ASME B16.9 tolerances are critical to ensuring the interchangeability of fittings, the reliability of butt welding joints, and the safe and stable operation of piping systems in industries such as petroleum, chemical engineering, power generation, and aerospace. HT PIPE is a leading stockist and global exporter with over 16 years of expertise in international trade. We supply pipes, plates, round bars, and a comprehensive range of pipe fittings, flanges, and valves. Contact us now for free quotes and personalized product information.
ASME B16.9 tolerances
GENERAL NOTES:
(a) All dimensions are in millimeters.
(b) Tolerances are equal plus and minus except as noted.
NOTES:
(1) Out-of-round is the sum of absolute values of plus and minus tolerances.
(2) This tolerance may not apply in localized areas of formed fittings where increased wall thickness is required to meet design requirements of para. 2.2.
(3) The inside diameter and the nominal wall thicknesses at ends are to be specified by the purchaser.
(4) Unless otherwise specified by the purchaser, these tolerances apply to the nominal inside diameter, which equals the difference between the nominal outside diameter and twice the nominal wall thickness.
