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規範涵蓋了用於承壓部件（即省煤器）和其他耐腐蝕應用的最小壁厚、無縫和電阻焊接低合金鋼管的標準。鋼管應進行熱處理或冷處理。所有管子應正火或進行必要的熱處理，以符合本規範的要求。化學成分應符合規定的碳、錳、磷、硫、矽、銅、鉻、鎳和鉬含量。應進行拉伸、壓扁、擴口、法蘭、硬度、反向壓扁和靜水壓試驗。插入鍋爐的管子應能承受膨脹和彎曲，而不會出現裂紋或缺陷。管子還應符合抗拉強度、屈服強度、硬度和伸長率要求。

Scope範圍

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本規範2涵蓋了用於承壓部件（如省煤器或其他耐腐蝕性很重要的應用）的最小壁厚低合金鋼管。

1.2本規範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範的所有其他要求。

1.3機械性能要求不適用於小於1/4英寸的油管。內徑為[3.2毫米]或厚度為0.015英寸[0.4毫米]。

1.4本規範涵蓋三個等級、兩種類型和兩種製造飾麵：

1.4.1表1（化學要求）和表3（拉伸要求）中確定了1、2和3級，

1.4.2類型（無縫或電阻焊接），

1.4.3製造（熱加工或冷加工）。

1.5提供了可選的補充要求S1和S2，如有需要，應在訂單中注明。

1.6以國際單位製或英寸-磅單位表示的值應單獨視為標準值。在文本中，國際單位製顯示在括號中。每個係統中所述的值可能不是完全等效的；因此，每個係統都應獨立使用。將兩個係統的值結合起來可能會導致不符合標準。除非訂單中指定了本規範的“M”名稱，否則應采用英寸-磅單位。

1.7本國際標準是根據世界貿易組織技術性貿易壁壘委員會發布的《關於製定國際標準、指南和建議的原則的決定》中確立的國際公認的標準化原則製定的。

Chemistry Composition化學成分

Mechanical Properties機械性能

Outside Diameter & Tolerance外徑和公差

Parameter參數

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.

長度：6050mm；6096mm；7315mm；11800毫米；12000mm；等等。

最大展開長度：30米，也可提供U形彎曲。

Popular Dimensions尺寸大小

Testings測試

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.

所需的機械測試

張力測試——將對不超過50根管子的試樣進行一次張力測試。

壓扁試驗——將對每批成品管兩端的試樣進行一次壓扁試驗，而不是用於擴口或翻邊試驗的試樣。

法蘭試驗（ASTM A423 1級焊接鋼管）——應對每批成品管的每一端進行一次法蘭試驗，而不是用於壓扁試驗的試樣。

硬度試驗——對每批兩根管子的試樣進行布氏或洛氏硬度試驗

反向壓扁試驗——對於焊接管，應在每1500英尺[460米]成品管的試樣上進行一次反向壓扁試驗。

靜水壓或無損電試驗——每根管子都將接受靜水壓試驗。

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

所有管子應按照適用的ASTM B338/B338M、ASTM A450/A450M規範供應

將頒發工廠測試證書

日皮视频在线观看可以根據您的需求提供3.2認證

Product Marking日皮视频APP下载標記

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.

除規範A450/A450M中規定的標記外，標記還應包括熱加工或冷加工，以及無縫或焊接。