dIN 1629

DIN-1629-STEEL-PIPE

DIN 1629 Steel Pipe

DIN 1629 is a standard that specifies the Seamless Circular Tubes of Non-Alloys Steels with Special Quality Requirements. This standard is germane to seamless steel pipes that are primarily used in the construction of chemical plants, vessels, pipework, and for general mechanical engineering purposes. These tubes are designed to meet high-performance requirements, ensuring that they can handle the demands of overheated boilers, act as heat exchangers via austenitic pipes, and serve as minimum-thickness ferrite and seamless steel pipes. With UNIACERO, you’re not just getting a product; you’re investing in quality, durability, and reliability.

DIN 1629 Specification

Our DIN 1629 steel pipes come with a range of specifications that include various dimensions, production procedures, steel grades, surface coatings, end types, joint methods, and machining services. These tubes are crafted to meet the highest standards, ensuring that they can withstand challenging environments and deliver optimal performance consistently.

Production StandardDIN1629
Manufacturing ProcessesSMLS (factured by hot or cold rolling, hot pressing or hot andcold drawing.)
Outside Diameter10.2mm – 813mm (1/8″ – 26″)
Wall Thickness1.8mm – 30mm
Pipe Length6 meters, 12 meters or customized.
Steel GradeDIN 1629 St37.0
DIN 1629 St44.0
DIN 1629 St52.0
Corrosion PreventionLacquer, Varnish, Oiling, Galvanizing
End ProcessesSquare Cut, Bevelling, Threading, Grooving
Further ProcessingWelding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

DIN 1629 Dimension Table

schematic-diagram-of-pipe-dimension

Every dimension of our DIN 1629 steel pipes is meticulously measured and crafted to ensure precision. From the outer diameter to the wall thickness, each specification is designed to meet the unique needs of our clients, ensuring that they get a product that fits perfectly into their requirements.

Outside DiameterTube Thickness (mm)
mm1.61.822.32.62.93.23.64.04.555.66.37.18.08.8101112.514.21617.52022.225283032364045505560657075808590100
10.2
13.5
16
17.2
19
20
21.3
25
25.4
26.9
30
31.8
33.7
38
42.4
44.5
48.3
51
54
57
60.3
63.5
70
73
76.1
82.5
88.9
101.6
108
114.3
127
133
139.7
152.4
159
168.3
177.8
193.7
219.1
244.5
273
323.9
355.6
406.4
457
508
559
610
660

Chemical Requirements of DIN 1629

Our DIN 1629 steel pipes are made of unalloyed steel, ensuring a pure and robust composition. This chemical composition guarantees the longevity and durability of our products, ensuring that they remain rust-free and maintain their strength even in the most challenging environments.

Steel GradeChemical Composition % by Mass
SymbolMaterial NumberType of Deoxidization(R,Killed(Including Semi-Killed)RR,Fully Killed)CPSNAddition of Nitrogen Fixing Elements(e.g.not less than 0.020%Altotal)
St 37.01.0254R0.170.040.040.009
St 44.01.0256R0.210.040.040.009
St 52.01.0421RR0.220.040.035Yes

Mechanical Requirements of DIN 1629

The mechanical properties of our DIN 1629 steel pipes, such as tensile strength, yield strength, and elongation, are optimized to ensure that they can withstand high pressures and temperatures. This makes them ideal for a range of applications, from construction to chemical processing.

Steel GradeUpper Yield Stress ReH For Wall Thickness,in mmTensile Strength RmElongation After Fracture
up to 16Over 16 up to 40Over 40 up to 65LongitudinalTransverse
SymbolMaterial NumberN/mm2 minN/mm2% min
St 37.01.0254235225215350 to 4802523
St 44.01.0256275265255420 to 5502119
St 52.01.0421355345335500 to 6502119

Steel Grades in DIN 1629

We offer DIN 1629 steel pipes in various grades, including St37.0, St44.0, and St52.0. Each grade is tailored to meet specific requirements, ensuring that our clients get a product that is perfectly suited to their needs.

Our Advantages

  1. Over 25 years of experience in pipeline production and installation.
  2. Comprehensive inspection equipment.
  3. Independent product serial numbers for traceability.
  4. Advanced production equipment – Seamer high-frequency welding machine from the United States.
  5. Complete qualifications – API 5L/API 5CT/FM/UL fire pipe certification, etc.
  6. Wide range of products – independently developed solar torque tubes, highly favored in the European market.
  7. Customers spread across the globe.
  8. Excellent after-sales service and sense of responsibility.

Application Scenarios

Our steel pipes are engineered to withstand high temperatures, corrosive environments, and varying pressures, ensuring reliability and safety in the complex petrochemical processes. 

Whether it’s transferring crude oil, natural gas, or chemical intermediates, the robustness and versatility of steel pipes make them indispensable components of the plant’s infrastructure, contributing to efficient production and maintenance of stringent safety standards.

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