DIN 1629 German standard for Seamless Circular Tubes of Non Alloys Steels with Special Quality Requirements.

DIN 1629具有特殊質量要求的非合金鋼無縫圓管德國標準。

What is DIN 1629?什麽是DIN 1629？

DIN 1629 is a German standard that specifies the requirements for seamless circular steel tubes of non-alloy steels. These tubes are primarily used for mechanical and general engineering purposes, but they are not suitable for heat treatment or pressure purposes. The key points about DIN 1629 include:

DIN 1629是德國標準，規定了非合金鋼無縫圓鋼管的要求。這些管子主要用於機械和一般工程目的，但不適合熱處理或壓力目的。DIN 1629的關鍵點包括：

DIN 1629 is the standard specifies the Seamless Circular Tubes of Non Alloys Steels with Special Quality Requirements.

DIN 1629是規定具有特殊質量要求的非合金鋼無縫圓管的標準。

DIN 1629 applications the overheated boilers, as minimum thickness ferrite and seamless steel pipes, and as heat exchangers via austenitic pipes.

DIN 1629適用於過熱鍋爐，如最小厚度的鐵素體和無縫鋼管，以及通過奧氏體管道的熱交換器。

Material Grades材料等級

• St 37.0: Minimum yield strength 235 MPa  St 37.0：最小屈服強度235 MPa
• St 44.0: Minimum yield strength 275 MPa  St 44.0：最小屈服強度275 MPa
• St 52.0: Minimum yield strength 355 MPa  St 52.0：最小屈服強度355 MPa

Dimensions尺寸

The standard specifies the outer diameter, wall thickness, and permissible tolerances for the tubes.

該標準規定了管子的外徑、壁厚和允許公差。

Mechanical Properties機械性能

The mechanical properties include tensile strength, yield strength, and elongation, which vary according to the material grade.

機械性能包括抗拉強度、屈服強度和伸長率，這些性能因材料等級而異。

Chemical Composition化學成分

The steel used must meet specific chemical composition limits, including carbon, manganese, phosphorus, and sulfur content.

使用的鋼材必須符合特定的化學成分限製，包括碳、錳、磷和硫含量。

Manufacturing Process製造工藝

Tubes must be manufactured using a seamless process and may be either hot-finished or cold-finished.

管材必須采用無縫工藝製造，可以是熱加工或冷加工。

Testing Requirements測試要求

Various tests are required to ensure the quality of the tubes, including tensile tests, flattening tests, and hardness tests.

需要進行各種測試來確保管子的質量，包括拉伸測試、壓扁測試和硬度測試。

Note筆記

• DN — Nominal Diameter  DN——公稱直徑
• NPS —Nominal Pipe Size  ·NPS——公稱管道尺寸

Field of application應用領域

1. 1. This standard applies to seamless circular tubes and pipes(hereinafter briefly referred to as "tubes") made of unalloyed steels as listed in table 1. These tubes are predominantly used in the constructin of chemical plant, vessels, pipework and for general mechanical engineering purposes. They are designed to meet high performance requirements. Normally there are no limiting vaiues or the maximum permissible working pressure of these tubes. The permissi l working temperature shall not exceed 300℃ are specified in Appendix A.)

1.1本標準適用於表1所列非合金鋼製成的無縫圓管（以下簡稱“管”）。這些管子主要用於化工廠、容器、管道工程和一般機械工程。它們旨在滿足高性能要求。通常，這些管子沒有限製值或最大允許工作壓力。附錄A中規定了允許的工作溫度不得超過300℃。）

The limits of application and other specifications given in this standard shall apply except in cases here other specifications are contained in codes of practice for specific fields of application, e.g. the Technische Regeln fur Dampfkessel (TRD) (Technical rules on steam boilers) or the Technische Regeln fur Druckbehalter (TRB)

本標準中給出的應用範圍和其他規範應適用，除非其他規範包含在特定應用領域的實施規範中，例如《蒸汽鍋爐技術規則》（TRD）或《Druckbehalter技術規範》（TRB）

(Technical rules on pressure vessels), AD-Merkblatter (AD Instrucation sheets).

（壓力容器技術規則），AD Merkblast（AD說明表）。

Chemical composition of steels for seamless circular tuves subject to special repuirements有特殊要求的無縫圓管用鋼的化學成分

1. A content in excess of the maximum value started is permitted if a phosphorus content less than the maximum specifled by 0,005% P per 0,001% N is observed. However, the nitrogen content shall not exceed a value of 0.012% in the cast analysis and 0,014% in the product analysis.

1） 如果觀察到磷含量低於每0001%N 0005%P規定的最大值，則允許含量超過開始的最大值。然而，在鑄件分析中，氮含量不得超過0.012%，在日皮视频APP下载分析中不得超過0014%。

2) The specified maximum values do not apply if the steels are supplied with the RR (instead of R) type of deoxidization

2） 如果鋼材采用RR（而不是R）型脫氧，則指定的最大值不適用

3) The content shall not exceed 0.55% Si and 1,06% Mn in the cast analysis or 0,60% Si and 1,70% Mn in the product analysis

3） 鑄件分析中的矽含量不得超過0.55%，錳含量不得超過1.06%，日皮视频APP下载分析中的錳含量不得高於0.60%

table 3. Amounts by which the chemical composition in the product analysis may deviate from the limiting values applicable to the cast analysis {see table2}

表3。日皮视频APP下载分析中的化學成分可能偏離適用於鑄件分析的極限值的量{見表2]

¹) A contant in excess of the maximum value stated is permitted if a phosphorus content less than the maximum specified by 0,005% P per 0,001% N is observed. However, the nitrogen contant shall not exceed a value of 0,012% in the cast analysis and 0,014% in the product analysis (this does not apply to the RR type of deoxidization.

¹）如果觀察到磷含量低於每0001%N 0005%P規定的最大值，則允許存在超過規定最大值的汙染物。然而，在鑄件分析中，氮含量不得超過0012%，在日皮视频APP下载分析中不得超過0014%（這不適用於RR型脫氧）。

table 4. Mechanical properties of tubes in the as delivered condition at room ternperature For wall thickness exceeding 65 mm, the values shall be agreed at the time of ordering

表4。室溫下交付狀態下管子的機械性能對於壁厚超過65mm的管子，應在訂購時商定這些值

Steel-chemical composition (DIN1629)鋼化學成分（DIN1629）

Mechanical Properties(Mpa)機械性能（Mpa）

¹) For cold f inished tube in the NBK condition (annealed above the upper transformation point under shielding gas or in a vacuum), minimum values of yield stress lower than these valued by 20N/mm² are permitted.

¹）對於NBK條件下的冷加工管（在保護氣體或真空中在上轉變點以上退火），允許屈服應力的最小值低於20N/mm²。

²) For cold finished tubes in the NBK condition, minimum values of tensile strength lower than these values by 10N/mm² are permitted.

²）對於NBK條件下的冷加工管，允許抗拉強度的最小值低於這些值10N/mm²。

The main products of steel / steel grade鋼材/鋼級的主要日皮视频APP下载

• DIN1629 ST37.0
• DIN1629 ST44.0
• DIN1629 ST52.0

Size range(mm)尺寸範圍（mm）

• Out diameter:10-324mm  外徑：10-324mm
• Wall Tickness:1-30mm  牆體厚度：1-30mm
• Length:14000mm max  長度：最大14000mm

Din 1629 seamless steel pipes application fields are: chemical plant, vessels, pipework construction and for common mechanical engineering purposes. Normally DIN 1629 standard are manufactured with no limiting working pressure values. Working temperature is limited below 300℃.

Din 1629無縫鋼管的應用領域有：化工廠、容器、管道工程施工和常見的機械工程用途。通常，DIN 1629標準製造時沒有限製工作壓力值。工作溫度限製在300℃以下。