BS EN IEC 60953-3-2022 PDF

Full title and description

STB BS EN IEC 60953-3:2022 — Rules for steam turbine thermal acceptance tests — Part 3: Thermal performance verification tests of retrofitted steam turbines. This document is the 2022 edition of Part 3 in the IEC 60953 series and provides the supplementary rules used when assessing the thermal performance of steam turbines after hardware retrofits.

Abstract

This part of IEC 60953 establishes a Supplementary Standard for thermal verification tests of retrofitted steam turbines. It follows the general guidance of IEC 60953-0 while adding amendments and supplements specifically addressing guarantees, verification procedures and measurement uncertainty when a retrofit involves hardware changes to the turbine. The text is intended for use where the turbine equipment itself is modified; changes to other plant equipment (boiler, feedwater heaters, etc.) are outside its scope.

General information

• Status: Published / Definitive.
• Publication date: BS EN IEC edition released 31 October 2022 (base IEC edition circulated July 2022).
• Publisher: Published as BS (British adoption of EN IEC) / EN IEC derived from IEC (Technical Committee: TC 5 — Steam turbines).
• ICS / categories: 27.040 — Gas and steam turbines; Steam engines.
• Edition / version: 2022 (Edition 2.0 at IEC level, published as EN IEC/BS EN IEC 60953-3:2022).
• Number of pages: Approximately 104 pages (BS EN IEC published text).

Scope

This part provides rules for the preparation, execution, evaluation and comparison with guaranteed values of thermal performance verification tests following hardware retrofits to steam turbines. It specifies how to determine measurement uncertainties for verification tests and contains amendments to the reference procedures in IEC 60953-0 so that guarantees and retrofit-specific conditions can be assessed consistently. It applies only when the retrofit involves hardware changes to the turbine itself and does not cover retrofits limited to other plant equipment or cycle changes.

Key topics and requirements

• Supplementary rules for thermal performance verification of retrofitted steam turbines (retrofit code).
• Procedures for preparation and execution of acceptance/verification tests after hardware modification.
• Methods for calculation and comparison with guaranteed performance values.
• Guidance on measurement uncertainty and its evaluation in the context of retrofit tests.
• Clarifications on applicability: only turbine hardware retrofits are covered; cycle or other plant equipment modifications are excluded.
• Alignment with IEC 60953-0 reference procedures with retrofit-specific amendments.

Typical use and users

Used by turbine manufacturers, service organizations, test laboratories, plant owners/operators, independent verification bodies and commissioning engineers to plan, conduct and evaluate thermal acceptance/verification tests after turbine retrofitting. It is also referenced in contracts and guarantee clauses where post‑retrofit performance must be demonstrated.

Related standards

IEC 60953 series (notably IEC 60953-0 — Reference Standard for thermal acceptance tests), earlier editions of IEC/EN/BS EN 60953 parts, and national adoptions (EN/BS EN/EVS/UNE etc.) of the IEC text. The 2022 Part 3 revises and replaces the earlier 2001 edition of IEC 60953-3.

Keywords

steam turbine, thermal acceptance test, retrofit, performance verification, measurement uncertainty, IEC 60953, retrofit code, TC 5, acceptance testing

FAQ

Q: What is this standard?

A: It is Part 3 of the IEC/EN/BS EN 60953 series: a supplementary standard that sets out rules for thermal performance verification tests of steam turbines after hardware retrofits.

Q: What does it cover?

A: It covers procedures to prepare, perform and evaluate thermal verification tests on retrofitted turbines, how to compare measured results with guaranteed values, and how to assess measurement uncertainty for those tests. It does not cover retrofits limited to other plant equipment or cycle changes.

Q: Who typically uses it?

A: Turbine manufacturers, retrofit contractors, test houses, plant operators, commissioning engineers and contractual/quality personnel who need to verify post-retrofit thermal performance and validate guarantees.

Q: Is it current or superseded?

A: The 2022 edition is the current published edition for Part 3; it supersedes the earlier IEC 60953-3:2001 edition. The IEC base edition circulated in mid‑2022 and the EN/BS EN adoption was published in late 2022.

Q: Is it part of a series?

A: Yes — it is one part of the IEC 60953 series (Rules for steam turbine thermal acceptance tests). Relevant companion parts include IEC 60953-0 (reference rules and accuracy classes) and other parts addressing different test or turbine classes.

Q: What are the key keywords?

A: Steam turbine, retrofit, thermal acceptance test, performance verification, measurement uncertainty, IEC 60953, retrofit code, acceptance testing.