Zhejiang Seamless Pipe Co., Ltd.
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability | 1000 ton/month |
| Delivery Time | 2 weeks/container |
| Packaging Details | Bundles in woven bag/plywood case With plastic end caps |
| Available Grades | TP321, TP321H, TP317L, TP310S, TP347H, TP304, TP304H, TP304L, TP316, TP316L, S31803, 2205, 2507 |
| Size Range | OD: 1/4" - 24" | WT: Sch5s - XXS | Length: Max. 6M |
| Manufacturing Method | Seamless (Cold-Drawn) |
| Surface Treatment | Annealed & Pickled |
| Length Options | Standard 6m / Customized available |
| Brand Name | SMLSCO |
| Certification | ISO, PED certified |
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Product Specification
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram | Supply Ability | 1000 ton/month |
| Delivery Time | 2 weeks/container | Packaging Details | Bundles in woven bag/plywood case With plastic end caps |
| Available Grades | TP321, TP321H, TP317L, TP310S, TP347H, TP304, TP304H, TP304L, TP316, TP316L, S31803, 2205, 2507 | Size Range | OD: 1/4" - 24" | WT: Sch5s - XXS | Length: Max. 6M |
| Manufacturing Method | Seamless (Cold-Drawn) | Surface Treatment | Annealed & Pickled |
| Length Options | Standard 6m / Customized available | Brand Name | SMLSCO |
| Certification | ISO, PED certified | ||
| High Light | Annealed ASTM A312 Seamless Pipe ，Pickled ASTM A312 Seamless Pipe ，Power Generation ASTM A312 Pipe | ||
|
Grade |
TP321;TP321H; TP317L; TP310S; TP347H, TP 304; TP304H; TP304L; TP316; TP316L; S31803, 2205, 2507, |
| Standard | ASTM A312, etc |
| Size | OD: 1/4" – 24" |
| WT: Sch5s – XXS | |
| Length:Max.6M | |
|
Manufacturing Method
|
Seamless (Cold-drawn) |
|
Surface Treatment
|
Annealed & Pickled |
|
Length
|
Standard 6m / Customized available
|
|
Certification
|
ISO, PED certified |
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:
Piercing →
Multi-pass cold drawing →
Solution annealing →
Pickling & passivation →
Straightening →
Eddy current testing →
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.
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2006
Employee Number:
100~150
Ecer Certification：
Verified Supplier
Zhejiang seamless pipe co.,ltd. (SMLSCO) is a specialized stainless steel piping systems provider with 18 years of industry experience. We began by supplying cost-effective stainless steel seamless pipes but for now, Smlsco is more than pipes.With 18 years of growth, we have established production c... Zhejiang seamless pipe co.,ltd. (SMLSCO) is a specialized stainless steel piping systems provider with 18 years of industry experience. We began by supplying cost-effective stainless steel seamless pipes but for now, Smlsco is more than pipes.With 18 years of growth, we have established production c...
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