ASME SA312:2013 pdf free download

ASME SA312:2013 pdf free download。Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Molybdenum and Manganese-Molybdenum-Nickel.
3. General Requirements and Ordering Information
3.I Material supplicd to this material specification shall conform to Specification A2WA2OM. These requirements outline the testing and relesling methods and procedures. permitted vanations in dimensions, and mass, quality and repair of defects, marking, loading, and ordering information,
3.2 In addition to the basic requirements of this specification. certaill supplementary requirements are available rhcfl additional control, testing, or examination is required to
meet end usc requirements. The purchaser is refirrcd to the listed supplementary requirements in this specification and to the detailed requirements in Specification A2WA2OM.
3.3 Coils are excluded from qualification to this specifica(ion until they are pwcsscd into finished plates. Plates produced from coil means plates that have been cut to individual lengths froni coil. The processor directly controls, or is responsible for, the operations invohed in the processing of coils into finished plates. Such operations include decoiling. leveling, cutting to length. testing, inspection, conditioning.
heat treatment (if applicable), packaging. marking. loading for shipment. and certification.
Non 1—For platc% produced from coil and Iumkhed without heat reatmcnt ui with %trcs% reli ing only, three te%t reuIi u’c reported for
each qualifying coil. Additional requirements regarding ilates from coil are described in Specification A20/A2OM.
3.4 If the requirements of this specification are in conflict with the requirements of Specification A20/A2OM. the requirements of this specification shall peevail.
4. Materials and Manufacture
4.1 Swdmaking Practice—The steel shall be killed and shall conform to the fine grain size requirement of Specification A20/A2OM.
4,5•4 When no preference is specified, the supplier may furnish either a hot-dip zinc coating in accordance with Specification F 2329. or a mechanically deposited zinc coating in accordance with Specification B 695, Class 55. Threaded components (bolts and nuts) shall be coated by the same zinc-coating process and the supplier’s option is limited to one process per itcin with no mixed processes in a lot.
5. ChemIcal ComposItion
5.1 Grade A and B bolts and studs shall have a heat analysis conforming to the requirements specified in Table I based on the steel producer’s heat analysis.
5.2 The purchaser shall have the option of conducting product analyses on nished bolts in each lot, which shall conform to the product analysis specified in Table I.
5.3 In case of conflict or for referee purposes, the product analysis shall take precedence.
5.4 Bolts and studs are customarily furnished from stock, in which case individual heats of steel cannot he identified.
5.5 Application of heats of steel to which bismuth. selenium, tellurium, or lead has been intentionally added shall not be permitted for Grade B bolts and studs.
5.6 Chemical analyses shall be performed in accordance with Test Methods. Practices, and Terminology
A 751.
6. Mechanical Properties
6.1 Grades A and B bolts and studs shall conform to the hardness specified in Table 2.
6.2 Grade A and B bolts and studs L in. in diameter or less, other than those excepted in 6.4. shall be tested full size and shall conform to the requirements for tensile strength specifIed in Table 3.
6.3 Grade A and B bolts and studs larger than I in. in diameter, other than those excepted in 6.4. shall preferably be tcsted full size and when equipment of sufficient capacity is available and shall conform to the requirements for tensile strength specified in Table 3. When equipment of sufticiCnt capacity for full-size bolt testing is not available, or when the length of the bolt makes full-size testing impractical, machined specimens shall be tested and shall conform to the requirements specified in Table 4.
6.4 Grades A and B bolts and studs less than three diameters in length or bolts with drilled or undersize heads are not subject to tensile tests.
6.5 In the event tha bolts are tested by both full size and by machine test specimen methods, the full-size test.