ASME B16.9 pdf free download
ASME B16.9-2003 pdf free download.FACTORY-MADE WROUGHT BUTTWELDING FITTINGS.
This Standard covers overall dimensions, tolerances, ratings, testing, and markings for wrought factory-made buttwelding fttings in sizes NPS through 48 (DN 15 through 1200).
1.2 Special Fttings Fittings may be made to special dimensions, sizes, shapes, and tolerances by agreement between the manu- facturer and the purchaser.
1.3 Fabricated fltngs Fabricated laterals and other ittings employing cir- cumferential or intersection welds are considered pipe fabrication and are not within the scope of this Standard. Fabricated lap joint stub ends are exempt from the above restrictions, provided they meet all the require- ments of the applicable ASTM material specification listed in para. 5.
1.4 Standard Units The values stated in either metric or U.S. customary units are to be regarded separately as standard. Within the text, the US. customary units are shown in parenthe- ses. The values stated in each system are not exact equiv- alents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this Standard. The designation for size is NPS for both metric and customary dimensioned fttings. Fitting pressure rating is associated with the connecting wall thickness of pipe of equivalent size and material.
1.5 References 1.5.1 Referenced St Indards. Standards and specifica- tions adopted by reference in this Standard are shown in Mandatory Appendix I. It is not considered practical to identify the specific edition of each standard and specification in the individual references. Instead, the specific edition reference is identified in Mandatory Appendix I A product made in conformance with a prior edition of referenced standards and in all other respects conformning to this Standard will be considered to be in conformance.
1.5.2 Codes and Req yulations. A ftting used under the jurisdiction of the ASME Boiler and Pressure Vessel Code, the ASME Code for Pressure Piping or a govem- mental regulation is subject to any limitation of that code or regulation. This includes any maximum temperature limitation, or rule goverming the use of a material at low temperature.
1.6 Serice Conditions Criteria for selection of ftting types and materials suitable for particular fluid service are not within the scope of this Standard.
1.7 Welding Installation welding requirements are outside the scope of this Standard. 1.8 Quality Systems Nonmandatory requirements relating to the ftting manufacturer’s Quality System Program are described in Nonmandatory Appendix A.
1.9 Convention For the purpose of determining conformance with this Standard, the convention for fixing significant digits where limits (maximum or minimum values) are speci- fied shall be rounded off as defined in ASTM E 29. This requires that an observed or calculated value shall be rounded off to the nearest unit in the last righthand digit used in expressing the limit. Decimal values and tolerances do not imply a particular method of mea- surement. 1.10 Pressure Rating Designation Class, followed by a dimensionless number, is the designation for pressure -temperature ratings. Standard- ized designations for flanges per ASME B16.5 referenced in this Standard are Classes 150, 300, 600, 900, 1500, and 2500. 2，PRESSURE RATINGS 2.1 Basis of Ratings The allowable pressure ratings for fttings designed in accordance with this Standard may be calculated a for straight seamless pipe of equivalent material (as shown by comparison of composition and mechanical properties in the respective material specifications) in accordance with the rules established in the applicable sections of ASME B31, Code for Pressure Piping. For the calculation, applicable data for the pipe size, wall thickness, and material that is equivalent to that of the ftting shall be used. Pipe size, wall thickness (or sched- ule number), and material identity on the fttings are in lieu of pressure rating markings.ASME B16.9 pdf download.
