ISO 18132-1:2011 PDF

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

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Title (English):

ISO 18132-1:2011

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 22
Publication date:: August 2, 2011
Edition:: ISO IS 18132 edition 2 version 1
ICS:: 75.180.30

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Description (English):

ISO 18132-1:2011 establishes general principles for the accuracy, installation, calibration and verification of automatic tank gauges (ATGs) used for custody transfer measurement of liquefied natural gas (LNG) on board an LNG carrier or floating storage. The LNG described in ISO 18132-1:2011 is either fully refrigerated (i.e. at the cryogenic condition), or partially refrigerated, and therefore the fluid is at or near atmospheric pressure. ISO 18132-1:2011 also specifies the technical requirements for data collection, transmission and reception. Specific technical requirements for various automatic tank gauges and accuracy limitations are given in the annexes.

Technical details

Technical committee: ISO/TC 28/SC 5 - Measurement of refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels
SKU: ISO 18132-1:2011

Abstract

Overview

ISO 18132-1:2011 - "Refrigerated hydrocarbon and non‑petroleum based liquefied gaseous fuels - General requirements for automatic tank gauges - Part 1" - defines general principles for the accuracy, installation, calibration and verification of automatic tank gauges (ATGs) used for custody transfer measurement of liquefied natural gas (LNG) on board marine carriers and floating storage. The standard covers fully or partially refrigerated LNG (near atmospheric pressure) and specifies technical requirements for data collection, transmission and reception. Detailed technical requirements and accuracy limitations for specific ATG types are provided in the annexes.

Key topics and technical requirements

Scope & definitions: ATG, ATG system, CTMS (custody transfer measurement system), radar‑type, capacitance‑type, float‑type ATGs.
Safety & compliance: Conformance with electrical area classification (e.g., IEC 60079‑0), classification society rules and national regulations; emphasis on safe handling of cryogenic/hazardous environments.
Design requirements:
- Mechanical rigidity, gastight tank penetrations, chemical compatibility with LNG, low‑temperature tolerance.
- Provisions for routine maintenance, self‑diagnostics and verification with tanks in service.
- Dynamic response to track levels during filling/emptying; minimum measurable level; data filtering/averaging; redundancy and sealing/security.
Installation: Siting, protection of tank surfaces, and prevention of measurement interference (vortex/boiling effects).
Accuracy & calibration:
- Calibration reference methods and readout resolution.
- Recertification procedures, maximum permissible error and calibration frequency (see annexes for specifics).
Data handling: Requirements for reliable data collection, transmission and reception as part of an ATG or CTMS.
Annexes: Normative guidance for radar, capacitance and float ATGs plus informative annexes on accuracy limitations and uncertainty.

Practical applications and users

ISO 18132-1 is essential for organizations involved in LNG custody transfer and on‑board measurement, including:

LNG carrier and floating storage (FSO/FPSO) operators
Naval architects and shipyards specifying ATG installations
Measurement & instrumentation manufacturers (ATG, CTMS)
Classification societies, regulatory bodies and inspection agencies
Third‑party verifiers and calibration laboratories

Use cases include design and acceptance of on‑board ATG systems, procurement specifications, type approval, commissioning, periodic calibration/recertification and dispute resolution during LNG trading.

Related standards

IEC 60079‑0 (electrical apparatus in explosive atmospheres) - referenced for electrical area classification
IACS Unified Requirements (e.g., E10) - for type approval and environmental considerations
ISO 18132 series: Part 2 (shore tanks) and Part 3 (LPG/chemical gases) for related measurement contexts

Keywords: ISO 18132-1, ATG, automatic tank gauge, LNG custody transfer, calibration, verification, radar-type ATG, capacitance ATG, float ATG, CTMS.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope & definitions: ATG, ATG system, CTMS (custody transfer measurement system), radar‑type, capacitance‑type, float‑type ATGs.
Safety & compliance: Conformance with electrical area classification (e.g., IEC 60079‑0), classification society rules and national regulations; emphasis on safe handling of cryogenic/hazardous environments.
Design requirements:
- Mechanical rigidity, gastight tank penetrations, chemical compatibility with LNG, low‑temperature tolerance.
- Provisions for routine maintenance, self‑diagnostics and verification with tanks in service.
- Dynamic response to track levels during filling/emptying; minimum measurable level; data filtering/averaging; redundancy and sealing/security.
Installation: Siting, protection of tank surfaces, and prevention of measurement interference (vortex/boiling effects).
Accuracy & calibration:
- Calibration reference methods and readout resolution.
- Recertification procedures, maximum permissible error and calibration frequency (see annexes for specifics).
Data handling: Requirements for reliable data collection, transmission and reception as part of an ATG or CTMS.
Annexes: Normative guidance for radar, capacitance and float ATGs plus informative annexes on accuracy limitations and uncertainty.

Practical applications and users

ISO 18132-1 is essential for organizations involved in LNG custody transfer and on‑board measurement, including:

LNG carrier and floating storage (FSO/FPSO) operators
Naval architects and shipyards specifying ATG installations
Measurement & instrumentation manufacturers (ATG, CTMS)
Classification societies, regulatory bodies and inspection agencies
Third‑party verifiers and calibration laboratories

Related standards

IEC 60079‑0 (electrical apparatus in explosive atmospheres) - referenced for electrical area classification
IACS Unified Requirements (e.g., E10) - for type approval and environmental considerations
ISO 18132 series: Part 2 (shore tanks) and Part 3 (LPG/chemical gases) for related measurement contexts

Keywords: ISO 18132-1, ATG, automatic tank gauge, LNG custody transfer, calibration, verification, radar-type ATG, capacitance ATG, float ATG, CTMS.

ISO 18132-1:2011 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Related standards

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