ASME SA 20-2010 pdf download

ASME SA 20-2010 pdf download.SPECIFICATION FOR GENERAL REQUIREMENTS FOR
STEEL PLATES FOR PRESSURE VESSELS.
1.1.1 This general requirements specification also covers a group of supplementary requirements that are applicable to several of the above product specifications as indicated therein. Such requirements are provided for use if additional testing or additional restrictions are required by the purchaser, and apply only ifspecified indi- vidually in the purchase order. 1.2 Appendix X1 provides information on coil as a source of plates for pressure vessels. 1.3 Appendix X2 provides information on the variabil- ity of tensile properties in plates for pressure vessels. 1.4 Appendix X3 provides information on the variabil- ity of Charpy-V-Notch impact test properties in plates for pressure vessels. 1.5 Appendix X4 provides information on cold bending of plates, including suggested minimum inside radii for cold bending. 1.6 These materials are intended to be suitable for fusion welding. When the steel is to be welded, it is presup- posed that a welding procedure suitable for the grade of steel and intended use or service will be utilized. 1.7 In case ofany conflict in requirements, the require- ments of the applicable product specification prevail over those of this general requirements specification. 1.8 Additional requirements that are specified in the purchase order and accepted by the supplier are permitted, provided that such requirements do not negate any of the requirements of this general requirements specification or the applicable product specification. 1.9 For purposes ofdetermining conformance with this general requirements specification and the applicable prod- uct specification, values are to be rounded to the nearest unit in the right-hand place of figures used in expressing the limiting values in accordance with the rounding method of Practice E 29.
A 562/A 562M Specification for Pressure Vessel Plates, Carbon Steel, Manganese-Titanium for Glass or Dif- fused Metallic Coatings A 577/A 577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates A 578/A 578M SpecificationforStraight-BeamUltrasonic Examination of Plain and Clad Steel Plates for Special Applications A 612/A 612M Specification for Pressure Vessel Plates, Carbon Steel, High Strength, for Moderate and Lower Temperature Service A 645/A 645M Specification for Pressure Vessel Plates, 5% and Nickel Alloy Steels, Specially Heat Treated A 662/A 662M Specification for Pressure Vessel Plates, Carbon-Manganese-Silicon Steel, for Moderate and Lower Temperature Service A 700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment A 724/A 724M Specification for Pressure Vessel Plates, Carbon-Manganese-Silicon Steel, Quenched and Tem- pered, for Welded Pressure Vessels A 734/A 734M Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered A 735/A 735M Specification for Pressure Vessel Plates, Low-Carbon Manganese-Molybdenum-Columbium Alloy Steel, for Moderate and Lower Temperature Service
4. Ordering Information 4.1 Orders should include the following information, as necessary, to adequately describe the desired product. 4.1.1 Quantity (weight [mass] or number of plates), 4.1.2 Dimensions, 4.1.3 Name of product (for example, plates, carbon steel; plates, alloy steel), 4.1.4 Specification designation (including type, class, and grade as applicable) and year-date, 4.1.5 Condition (as-rolled, normalized, quenched and tempered, etc. If heat treatment of plate is to be per- formed by the fabricator, this is to be stated. Also, if purchaser specifies a heat-treatment cycle, this is to be stated), 4.1.6 Impact test requirements, if any (see Section 12). (For Charpy V-notch test, include test specimen orien- tation, testing temperature, and acceptance criteria. For drop-weight test, give testing temperature), 4.1.7 Exclusion of either plates produced from coil or plates produced from plate-as-rolled, ifapplicable. (See 5.4 and Appendix X1.) 4.1.8 Limits for grain refining elements other than aluminum, if applicable (see 8.2.4), 4.1.9 Paint marking (see 13.2.1), 4.1.10 Supplementary requirements, if any (test specimen heat treatment, special impact test requirements, etc.), and 4.1.11 Additional requirements, if any. 5. Materials and Manufacture 5.1 The steel shall be made in an open-hearth, basic- oxygen, or electric-arc furnace, possibly followed by addi- tional refining in a ladle metallurgy furnace (LMF), or by another method; or secondary melting by vacuum-arc remelting (VAR), electroslag remelting (ESR), or another method. 5.2 The steel may be strand cast or cast in stationary molds.