Wrought and Fabricated Butt-Welding Fittings for Low …
ASME B16.9. 4. SIZE . 4.1 The size of the fittings in Tables 1 through 6 are identified by the corresponding NPS. 5. MARKING . 5.1 Each fitting shall be marked as per SP-25 to show the following: a) Manufacturer's name or trademark . b) "CR" followed by the material identification symbol established for the respective grade in the appropriate