ISO 10976:2012 pdf download.Refrigerated light hydrocarbon fluids -Measurement of cargoes on board LNG carriers.
ISO 10976 establishes all of the steps needed to properly measure and account for the quantities of cargoes on liquefied natural gas (LNG) carriers. This includes, but is not limited to, the measurement of liquid volume, vapour volume, temperature and pressure, and accounting for the total quantity of the cargo on board. This International Standard describes the use of common measurement systems used on board LNG carriers, the aim of which is to improve the general knowledge and processes in the measurement of LNG for all parties concerned. This International Standard provides general requirements for those involved in the LNG trade on ships and onshore.
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 8310, Refrigerated light hydrocarbon fluids — Measurement of temperature in tanks containing liquefied gases — Resistance thermometers and thermocouples
ISO 8943, Refrigerated light hydrocarbon fluids — Sampling of liquefied natural gas — Continuous and intermittent methods
ISO 18132-1, Refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — General requirements for automatic tank gauges — Part 1: Automatic tank gauges for liquefied natural gas on board marine carriers and floating storage
IEC 60533, Electrical and electronic installations in ships — Electromagnetic compatibility
EN 1160, Installations and equipment for liquefied natural gas — General characteristics of liquefied natural gas
API Standard 2217A, Guidelines for Work in Inert Confined Spaces in the Petroleum and Pet rochemical Industries
IACS Unified Requirements ElO
ICS Tanker Safety Guide — Liquefied Gas
ICS/OCIMF/IAPH International Safety Guide for Oil Tankers and Terminals (ISGOTT)
IMO International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code)
NOTE Earlier versions of the gas codes can apply to older ships (see the note to 3.1.13).
SIGTTO Liquefied Gas Handling Principles on Ships and in Terminals
SIGTTO Liquefied Gas Fire Hazard Management
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
absolute pressure
total of the gauge pressure plus the pressure of the surrounding atmosphere
3.1.2
aerating
introduction of fresh air with an acceptable dew point into the tank to purge inert gases and to increase the oxygen content to approximately 21 % of volume so as to ensure a breathable atmosphere
3.1.3
approved equipment
equipment of a design approved by a recognized authority, such as a governmental agency, classification society or other accredited agency which certifies the particular equipment as safe for use in a specified hazardous atmosphere.
ISO 10976 pdf download.