JIS G3462 is a standard specification for alloy steel tubes intended for use in boilers, heat exchangers, and other high-temperature applications.

JIS G3462是用於鍋爐、熱交換器和其他高溫應用的合金鋼管的標準規範。

JIS G3462 is a Japanese Industrial Standard that covers the specifications for alloy steel tubes used for exchanging heat on the inside and outside of the tube in high-temperature applications such as boilers, heat exchangers, and fired heaters. The standard specifies several grades of alloy steel tubes, including STBA12, STBA13, STBA20, and STBA22. The U-bend tubes made from cold-bending process also comply with the standard, with specific requirements for bending radius and heat treatment. JIS G3462 is an important standard for the manufacture and use of alloy steel tubes in high-temperature applications, especially in industries that require reliable and efficient heat transfer.

JIS G3462是日本工業標準，涵蓋了用於鍋爐、熱交換器和火焰加熱器等高溫應用中管內外換熱的合金鋼管的規格。該標準規定了幾種等級的合金鋼管，包括STBA12、STBA13、STBA20和STBA22。冷彎工藝製成的U形彎管也符合標準，對彎曲半徑和熱處理有具體要求。JIS G3462是高溫應用中合金鋼管製造和使用的重要標準，特別是在需要可靠和高效傳熱的行業。

Scope範圍

This Standard specifies the alloy steel tubes (hereafter referred to as "tubes") used for exchanging heat between the inside and outside of the tube, such as water tubes,smoke tubes, superheater tubes and air preheater tubes of boilers, and heat exchanger tubes, condenser tubes and catalyst tubes used in chemical and petroleum industries.It is not applicable to the steel tubes for heating furnace and steel heat exchanger tubes for low temperature service.

本標準規定了用於管內外換熱的合金鋼管（以下簡稱“管”），如鍋爐的水管、煙管、過熱器管和空氣預熱器管，以及化學和石油工業中使用的換熱器管、冷凝器管和催化劑管。不適用於加熱爐用鋼管和低溫用鋼製換熱器管。

This Standard applies to tubes with an outside diameter of 15.9 mm. to 139.8 mm.本標準適用於外徑為15.9mm至139.8mm的管子。
With the preyious agreement of the  manufacturer, the purchaser may designate the  special quality requirements and designate U-bend tubes to be applied,given in Annex JA and Annex JBA respectively in addition to the requirements specified .in the. text of this Standard.

經製造商同意，買方可指定特殊質量要求，並指定要應用的U形彎管，除中規定的要求外，還可分別在附件JA和附件JBA中給出。本標準的文本。

NOTE: The International Standards corresponding to this Standard and the symbol of degree of correspondence are as follows:

注：與本標準相對應的國際標準和對應程度符號如下：
ISO 9329-2 : 1997 Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 2 : Unalloyed and alloyed steels with specified eleva ted tempera ture properties ISO 9330-2 : 1997 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 2 : Electric resistance and induction welded unalloyed and alloyed steel tubes with specified elevated temperature properties (overall evalsuation: MOD)The symbols which denote the degree of correspondence in the contents between the relevant International Standards and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/lEe Guide 21-1.

ISO 9329-2:1997壓力用無縫鋼管-技術交付條件-第2部分：具有規定高溫性能的非合金鋼和合金鋼ISO 9330-2:1997.壓力用焊接鋼管-技術交貨條件-第二部分：具有指定高溫性能的電阻和感應焊接非合金和合金鋼管（總體評價：MOD）根據ISO/lEe指南21-1，表示相關國際標準和JIS內容對應程度的符號是IDT（相同）、MOD（修改）和NEQ（不等效）。

Normative references規範性引用文件

The following standards contain provisions which, through reference in this text,constitute provisions of this Standard. The most recent editions of the standards (including amendments) indicated below shall be applied.

下列標準中的條款通過在本標準中引用而構成本標準的條款。應采用以下所示標準的最新版本（包括修訂版）。

• JIS G 0320 Standard test method for heat analysis of steel products  JIS G 0320鋼製品熱分析的標準試驗方法
• JIS G 0321 Product analysis and its tolerance for wrought steel  JIS G 0321鍛鋼蜜桃视频APP入口分析及其公差
• JIS G 0404 Steel and steel products - General technical delivery requirements  JIS G 0404鋼和鋼製品-一般交貨技術要求
• JIS G 0415 Steel and steel products - Inspection documents  JIS G 0415鋼和鋼製品-檢驗文件
• JIS G 0416 Steel and steel products - locations and preparation of samples and test pieces for mechanical testing  JIS G 0416鋼和鋼製品-機械試驗用樣品和試件的位置和製備
• JIS G 0567 Method of elevated temperature tensile test for steels and heat-resisting alloys  JIS G 0567鋼和耐熱合金的高溫拉伸試驗方法
• JIS G 0582 Automated ultrasonic examination of steel pipes and tubes  JIS G 0582鋼管的自動超聲波檢測
• JIS G 0583 Automated eddy current examination of steel pipes and tubes  JIS G 0583鋼管渦流自動檢測
• JIS Z 2241 Metallic materials - Tensile testing - Method of test at room temperature  JIS Z 2241金屬材料拉伸試驗室溫試驗方法
• JIS Z 2245 Rockwell hardness test - Test method  JIS Z 2245洛氏硬度試驗試驗方法
• JIS Z 8401 Guide to the rounding of numbers  JIS Z 8401數字四舍五入指南

Classification and symbols分類和符號

Tubes shall be classified into grades, and the designation of grade and designation of manufacturing method shall be as given in table 1

管子應分為等級，等級名稱和製造方法名稱應如表1所示

Table 1 Designation of grade, designation of manufacturing method and marking表1等級名稱、製造方法名稱和標記

Manufacturing method製造方法

The manufacturing method shall be as follows.製造方法如下。

1. Tubes shall be manufactured by a combination of the manufacturing method and finishing method given in table 1

1. 管子應采用表1中給出的製造方法和精加工方法相結合的方式製造
   (b)The tubes of STBA 12, STBA 13, STBA 20 and STBA 22 shall be manufactured by seamless process or by electric resistance welding process and the tubes of STBA 23, STBA24, STBA 25 and STBA 26 shall be manufactured by seamless process.
2. STBA 12、STBA 13、STBA 20和STBA 22的管子應采用無縫工藝或電阻焊工藝製造，STBA 23、STBA24、STBA 25和STBA 26的管子應通過無縫工藝製造。
   (c)Tubes shall be subjected to the Heat treatment specified in table 22.Other heat treatments not specified in table 2 shall be agreed between the purchaser and the manufacturer.
3. 管子應進行表22中規定的熱處理。表2中未規定的其他熱處理應由買方和製造商商定。
   (d) Plain end finishing shall be applied to the shape of tube end unless otherwise specified.

（d） 除非另有規定，否則管端形狀應采用平端精加工。

Table 2 Heat treatment表2熱處理

JIS G3462 specifies the alloy boiler steel tubes used for exchanging heat on the inside and outside of the tube, with 8 steel grades from STBA12-STBA26, it has the similar application as JIS G3461, steel tube of this specification could be supplied as U tube. However, it is not applicable to the steel tubes for heating furnace and those for heat exchangers of low temperature service. For final product, heat treatment of the bent portion is not usually performed.

JIS G3462規定了用於管內外換熱的合金鍋爐鋼管，采用STBA12-STBA26中的8個鋼種，其應用與JIS G3461相似，本規範的鋼管可以作為U型管供應。然而，它不適用於加熱爐和低溫換熱器的鋼管。對於最終蜜桃视频APP入口，通常不進行彎曲部分的熱處理。

However, if there is a request from the orderer, agreement on heat treatment. Sunny Steel is an experienced boiler and pressure steel tube supplier which can offer you JIS G3462 steel tube of all grade and dimension range.

但是，如果訂購方提出要求，就熱處理達成協議。Sunny Steel是一家經驗豐富的鍋爐和壓力鋼管供應商，可以為您提供各種等級和尺寸範圍的JIS G3462鋼管。

Chemical Compositions(%) of JIS G3462  JIS G3462的化學成分（%）

Note:注：

OD refers to the outside diameter. OD是指外徑。

The above table is only applicable for heat exchanger alloy steel pipes. The buyer can appoint the upper limit value of tensile strength. The upper limit value of tensile strength is the above shown value plus 147 N/mm2.

上表僅適用於換熱器合金鋼管。買方可以指定抗拉強度的上限值。抗拉強度的上限值為上述值加147 N/mm2。

For the alloy steel tube with the thickness of less than 8 mm, we use NO.12 sample for tensile test. The minimum elongation will be reduced by 1.5% from the table value when the thickness reduces 1 mm. The value ​​obtained will be rounded to an integer value according to JIS Z 8401 (a rounding method). When we take the electric resistance welded steel pipes for tensile test, we also choose NO.12 sample from the parts not containing welding seams.

對於厚度小於8mm的合金鋼管，蜜桃一区二区精品使用NO.12樣品進行拉伸試驗。當厚度減少1mm時，最小伸長率將比表值減少1.5%。根據JIS Z 8401（四舍五入法），將獲得的值四舍五舍五入為整數值。當蜜桃一区二区精品對電阻焊鋼管進行拉伸試驗時，蜜桃一区二区精品還從不含焊縫的零件中選擇了12號樣品。

Mechanical proertiesof JIS G3462 JIS G3462的機械性能

Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements.  包裝：裸裝/捆包/板條箱/板條箱保護管兩側或根據客戶要求。
Painting: as requested.繪畫：按要求。

The tubes shall be manufactured by seamless process, electric resistance welding process, or butt welding process, and those of other grades shall be manufactured by seamless process or electric resistance welding process. The tube shall be as manufactured or as cold-finished condition, or they shall be subjected to appropriate heat treatment.

管子應采用無縫工藝、電阻焊工藝或對接焊工藝製造，其他等級的管子應采用無接縫工藝或電阻焊工藝製造。管子應為製造狀態或冷加工狀態，否則應進行適當的熱處理。

The tubes shall be practically straight. and the two ends shall be at right angles to the axis of the tube. The tubes shall be free from defects detrimental to practical use.

管子應幾乎筆直。兩端應與管子軸線成直角。管子應無不利於實際使用的缺陷。

Higher temperature resistance or capacity corrosion, end up being widely used by petroleum, chemical engineering, boiler, heat exchanger and other power areas. JIS G3462 alloy steel tube is not applicable for heating furnaces and heat exchangers for low temperature service.

耐高溫或耐腐蝕能力更強，最終被廣泛應用於石油、化工、鍋爐、換熱器等電力領域。JIS G3462合金鋼管不適用於低溫環境下的加熱爐和熱交換器。

Size Array of JIS G3462 Alloy Steel PipeSize Array of JIS G3462 Alloy Steel Pipe

• Outer dimension is from 19.05 mm to 168.3 mm.·外部尺寸為19.05毫米至168.3毫米。
• Wall thickness ranges from three.0 mm to 14 mm.·壁厚範圍為3.0毫米至14毫米。
• The particular length of such alloy steel tube is 19000 millimeters.·這種合金鋼管的具體長度為19000毫米。

Equivalent steel grade of JIS G3462  JIS G3462的等效鋼級

Heat treatment of JIS G3462  JIS G3462的熱處理

Advantages優勢

JIS G3462 regulates the allowable size deviation of alloy steel pipes, but JST advanced rolling technology can effectively lessens the deviation range and inside the dimension of alloy steel tube better. We may also supply other sizes of pipes solution . customers’ requirements, but ought to ensure these alloy steel pipes pursue IS G3462 standards.

JIS G3462規定了合金鋼管的允許尺寸偏差，但JST先進的軋製技術可以有效地減小偏差範圍，更好地減小合金鋼管的內部尺寸。蜜桃一区二区精品還可以提供其他尺寸的管道解決方案。客戶的要求，但應確保這些合金鋼管符合IS G3462標準。

In production process, there always exists flaw, scar, wrinkling, laceration, rolling burr and other defects on alloy steel tube. JST configures UNICORN ultrasonic joint inspection machine, automatic ultrasonic testing equipment, magnetic flux inspection machine and other styles of inspection machines. They can test our alloy steel pipes.

在蜜桃视频网站在线观看過程中，合金鋼管上總是存在缺陷、疤痕、起皺、撕裂、軋製毛刺等缺陷。JST配置UNICORN超聲波聯合檢測機、全自動超聲波檢測設備、磁通量檢測機等多種檢測設備。他們可以測試蜜桃一区二区精品的合金鋼管。

JST also employs professional surface inspectors who’s able to test the inconspicuous defects on the lining and outside surface of alloy steel tubes. As mentioned by the defect characteristics, perform polishing, removal, repair when a series of processes.

JST還雇傭了專業的表麵檢驗員，他們能夠測試合金鋼管襯裏和外表麵上不明顯的缺陷。根據缺陷特征，進行拋光、去除、修複等一係列工藝。

JIS G3461 Carbon Steel Pipes Dimensions Tolerance JIS G3461碳鋼管尺寸公差

Tolerances of Wall Thickness壁厚公差

Tolerances of  Outside Diameter外徑公差

Tolerances of Length長度公差

JIS G3461 Carbon Steel Pipes Dimensions Tolerance  JIS G3461碳鋼管尺寸公差

Tolerances of Wall Thickness壁厚公差

Tolerances of  Outside Diameter外徑公差

Tolerances of Length長度公差