ASME B16.9:2018 pdf free download

ASME B16.9:2018 pdf free download.Factory-Made Wrought Buttwelding Fittings.
1.5.2 Codes and ReguLations. A fitting used under the jurisdiction of the ASME Boiler and Pressure Vessel Code (BPVC), the ASME Code for Pressure Piping. or a governmental regulation is subject to any limitation of that code or regulation. This includes any maximum temperature limitation or rule governing the use of a material at low temperature.
1.6 Service Conditions
Criteria for selection of fitting types and materials suitable for particular fluid service are not within the scope of this Standard.
17 WeLding
Installation welding requirements are outside the scope of this StandarcL
1.8 QuaLity Systems
Nonmandatory requirements relating to the fitting manufacturer’s Quality System Program are described In Nonmandatory Appendix A.
1.9 Convention
For determining conformance with this Standard, the convention for fixing significant digits where limits (maximum and minimum values) are specified shall be as defined in ASTM E29. This requires that an observed or calculated value be rounded off to the nearest unit in the last right-hand digit used for expressing the limit. Decimal values and tolerances do not imply a particular method of measurement.
1.10 Pressure Rating Designation
Class followed by a dimensionless number Is the designation for pressure—temperature ratings. Standardized designations for flanges per ASME B 16.5 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 fittings designed in accordance with this Standard may be calculated as 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 are equivalent to that of the fitting shall be used. Pipe size, wall thickness (or schedule number), and material identity on the fittings are in lieu of pressure rating markings.
2.2 Design of Fittings
2.2.1 AcceptabLe Design Methods. The design of fittings shall be established by one of the following methods:
(a) mathematical analyses contained in nationally recognized pressure vessel or piping codes (e.g.. ASME B31.3 para. 304.2 for elbows and para, 304.3 for tees).
(b) proof testing in accordance with section 9 of this Standard.
(c) experimental stress analysis, such as described in ASME BPVC, Section VIII. Division 2, Annex S.F with validation of rsuILs. Hydrostatic testing can be used to validate experimental results.
(d) detailedstressanalysis(e,g.,finiteelement method) with results evaluated as described InASME BPVC, Section VIII, Division 2, Part 5 with validation of results. Strain measurement, photoelastic testing, or hydrostatic testing can be used to validate calculated results.
2.2.2 Design Thickness. To meet design or manufacturing requirements, it is expected that some portion of formed fittings may have to be thicker than the pipe wall with which the fitting is intended to be used. The mathematical analyses, If used. may take into account such thicker sections.