SIST EN ISO 7278-2:2023/kFprA1:2026

Mineralölmesssysteme - Teil 2: Auslegung, Kalibrierung und Betrieb von Rohrprüfgeräten - Änderung 1 (ISO 7278 2:2022/FDAM 1:2026)

Systèmes de mesurage des produits pétroliers - Partie 2: Conception, étalonnage et fonctionnement des tubes étalons - Amendement 1 (ISO 7278-2:2022/FDAM 1:2026)

Merilni sistemi za nafto - 2. del: Načrtovanje, kalibracija in delovanje merilnika cevi - Dopolnilo 1 (ISO 7278-2:2022/FDAM 1:2026)

General Information

• Status: Not Published
• Public Enquiry End Date: 23-Dec-2025
• ICS: 75.180.30 - Volumetric equipment and measurements
• Technical Committee: NAD - Petroleum products, lubricants and related products
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 18-Mar-2026
• Due Date: 06-May-2026
• Completion Date: 14-Apr-2026
• Ref Project: EN ISO 7278-2:2022/A1:2026 - Petroleum measurement systems - Part 2: Pipe prover design, calibration and operation - Amendment 1 (ISO 7278-2:2022/Amd 1:2026)

Relations

• Amends: SIST EN ISO 7278-2:2023 - Petroleum measurement systems - Part 2: Pipe prover design, calibration and operation (ISO 7278-2:2022)
• Effective Date: 01-Dec-2025

Overview

SIST EN ISO 7278-2:2023/kFprA1:2026 is an amendment to the international standard governing petroleum measurement systems, specifically focusing on pipe prover design, calibration, and operation. Issued by CEN, this amendment refines and clarifies guidelines relevant to pipe prover systems used in volumetric measurement within the oil and gas sector. Pipe provers are critical tools for verifying the accuracy of flow meters, ensuring precision in petroleum measurements and compliance with industrial regulations.

This update introduces new practices and detailed requirements for the inspection and sizing of sphere displacers, leak-check procedures, and calibration report documentation, further supporting accuracy and integrity in petroleum measurement applications.

Key Topics

• Pipe Prover System Checks:
  Guidelines specify that, before starting calibration, systems must be checked thoroughly for leakage. Leak testing procedures include examining four-way valves and piston provers, as well as proper inspection of the sphere displacer.

• Sphere Inspection and Measurement:
  The amendment introduces detailed steps for sphere maintenance and sizing:

  • Safe removal and cleaning of spheres prior to inspection
  • Inspection for physical damage, surface wear, and correct inflation
  • Criteria for ordering new or replacement spheres, emphasizing compatibility and appropriate sizing
  • Step-by-step procedures for measuring sphere diameter using micrometers, slip rings, or tapes, including standards for measurement accuracy and equipment calibration

• Acceptable Tolerances and Measurement Methods:
  The standard outlines the importance of discriminating between acceptable and unacceptable sphere ovality. Measurement uncertainty, calibration intervals, and method resolution are detailed, supporting high-precision volumetric measurement.

• Documentation of Calibration Modifications:
  Any temporary changes made during calibration - such as capping leaks or manually assisting valve operations - must be documented as observations in the calibration report.

Applications

SIST EN ISO 7278-2:2023/kFprA1:2026 plays a vital role across various applications within the petroleum industry:

• Flow Meter Calibration:
  Pipe prover systems following this standard ensure highly accurate calibration of flow meters used in custody transfer, pipeline management, and refining operations.

• Quality Assurance and Compliance:
  Adoption of these guidelines facilitates regulatory compliance, supports audit trails, and upholds measurement traceability in oil and gas transactions.

• Maintenance and Safety Operations:
  Detailed procedures for sphere inspection and leak detection enhance operational safety and prolong the service life of measurement equipment.

• Industrial Asset Integrity:
  Accurate measurement practices, backed by structured calibration and rigorous documentation, contribute to optimizing asset performance and reducing product losses.

Related Standards

Organizations implementing SIST EN ISO 7278-2:2023/kFprA1:2026 should also consider the following related standards for a comprehensive approach to petroleum measurement:

• ISO 7278-2:2022 - Petroleum measurement systems - Pipe prover design, calibration, and operation (base standard)
• API MPMS Chapter 4, Section 9, Part 2 - Guidelines regarding sphere ovality and measurement procedures
• EN ISO 5168 - Measurement uncertainty and performance assessment
• ISO 17025 - Calibration procedures and requirements for laboratory competence

Aligning with these complementary standards ensures that measurement systems are robust, reliable, and suitable for modern petroleum industry requirements.

Keywords: petroleum measurement systems, pipe prover, flow meter calibration, sphere inspection, oil and gas standards, volumetric measurement, leak detection, calibration documentation, EN ISO 7278-2.

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 7278-2:2023/oprA1:2025
01-december-2025
Merilni sistemi za nafto - 2. del: Načrtovanje, kalibracija in delovanje merilnika cevi
- Dopolnilo 1 (ISO 7278-2:2022/DAmd1:2025)
Petroleum measurement systems - Part 2: Pipe prover design, calibration and operation
- Amendment 1 (ISO 7278-2:2022/DAmd1:2025)
Mineralölmesssysteme - Teil 2: Auslegung, Kalibrierung und Betrieb von
Rohrprüfgeräten - Änderung 1 (ISO 7278 2:2022/DAmd 1:2025)
Systèmes de mesurage des produits pétroliers - Partie 2: Conception, étalonnage et
fonctionnement des tubes étalons - Amendement 1 (ISO 7278-2:2022/DAmd 1:2025)
Ta slovenski standard je istoveten z: EN ISO 7278-2:2022/prA1:2025
ICS:
75.180.30 Oprema za merjenje Volumetric equipment and
prostornine in merjenje measurements
SIST EN ISO 7278-2:2023/oprA1:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN ISO 7278-2:2023/oprA1:2025

SIST EN ISO 7278-2:2023/oprA1:2025
DRAFT
Amendment
ISO 7278-2:2022/
DAM 1
ISO/TC 28/SC 2
Petroleum measurement systems —
Secretariat: BSI
Part 2:
Voting begins on:
Pipe prover design, calibration and
2025-10-01
operation
Voting terminates on:
2025-12-24
AMENDMENT 1
Systèmes de mesurage des produits pétroliers —
Partie 2: Conception, étalonnage et fonctionnement des tubes
étalons
AMENDEMENT 1
ICS: 75.180.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO 7278-2:2022/DAM 1:2025(en)

SIST EN ISO 7278-2:2023/oprA1:2025
DRAFT
ISO 7278-2:2022/DAM 1:2025(en)
Amendment
ISO 7278-2:2022/
DAM 1
ISO/TC 28/SC 2
Petroleum measurement systems —
Secretariat: BSI
Part 2:
Voting begins on:
Pipe prover design, calibration and
operation
Voting terminates on:
AMENDMENT 1
Systèmes de mesurage des produits pétroliers —
Partie 2: Conception, étalonnage et fonctionnement des tubes étalons
AMENDEMENT 1
ICS: 75.180.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document has not been edited by the ISO Central Secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO 7278-2:2022/DAM 1:2025(en)

ii
SIST EN ISO 7278-2:2023/oprA1:2025
ISO 7278-2:2022/DAM 1:2025(en)
Petroleum measurement systems —
Part 2:
Pipe prover design, calibration and operation
AMENDMENT 1
1) Clause 11.2: add a paragraph to the end of clause 11.2.
Prior to commencing the calibration, the system should be checked for leakage. If appropriate the operation
and leak checking of a four-way valve, or a seal leakage test of a piston prover, should be carried out. A
sphere displacer should be withdrawn safely for inspection (clause 13.3). When removed, a sphere can
be positioned on a clean dry and dirt-free surface in a location suitable for measurement to the required
accuracy. It can then be inspected for condition and inflation diameter measured (clause 6.5.4).
2) Clause 6.5.2: -Delete paras 8 to 11
3) Insert new clause 6.5.4
6.5.4  Sphere inspection and sizing
New and spheres which have been removed from a prover should be inspected in the same way. Removal of
a sphere and initial inspection should follow the guidance given in clause 13.3.
When ordering a new or
...