This standard is intended to establish uniform methods of testing SAE J844d tubing and fitting assemblies as used in automotive air brake systems. This standard also establishes minimum qualifications for tensile and pressure capabilities, vibrational durability under cyclic temperatures, serviceability, and fitting compatibility requirements. The specific tests and performance criteria applicable to the tubing are set forth in SAE J844d. Note: The test values contained in this performance standard are for test purposes only. For environmental and usage limitations see SAE J844d. Fittings – A type of fitting for use with SAE J844d nonmetallic tubing is included in SAE J246b, however, it is not intended to restrict or preclude the use of other designs of fittings that comply with this standard.