TP321 Material Properties
TP321 features titanium stabilization to effectively prevent intergranular corrosion, making it ideal for high-temperature cyclic applications above 450 °C. With oxidation resistance up to 950 °C, it maintains excellent weldability and medium-to-high pressure strength – delivering a reliable solution for high-temperature steam lines in power generation.

SMLSCO Product Advantages
SMLSCO stocks 2,000 tons of seamless pipes, including full-range TP321 thick-walled options. Standard sizes ship within two weeks. Bulk raw material sourcing reduces costs, while ISO+PED compliance with 100% factory testing and photo documentation helps distributors shorten procurement cycles and minimize inspection risks.

TP321 Seamless Pipe Manufacturing Process
TP321 pipe undergoes a 7-stage process:

1. Piercing →

2. Multi-pass cold drawing →

3. Solution annealing →

4. Pickling & passivation →

5. Straightening →

6. Eddy current testing →

7. Final inspection

Computer-controlled annealing ensures optimal titanium stabilization. Pickling removes scale while passivation enhances surface cleanliness – meeting stringent requirements for high-temperature steam systems.

Quality Control System
Implementing:
• Raw material PMI verification
• In-process EC/UT non-destructive testing
• 100% dimensional inspection
All test records and photos are traceable with available SGS/TUV sampling reports. Our three-tier QC system guarantees consistent composition and stable performance across every TP321 batch, streamlining distributors' incoming inspection.

TP321 Seamless Pipe Application in Power Generation

TP321 seamless pipes perform well in power plant systems because the stability of titanium can prevent intergranular corrosion in steam pipelines at 450-800 ° C. The oxidation resistance at 950 ° C can withstand exposure to boilers or heat exchangers, while its strength maintained at medium and high pressures ensures the integrity of the steam containment vessel. The consistent weldability of 321 simplifies the modification of turbine pipelines.
The controlled manufacturing of 321 pipeline through solution annealing ensures the formation of titanium carbide and eliminates sensitization during long-term thermal cycling. These features minimize the risk of stress corrosion cracking in the feedwater system and turbine bypass pipelines, reducing unplanned shutdowns.

Zhejiang seamless pipe co.,ltd. (SMLSCO) is a specialized stainless steel piping systems provider with 19 years of industry experience. We began by supplying cost-effective stainless steel seamless pipes but for now, Smlsco is more than pipes.

With 19 years of growth, we have established production centers, warehouses, and sales offices strategically located in Wenzhou and Jiaxing. This strategic layout brings us closer to China's steel industry and economic hubs, enabling us to offer a wider range of products and provide more professional and efficient services to our customers.

SMLSCO’s extensive inventory and years of experience enable us to deliver high-quality stainless steel products on time, every time,and lead to long-term partnerships with clients from over 100 countries and regions.