Standard No.:	GB/T 43327.6-2023
English Name:	Petroleum and natural gas industries—Specific requirements for offshore structures—Part 6: Marine operations
Chinese Name:	石油天然气工业 海洋结构物特殊要求 第6部分：海上作业
Chinese Classification:	E94    Offshore petroleum operation equipment
Professional Classification:	GB    National Standard
ICS Classification:	75.180.10 75.180.10    Exploratory, drilling and extraction equipment 75.180.10
Source Content Issued by:	SAMR; SAC
Issued on:	2023-11-27
Implemented on:	2024-3-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	72500 words
Translation Price(USD):	2175.0
Delivery:	via email in 1~5 business day

Petroleum and natural gas industries - Specific requirements for offshore structures - Part 6: Marine operations 1 Scope This document provides requirements and guidance for the planning and engineering of marine operations, encompassing the design and analysis of the components, systems, equipment and procedures required to perform marine operations, as well as the methods or procedures developed to carry them out safely. This document is applicable to marine operations for offshore structures including ——steel and concrete gravity base structures (GBS); ——piled steel structures and compliant towers; ——tension leg platforms (TLP); ——deep draught floaters (DDF), including spars or deep draught caisson vessels (DDCV); ——floating production semi-submersibles (FPSS); ——floating production, storage and offloading vessels (FPSO); ——other types of floating production systems (FPS); ——mobile offshore units (MOU); ——topsides and components of any of the above; ——subsea templates and similar structures; ——gravity, piled, drag embedded and suction or other anchors; ——tendon foundations; ——associated mooring systems. This document is also applicable to modifications of existing structures, e.g. installation of additional topsides modules. This document is not applicable to the following marine operations: a) construction activities, e.g. in a fabrication yard onshore, where there is no exposure to the marine environment; b) drilling, processing and petrochemical activities; c) routine marine activities during the service life of the structure; d) drilling from mobile offshore drilling units (MODU); e) installation of pipelines, flowlines, risers and umbilicals; f) diving. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 15544 Petroleum and natural gas industries - Offshore production installations - Requirements and guidelines for emergency response ISO 17776 Petroleum and natural gas industries - Offshore production installations - Guidelines on tools and techniques for hazard identification and risk assessment GB/T 23511-2009 Petroleum and natural gas industries - General requirements for offshore structures ISO 19901-1:2005 Petroleum and natural gas industries - Specific requirements for offshore structures - Part 1: Metocean design and operating considerations ISO 19901-4:2003 Petroleum and natural gas industries - Specific requirements for offshore structures - Part 4: Geotechnical and foundation design considerations ISO 19901-7:2005 Petroleum and natural gas industries - Specific requirements for offshore structures - Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units IMCA M 179 Guidance on the Use of Cable Laid Slings and Grommets. The International Marine Contractors Association 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 19900, ISO 19901-1, ISO 19901-4, ISO 19901-7 and ISO 19904-1 and the following apply. 3.1 action external load applied to the structure (direct action) or an imposed deformation or acceleration (indirect action) Example: An imposed deformation can be caused by fabrication tolerances, settlement, temperature change or moisture variation. Note:: An earthquake typically generates imposed accelerations. [GB/T 23511-2009, 2.1] 3.2 action effect effect of actions on structural components Example: Internal forces, moments, stresses, strains, rigid body motions or elastic deformations. [GB/T 35989.1-2018, 3.5] 3.3 air cushion air pumped into underbase compartments of the structure Note: Normally applied in order to reduce the draught and increase the freeboard and/or to alter the structural loading. [ISO 19903:2006, 3.10] 3.4 assembly designed and fabricated group of bulk and equipment items that form one unit [ISO 19901-5:2003, 3.1.1] 3.5 ballast variable solid or fluid content in order to change the draught, stability, trim and/or heel of a structure afloat Note: Adapted from ISO 19901-5:2003, 3.1.2. 3.6 ballast system system used to change the draught, stability, trim and/or heel of a structure afloat 3.7 barge simple floating vessel, normally non-propelled, on which a structure is transported 3.8 basic variable one of a specified set of variables representing physical quantities that characterize actions, environmental influences, geometrical quantities or material properties, including soil properties [GB/T 23511-2009, 2.5] 3.9 bending efficiency factor factor by which the calculated breaking strength of a rope is reduced to take account of the reduction in strength caused by bending around a shackle, trunnion, padear or crane hook 3.10 bollard pull towing or manoeuvring action that can be generated by a tug for an indefinite period of time with its propulsion system running at operational, as opposed to maximum revolutions per minute Note: Bollard pull is expressed in kilonewtons. 3.11 bridging document document that aligns and co-ordinates the requirements and responses of various parties in relation to a specific aspect of a project Note: Commonly used to align and co-ordinate the emergency response procedures for owner and contractors. 3.12 bumper temporary structure designed to protect structures or modules during the initial fitting stage of an installation operation 3.13 characteristic value value assigned to a basic variable associated with a prescribed probability of not being violated by unfavourable values during some reference period Note: The characteristic value is the main representative value. In some design situations, a variable can have two characteristic values, an upper and a lower value. [GB/T 23511-2009, 2.7] 3.14 CoG envelope defined constraint volume within which the centre of gravity (CoG) of an assembly or a module shall remain 3.15 consequence factor factor applied to critical structural components in the design of lifting operations to ensure that these components have an increased factor of safety in relation to the consequence of their failure Note: Consequence factors are additional safety factors, applied to critical structural components of the lifted object over and above the normal safety factors used in a WSD analysis of the lifted object. They are, accordingly, applied to lift points, their attachments to the object and components in the object supporting lift points. They are not intended for application to slings, grommets and shackles. 3.16 construction afloat addition of material or outfitting to the structure while afloat Note: Adapted from ISO 19903:2006, 3.17.