ASME PTC 24-1976 (1982) PDF

Full title and description

ASME PTC 24-1976 (R1982) — Ejectors. Standard Test Code providing directions and rules for conducting and reporting performance tests on single- or multi-stage ejector units, primarily intended for steam-driven ejectors but applicable to other motive fluids with known properties.

Abstract

PTC 24 establishes accepted procedures, required measurements, and reporting conventions to determine ejector capacity and performance (including capacity vs. suction pressure and discharge pressure behavior), motive-fluid flow rates under specified pressure/temperature conditions, and ejector stability (breakdown and recovery characteristics). The code addresses tests with gas or vapor suction fluids and includes provisions for mixtures when components can be separately measured. It emphasizes that condensable motive fluids (e.g., steam) must be dry for the tests described.

General information

• Status: Active / placed on stabilized maintenance (reaffirmed 1982).
• Publication date: 1976 (reaffirmed 1982).
• Publisher: American Society of Mechanical Engineers (ASME).
• ICS / categories: Engineering — Fluid machinery; Test codes and performance measurement (ASME PTC series).
• Edition / version: ASME PTC 24-1976, reaffirmed (R1982).
• Number of pages: Approximately 27–34 pages depending on publisher/format (commonly listed as 27 pages in reseller catalogs; some copies list 34 pages).

Scope

The standard covers test procedures and reporting requirements for performance evaluation of ejectors (jet pumps). It specifies instrumentation, test conditions, measurement methods, and data-reporting formats required to determine capacity relative to suction pressure, discharge pressure relationships, motive-fluid flow rates for stipulated pressure/temperature, and stability characteristics (including breakdown and recovery). While directed primarily at steam motive fluids, the methods may be applied to other motive fluids whose physical properties are well known; procedures are included for tests using air, water vapor, gases, and measurable gas mixtures.

Key topics and requirements

• Definition of test objectives: capacity vs. suction pressure, discharge vs. suction pressure, motive-fluid flow characterization, and ejector stability measurement.
• Instrumentation and measurement accuracy requirements for pressures, temperatures, and flow rates appropriate to ejector testing.
• Test procedures for single- and multi-stage ejector units, including setup, conditioning, and stepwise data collection.
• Requirements and guidance when motive fluid is steam or other condensable vapors (dryness requirement).
• Reporting format and tabulation of results to ensure repeatability and comparability of performance data.

Typical use and users

Used by test laboratories, OEMs (ejector/jet-pump manufacturers), plant performance engineers (power plants, chemical plants, HVAC and process industries), consulting engineers, and researchers conducting performance validation, acceptance testing, or R&D on ejector devices. The standard provides a common protocol for manufacturer guarantees, acceptance criteria, and comparative testing.

Related standards

Other ASME PTC documents and pump/flow measurement codes are commonly referenced alongside PTC 24 for broader test and measurement context (for example, related PTC series items addressing pumps, flow meters, and test instrumentation). Catalog listings of ASME PTC publications show PTC 24 grouped with other PTC titles in reseller and standards indexes.

Keywords

ejector; jet pump; steam ejector; motive fluid; performance test code; PTC 24; capacity curve; suction pressure; discharge pressure; stability; test procedures.

FAQ

Q: What is this standard?

A: ASME PTC 24-1976 (R1982) is the Performance Test Code that defines procedures and reporting requirements for testing the performance of ejectors (jet pumps), with emphasis on steam-driven units.

Q: What does it cover?

A: It covers test objectives, required measurements (pressures, temperatures, flow rates), instrumentation accuracy, step-by-step test procedures for single- and multi-stage ejectors, special provisions for condensable motive fluids (steam must be dry), and standardized reporting formats.

Q: Who typically uses it?

A: Test labs, ejector manufacturers, plant and process engineers (power, chemical, HVAC), consultants, and researchers who need an industry-accepted protocol for performance verification and comparative testing.

Q: Is it current or superseded?

A: The document is the 1976 edition reaffirmed in 1982 (listed as PTC 24-1976 (R1982)). ASME indicates this product has been placed on stabilized maintenance (requests for change are considered through ASME procedures). Users should confirm status with ASME for any later revisions.

Q: Is it part of a series?

A: Yes — PTC 24 is part of the ASME PTC (Performance Test Code) family of standards, which cover test procedures for a range of rotating and fluid machinery and measurement systems.

Q: What are the key keywords?

A: Ejector, jet pump, steam ejector, motive fluid, performance test code (PTC), capacity curve, suction pressure, discharge pressure, stability, test procedure.