ISO 19901-1-2015 PDF

Full title and description

ISO 19901-1:2015 — Petroleum and natural gas industries — Specific requirements for offshore structures — Part 1: Metocean design and operating considerations. This International Standard gives requirements for determining and using meteorological and oceanographic (metocean) conditions for the design, construction and operation of offshore structures used in the petroleum and natural gas industries.

Abstract

Provides general requirements for the determination and use of metocean parameters (extreme, long‑term statistical distributions and normal conditions) to define actions and limiting environmental conditions for new and existing offshore structures, mobile offshore units, and for pre‑service/post‑service activities (fabrication, transport, installation, decommissioning). The document addresses parameter selection, characterization and application for design, assessment and operations.

General information

• Status: Published (International Standard; stage: to be revised).
• Publication date: October 2015 (publication listed 14 Oct 2015).
• Publisher: ISO (International Organization for Standardization).
• ICS / categories: 75.180.10 (Petroleum and natural gas industries — Offshore structures).
• Edition / version: Edition 2 (2015).
• Number of pages: 206 pages.

Scope

Specifies requirements for selecting, characterizing and applying meteorological and oceanographic parameters to determine design and operational environmental conditions for offshore structures in the petroleum and natural gas industries. It applies to extreme and abnormal metocean values (long return periods), long‑term statistical distributions (marginal, joint and conditional), and frequently occurring environmental conditions for use in design, assessment, site‑specific MOU (mobile offshore unit) evaluations, and for defining weather windows and limits during fabrication, transportation, installation and decommissioning.

Key topics and requirements

• Definition and selection of metocean parameters required to describe site conditions (wind, waves, currents, water level, ice/sea-ice where applicable, etc.).
• Characterization of extremes and abnormal events, including return‑period considerations and joint/marginal statistics.
• Long‑term statistical descriptions and methodologies for deriving representative distributions for design and assessment.
• Application guidance for design actions, construction and installation activities, operational limits and weather‑window definition.
• Cross‑references to topic‑specific ISO documents for jack‑ups, arctic structures and topsides where specialized metocean guidance is required.

Typical use and users

Used by offshore structural and marine engineers, metocean specialists, site assessment teams, FEED/detail designers, installation contractors, asset operators and regulators to define environmental design bases and operational limits for offshore facilities. It is commonly referenced in design specifications, site assessments and installation planning for oil & gas and related offshore projects.

Related standards

Part of the ISO 19901 series and the broader ISO 19900 family for offshore structures. Closely related documents include ISO 19901-2 (seismic design procedures and criteria), ISO 19901-3 (topsides structures), ISO 19901-5 (weight management) and other ISO 1990x/199xx standards such as ISO 19902 (fixed steel offshore structures) and the ISO 19905/19906 series for jack‑ups and arctic structures.

Keywords

metocean, offshore structures, environmental conditions, wind, waves, currents, extreme events, site assessment, weather windows, petroleum and natural gas industries.

FAQ

Q: What is this standard?

A: ISO 19901-1:2015 is an ISO International Standard that sets requirements for determining and using meteorological and oceanographic (metocean) parameters for the design, construction and operation of offshore structures in the petroleum and natural gas industries.

Q: What does it cover?

A: It covers selection and characterization of metocean parameters (extreme, long‑term and normal conditions), statistical descriptions, and the application of those parameters to design actions, assessments, marine operations and the definition of operational limits and weather windows.

Q: Who typically uses it?

A: Offshore structural engineers, metocean analysts, design consultants, installation contractors, asset operators and regulatory or certification bodies involved in offshore project design, assessment and operations.

Q: Is it current or superseded?

A: ISO 19901-1:2015 replaced the 2005 edition and is published as the 2015 (second) edition; ISO indicates the 2015 edition is current but scheduled for periodic review and a newer edition/FDIS has been prepared (ISO/FDIS 19901-1 is shown as under development for a subsequent edition). For historical context, ISO 19901-1:2005 was withdrawn and superseded by the 2015 edition.

Q: Is it part of a series?

A: Yes — it is Part 1 of the ISO 19901 series (specific requirements for offshore structures) and is intended to be used together with other parts of the ISO 19900/19901 family (for seismic, topsides, weight management, marine operations, jack‑up/site‑specific guidance, arctic requirements, etc.).

Q: What are the key keywords?

A: Metocean, offshore, environmental design conditions, wind, waves, currents, extremes, statistical distribution, site‑specific assessment.