DIN 17175, published by the German Institute for Standardization (DIN), is a well-known standard for heat-resistant seamless steel pipes, officially titled "Seamless Tubes of Heat-resistant Steels - Technical Conditions of Delivery." This standard applies to
seamless steel pipes made of heat-resistant steel, primarily used in critical equipment such as boilers, pipelines, and pressure vessels, with operating temperatures up to 600°C. It clearly specifies the yield strength, creep strength, and endurance strength of the material at high temperatures, which is its most fundamental difference from ordinary steel pipe standards.
Current Status:
DIN 17175 was superseded by the unified European standard (EN 10216-2) in the 2000s. Although obsolete, DIN 17175 has had a profound historical impact. Its specified steel grades (such as St35.8, St45.8, 15Mo3, 13CrMo44, etc.) and strict quality grading concepts are still widely cited and recognized in the global industrial field.
The DIN 17175 standard also introduces the concept of quality grades, for example:
Grade I: Basic requirements, applicable to operating conditions with temperatures ≤450℃ and pressures ≤80 bar.
Grade III: Higher requirements, specifying clear requirements for 100% non-destructive testing of the steel pipes (such as ultrasonic testing), more stringent heat treatment, and performance indicators, applicable to harsh conditions such as >450℃ or high pressure.
DIN 17175
high-pressure boiler tubes are thermal piping materials used in boiler equipment, mainly suitable for low and medium pressure boilers with operating pressures ≤5.88 MPa and operating temperatures ≤450℃, and for high-pressure boiler heating surface components with operating pressures ≥9.8 MPa and operating temperatures 450-600℃.
This product conforms to Chinese standards GB3087 and GB5310, American standards ASME SA210 and SA213, and German standard DIN 17175. The outer diameter tolerance is ±0.3mm, the wall thickness ranges from 0.5 to 8.0mm, and the tensile strength is 335 to 475MPa. Production grades include 20G, 15CrMoG, SA210C, and 13CrMo44 series, covering carbon steel, chromium-molybdenum steel, and alloy steel types. Its applications cover boiler economizers, superheaters, reheaters, and petrochemical industry piping systems.
