ISO 20816-2:2017/Amd 1:2024

Overview

ISO 20816-2:2017/Amd 1:2024 is an important amendment to the international standard covering mechanical vibration measurement and evaluation for land-based gas turbines, steam turbines, and generators with power outputs exceeding 40 MW. This document specifically addresses machines with fluid-film bearings operating at rated speeds of 1,500 r/min, 1,800 r/min, 3,000 r/min, and 3,600 r/min. The amendment updates the scope and references, ensuring best practices for monitoring the vibration levels of critical large-scale rotating machinery are current and comprehensive.

The ISO 20816 series, developed by ISO Technical Committee ISO/TC 108 and its subcommittee SC 2, focuses on ensuring reliability and performance of heavy industrial machinery through standardized vibration assessment. This latest amendment highlights the need for precise evaluation criteria applicable not just to turbines and generators but also to ancillary shaftline components such as synchronizing clutches, exciters, and flywheel masses.

Key Topics

• Vibration Measurement Criteria
  The standard provides clear criteria for vibration levels to be measured and evaluated in large land-based turbines and generators. It emphasizes the interpretation of vibration data to ensure machinery operates within safe limits to prevent failure.

• Application to Shaftline Components
  Beyond turbines and generators, the document includes guidelines for related components like synchronizing clutches and exciters, underscoring the holistic approach to vibration monitoring across the entire shaftline.

• Rated Speeds and Power Thresholds
  The amendment maintains focus on machines rated at 1,500 r/min, 1,800 r/min, 3,000 r/min, and 3,600 r/min, with power outputs greater than 40 MW, ensuring targeted standards for large, critical equipment.

• Scope Clarifications
  It delineates machinery not covered under this part of ISO 20816, directing attention to ISO 20816-3 and ISO 20816-4 for machines with lower power ratings or different speed ranges, specifically smaller turbines and generators below 40 MW and machines operating at other speeds.

• Updated References and Bibliography
  The amendment deletes certain outdated references and incorporates the latest related parts of ISO 20816, ensuring users have access to the full suite of standards relevant to mechanical vibration in industrial machinery.

Practical Applications

• Power Generation Sector
  Essential for power plant operations, this standard guides maintenance teams in monitoring vibration levels of large gas and steam turbines as well as generators, enhancing operational reliability and lifespan.

• Condition Monitoring Programs
  Integrated into predictive maintenance and condition monitoring practices, the guidelines enable early detection of mechanical faults, reducing the risk of unplanned downtime.

• Engineering and Design
  Manufacturers and engineers use the standard to design and test large rotating machinery to comply with internationally recognized vibration limits, ensuring safety and performance.

• Plant Safety and Compliance
  Compliance with ISO 20816-2:2017/Amd 1 helps organizations meet regulatory and safety requirements related to mechanical vibration, contributing to safer working environments.

Related Standards

• ISO 20816-3
  Focuses on industrial machinery with power ratings above 15 kW and operating speeds between 120 r/min and 30,000 r/min, covering smaller turbines and generators outside the scope of Part 2.

• ISO 20816-4
  Addresses gas turbines above 3 MW with fluid-film bearings but with different operational parameters, supplementing vibration measurement protocols for a broader range of equipment.

• ISO 10816 Series
  Provides foundational guidance on measurement and evaluation of vibration across various machine types and sizes, forming the basis for specific detailed standards like ISO 20816.

Keywords: ISO 20816-2:2017/Amd 1:2024, mechanical vibration, land-based gas turbines, steam turbines, generators, fluid-film bearings, vibration measurement, vibration evaluation, turbine vibration standards, power plant machinery monitoring, condition monitoring, industrial machinery vibration.