ASME B16.24-2021 pdf download

ASME B16.24-2021 pdf download.Cast Copper Alloy Pipe Flanges, Flanged Fittings, and Valves.
3.6 System Hydrostatic Test Flanged joints, flanged fittings, and flanged or threaded end valves maybe subjected to systemhydrostatictests at pressuresnottoexceed1.5 timesthetabulatedpressureat 38°C (100°F). System testing at higher pressures is the responsibility of the user, subject to the requirements of the applicable code or regulations. 4 SIZE AND METHOD OFDESIGNATING OPENINGS 4.1 Flanges, Fittings, and Valves The size ofa flange, fitting, or valve is identified by the corresponding NPS. 4.2 Reducing Fittings Reducing fittings shall be designated by the size ofthe openings in their proper sequence as indicated in Figure 4.2-1. 5 MARKING 5.1 General Except as modified herein, flanges, flanged fittings, and valves shall be marked as required in MSS SP-25.
5.1.1 Name. The manufacturer’s name or trademark shall be applied. 5.1.2 Material. ð21Þ All flanges, flanged fittings, and valves shall be marked with the material’s applicable ASTM des- ignation (e.g., B61, B62, and B148). In addition, the appli- cable grade identification symbol “952,” “954,” or “958” is required for flanges cast to ASTM B148. 1 5.1.3 Pressure–Temperature Rating Designation. The flange, flanged fitting, or valve shall be marked with the number that corresponds to its pressure–temperature rating class designation (i.e., 150, 300, 600, 900, 1500, or 2500). 5.1.4 Conformance. The designation B16 or B16.24 shall be applied to the flange, flanged fitting, and valve, preferably located adjacent to the class designation, to indicate conformance to this Standard. The use of the prefix “ASME” is optional.
6 MATERIALS 6.1 General ProductscoveredbythisStandardshallbemadeofcast- ings producedto therequirements ofpara. 6.2 orpara. 6.3. 6.2 Flanges Flanges shall be in accordance with the material re- quirements specified in para. 6.2.1, para. 6.2.2, or para. 6.2.3. 6.2.1 ASTM B61. Castings shall meet the requirements of ASTM B61 alloy C92200. 6.2.2 ASTM B62. Castings shall meetthe requirements of ASTM B62 alloy C83600. 6.2.3 ASTM B148. ð21Þ Castings shall meet the require- ments of ASTM B148 alloy C95200, C95400, or C95800, and the additional requirements specified in paras. 6.2.3.1 through 6.2.3.5. 6.2.3.1 Ordering Information. Ordering information for ASTM B148 castings shall include tests on each lotand the form of the test bar. 6.2.3.2 Test Bars. For ASTM B148 castings, a minimum of three test bars shall be poured from each lot of cast metal. Chemical composition and mechanical property tests shall be performed using the test bars from each lot. 6.2.3.3 Sampling. For ASTM B148 castings, the sample for chemical analysis shall be taken from the test bar casting or other casting sample in such a manner as to be representative of each casting lot. 6.2.3.4 Weld Repair Approval. ASTM B148 castings shallnotberepaired,plugged,welded,orburned-inunless permission from the user of the cast product has been previously secured. This will be requested of the user upon the manufacturer’s determination that casting defects are such thatafterthe approved repair, the useful- ness and the strength ofthe casting will not be impaired. 6.2.3.5 Weld Repair. For ASTM B148 castings, preparation for repair welding shall include inspection to ensure complete removal of the defect. Repairs shall bemadeusingweldingproceduresqualifiedinaccordance with ASME BPVC, Section IX. Repairweldingshall be done bywelders orweldingoperators meetingthe qualification requirements of that Code.
6.3 Flanged Fittings Material for flanged fittings shall be in accordance with either para. 6.2.1 or para. 6.2.2. 6.4 Valves — Flanged and Threaded Material for flanged and threaded valves shall be in accordance with para. 6.2.3. 6.5 Bolting Bolting materials recommended for use with copper alloy flanges and flanged fittings are described in paras. 6.5.1 and 6.5.2. 6.5.1 SteelBolting. Carbonsteel boltingconformingto ASTM A307 is not recommended to be used below −29°C (−20°F) norabove204°C(400°F) andislimitedtousewith Classes 150 and 300 flanges, flanged fittings, and flanged valve end connections. 6.5.2 Nonferrous Boltings. The following nonferrous bolting materials are recommended for Classes 150 and 300 flanges, flanged fittings, and valves within the temperature limitation stated. Other bolting materials that have a specified minimum yield strength of at least 206 MPa (30 ksi) may be used when permitted by the applicable code or regulation.