UA-69298255-1 UA-69298255-2 ASME B31.3 Limitations Tubing Joints

ASME B31.3 Limitations Tubing Joints

September 21, 2017


Tubing joints are covered by para. 315, and include flared, flareless, and compression-type tube fittings. ASME B31.3 provides some listed tubing joints; however, many tubing joints used in process piping are proprietary fittings that are qualified as unlisted components. The following are the listed standards covering tubing joints:

  • SAE J513, Refrigeration Tube Fittings—General Specifications

  • SAE J514, Hydraulic Tube Fittings

These listed components are permitted for use in Normal Fluid Service, provided that they are used within the pressure-temperature limitations of the fittings and joint. They are required to be safeguarded when used under severe cyclic conditions; however, it is highly unlikely that this will occur, because it requires the tube joint to be at over 80% of the allowable displacement stress range. Unlisted tube fittings must be qualified in accordance with para. 304.7.2.




Engineering Consultant Services

Please reload

Rate UsDon’t love itNot greatGoodGreatLove itRate Us


3705 Fonda Way #18 Southeast Calgary, T2A 6G9


Bay area, California

Stay Connected

  • Facebook Social Icon
  • Twitter Social Icon
  • LinkedIn Social Icon
  • LinkedIn
  • yp-logo-original
  • Yelp Social Icon
  • Google Places Social Icon
  • Pinterest Social Icon