ISO 12917-1:2017/Amd 1:2025

Overview

ISO 12917-1:2017/Amd 1:2025 is an important amendment to the international standard ISO 12917-1:2017, focusing on the calibration of horizontal cylindrical tanks used for petroleum and liquid petroleum products. This document updates the manual methods used to ensure accurate measurement and volume determination of these tanks, which are critical for the petroleum industry’s operational efficiency, safety, and regulatory compliance.

Developed by ISO Technical Committee ISO/TC 28 and Subcommittee SC 2, this amendment addresses practical calibration formulas, correction methods, and uncertainty calculations to reflect the latest technological and scientific advancements. It supports operators and calibration professionals in achieving precise tank measurements necessary for inventory control and custody transfer.

Key Topics

• Manual calibration methods for horizontal cylindrical tanks storing petroleum products
• Revised and corrected formulas for volume and dimension calculations to enhance measurement accuracy
• Updates to temperature correction procedures accounting for tank body volume expansion
• Clarification and improvement of uncertainty calculations related to pressure, material properties, and geometric parameters
• Streamlining of calibration instructions including formula renumbering and deletion of redundant notes for clarity
• Guidance on material constants such as Young’s modulus and Poisson’s ratio used in stress and deformation evaluations

This amendment ensures that industry professionals follow standardized procedures that improve repeatability and traceability in tank calibration practices.

Applications

ISO 12917-1:2017/Amd 1:2025 applies broadly across the petroleum and liquid petroleum product sectors where horizontal cylindrical tanks are used. Typical applications include:

• Petroleum storage terminals where accurate volume determination impacts inventory management and trade accuracy
• Refineries and petrochemical plants requiring precise measurement during processing and storage
• Calibration laboratories and inspection agencies conducting manual tank gauging to validate storage tank volumes
• Regulatory and compliance audits to ensure adherence to international measurement standards for custody transfer and environmental reporting
• Tank maintenance and inspection schedules that require volume recalibration following repairs or modifications

By adhering to this updated standard, organizations can reduce measurement errors, optimize stock management, and uphold international best practices.

Related Standards

Professionals using ISO 12917-1:2017/Amd 1:2025 often reference other relevant standards for comprehensive tank management and petroleum product measurement:

• ISO 12917-2 – Calibration of horizontal cylindrical tanks – Part 2: Automatic methods
• ISO 4267-1 – Crude petroleum and liquid petroleum products – Laboratory manual sampling methods
• ISO 4126 Series – Safety devices for protection against excessive pressure
• ISO/IEC 17025 – General requirements for the competence of testing and calibration laboratories

Collaboration with these complementary standards ensures a robust approach to product quality, safety, and measurement precision.

By implementing the latest guidelines from ISO 12917-1:2017/Amd 1:2025, petroleum industry stakeholders can maintain high standards in the measurement and calibration of horizontal cylindrical tanks. This supports operational excellence, reduces uncertainty in volume assessments, and aligns with global best practices in petroleum product handling.