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. 1.10 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents.
3.1.7.1 Discussion — Steel plates are available in various thickness, width, and length combinations depen- dentupon equipmentandprocessing capabilities ofvarious manufacturers and processors. Historic limitations of a plate based upon dimensions (thickness, width, and length) do not take into account current production and processing capabilities. To qualify any plate to a particular product specification requires that all appropriate and necessary tests be performed and that the results meet the limits prescribed in that product specification. If the necessary tests required by a product specification can not be con- ducted, the plate can not be qualified to that specification. This general requirements specification contains permitted variations forthecommonly availablesizes. Permittedvari- ations for other sizes are subject to agreement between the purchaser and the manufacturer or processor, whichever is applicable. 3.1.8 precipitation heat treatment — a subcritical temperature thermal treatment performed to cause precipi- tationofsubmicroscopic constituents, andso forth, to result in enhancement of some desirable property. 3.1.9 processor —the organization that directly con- trols, or is responsible for, operations involved in the pro- cessing of coil into finished plates. Such processing operations include decoiling, leveling, cutting to length, testing, inspection, conditioning, heattreatment (ifapplica- ble), packaging, marking, loading for shipment, and certi- fication. 3.1.9.1 Discussion — The processing operations need notbe done by the organization thatdidthe hotrolling of the coil. If only one organization is involved in the hot rolling and processing operations, that organization is termed the manufacturer for the hot rolling operation and the processor for the processing operations.
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 A 736/A 736M Specification for Pressure Vessel Plates, Low-Carbon Age-Hardening Nickel-Copper-Chro- mium-Molybdenum-Columbium and Nickel-Copper- Manganese-Molybdenum-Columbium Alloy Steel A 737/A 737M Specification for Pressure Vessel Plates, High-Strength, Low-Alloy Steel