Flares for Tubing J533_201702

DOI: https://doi.org/10.4271/J533_201702

Issuing Committee: Hydraulic Tube Fittings Committee

Publisher: SAE International

Pages: 10

Rationale: The SAE J533 specification has been in use for over 50 years and has served the original equipment industry well. The flares defined in SAE J533 are still extensively used in the automotive industry, on industrial equipment and on specific applications by original equipment manufacturers. Some users find the basic description of the flare seat surface in the current standard somewhat lacking in details associated with key attributes and how they relate to the physical characteristics of the formed material. This revised document uses Geometric Dimensioning and Tolerancing (GD&T) to define the face of the flare sealing surface. The use of GD&T tolerancing based on the total runout of the flare surface allows for the use of check fixtures during production, which can improve the quality of the finished product. Additional tables were added to incorporate metric tube sizes and a depiction of an inspection gage example for checking total runout was added.