ASTM A789 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service

ASTM A789一般用途無縫和焊接鐵素體/奧氏體不銹鋼管標(biāo)準(zhǔn)規(guī)范

ASTM A789 A789M Covers Grades of nominal wall thickness, stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

ASTM A789 A789M涵蓋了標(biāo)稱壁厚等級的不銹鋼管，用于需要一般耐腐蝕性的服務(wù)，特別強(qiáng)調(diào)耐應(yīng)力腐蝕開裂。如果在高溫下長時間使用，這些鋼容易脆化。

This specification covers standard requirements for grades of nominal wall thickness, stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures. Heat and product analyses shall be performed wherein the steel shall conform to the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, nitrogen, copper, and others. All tubes shall be furnished in the heat-treated condition in accordance with the specified temperature and quench conditions. When the final heat treatment is in a continuous furnace, or when heat treated condition is obtained directly by quenching after hot forming, the number of tubes of the same size and from the same heat in a lot shall be determined from the prescribed sizes of the tubes. The material shall conform to the prescribed tensile and hardness properties. Mechanical tests such as tension test, flaring test (for seamless tubes), flange test (for welded tubes), hardness test, and reverse flattening test shall be performed on the steel tubing. Each tube shall also be subjected to the nondestructive electric test or the hydrostatic test.

本規(guī)范涵蓋了標(biāo)稱壁厚等級的標(biāo)準(zhǔn)要求，適用于需要一般耐腐蝕性的不銹鋼管，特別強(qiáng)調(diào)耐應(yīng)力腐蝕開裂性。如果在高溫下長時間使用，這些鋼容易脆化。應(yīng)進(jìn)行熱和產(chǎn)品分析，其中鋼應(yīng)符合碳、錳、磷、硫、硅、鎳、鉻、鉬、氮、銅等所需的化學(xué)成分。所有管子應(yīng)按照規(guī)定的溫度和淬火條件進(jìn)行熱處理。當(dāng)最終熱處理在連續(xù)爐中進(jìn)行時，或者當(dāng)熱處理?xiàng)l件是在熱成型后直接通過淬火獲得時，同一尺寸和同一爐次的管子數(shù)量應(yīng)根據(jù)規(guī)定的管子尺寸確定。材料應(yīng)符合規(guī)定的拉伸和硬度性能。鋼管應(yīng)進(jìn)行拉伸試驗(yàn)、擴(kuò)口試驗(yàn)（無縫管）、法蘭試驗(yàn)（焊接管）、硬度試驗(yàn)和反向壓扁試驗(yàn)等機(jī)械試驗(yàn)。每根管子還應(yīng)進(jìn)行無損電氣試驗(yàn)或水壓試驗(yàn)。

Scope范圍

1.1 This specification2 covers grades of average wall thickness, or, if specified on the order, minimum wall thickness, of stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

1.1本規(guī)范2涵蓋了需要一般耐腐蝕性服務(wù)的不銹鋼管的平均壁厚等級，或者如果訂單上有規(guī)定，則涵蓋了最小壁厚，特別強(qiáng)調(diào)了抗應(yīng)力腐蝕開裂的能力。如果在高溫下長時間使用，這些鋼容易脆化。

1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Within the text, the SI units are shown in brackets. The inch-pound units shall apply unless the M designation of this specification is specified in the order.

1.2以國際單位制或英寸-磅單位表示的值應(yīng)單獨(dú)視為標(biāo)準(zhǔn)值。每個系統(tǒng)中所述的值可能不是完全等效的；因此，每個系統(tǒng)都應(yīng)獨(dú)立使用。將兩個系統(tǒng)的值結(jié)合起來可能會導(dǎo)致不符合標(biāo)準(zhǔn)。在文本中，國際單位制顯示在括號中。除非訂單中指定了本規(guī)范的M名稱，否則應(yīng)采用英寸-磅單位。

1.3 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.

1.3本國際標(biāo)準(zhǔn)是根據(jù)世界貿(mào)易組織技術(shù)性貿(mào)易壁壘委員會發(fā)布的《關(guān)于制定國際標(biāo)準(zhǔn)、指南和建議的原則的決定》中確立的國際公認(rèn)的標(biāo)準(zhǔn)化原則制定的。

Referenced Documents:參考文件：

ASTM Referenced Standards. ASTM參考標(biāo)準(zhǔn)。

A450 A450M Specification for General requirements for carbon, Ferritic Alloy, and Austenitic alloy steel tubes.

A450 A450M碳、鐵素體合金和奧氏體合金鋼管的一般要求規(guī)范。

A480 A480M Specification for general requirements for flat-rolled stainless and heat-resisting steel plate, sheet, and strip.

A480 A480M平軋不銹鋼和耐熱鋼板、薄板和帶材的一般要求規(guī)范。

A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys.

A941與鋼、不銹鋼、相關(guān)合金和鐵合金有關(guān)的術(shù)語。

E527 Practice for numbering metals and alloys (UNS).

E527金屬和合金編號規(guī)程（UNS）。

Chemical Composition化學(xué)成分

Heat Treatment Requirements熱處理要求

Tensile Requirements

Flange Test (for welded tubes)法蘭試驗(yàn)（適用于焊接管）

One test shall be made on specimens from one end of one tube from each lot of finished tubes.

應(yīng)從每批成品管的一端對試樣進(jìn)行一次測試。

Flaring Test擴(kuò)口試驗(yàn)

One test shall be made on specimens from one end of one tube from each lot of finished tubes. The minimum expansion of the inside diameter shall be 10%.

應(yīng)從每批成品管的一端對試樣進(jìn)行一次測試。內(nèi)徑的最小膨脹應(yīng)為10%。

Reverse Flattening Test反向壓扁試驗(yàn)

For welded tubes, one reverse flattening test shall be made on a specimen from each 1500Ft or 450m of finished tubing.

對于焊接管，應(yīng)在每1500Ft或450m成品管的試樣上進(jìn)行一次反向壓扁試驗(yàn)。

Hydrostatic or Nondestructive Testing靜水壓或無損檢測

Each pipe shall be subjected to the nondestructive electric test or the hydrostatic test, the type of test to be used shall be at the option of the manufacturer, unless otherwise specified in the purchase order.

除非采購訂單中另有規(guī)定，否則每根管道都應(yīng)進(jìn)行無損電氣試驗(yàn)或靜水壓試驗(yàn)，所使用的試驗(yàn)類型應(yīng)由制造商選擇。

The hydrostatic test shall be in accordance with specification A 450/A 450M, except that in the calculation of the hydrostatic test pressure 64000(441.2) shall be substituted for 32000(220.6).

靜水壓試驗(yàn)應(yīng)符合規(guī)范A 450/A 450M，但在計(jì)算靜水壓試驗(yàn)壓力時，應(yīng)將32000（220.6）替換為64000（441.2）。

Markings標(biāo)記

Marking prescribed in specification A450/A 450M, The marking shall indicate whether the tubing is seamless or welded.

規(guī)范A450/A 450M中規(guī)定的標(biāo)記，標(biāo)記應(yīng)表明管子是無縫的還是焊接的。

Note:注：

• Mill test certificates will be issued according to EN10204.3.·
• 工廠測試證書將根據(jù)EN10204.3頒發(fā)。
• All tubes shall be supplied as per applicable ASTM A789 /A789M Specification.·
• 所有管子應(yīng)按照適用的ASTM A789/A789M規(guī)范供應(yīng)。