ASTM A423 specification covers standards for minimum-wall-thickness, seamless, and electric-resistance welded low-alloy steel tubes to be used for pressure containing parts, that is economizers, and for other corrosion resistant applications. Steel tubes shall either be processed to hot or cold finish. All tubes shall be normalized or given such heat treatment as may be necessary to conform to the requirements of this specification. Chemical composition shall adhere to specified carbon, manganese, phosphorus, sulfur, silicon, copper, chromium, nickel, and molybdenum contents. Tension, flattening, flaring, flange, hardness, reverse flattening, and hydrostatic tests shall be performed. Tubes when inserted in the boiler shall stand expanding and bending without showing cracks or flaws. Tubes shall also conform to tensile strength, yield strength, hardness, and elongation requirements.

ASTM A423規(guī)范涵蓋了用于承壓部件（即省煤器）和其他耐腐蝕應(yīng)用的最小壁厚、無(wú)縫和電阻焊接低合金鋼管的標(biāo)準(zhǔn)。鋼管應(yīng)進(jìn)行熱處理或冷處理。所有管子應(yīng)正火或進(jìn)行必要的熱處理，以符合本規(guī)范的要求?；瘜W(xué)成分應(yīng)符合規(guī)定的碳、錳、磷、硫、硅、銅、鉻、鎳和鉬含量。應(yīng)進(jìn)行拉伸、壓扁、擴(kuò)口、法蘭、硬度、反向壓扁和靜水壓試驗(yàn)。插入鍋爐的管子應(yīng)能承受膨脹和彎曲，而不會(huì)出現(xiàn)裂紋或缺陷。管子還應(yīng)符合抗拉強(qiáng)度、屈服強(qiáng)度、硬度和伸長(zhǎng)率要求。

Scope范圍

1.1 This specification2 covers minimum-wall-thickness, low-alloy steel tubes for pressure containing parts such as economizers or other applications where corrosion resistance is important.

1.2 The tubing sizes and thicknesses usually furnished to this specification are 1/2 to 5 in. [12.7 to 127 mm] in outside diameter and 0.035 to 0.500 in. [0.9 to 12.7 mm] inclusive, in minimum wall thickness. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification.

1.3 Mechanical property requirements do not apply to tubing smaller than 1/4 in. [3.2 mm] in inside diameter or 0.015 in. [0.4 mm] in thickness.

1.4 This specification covers three grades, two types, and two manufacture finishes:

1.4.1 Grades 1, 2, and 3 are identified in Table 1 (Chemical Requirements), and Table 3 (Tensile Requirements),

1.4.2 Type (seamless or electric-resistance welded),

1.4.3 Manufacture (hot finished or cold finished).

1.5 Optional supplementary requirements S1 and S2 are provided and, when desired, shall be so stated in the order.

1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.

1.7 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.

1.1本規(guī)范2涵蓋了用于承壓部件（如省煤器或其他耐腐蝕性很重要的應(yīng)用）的最小壁厚低合金鋼管。

1.2本規(guī)范中通常提供的管材尺寸和厚度為外徑1/2至5英寸[12.7至127毫米]，最小壁厚0.035至0.500英寸[0.9至12.7毫米]。可以提供具有其他尺寸的管子，前提是這些管子符合本規(guī)范的所有其他要求。

1.3機(jī)械性能要求不適用于小于1/4英寸的油管。內(nèi)徑為[3.2毫米]或厚度為0.015英寸[0.4毫米]。

1.4本規(guī)范涵蓋三個(gè)等級(jí)、兩種類(lèi)型和兩種制造飾面：

1.4.1表1（化學(xué)要求）和表3（拉伸要求）中確定了1、2和3級(jí)，

1.4.2類(lèi)型（無(wú)縫或電阻焊接），

1.4.3制造（熱加工或冷加工）。

1.5提供了可選的補(bǔ)充要求S1和S2，如有需要，應(yīng)在訂單中注明。

1.6以國(guó)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。在文本中，國(guó)際單位制顯示在括號(hào)中。每個(gè)系統(tǒng)中所述的值可能不是完全等效的；因此，每個(gè)系統(tǒng)都應(yīng)獨(dú)立使用。將兩個(gè)系統(tǒng)的值結(jié)合起來(lái)可能會(huì)導(dǎo)致不符合標(biāo)準(zhǔn)。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。

1.7本國(guó)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(huì)發(fā)布的《關(guān)于制定國(guó)際標(biāo)準(zhǔn)、指南和建議的原則的決定》中確立的國(guó)際公認(rèn)的標(biāo)準(zhǔn)化原則制定的。

Chemistry Composition化學(xué)成分

Mechanical Properties機(jī)械性能

Outside Diameter & Tolerance外徑和公差

Parameter參數(shù)

Wall thickness & Tolerance壁厚和公差

Length: 6050mm; 6096mm; 7315mm; 11800mm; 12000mm; and so on.
Max developed length: 30 meters, also U bending can be offered.

長(zhǎng)度：6050mm；6096mm；7315mm；11800毫米；12000mm；等等。

最大展開(kāi)長(zhǎng)度：30米，也可提供U形彎曲。

Popular Dimensions尺寸大小

Testings測(cè)試

Mechanical Tests Required

Tension Test—One tension test will be made on a specimen for lots of not more than 50 tubes.
Flattening Test—One flattening test will be made on specimens from each end ofone finished tube, not the one used for the flaring or flanging test, from each lot .
Flange Test (ASTM A423 Grade 1 Welded Steel Tubes)—One flange test shall be made on specimens from each end of one finished tube, not the one used for the flattening test, from each lot.
Hardness Test—Brinell or Rockwell hardness tests will be made on specimens from two tubes from each lot
Reverse Flattening Test—For welded tubes, one reverse flattening test shall be made on a specimen from each 1500 ft [460 m] of finished tubing.
Hydrostatic or Nondestructive Electric Test—Each tube will be subjected to the hydrostatic test.

所需的機(jī)械測(cè)試

張力測(cè)試——將對(duì)不超過(guò)50根管子的試樣進(jìn)行一次張力測(cè)試。

壓扁試驗(yàn)——將對(duì)每批成品管兩端的試樣進(jìn)行一次壓扁試驗(yàn)，而不是用于擴(kuò)口或翻邊試驗(yàn)的試樣。

法蘭試驗(yàn)（ASTM A423 1級(jí)焊接鋼管）——應(yīng)對(duì)每批成品管的每一端進(jìn)行一次法蘭試驗(yàn)，而不是用于壓扁試驗(yàn)的試樣。

硬度試驗(yàn)——對(duì)每批兩根管子的試樣進(jìn)行布氏或洛氏硬度試驗(yàn)

反向壓扁試驗(yàn)——對(duì)于焊接管，應(yīng)在每1500英尺[460米]成品管的試樣上進(jìn)行一次反向壓扁試驗(yàn)。

靜水壓或無(wú)損電試驗(yàn)——每根管子都將接受靜水壓試驗(yàn)。

General Requirements一般要求

All tubes shall be supplied as per applicable ASTM B338 /B338M, ASTM A450/A450M Specification
Mill test certificates will be issued
We can provide 3.2 Certification according to the needs of you

所有管子應(yīng)按照適用的ASTM B338/B338M、ASTM A450/A450M規(guī)范供應(yīng)

將頒發(fā)工廠測(cè)試證書(shū)

我們可以根據(jù)您的需求提供3.2認(rèn)證

Product Marking產(chǎn)品標(biāo)記

In addition to the marking prescribed in Specification A450/A450M, the marking shall include whether hot finished or cold finished, and whether seamless or welded.

除規(guī)范A450/A450M中規(guī)定的標(biāo)記外，標(biāo)記還應(yīng)包括熱加工或冷加工，以及無(wú)縫或焊接。