If you obtain the official ASME PTC 19.11 PDF, you will find that the document is structured around three core components: sampling, conditioning, and analysis. Here is what the standard details.
Use the correct edition (latest is ASME PTC 19.11-2019). Apply it during test planning, not after sampling goes wrong.
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ASME PTC 19.11, "Steam and Water Sampling, Conditioning, and Analysis in the Power Cycle," is the definitive technical guide for ensuring water and steam purity, preventing equipment failure through standardized sampling procedures. The standard outlines engineering requirements for isokinetic sampling and conditioning to maintain sample integrity, crucial for protecting high-pressure assets from corrosion and contamination. You can find the official technical manual at ASME.
ASME PTC 19.11, "Steam and Water Sampling, Conditioning, and Analysis in the Power Cycle," mandates methods and hardware for obtaining representative samples of steam and water to prevent corrosion, deposition, and turbine damage in power plants. The standard details requirements for isokinetic sampling nozzles, sample conditioning for pressure and temperature, and online monitoring of chemical parameters like cation conductivity and pH to ensure high-purity water. You can find more information about ASME codes on the American Society of Mechanical Engineers website.
ASME PTC 19.11, titled "Steam and Water Sampling, Conditioning, and Analysis in the Power Cycle," is the definitive industry standard for ensuring the chemical purity of water and steam in thermal power generation. For engineers, plant operators, and chemists, this code provides the technical blueprint for designing and operating Steam and Water Analysis Systems (SWAS). What is ASME PTC 19.11?
Part of the broader ASME Performance Test Codes (PTC), this standard (specifically the latest ASME PTC 19.11-2008 version, reaffirmed in 2018) dictates how to extract representative samples from high-pressure, high-temperature power plant cycles. Asme Ptc 19.11 Pdf
Its primary goal is to ensure that measurements for parameters like pH, conductivity, silica, and sodium are accurate enough for performance testing and long-term asset protection. Core Components of the Standard
The code is divided into several critical technical areas to eliminate measurement error: ASME PTC 19.11-2008(R2018) - 한국표준정보망
ASME PTC 19.11-2008(R2018) Steam and Water Sampling, Conditioning, and Analysis in the Power Cycle (PTC 19.11 - 2008) 한국표준정보망(KSSN) ASME PTC 19.11: Steam & Water Analysis | PDF - Scribd
The ASME PTC 19.11 is a performance test code developed by the American Society of Mechanical Engineers (ASME) that provides standardized procedures for the sampling, conditioning, and analysis of steam and water within a power cycle. Core Purpose and Scope
The primary objective of this code is to ensure that the water and steam used in thermal power generation meet specific purity and quality standards. This is critical for:
Performance Testing: Ensuring contamination is below maximum specified limits before conducting turbine or condenser tests. If you obtain the official ASME PTC 19
Continuous Monitoring: Providing guidance for the design and operation of sampling systems for routine power plant chemistry monitoring.
Asset Protection: Preventing corrosion and scale buildup in critical components like boilers and turbines. Key Content Areas
According to the ASME Standards Store, the document typically covers four major stages:
Sample Selection: Identifying the correct points in the power cycle to extract representative samples.
Collection and Conditioning: Methods for obtaining samples and adjusting their temperature or pressure to a state suitable for analysis.
Analysis: Specifying the instrumentation and laboratory methods used to test boiler makeup, feedwater, and condensate. ASME PTC 19
Data Interpretation: Guidelines for interpreting results to maintain optimal cycle chemistry. Available Versions and Formats
The code has evolved through several iterations to keep pace with advancing technology: ASME PTC 19.11-2008 (R2018): The most current version.
ASME PTC 19.11-1997: A significant previous version that introduced modernized sampling flow formats.
Availability: It can be purchased as a digital PDF or printed book directly from the Official ASME Website or authorized distributors like the ANSI Webstore. Use in Power Plants
PTC 19.11 - Steam and Water Sampling, Conditioning ... - ASME
Corrosive agents like dissolved oxygen and low pH can thin boiler tubes within months. The sampling and analysis protocols in PTC 19.11 provide early warning of such conditions.
For large power plants or O&G companies, your engineering department likely has a corporate subscription. Contact your document control manager or QA department to request a copy of the current revision.