environmental conditions in general, together with the metocean parameters that are required to adequately describe them;
- those that relate to the characterization and use of metocean parameters for the design, the construction activities or the operation of offshore structures.
The environmental conditions and metocean parameters discussed are:
- extreme and abnormal values of metocean parameters that recur with given return periods that are considerably longer than the design service life of the structure,
- long-term distributions of metocean parameters, in the form of cumulative, conditional, marginal or joint statistics of metocean parameters, and
- normal environmental conditions that are expected to occur frequently during the design service life of the structure.
Metocean parameters are applicable to:
- the determination of actions for the design of new structures,
- the determination of actions for the assessment of existing structures,
- the site-specific assessment of mobile offshore units,
- the determination of limiting environmental conditions, weather windows, actions and action effects for pre-service and post-service situations (i.e. fabrication, transportation and installation or decommissioning and removal of a structure), and
- the operation of the platform, where appropriate.
NOTE Specific metocean requirements for site-specific assessment of jack-ups are contained in ISO 19905-1, for arctic offshore structures in ISO 19906 and for topside structures in ISO 19901-3.
Alusdokumendid:
Asendatud: ISO 19901-1:2026
EVS-EN ISO 11299-1:2018
Plastics piping systems for renovation of underground gas supply networks - Part 1: General (ISO 11299-1:2018)
Käsitlusala: This document specifies the requirements and test methods for plastics piping systems intended to be used for the renovation of underground gas supply networks. It is applicable to pipes and fittings, as manufactured, as well as to the installed lining system. It is not applicable to the existing pipeline or any sprayed coatings or annular filler.
This document gives the general requirements common to all relevant renovation techniques.
This document gives the general requirements common to all relevant renovation techniques.
Alusdokumendid: ISO 11299-1:2018; EN ISO 11299-1:2018
Asendatud: EVS-EN ISO 11301-1:2026
EVS-EN ISO 11299-3:2018
Plastics piping systems for renovation of underground gas supply networks - Part 3: Lining with close-fit pipes (ISO 11299-3:2018)
Käsitlusala: This document, in conjunction with ISO 11299-1, specifies requirements and test methods for close-fit lining systems intended to be used for the renovation of gas supply networks.
It applies to pipes and fittings, as manufactured, as well as to the installed lining system. It is applicable to polyethylene (PE) pipe of either solid wall single layer or co-extruded layer construction, which is reduced in the factory or on site to provide a close-fitting independent or interactive pressure pipe liner, as well as associated fittings and joints for the construction of the lining system. This document is not applicable for coated PE pipes having a peelable, contiguous, thermoplastics additional layer on the outside of the pipes.
It is applicable to PE pipes, fittings and assemblies intended to be used at an operating temperature of 20 °C as the reference temperature.
NOTE For other operating temperatures, guidance is given in ISO 4437-5:2014.
It applies to pipes and fittings, as manufactured, as well as to the installed lining system. It is applicable to polyethylene (PE) pipe of either solid wall single layer or co-extruded layer construction, which is reduced in the factory or on site to provide a close-fitting independent or interactive pressure pipe liner, as well as associated fittings and joints for the construction of the lining system. This document is not applicable for coated PE pipes having a peelable, contiguous, thermoplastics additional layer on the outside of the pipes.
It is applicable to PE pipes, fittings and assemblies intended to be used at an operating temperature of 20 °C as the reference temperature.
NOTE For other operating temperatures, guidance is given in ISO 4437-5:2014.
Alusdokumendid: ISO 11299-3:2018; EN ISO 11299-3:2018
Asendatud: EVS-EN ISO 11301-1:2026
EVS-EN ISO 11299-2:2018
Plastics piping systems for renovation of underground gas supply networks - Part 2: Lining with continuous pipes (ISO 11299-2:2018)
Käsitlusala: This document, read in conjunction with ISO 11299-1, specifies requirements and test methods for pipes and fittings which are part of plastics piping systems installed as continuous pipes in the renovation of underground gas supply networks. It is applicable to polyethylene (PE) pipes of three different types:
— PE solid wall single layered pipes (nominal outside diameter, dn), including any identification stripes;
— PE pipes with co-extruded layers on either or both the outside and inside of the pipe (total outside diameter, dn), as specified in Annex A, where all layers have the same MRS rating;
— Coated PE pipes (outside diameter, dn) having a peelable, contiguous, thermoplastics additional layer on the outside of the pipe ("coated pipe"), as described in Annex A.
In addition it covers:
— jointing of pipe lengths by means of butt fusion;
— fabricated and injection-moulded fittings made of PE;
It is applicable to PE pipes, fittings and assemblies intended to be used at an operating temperature of 20 °C as the reference temperature.
NOTE For other operating temperatures, guidance is given in ISO 4437-5:2014.
— PE solid wall single layered pipes (nominal outside diameter, dn), including any identification stripes;
— PE pipes with co-extruded layers on either or both the outside and inside of the pipe (total outside diameter, dn), as specified in Annex A, where all layers have the same MRS rating;
— Coated PE pipes (outside diameter, dn) having a peelable, contiguous, thermoplastics additional layer on the outside of the pipe ("coated pipe"), as described in Annex A.
In addition it covers:
— jointing of pipe lengths by means of butt fusion;
— fabricated and injection-moulded fittings made of PE;
It is applicable to PE pipes, fittings and assemblies intended to be used at an operating temperature of 20 °C as the reference temperature.
NOTE For other operating temperatures, guidance is given in ISO 4437-5:2014.
Alusdokumendid: ISO 11299-2:2018; EN ISO 11299-2:2018
Asendatud: EVS-EN ISO 11301-1:2026
EVS-EN ISO 20846:2019
Petroleum products - Determination of sulfur content of automotive fuels - Ultraviolet fluorescence method (ISO 20846:2019)
Käsitlusala: This document specifies an ultraviolet (UV) fluorescence test method for the determination of the sulfur content of the following products:
— having sulfur contents in the range 3 mg/kg to 500 mg/kg,
— motor gasolines containing up to 3,7 % (m/m) oxygen [including those blended with ethanol up to about 10 % (V/V)], — diesel fuels, including those containing up to about 30 % (V/V) fatty acid methyl ester (FAME), — having sulfur contents in the range of 3 mg/kg to 45 mg/kg,
— synthetic fuels, such as hydrotreated vegetable oil (HVO) and gas to liquid (GTL). Other products can be analysed and other sulfur contents can be determined according to this test method, however, no precision data for products other than automotive fuels and for results outside the specified range have been established for this document. Halogens interfere with this detection technique at concentrations above approximately 3 500 mg/kg.
NOTE 1 Some process catalysts used in petroleum and chemical refining can be poisoned when trace amounts of sulfur-bearing materials are contained in the feedstocks.
NOTE 2 This test method can be used to determine sulfur in process feeds and can also be used to control sulfur in effluents.
NOTE 3 For the purposes of this document, "% (m/m)" and "% (V/V)" are used to represent the mass fraction, w, and the volume fraction, φ, of a material respectively.
NOTE 4 Sulfate species in ethanol do not have the same conversion factor of organic sulfur in ethanol. Nevertheless, sulfates have a conversion factor close to that of organic sulfur.
NOTE 5 Nitrogen interference can occur, see 6.5 for further guidance.
— having sulfur contents in the range 3 mg/kg to 500 mg/kg,
— motor gasolines containing up to 3,7 % (m/m) oxygen [including those blended with ethanol up to about 10 % (V/V)], — diesel fuels, including those containing up to about 30 % (V/V) fatty acid methyl ester (FAME), — having sulfur contents in the range of 3 mg/kg to 45 mg/kg,
— synthetic fuels, such as hydrotreated vegetable oil (HVO) and gas to liquid (GTL). Other products can be analysed and other sulfur contents can be determined according to this test method, however, no precision data for products other than automotive fuels and for results outside the specified range have been established for this document. Halogens interfere with this detection technique at concentrations above approximately 3 500 mg/kg.
NOTE 1 Some process catalysts used in petroleum and chemical refining can be poisoned when trace amounts of sulfur-bearing materials are contained in the feedstocks.
NOTE 2 This test method can be used to determine sulfur in process feeds and can also be used to control sulfur in effluents.
NOTE 3 For the purposes of this document, "% (m/m)" and "% (V/V)" are used to represent the mass fraction, w, and the volume fraction, φ, of a material respectively.
NOTE 4 Sulfate species in ethanol do not have the same conversion factor of organic sulfur in ethanol. Nevertheless, sulfates have a conversion factor close to that of organic sulfur.
NOTE 5 Nitrogen interference can occur, see 6.5 for further guidance.
Alusdokumendid: ISO 20846:2019; EN ISO 20846:2019
Asendatud: EVS-EN ISO 20846:2026