DIN 2440 is the German industrial standard for steel tubes that specifies the technical requirements for medium-weight threaded steel tubes

DIN 2440是德國鋼管工業標準，規定了中等重量螺紋鋼管的技術要求

DIN 2440 is the German industrial standard for steel tubes that specifies the technical requirements for medium-weight threaded steel tubes, also known as black and galvanized steel tubes or pipes. This standard was first published in 1962 and later revised in 1978. DIN 2440是德國鋼管工業標準，規定了中等重量螺紋鋼管的技術要求，也稱為黑色和鍍鋅鋼管或管道。該標準於1962年首次發布，隨後於1978年進行了修訂。

The DIN 2440 standard covers a range of threaded steel tubes made from non-alloyed and low-alloyed steels, with diameters ranging from 20mm to 165mm and wall thicknesses ranging from 1.8mm to 6.3mm. These steel tubes are commonly used in the construction of pipelines and plumbing systems for conveying gas, air, water, and other fluids.

DIN 2440標準涵蓋了一係列由非合金鋼和低合金鋼製成的螺紋鋼管，直徑範圍為20mm至165mm，壁厚範圍為1.8mm至6.3mm。這些鋼管通常用於建造輸送氣體、空氣、水和其他流體的管道和管道係統。

The technical requirements laid out in DIN 2440 include chemical composition, mechanical properties, dimensional tolerances, and testing methods, among others. For example, the standard specifies the maximum permissible carbon content of the steel tubes, which should not exceed 0.17%, and sets out the minimum values for tensile strength and elongation.

DIN 2440中規定的技術要求包括化學成分、機械性能、尺寸公差和測試方法等。例如，該標準規定了鋼管的最大允許碳含量，不應超過0.17%，並規定了抗拉強度和伸長率的最小值。

In addition, DIN 2440 also includes requirements for the surface finish of the steel tubes, particularly for galvanized tubes, which should have a uniform zinc coating to protect against corrosion.

此外，DIN 2440還包括對鋼管表麵光潔度的要求，特別是鍍鋅管，鍍鋅管應具有均勻的鍍鋅層以防止腐蝕。

DIN 2440 is an important industrial standard for steel tubes used in plumbing and pipeline systems, providing technical specifications and quality requirements for threaded steel tubes made from non-alloyed and low-alloyed steels.

DIN 2440是管道和管道係統中使用的鋼管的重要工業標準，為非合金鋼和低合金鋼製成的螺紋鋼管提供了技術規範和質量要求。

There are different forms to the pipes such as polished, annealed and pickled, bright and annealed types. The Carbon Steel DIN 2440 St 33-2 Seamless Tubes can come with different pipe ends such as plain end, beveled end, threaded pipe and tube types. The applications are in oil, gas, fluid transfer lines and in heat exchanger and boiler components. The DIN 2440 Grade St 33-2 Round Pipes are the most used ones where the other forms such as square pipes are available. The chemical composition of the pipes contains carbon, silicon, manganese, chromium, nickel and molybdenum. The DIN 2440 Steel Pipes have 185MPa minimum yield strength and 310MPa minimum tensile strength.

管道有不同的形式，如拋光、退火和酸洗、光亮和退火類型。碳鋼DIN 2440 St 33-2無縫管可配備不同的管端，如平端、斜端、螺紋管和管類型。應用於石油、天然氣、流體輸送管線以及熱交換器和鍋爐部件。DIN 2440 St 33-2級圓管是使用最多的圓管，其他形式如方管也可用。管道的化學成分包括碳、矽、錳、鉻、鎳和鉬。DIN 2440鋼管的最小屈服強度為185MPa，最小抗拉強度為310MPa。Please feel free to contact us for a full price list and other information on the DIN 2440 ST33.2 Carbon Steel Tube products.

DIN 2440 ST33.2碳鋼管日皮视频APP下载的列表和其他信息。

DIN 2440 Threaded Steel Tubes have internal threads that permit easy and speedy, leakproof connections. Threaded components like the din 2440 st 35 pipes are used in areas that cannot be welded. In some industries, the use of welding to connect a tube to fittings or flanges could cause undesirable flares or explosions, which are hazardous to both the application and the environment. The internal threads in the din 2440 Steel pipe aid in easy mounting or connectivity to a piping system without causing any accidents. Therefore, several industries, including the oil and gas industries may use these din 2440 st33 pipes for connectivity. Another reason that many businesses have carbon steel pipes in grade din 2440 st 33.2 as a part of their piping system is that they have good hardness properties. To improve these properties, often buyers place in an order for carburization or nitriding to be carried out on the carbon steel din 2440 tube. Both these processes ensure that the tubes become hard without becoming brittle.

DIN 2440螺紋鋼管具有內螺紋，可實現簡單、快速、防漏的連接。螺紋部件，如din 2440 st 35管，用於無法焊接的區域。在某些行業中，使用焊接將管道連接到配件或法蘭可能會導致不希望的火焰或爆炸，這對應用和環境都是危險的。din 2440鋼管中的內螺紋有助於輕鬆安裝或連接到管道係統，而不會造成任何事故。因此，包括石油和天然氣行業在內的多個行業可能會使用這些din 2440 st33管道進行連接。許多企業將din 2440 st 33.2級碳鋼管作為其管道係統的一部分的另一個原因是它們具有良好的硬度性能。為了提高這些性能，買家通常會訂購對碳鋼din 2440管進行滲碳或滲氮處理。這兩個過程都確保了管子變硬而不會變脆。

Material Specification of DIN 2440  DIN 2440材料規範

DIN 2440 Grade St 33-2 Carbon Steel Seamless Tubes and DIN 2440 st 35 Steel pipe with smooth tube ends DIN 2440 St 33-2級碳鋼無縫管和DIN 2440 St 35鋼管，管端光滑

Nominal Diameter (ND): 6, 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 125 mm (1/8, 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 4, 5 inch)

Outside Diameter (OD): 10,2 - 139,7 mm

Wall Thickness: DIN 2440: 2 - 4,6 mm;
DIN 2441: 2,65 - 5,40 mm

Dimension Standard of DIN 2440 DIN 2440尺寸標準

DIN 2440 Steel Tubes Sizes  DIN 2440鋼管尺寸

Threaded tube DIN 2440 Wall Thickness螺紋管DIN 2440壁厚