DIN 17175 is a specialized technical standard within the German industrial system for heat-resistant seamless steel pipes designed for high-pressure and high-temperature environments. Its core mandate is to provide reliable material solutions for pipelines enduring sustained thermal and mechanical stress in boiler systems and petrochemical installations. The standard's value lies in rigorous requirements for elevated-temperature strength, creep resistance, and long-term oxidation resistance, enabling operation under extreme conditions (450°C to 650°C).
Material System
The standard specifies tiered alloy grades for varying service conditions:
Carbon-manganese steel St35.8 for low-temperature/low-pressure applications (e.g., economizers)
Molybdenum-alloyed steel 15Mo3 for intermediate temperature/pressure superheater tubes (leverages superior creep resistance)
Chromium-molybdenum enhanced alloys (e.g., 13CrMo44) for critical reheater/main steam lines, tackling complex stress-corrosion environments
Manufacturing & Quality Control
Performance assurance hinges on two pillars:
Mandatory seamless rolling process
100% individual non-destructive testing (NDT)
Surface defects (cracks, scaling, folds) are strictly prohibited. Dimensional tolerances-classified for hot-rolled vs. cold-drawn tubes-are precision-defined for outer diameter and wall thickness, ensuring assembly integrity and pressure containment safety.
Core Applications
Focused on critical energy/chemical infrastructure:
Power plant boilers: Essential for heat-transfer components (economizers, superheaters, reheaters) forming secure pathways for high-temperature steam.
Petrochemical systems: Widely deployed in pyrolysis furnaces, hydroprocessing reactors, and heat exchanger networks-acting as arterial links in high-temperature processes.
Global Standard Alignment
Positioned as a foundational specification alongside:
China's GB 5310
U.S. ASME SA210/SA213
Chemical Compositions of DIN 17175 steel Tubes
Mechanical Properties of DIN17175 steel Tubes
Packing:
Inner packing:Caps on two ends of every pipe
Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers' requirements.
Surface treatment:Oil-dip, Varnish,Passivation, Phosphating, Shot Blasting.
Marking: as per custo mer's requirement
