ASTM A209 鍋爐和過熱器用無縫碳鉬合金鋼管標準 PDF 下載

• 標準號：ASTM A209/A209M-03(2022)
• 發(fā)布單位或類別：美國-美國材料與試驗協(xié)會（US-ASTM）
• 發(fā)布日期：2022-03-01

1.1 本規(guī)范 2. 涵蓋多個等級的最小壁厚、無縫、碳鉬合金鋼、鍋爐和過熱器管。 1.2 本規(guī)范涵蓋管道 1. / 2. 至5英寸。[12.7至127 mm]，包括外徑和0.035至0.500 in。[0.9至12.7 mm]，包括最小壁厚。 1.3 提供了可選的補充要求，如需要，應(yīng)在訂單中說明。 1.4 以英寸-磅單位或國際單位表示的數(shù)值應(yīng)單獨視為標準值。在文本中，國際單位顯示在括號中。每個系統(tǒng)中規(guī)定的值不是精確的等價物；因此，每個系統(tǒng)必須相互獨立使用。合并兩個系統(tǒng)的值可能會導致不符合規(guī)范。除非訂單中規(guī)定了本規(guī)范的“M”名稱，否則英寸-磅單位應(yīng)適用。 1.5 本國際標準是根據(jù)世界貿(mào)易組織技術(shù)性貿(mào)易壁壘（TBT）委員會發(fā)布的《關(guān)于制定國際標準、指南和建議的原則的決定》中確立的國際公認標準化原則制定的。
1.1 This specification 2 covers several grades of minimum-wall-thickness, seamless, carbon-molybdenum alloy-steel, boiler and superheater tubes. 1.2 This specification covers tubes 1 / 2 to 5 in. [12.7 to 127 mm] inclusive, in outside diameter and 0.035 to 0.500 in. [0.9 to 12.7 mm], inclusive, in minimum wall thickness. 1.3 An optional supplementary requirement is provided and, when desired, shall be so stated in the order. 1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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