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Solution Annealed Extended Life Stainless Steel Straight Tee Butt Weld A403 WP321

  • Solution Annealed Extended Life Stainless Steel Straight Tee Butt Weld A403 WP321
  • Solution Annealed Extended Life Stainless Steel Straight Tee Butt Weld A403 WP321
  • Solution Annealed Extended Life Stainless Steel Straight Tee Butt Weld A403 WP321
  • Solution Annealed Extended Life Stainless Steel Straight Tee Butt Weld A403 WP321
  • Solution Annealed Extended Life Stainless Steel Straight Tee Butt Weld A403 WP321
Place of Origin Zhejiang, China
Brand Name WNRLN
Certification ISO 9001:2015, PED 2014/68/EU, EN 10204 3.1 MTR
Model Number SA321-ST-TEE
Minimum Order Quantity 10 Pieces
Price USD 20-250 / Piece
Packaging Details Seaworthy wooden cases with individual protection and full MTR documentation
Delivery Time 7-10 working days for stock, 20-30 days for production
Payment Terms T/T,L/C,Western Union
Supply Ability 5000 Pieces per Month
Product Details
Product Name Solution Annealed Extended Life Stainless Steel Straight Tee Material Grade ASTM A403 WP321 / UNS S32100 (Titanium Stabilized)
Heat Treatment Solution Annealed At 1050-1120°C, Rapid Water Quench Service Temperature -196°C To +900°C
Design Life 30+ Years Application Thermal Power, Petrochemical Furnace, Heat Treatment Equipment
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Solution Annealed Straight Tee

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Extended Life Pipe Tee

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WP321 Butt Weld Fitting
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Product Description
Solution Annealed Extended Life Stainless Steel Straight Tee Butt Weld A403 WP321
Product Overview

The Solution Annealed Extended Service Life Stainless Steel Straight Tee is manufactured from ASTM A403 WP321 titanium-stabilized austenitic stainless steel, providing exceptional resistance to intergranular corrosion at elevated temperatures up to 900°C. The solution annealing heat treatment at 1050-1120°C followed by rapid quenching ensures complete dissolution of titanium carbides and a fully homogenized microstructure. Titanium stabilization (5*C minimum) provides supplementary protection against sensitization during long-term elevated temperature service.

This combination of WP321 base material and proper solution annealing delivers an extended service life stainless steel straight tee that maintains mechanical integrity and corrosion resistance through decades of thermal cycling in high-temperature process environments. The butt weld straight tee configuration allows full-penetration welding for maximum joint reliability.

Technical Specifications
Parameter Specification
Material Grade ASTM A403 WP321 / UNS S32100 / 1.4541 (Titanium Stabilized)
Heat Treatment Solution Annealed at 1050-1120°C, Rapid Water Quench
Type Straight Tee (Equal Tee)
Size Range 1/2" - 48" (DN15 - DN1200)
Wall Thickness SCH5S, SCH10S, SCH40S, SCH80S, SCH160, STD, XS
Standard ASME B16.9, ASTM A403, MSS SP-43
Temperature Range -196°C to +900°C (with proper allowances)
Chemical Composition C≤0.08, Cr 17.0-19.0, Ni 9.0-12.0, Ti≥5*C
Mechanical Properties Tensile ≥515 MPa, Yield ≥205 MPa, Elongation ≥35%
Service Life Expectancy 30+ Years in Properly Specified High-Temperature Applications
Key Advantages & Application Fields
  • Superior Elevated Temperature Performance: Maintains mechanical properties and intergranular corrosion resistance at temperatures up to 900°C, far exceeding WP304L and WP316L capabilities.
  • Titanium Stabilization Advantage: Titanium addition preferentially combines with carbon to form stable TiC precipitates, preventing chromium carbide formation at grain boundaries.
  • Thermal Power Generation: Ideal for superheater and reheater piping systems, boiler auxiliary piping, and high-temperature steam lines.
  • Petrochemical Furnace Piping: Suitable for ethylene cracking furnace transfer lines, reformer furnace outlet piping, and continuous high-temperature petrochemical processing.
  • Heat Treatment Equipment: Extended service life under cyclic thermal conditions in industrial furnace piping and thermal processing systems.
  • Aerospace Ground Support: High-temperature ground support equipment fluid systems requiring reliable long-term performance.
Frequently Asked Questions
Why choose WP321 over WP304L or WP316L for high-temperature tee applications?
The solution annealed extended service life stainless steel straight tee in WP321 titanium-stabilized grade offers significant advantages over WP304L and WP316L at elevated temperatures. While WP304L and WP316L rely on low carbon content (≤0.03%) to resist sensitization, this protection is effective only up to approximately 400-450°C. At higher temperatures, even low-carbon grades can sensitize over time. WP321's titanium stabilization (Ti ≥5*C) chemically locks up available carbon as stable titanium carbides, preventing chromium carbide precipitation and maintaining intergranular corrosion resistance at temperatures up to 900°C. For applications involving continuous elevated temperature exposure or repeated thermal cycling, the solution annealed WP321 stainless steel straight tee provides decades of reliable service without the risk of intergranular attack that would compromise WP304L or WP316L fittings.
What is the significance of solution annealing for WP321 stainless steel tee fittings?
Solution annealing of the extended service life stainless steel straight tee in WP321 grade is critical for two reasons. First, it dissolves any carbides formed during hot working into solid solution, creating a homogeneous single-phase austenitic microstructure. Second, and specifically important for titanium-stabilized grades, proper solution annealing ensures the Ti:C ratio is optimized - sufficient titanium must remain in solid solution to stabilize carbon that could otherwise form chromium carbides during service. Under-annealing can leave undissolved TiC particles that deplete the matrix of free titanium, reducing stabilization effectiveness. Our solution annealed WP321 stainless steel straight tee is processed with precisely controlled temperature, time, and quench rate to achieve the ideal microstructure for maximum long-term elevated temperature performance.
How does the extended service life of these tees translate to reduced total cost of ownership?
The solution annealed extended service life stainless steel straight tee in WP321 grade reduces total cost of ownership through multiple mechanisms: elimination of premature replacement costs from intergranular corrosion failure; reduced unplanned shutdown frequency in continuous process operations; lower inspection and maintenance burden due to proven material stability; elimination of post-weld heat treatment requirements for most applications; and extended turnaround intervals in high-temperature process units. While the initial material cost of WP321 is typically 15-25% higher than WP304L, the extended service life of 30+ years in demanding high-temperature environments versus potentially 5-10 years for WP304L in the same conditions provides a compelling lifecycle cost advantage for critical service applications.
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steel pipe tee

butt weld tee

stainless steel pipe tee