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

DIN 1629具有特殊质量要求的非合金钢无缝圆管德国标准。

What is DIN 1629?什么是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是德国标准，规定了非合金钢无缝圆钢管的要求。这些管子主要用于机械和一般工程目的，但不适合热处理或压力目的。DIN 1629的关键点包括：

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

DIN 1629是规定具有特殊质量要求的非合金钢无缝圆管的标准。

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

DIN 1629适用于过热锅炉，如最小厚度的铁素体和无缝钢管，以及通过奥氏体管道的热交换器。

Material Grades材料等级

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

Dimensions尺寸

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

该标准规定了管子的外径、壁厚和允许公差。

Mechanical Properties机械性能

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

机械性能包括抗拉强度、屈服强度和伸长率，这些性能因材料等级而异。

Chemical Composition化学成分

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

使用的钢材必须符合特定的化学成分限制，包括碳、锰、磷和硫含量。

Manufacturing Process制造工艺

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

管材必须采用无缝工艺制造，可以是热加工或冷加工。

Testing Requirements测试要求

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

需要进行各种测试来确保管子的质量，包括拉伸测试、压扁测试和硬度测试。

Note笔记

• DN — Nominal Diameter  DN——公称直径
• NPS —Nominal Pipe Size  ·NPS——公称管道尺寸

Field of application应用领域

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本标准适用于表1所列非合金钢制成的无缝圆管（以下简称“管”）。这些管子主要用于化工厂、容器、管道工程和一般机械工程。它们旨在满足高性能要求。通常，这些管子没有限制值或最大允许工作压力。附录A中规定了允许的工作温度不得超过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)

本标准中给出的应用范围和其他规范应适用，除非其他规范包含在特定应用领域的实施规范中，例如《蒸汽锅炉技术规则》（TRD）或《Druckbehalter技术规范》（TRB）

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

（压力容器技术规则），AD Merkblast（AD说明表）。

Chemical composition of steels for seamless circular tuves subject to special repuirements有特殊要求的无缝圆管用钢的化学成分

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） 如果观察到磷含量低于每0001%N 0005%P规定的最大值，则允许含量超过开始的最大值。然而，在铸件分析中，氮含量不得超过0.012%，在产品分析中不得超过0014%。

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

2） 如果钢材采用RR（而不是R）型脱氧，则指定的最大值不适用

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） 铸件分析中的硅含量不得超过0.55%，锰含量不得超过1.06%，产品分析中的锰含量不得高于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。产品分析中的化学成分可能偏离适用于铸件分析的极限值的量{见表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）如果观察到磷含量低于每0001%N 0005%P规定的最大值，则允许存在超过规定最大值的污染物。然而，在铸件分析中，氮含量不得超过0012%，在产品分析中不得超过0014%（这不适用于RR型脱氧）。

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。室温下交付状态下管子的机械性能对于壁厚超过65mm的管子，应在订购时商定这些值

Steel-chemical composition (DIN1629)钢化学成分（DIN1629）

Mechanical Properties(Mpa)机械性能（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）对于NBK条件下的冷加工管（在保护气体或真空中在上转变点以上退火），允许屈服应力的最小值低于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）对于NBK条件下的冷加工管，允许抗拉强度的最小值低于这些值10N/mm²。

The main products of steel / steel grade钢材/钢级的主要产品

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

Size range(mm)尺寸范围（mm）

• Out diameter:10-324mm  外径：10-324mm
• Wall Tickness:1-30mm  墙体厚度：1-30mm
• Length:14000mm max  长度：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无缝钢管的应用领域有：化工厂、容器、管道工程施工和常见的机械工程用途。通常，DIN 1629标准制造时没有限制工作压力值。工作温度限制在300℃以下。