1、FORD WORLDWIDE FASTENER STANDARDDate: 1994-08-01Engineering Standards & 1 of 1 Printed copies are uncontrolled .Systems Engineering (ESSE)WM 950Air Leakage Test - Dryseal Taper Threads in Accordance with SAE J476a1. SCOPE.This standard covers the requirements for air leakage testing 1/8, 1/4, 3/8, 1
2、/2, and 3/4 tapered drysealpipe threads produced in accordance with SAE J476a before coating.1.1 REFERENCES.ASTM E432 - Guide for the selection of a Leak Testing Method.SAE J476A - Dryseal pipe threads.2. LEAKAGE TEST.The component shall be screwed into a mating tapered mild steel female thread to S
3、AE J476a in a suitabletest rig to the torque specified in Table 1 and a pressure of 4 bar applied to the joint. The leakage rateshall not exceed 1 cubic centimeter of air per minute.NOTE: The test equipment and the method of testing is at the discretion of the manufacturer provided hecan demonstrate
4、 that the results can be equated to an air leakage rate. A guide to the selection of amethod by which leakage is measured can be found in ASTM E432.A mass spectrometer helium detector shall be used for referee purposes.Table 1.Dryseal Thread Size Tightening Torque Nm +/- 10%1/81/43/81/23/42030354050
