ISO 8311-2013 PDF

Full title and description

ISO 8311:2013 — Refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — Calibration of membrane tanks and independent prismatic tanks in ships — Manual and internal electro-optical distance‑ranging methods. (Also published in French: Hydrocarbures réfrigérés et combustibles gazeux liquéfiés à base non pétrolière — Étalonnage des réservoirs à membrane et réservoirs pyramidaux — Méthodes manuelles et par mesurage électro‑optique interne de la distance).

Abstract

Specifies methods for internal measurement (calibration) of membrane tanks used aboard ships transporting refrigerated light hydrocarbon fluids, and sets out the calculation procedures to produce tank capacity tables and correction tables for cargo quantity computations. With modifications it can also be applied to independent prismatic (prismatic) tanks; it covers both manual measurement procedures and internal electro‑optical distance‑ranging (EODR) techniques.

General information

• Status: Published (International Standard; confirmed).
• Publication date: 2013-12 (Edition 2, 2013).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 75.180.30 (Volumetric and measurements; petroleum / LPG handling).
• Edition / version: Edition 2 (2013).
• Number of pages: 42 pages.

Key bibliographic and lifecycle details above are taken from the ISO catalogue and adopted national/European versions. This edition replaced ISO 8311:1989 and was reviewed/confirmed in a subsequent periodic review.

Scope

Defines a standardized procedure for internal physical measurement of membrane-type cargo tanks on ships carrying refrigerated light hydrocarbons, including how to derive tank capacity tables and correction (trim, list, temperature) tables used for onboard cargo calculations. It addresses use of scaffolding and safe access for manual measurement and specifies the internal electro‑optical distance‑ranging (EODR) method as an alternative for measuring internal geometries. The standard can, with modifications, be applied to independent prismatic tanks.

Key topics and requirements

• Procedures for internal measurement of membrane tank geometry (manual measurement using scaffolding and fixtures).
• Internal electro‑optical distance‑ranging (EODR) measurement methodology and access/safety considerations.
• Calculation methods for producing tank capacity tables (volume vs. height) and correction tables (trim, list, temperature).
• Requirements for measurement reporting, data reduction and documentation sufficient for cargo quantity computation.
• Guidance on adapting methods for independent prismatic tanks where applicable.

The above topics reflect the principal technical content described in the standard and its national/adopted versions.

Typical use and users

Used by shipbuilders, shipyard survey teams, marine measurement/calibration laboratories, cargo surveyors, classification societies, naval architects and operators involved in the design, calibration and custody transfer measurement of refrigerated hydrocarbon and liquefied gaseous cargo tanks aboard ships. It is consulted when producing or verifying tank tables used for cargo quantity calculations.

Related standards

ISO 8311:2013 supersedes ISO 8311:1989 (withdrawn). EN ISO 8311 is the adopted European version; national standards bodies have published corresponding national adoptions (EN/EVS/SIS etc.). Normative references cited within ISO 8311 include relevant safety and equipment standards such as laser safety and explosive‑atmosphere guidance where EODR and access methods are concerned.

Keywords

membrane tank, prismatic tank, calibration, tank calibration, internal measurement, electro‑optical distance‑ranging (EODR), ship tanks, refrigerated hydrocarbon, liquefied gaseous fuels, tank capacity table, correction tables.

FAQ

Q: What is this standard?

A: ISO 8311:2013 is an international standard that defines methods for the internal measurement and calibration of membrane-type cargo tanks (and, with modification, independent prismatic tanks) used on ships carrying refrigerated light hydrocarbons and non‑petroleum based liquefied gaseous fuels.

Q: What does it cover?

A: It covers manual internal measurement procedures (using scaffolding and supporting arrangements), internal electro‑optical distance‑ranging (EODR) measurement, and the calculation procedures required to compile tank capacity and correction tables for cargo quantity computations.

Q: Who typically uses it?

A: Shipyards, classification societies, cargo surveyors, marine calibration laboratories, ship operators and naval architects involved in tank calibration and cargo measurement use this standard.

Q: Is it current or superseded?

A: ISO 8311:2013 is the current edition (Edition 2, published 2013). It replaced ISO 8311:1989 and was reviewed and confirmed in ISO’s periodic review process (confirmation noted in ISO catalogue information). Users should check with their national standards body for any subsequent amendments or national adaptations.

Q: Is it part of a series?

A: It is part of the body of ISO work on measurement of refrigerated hydrocarbon and liquefied gaseous fuels (work of ISO/TC 28/SC 5). While not a numbered “series” in itself, it is linked to other maritime and measurement standards referenced normatively (for safety and equipment requirements).

Q: What are the key keywords?

A: membrane tank, prismatic tank, calibration, internal measurement, EODR, tank capacity table, correction tables, refrigerated hydrocarbon, liquefied gaseous fuels.