ASME PTC 9 is the Performance Test Code for displacement compressors, vacuum pumps, and blowers. It provides the standard rules for conducting and reporting performance tests to determine the capacity and power consumption of these machines under specific conditions. Core Purpose and Scope
The primary goal of ASME PTC 9 is to provide a uniform procedure for testing displacement-type equipment. This ensures that results are accurate, reliable, and comparable across different manufacturers and facilities.
Equipment Covered: Rotary and reciprocating displacement compressors, blowers, and vacuum pumps.
Testing Parameters: Establishes methods for measuring pressure, temperature, and flow rates.
Calculation Methods: Includes mathematical formulas for computing test results and determining test uncertainty. Historical Context and Versions
While many modern industrial facilities now look to ASME PTC 13 for "wire-to-air" performance of blower systems, PTC 9 remains a foundational historical standard. Initial Issue: The code has roots dating back to 1915.
1970 Edition: A widely cited version titled "Displacement Compressors, Vacuum Pumps, and Blowers".
1979 Revision: An updated version that refined measurement methods for turbomachinery and manufactured goods. Key Sections of the Code
The document is typically organized into six main sections and several appendices to guide engineers through the testing process:
Object and Scope: Defines what the test intends to accomplish and the limits of the code.
Description and Definition of Terms: Ensures consistent terminology for technical variables.
Guiding Principles: Outline the preparation and general conduct required for a valid test.
Instruments and Methods of Measurement: Details the required hardware and calibration standards.
Computation of Results: Provides the specific equations for efficiency and capacity.
Report of Test: Standardizes how the final data should be presented to stakeholders. Where to Find the Official PDF
For professional use, it is critical to use authorized versions to ensure compliance with modern safety and engineering standards.
Official Purchase: The latest versions and historical archives are available directly from the ASME Standards Store.
Reference Previews: Digital libraries like Scribd often host legacy versions (e.g., 1970 or 1979) for academic or research reference.
If you are looking for a specific year's version or need help calculating a test uncertainty based on the PTC 9 formulas, let me know and I can provide more technical details. PTC 9 - Displacement Compressors, Vacuum Pumps and Blowers asme ptc 9 pdf best
ASME PTC 9 Performance Test Code for Displacement Compressors, Vacuum Pumps, and Blowers . First established in 1915, the current version is ASME PTC 9-1970 (reaffirmed in 1997)
, though it is now largely considered a historical reference as newer standards like ASME PTC 13 have taken its place for modern industrial applications. The American Society of Mechanical Engineers - ASME Core Objectives and Scope
The primary goal of PTC 9 is to provide uniform rules for testing reciprocating or rotating displacement machines to determine:
in relation to speed, inlet pressure, and discharge pressure. Power Consumption in relation to speed, capacity, and intercooling. Adjustments
: Rules for reconciling test results with specified operating conditions. The American Society of Mechanical Engineers - ASME Standard Structure ASME PTC 9 PDF includes the following sections: Intertek Inform Object and Scope
: Defines the types of machines covered (displacement-type only). Definitions
: Standardizes terms for pressure, temperature, and volume flow. Guiding Principles : Mandatory requirements for proper test execution. Instruments and Measurement
: Specifications for sensors and measurement locations to minimize error from pulsating flow. Computation of Results
: Formulas for calculating performance and measurement uncertainty. Appendices
: Detailed properties of gases, gas mixtures, and report formats. The American Society of Mechanical Engineers - ASME Critical Limitations & Modern Replacements
While once the definitive standard, PTC 9 has several gaps for modern equipment: Wire-to-Air Efficiency
: PTC 9 focuses primarily on the bare compressor stage rather than the complete "packaged" system (including motors and drives). Superseded Status : For many modern procurement contracts, ASME PTC 13
is preferred because it addresses integrated blower packages and "wire-to-air" power. International Usage
has largely replaced PTC 9 as the global standard for displacement compressor testing. Best Practices for Use
If you must use PTC 9 for a legacy system or specific contract: Agreement Pre-Test
: Parties must agree on instrumentation and alternate test methods before starting, as accurate measurement of pulsating flow is difficult. Measurement Accuracy : Ensure pressure gauges are calibrated within 1.5 – 4x
the expected range and maintain temperatures above the Minimum Design Metal Temperature (MDMT). Documentation
: Record every reading and signature. If a value isn't documented, it is legally considered not to have happened during an acceptance test. from the code or trying to decide which standard to cite in a contract? Displacement Compressors Vacuum Pumps and Blowers | 1970 ASME PTC 9 is the Performance Test Code
ASME PTC 9 (Displacement Compressors, Vacuum Pumps and Blowers) is a historical performance test code that provides uniform rules for conducting and reporting tests on displacement-type machinery. While it was last reaffirmed in 1997, it has largely been superseded in modern industrial practice by ASME PTC 13 and ISO 1217. Core Features of ASME PTC 9
The code established mandatory procedures for determining machine performance under specific operating conditions:
Capacity Assessment: Precise rules to measure capacity relative to speed, inlet pressure, and discharge pressure.
Power Consumption: Standardized methods to calculate power use in relation to speed, capacity, and intercooling.
Test Reconciliation: Specialized rules for adjusting raw test results to reconcile them with specified or "guaranteed" operating conditions.
Measurement Standards: Definitions for required instruments and mandatory computational formulas (Section 5) to ensure results comply with ASME standards.
Pulsation Management: Guidelines for testing compressors in environments where gas discharge is uniform and free from the pulsations inherent in displacement machinery. Current Status and Availability
Although the code is technically "inactive" or "superseded," it remains relevant for historical reference or legacy equipment testing:
Latest Edition: The final version is the 1970 edition, which was reaffirmed in 1997 (PTC 9-1970 R1997).
Where to Obtain: Official digital or printed copies are available through the ASME Standards Catalog or authorized distributors like Accuris (formerly IHS Markit).
Transition to PTC 13: For new installations, particularly "wire-to-air" blower systems, ASME PTC 13 is now the preferred standard as it incorporates modern advancements that PTC 9 did not address. If you're looking to purchase this standard, Displacement Compressors Vacuum Pumps and Blowers | 1970
ASME PTC 9 (Performance Test Code 9) is a historical standard for testing Displacement Compressors, Vacuum Pumps, and Blowers . It is important to note that ASME PTC 9 is currently an
and withdrawn specification; it was last officially issued as ASME PTC 9-1970
(reaffirmed in 1979) and is now maintained for historical reference only.
For current testing requirements, users typically transition to newer standards: ASME PTC 13
(Wire-to-Air Performance Test Code for Blower Systems) is the modern replacement for packaged blower systems. ASME PTC 10
remains the active standard for axial and centrifugal compressors. Where to Access ASME PTC 9
Since it is no longer an active American National Standard, official "best" copies are primarily found through digital archives or professional society libraries: Official ASME Store : You can purchase the historical version of not software. However
ASME PTC 9 - Displacement Compressors, Vacuum Pumps and Blowers directly from the Historical Archives : Document hosting platforms like often have historical PDFs such as ASME PTC 9-1970 ASME PTC 9-1979 available for viewing or download with a subscription. The American Society of Mechanical Engineers - ASME Key Specifications of PTC 9 Object and Scope
: Rules for measuring pressure, temperature, and power input of displacement-type compressors and blowers. Driving Elements
: Includes procedures for tests where the driving element is an electric motor. Historical Timeline
: Originally issued in 1915, with significant revisions in 1954 and 1970. ASME PTC 13 Asme PTC 9 | PDF | Law | Technology & Engineering - Scribd
ASME PTC 9 is the official Performance Test Code Displacement Compressors, Vacuum Pumps, and Blowers
. It provides a standardized framework for conducting performance tests to determine critical operational data like capacity and power consumption. The American Society of Mechanical Engineers - ASME Core Review of ASME PTC 9
The code is designed to create a "level playing field" between manufacturers and equipment owners by ensuring that testing is accurate, repeatable, and legally defensible in contracts. The American Society of Mechanical Engineers - ASME Primary Purpose
: Establishes rules for testing to determine capacity (relative to speed and pressure) and power consumption (relative to intercooling and inlet conditions). Application Scope
: applies to units operating under conditions that allow for steady discharge into the atmosphere, pipelines, or receivers without heavy pulsations. Key Advantage
: It allows users to reconcile actual test results with specified design operating conditions, which is essential for verifying performance guarantees in purchase contracts. The American Society of Mechanical Engineers - ASME Technical Components Focus Area Guiding Principles
Standardizes the planning, preparation, and reporting of the test. Instrumentation
References supplemental standards (like PTC 19 series) for precise pressure and temperature measurement. Adjustment Rules
Provides mathematical methods to adjust results for variations in inlet pressure or temperature compared to design specs. Where to Find the Best PDF
For professional and legal compliance, it is critical to use the latest official version from the ASME Standards Store . While document repositories like
may host older versions (such as the 1970 or 1979 editions), these may lack recent errata or reaffirmations. The American Society of Mechanical Engineers - ASME PTC 9 - Displacement Compressors, Vacuum Pumps and Blowers
ASME periodically issues errata and interpretations. The "best" PDF alone is insufficient if it lacks these updates. Sign up for ASME standards alerts and append a change log to your digital copy.
Once you’ve secured the best ASME PTC 9 PDF, prioritize these critical sections:
A: No. ASME sells the code only, not software. However, the best PDF includes clearly documented equations so you can build your own calculation tool.
