Browse Topic: Leak tests

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Optical Window for Far-IR Instruments Using Thin TOPAS® FilmTBMG-358091/1/2020
Most flight instruments that use cryogenics or non-cryogenics require physical isolation of their internal instruments (sensors, detectors, spectrometers) from the external environment. This isolating window film also needs to be transparent in the operational frequency of the internal instruments to detect electromagnetic waves. As such, the film needs to have the necessary strength to hold the vacuum pull and provide a low transmission loss.
SAE Truck & Off-Highway Engineering: December 201919TOFHP1212/5/2019
Heavy-duty engine design What are the most significant factors influencing the way engine developers approach near-term design and development cycles? Two experts provide their insights from recent programs. Reducing winter range loss for electric trucks Researchers at the Austrian Institute of Technology have developed an air exchange system that's capable of reducing heat load by 37% in real-world tests. Narrower focus, bigger payoff Design teams are targeting focused markets for their commercial electric-vehicle programs to combat challenges like range and infrastructure. Removing complexity for autonomous trucks Narrowing the operating domains for driverless commercial vehicles reduces the requirements of autonomous technology and speeds time to market. Plastics innovations 2019 The 49th annual SPE Automotive Awards highlight the ongoing benefits of lightweight polymers and composites. Editorial Hop on the hydrogen highway Leak testing of commercial-vehicle AC systems critical as move to HFO refrigerants looms Akasol packs industry-leading energy density into new battery design Mahle and partners develop super-efficient natural-gas engine for stationary power How battery technology will drive truck electrification Platinum nanoparticles for fuel-cell catalysts may cut cost Caterpillar launches next-gen mini hydraulic excavator, skid steer and compact track loaders Q&A Dan Williams shares how ZF will help advance ADAS and autonomy in 2020 and beyond
Component Leak Test ApparatusTBMG-281941/1/2018
A component leak test apparatus investigates the performance of fittings at low temperature and/or high pressure. Its performance was quantified by measuring the ability to hold cold pressurized gaseous helium (He) with a He mass spectrometer. The apparatus was developed to certify small fittings for use with He at high pressure and cryogenic temperatures (< -238 °F) using current torque values.
Leak Test Solution Liquid Oxygen CompatibleAMS3159G (Current)4/11/2017
This specification covers a liquid oxygen compatible gas-leak detecting compound in the form of a liquid.
AMS B Finishes Processes and Fluids Committee
Ensuring Your Medical Device Meets Sterilization Standards Throughout the Supply ChainTBMG-227879/1/2015
Considering the complex science and research that goes into developing medical devices, it is important to take time to consider the detailed process and requirements in place for safely delivering the product to the consumer.
Leak Test Solution Liquid Oxygen CompatibleAMS3159F (Historical)10/3/2011
This specification covers a liquid oxygen compatible gas-leak detecting compound in the form of a liquid.
AMS B Finishes Processes and Fluids Committee
LEAK TEST SOLUTION Liquid Oxygen CompatibleAMS3159D (Historical)8/9/2011
This specification covers a gas-leak detecting compound compatible with liquid oxygen in the form of a liquid.
AMS B Finishes Processes and Fluids Committee
Statistical Experimentation of Fuel System O-Ring Interface2011-01-05144/12/2011
O-rings are regularly utilized as a means of creating a seal between two components. Since the introduction of mini-concentric fuel pressure regulators, several issues have arisen related to assembly. In many cases, severe leaks are masked by lubricants used to aid in assembly. A lubricant is required which will not mask such leaks. The purpose of this study is to determine the impact on assembly between alcohol and oil based lubricants and to determine the optimum assembly parameters when using alcohol lubricants. Several variables were identified as being major contributors to the assembly process. A total of 6 variables were chosen to be examined as well as 2 noise factors. Each variable, or factor, was assigned several levels for this experiment. Several measurables were defined outputs from the experiment. To maximize the efficiency of testing, an orthogonal array was used to structure the experiment. An L18 orthogonal array was chosen composed of 72 trials. When conducting a trial, the CNC press was used to control insertion rate. Insertion force data was collected electronically by the CNC press controller. After assembly each sample was leak tested using an air pressure test. Samples were then disassembled to search for and examined O-ring damage. Upon completing the study, only one assembly process parameter was found to be significant for successful assembly. The dominant process parameter was found to be the assembly lubricant with a 70% alcohol based 30% water mixture being the optimum.
Vinarcik, Edward John
Development of Leak Tightness Specifications for Automotive Fuel System Components as Required to meet Hydrocarbon Emission Regulations using the Equivalent Channel Concept and its Implementation Method for Production Leak Testing2010-01-11044/12/2010
Determination of appropriate leak tightness specifications for production leak testing of fuel system components has challenged the automotive industry for many years. This process has become more complicated as hydrocarbon emission regulations have been lowered (US-EPA, CARB LEVII, Euro5, etc.). Application of the equivalent channel (EC) concept can significantly simplify the process of determining leak tightness specifications. This paper describes the test procedure and results of a hydrocarbon emission study designed to define a critical geometry (known as Equivalent Channel-EC) that will plug after exposure to gasoline, resulting in no HC emission due to leaks during Vehicle SHED (Sealed Housing for Evaporative Determination) tests. This critical geometry will stop any measurable hydrocarbon leakage after enough time has elapsed for the channel to plug. Micro-channels of several diameters and lengths were tested in a Micro-SHED at 40 degrees Celsius for 24 hours. SHED tests were performed on EC's with direct liquid gasoline contact at 345 kPa-Gage (50 psig). These test parameters were selected to match typical automotive operating conditions of gasoline fuel system components. Gasoline used was per EPA Tier 2 EEE specification as required for standard emission tests. Nitrogen and flow rates of all micro-channels were measured to establish minimum production leak test tightness specifications required to ensure defects larger than the critical geometry (Equivalent Channel) are detected during a leak test. EC flow rates were measured at several pressures to facilitate establishing a flow curve. The flow curves can be used to calculate flow rate at any test pressure between 68.9 and 1034.2 kPa-Gage (10 and 150 psig). This method of establishing leak tightness specifications effectively ensures no hydrocarbon Vehicle SHED contribution due to component leaks as is independent of specific production leak test methods and test parameters.
Bishop, Larry, Sagi, Hemi
Ultrasound Techniques for Leak Detection2009-01-21595/19/2009
Leak detection of vehicle cabin interiors is an important quality inspection phase that typically has been handled with various time consuming, or potentially product damaging techniques. Leak detection in tank or pressure vessel applications is almost always a concern for gas or fluid containment in vehicles and in many other industries. Numerous techniques exist for the detection of leaks in these and other types of structures. When testing is required in a production environment, often the speed of leak detection is very important if all samples must be tested. The use of several ultrasound based methods for leak detection in vehicle cabins and pressure vessel applications is presented here. Ultrasound waves are typically classified as having spectral content greater than 20 kHz. In the case of leak detection in a production environment, frequently the ultrasonic spectrum is largely free from background noise content that dominates the audible spectrum. The method for the response measurement of ultrasonic signals presented here is with the implementation of high frequency microphones. The excitation methods presented here are an active method utilizing an ultrasonic emitter, a passive method relying on the passing of air through leak locations, and a vibro-acoustic method utilizing a small electro-dynamic shaker. The methods presented here have been tested for the existence of leaks in some structures, but have not been tested in this paper for the existence flaws and defects that may potentially lead to leaks in some structures after prolonged use.
Moon, C., Brown, W. C., Mellen, S., Frenz, E., Pickering, D. J.
Gas-Based Production Leak Testing Techniques For Automotive Components2006-01-14084/3/2006
This paper outlines the methodology to 1) determine what leak rate specification is appropriate for a given automotive component, 2) arrive at the gas-based leak test method that is best suited for the situation, and 3) perform the requisite calculations to confirm the choice of test method. Also provided are summary tables (based upon actual industry experience) relating component type, typical leak rate specification, test method used, and (production) sensitivity range of the method utilized.
Lange, David A.
Pressure Testing, Gaseous Media, 40 PsiAMS2604G (Current)2/10/2004
This specification provides requirements and procedures for gas-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Gaseous Media 10 PsiAMS2601G (Current)2/10/2004
This specification provides requirements and procedures for gas-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Gaseous Media, 70 KpaMAM2601C (Current)4/24/2003
This specification provides requirements and procedures for gas-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Gaseous Media, 275 KpaMAM2604C (Current)4/24/2003
This specification provides requirements and procedures for gas-pressure leak testing of parts. AMS 2604 is the inch/pound version of this MAM.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 1000 PsiAMS2620E (Current)11/28/2001
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 200 PsiAMS2616E (Current)11/28/2001
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 17.5 MpaMAM2625C (Current)11/28/2001
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts. AMS 2625 is the inch/pound version of this MAM.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 1380 KpaMAM2616C (Current)11/28/2001
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 6895 KpaMAM2620C (Current)11/28/2001
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 2500 PsiAMS2625E (Current)11/28/2001
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, Pressure as Specified, MetricMAM2615B (Current)11/28/2001
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
LEAK TEST SOLUTION Liquid Oxygen CompatibleAMS3159E (Historical)11/1/1996
This specification covers a liquid oxygen compatible gas-leak detecting compound in the form of a liquid.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, Pressure as Specified, MetricMAM2615A (Historical)5/1/1995
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Gaseous Media, 275 KpaMAM2604B (Historical)7/1/1994
This specification provides requirements and procedures for gas-pressure leak testing of parts. AMS 2604 is the inch/pound version of this MAM.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Gaseous Media, 70 KpaMAM2601B (Historical)5/1/1994
This specification provides requirements and procedures for gas-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 17.5 MPaMAM2625B (Historical)10/1/1993
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts. AMS 2625 is the inch/pound version of this MAM.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 1380 kPaMAM2616B (Historical)10/1/1993
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 6895 kPaMAM2620B (Historical)10/1/1993
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 6895 KpaMAM2620A (Historical)4/1/1988
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Gaseous Media, 70 KpaMAM2601A (Historical)4/1/1988
This specification provides requirements and procedures for gas-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 1380 KpaMAM2616A (Historical)4/1/1988
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Gaseous Media, 275 KpaMAM2604A (Historical)4/1/1988
This specification provides requirements and procedures for gas-pressure leak testing of parts. AMS 2604 is the inch/pound version of this MAM.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 17.5 MpaMAM2625A (Historical)4/1/1988
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts. AMS 2625 is the inch/pound version of this MAM.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, Pressure as SpecifiedAMS2615C (Historical)1/1/1985
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, Pressure as Specified, MetricMAM2615 (Historical)1/1/1985
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Gaseous Media 10 PsiAMS2601D (Historical)4/1/1982
This specification provides requirements and procedures for gas-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 2500 PsiAMS2625B (Historical)4/1/1982
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 6895 KpaMAM2620 (Historical)4/1/1982
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Gaseous Media, 70 KpaMAM2601 (Historical)4/1/1982
This specification provides requirements and procedures for gas-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Gaseous Media, 275 KpaMAM2604 (Historical)4/1/1982
This specification provides requirements and procedures for gas-pressure leak testing of parts. AMS 2604 is the inch/pound version of this MAM.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 1380 KpaMAM2616 (Historical)4/1/1982
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 1000 PsiAMS2620B (Historical)4/1/1982
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 200 PsiAMS2616B (Historical)4/1/1982
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 17.5 MpaMAM2625 (Historical)4/1/1982
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts. AMS 2625 is the inch/pound version of this MAM.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, Pressure as SpecifiedAMS2615B (Historical)1/1/1977
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Gaseous Media 10 PsiAMS2601C (Historical)6/1/1975
This specification provides requirements and procedures for gas-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 2500 PsiAMS2625A (Historical)12/1/1974
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, Pressure as SpecifiedAMS2615A (Historical)12/1/1974
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
Pressure Testing, Hydraulic, 1000 PsiAMS2620A (Historical)12/1/1974
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts.
AMS B Finishes Processes and Fluids Committee
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