DIN 1629 Seamless Steel pipe Of Non Alloys Steels are made of unalloyed steels, it's main grades are St 37.0, St44.0, St52.0.
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 is the standard specifies the Seamless Circular Tubes of Non Alloys Steels with Special Quality Requirements.
DIN 1629 applications the overheated boilers, as minimum thickness ferrite and seamless steel pipes, and as heat exchangers via austenitic pipes.
Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
Note:
DN — Nominal Diameter
NPS —Nominal Pipe Size
Grade | C | Si | Mn | P | S |
ST37.0 | ≤0.17 | / | / | ≤0.040 | ≤0.040 |
ST44.0 | ≤0.21 | / | / | ≤0.040 | ≤0.040 |
ST52.0 | ≤0.22 | ≤0.55 | ≤1.70 | ≤0.040 | ≤0.035 |
Grade | Yield Strength (Mpa) |
Tensile Strength (Mpa) |
Elongation (%)L |
Elongation (%)T |
ST37.0 | ≥235 | 350-480 | 25 | 23 |
ST44.0 | ≥275 | 420-550 | 21 | 19 |
ST52.0 | ≥355 | 500-650 | 21 | 19 |
Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.
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