ISO 7507-3:2006

Name: ISO 7507-3:2006 — Petroleum and liquid petroleum products — Calibration of vertical cylindrical tanks — Part 3: Optical-triangulation method
SKU: ISO 7507-3:2006
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Petroleum and liquid petroleum products — Calibration of vertical cylindrical tanks — Part 3: Optical-triangulation method

Название (английский):

ISO 7507-3:2006

Petroleum and liquid petroleum products — Calibration of vertical cylindrical tanks — Part 3: Optical-triangulation method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 43
Дата публикации:: 13 июля 2006 г.
Издание:: ISO IS 7507 edition 2 version 1
ICS:: 75.180.30

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Описание (английский):

ISO 7507-3:2006 specifies a calibration procedure for application to tanks above 8 m in diameter with cylindrical courses that are substantially vertical. It provides a method for determining the volumetric quantity contained within a tank at gauged liquid levels. The measurements required to determine the radius are made either internally or externally. The external method is applicable only to tanks that are free of insulation. ISO 7507-3:2006 is suitable for tanks tilted up to a 3 % deviation from the vertical, provided that a correction is applied for the measured tilt as described in ISO 7507-1.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 7507-3:2006 - "Petroleum and liquid petroleum products - Calibration of vertical cylindrical tanks - Part 3: Optical‑triangulation method" specifies an optical‑triangulation procedure for calibrating large vertical cylindrical tanks. The standard is intended for tanks above 8 m in diameter with substantially vertical cylindrical courses and provides methods to determine tank radii and develop volumetric capacity tables from gauged liquid levels. Measurements can be made internally or externally; the external method applies only to tanks free of insulation. The method is suitable for tanks tilted up to 3% from vertical when tilt corrections from ISO 7507‑1 are applied.

Key topics and technical requirements

Measurement methods: Optical triangulation using theodolites or total stations, with optional stadia for distance measurement.

Equipment: high‑precision theodolite (angular resolution ≤ 0.2 mgon), total station with distance resolution ≈ 0.1 mm, low‑power laser emitter coupled to theodolite optics, stadia (≥ 2 m) with known thermal expansion, heavy weights to steady tripod, and interior lighting.

Set‑up and procedures: stabilizing tripods, allowing instruments to equilibrate to ambient temperature (recommended ~1 hour), filling new/repaired tanks to working capacity and resting 24 h prior to calibration, recording liquid depth/temperature/density and estimating tank‑shell temperature gradient for uncertainty assessment.

Distance measurement: horizontal distances between instrument stations can be determined by stadia (not recommended >25 m) or by total station; repeat measurements and averaging are required to meet tolerance criteria.

Data processing and quality control: procedures and annexes cover computation of internal radii (including least‑squares methods), development of tank capacity tables, tolerances, uncertainty evaluation, and instrument checks.

Applications and who uses it

Petroleum storage operators and terminal managers performing volume inventory and custody transfer calibrations.

Calibration service providers and metrology labs carrying out tank calibration surveys.

Site engineers and surveyors who require a standardized optical method for deriving accurate tank capacity tables.

Safety and regulatory bodies referencing best practice for volumetric measurement of liquid petroleum products.

Practical advantages include a non‑contact optical method suitable for large tanks, the ability to perform internal or external surveys, and detailed guidance on equipment, tolerances, and uncertainty estimation.

Related standards

ISO 7507‑1:2003 - Strapping method (tilt correction reference)

ISO 7507‑2 - Optical‑reference‑line method

ISO 7507‑4 - Internal electro‑optical distance‑ranging method

ISO 7507‑5 - External electro‑optical distance‑ranging method

Keywords: ISO 7507-3:2006, optical triangulation method, calibration of vertical cylindrical tanks, tank calibration, theodolite, total station, stadia, petroleum storage.

ISO 7507-3:2006

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Технические детали

ISO 7507-1:2003

Petroleum and liquid petroleum products — Calibration of vertical cylindrical tanks — Part 1: Strapping method

ISO 7507-2:2005

Petroleum and liquid petroleum products — Calibration of vertical cylindrical tanks — Part 2: Optical-referen…

ISO 7507-4:2010

Petroleum and liquid petroleum products — Calibration of vertical cylindrical tanks — Part 4: Internal electr…

ISO 7507-5:2000

Petroleum and liquid petroleum products — Calibration of vertical cylindrical tanks — Part 5: External electr…