SAE J1737_201305

1 Scope
2 References
3 Background Information
   3.1 General Comments - This Procedure
   3.2 Other Measurement Techniques
   3.3 Measuring Steady-State Conditions
        3.3.1 Time to Reach Steady-State
        3.3.2 Determining Steady-State
   3.4 Test Conditions
        3.4.1 Temperature
        3.4.2 Type of Fuel
        3.4.3 Pressure
        3.4.4 Wall Thickness
        3.4.5 Construction of the Part
        3.4.6 Moisture Content
        3.4.7 Variation of Test Specimen
   3.5 Units of Measurement
        3.5.1 Types of Units of Measurement
        3.5.2 Cautions About Units of Measurement
4 Apparatus and Equipment
   4.1 Elements of Apparatus
        4.1.1 Inert Gas for Pressurizing Fuel
        4.1.2 Pressure Regulator and Gauge
        4.1.3 Fuel Container
        4.1.4 Heater for the Test Fuel
        4.1.5 Recirculation Pump and Regulator for Fuel
               Flow Rate
        4.1.6 Tubing to Route Test Fuel
        4.1.7 Test Cell
        4.1.8 Test Specimen-General
        4.1.9 Mounting Test Specimen
        4.1.10 Length Change Measurement
        4.1.11 Heating Mantle for Test Cell
        4.1.12 Carrier Gas for Fuel Vapors
        4.1.13 Tubing for Carrier Gas
        4.1.14 Pump and Flow Regulator for Carrier Gas
        4.1.15 Pressure Regulator
        4.1.16 Collection Device
        4.1.17 Activated Charcoal
   4.2 Other Equipment
        4.2.1 Balance
        4.2.2 Fuel Handling Items
        4.2.3 Tools
        4.2.4 Safety Items
5 Chemicals
   5.1 Fuel Mixtures
   5.2 Nitrogen (Dry)
   5.3 Activated Charcoal
6 Safety Equipment and Facilities
   6.1 Vapor Control Device
   6.2 Gloves
   6.3 Safety Glasses
   6.4 Temperature Controls
   6.5 Pressure Controls
7 Test Procedure
   7.1 Test Specimen Preparation
   7.2 Preconditioning Test Specimen
   7.3 Mounting Test Specimen
   7.4 Preparing Charcoal Canisters
        7.4.1 Charcoal Adsorptive Capacity
        7.4.2 Dry The Charcoal
        7.4.3 Charcoal Into The Canisters
        7.4.4 Weight The Canisters
        7.4.5 Attach Canisters to Apparatus
   7.5 Preparing Fuel Mixture
   7.6 Fuel Flow
   7.7 Set Test Temperature
        7.7.1 Typical Test Temperatures
        7.7.2 Record the Test Temperature
        7.7.3 Suggested Procedure for Using Temperatures Less
               than 60 degree C
   7.8 Pressure the Test Fuel
   7.9 Starting Test
   7.10 Conducting the Test
        7.10.1 First 8 Hours
        7.10.2 Weigh the Charcoal Canisters
   7.11 Shutting Down the Test Apparatus
8 Calculations
   8.1 Weight Gain
   8.2 Confirm Dimensions at End of Test
   8.3 Calculate Permeation Rate at End of Test
9 Reporting Results
   9.1 Units of Measurement
   9.2 Identifying Results
   9.3 Additional Information
10 Notes
   10.1 Marginal Indicia
Appendix A
   A.1 Calculation of Adsorptive Capacity of the Charcoal
        A.1.1 Test Preparation
        A.1.2 Test Procedure
        A.1.3 Adsorptive Capacity
  A.2 Determination of Adsorptive Efficiency of Canisters

Intends for the determination of the losses of hydrocarbon fluids, by permeation through component walls as well as through 'microleaks' at interfaces of assembled components while controlling temperature and pressure independently of each other.

This SAE Recommended Practice is intended for the determination of the losses of hydrocarbon fluids, by permeation through component walls as well as through \"microleaks\" at interfaces of assembled components while controlling temperature and pressure independently of each other. This is achieved in a recirculating system in which elements of a test fuel that permeate through the walls of a test specimen and migrate through the interfaces are transported by a controlled flow of dry nitrogen to a point where they are measured. That measurement point is a device, such as a canister containing activated charcoal or other means of collection or accumulation where the hydrocarbon losses are then measured by weight change or analyzed by some other suitable means.