ASME B16.5:2013 pdf free download

ASME B16.5:2013 pdf free download.Pipe Flanges and Flanged Fittings.
(d) Where Class 300 steel flanges arc bolted to Class 250 cast iron flanges, the gaskets should be made of Nonmandator Appendix B. Table 13-1, Group No. Ia materials
(1) low-strength bolting within the limitations of pars. 5.3.4 should be used with gaskets extending to th bolt holes and with the flanges having either raised or flat faces or
(2) bolting of low (para. 5.3.4), intermediate (para. 5.3.3), or high (para. 5.3.2) strength may be used with full face gaskets extending to the outside diameters of the flanges and with both the Class 300 steel and Class 250 cast iron flanges having flat laces
5.4 Gaskets
5.4.1 General Ring joint gasket matenals shall conform to ASME 1316.20. Materials for other gaskets are described in Nonmandatory Appendix B. The user is responsible for selection of gasket materials that will withstand the expected bolt loading without injurious crushing and that are suitable for the service conditions. Particular attention should be given to gasket selection if a system hydrostatic test approaches or exceeds the test pressure specified in pars. 2.6.
5.4.2 Gaskets for Low-Strength Boiling. II bolting listed as low strength in Table III is used, gaskets shown in Nonmandatory Appendix 13. Table B-i. Group No. Ia are recommended.
5.4.3 Gaskets for Class 150 Flanged joints. It is recommended that only Nonmandatory Appendix B, Table B-I, Group No. I gaskets be used for Class 150 flanged oints. When the flng point or spiral wound gasket is selected, it is nxommended that line tianges be of the welding neck or lapped joint type.
6 DIMENSIONS
6.1 Flanged Fittings WaLl Thickness
6.1.1 Minimum Wall Thickness. For inspection purposes, the minimum wall thickness. t. of flanged fittings at the time of manufacture shall be as shown in Tables 9 and 12 (Tables 11-9 and 11-12 of Mandatory Appendix II), except as provided in para. 6.1.2. The additional metal thickness needed to withstand installation bolt-up assembly stresses, shapes other than circular, and stress concentrations must be determined by the manufacturer. since Ihesc factors vary widely. In particular, 45-deg laterals, true Ys, arid crosses may require additional reinforcement to compensate for inherent weaknesses in these shapes.
6.1.2 FittIng Local Areas. Local areas having less than minimum wall thickness are acceptable, provided that all of the following conditions are satisfied.