Threaded Reducing Tee ASTM A815 UNS S41000 Martensitic Stainless Steel 2" SCH80 ASME B16.11
Threaded Reducing Tee ASTM A815 UNS S41000 Martensitic Stainless Steel 2" SCH80 ASME B16.11
1. Product Description
This product is a threaded reducing tee manufactured from UNS S41000 martensitic stainless steel (Type 410) in accordance with ASTM A815 and ASME B16.11 standards. ASTM A815 specifically covers wrought ferritic, ferritic/austenitic, and martensitic stainless steel pipe fittings, confirming that S41000 is a recognized martensitic grade for such applications . Type 410 is a general-purpose martensitic stainless steel containing approximately 11.5-13.5% chromium, offering high strength and good corrosion resistance in mild environments . A reducing tee has three outlets with the branch outlet being a smaller size than the run . This 2" x 2" x 1.5" SCH80 Class 3000# fitting is designed for NPT threaded connections in small-bore piping systems.
2. Key Product Parameters
| Parameter | Details / Range |
|---|---|
| Material Standard | ASTM A815 / ASME SA815 |
| Dimensional Standard | ASME B16.11, MSS SP-79, BS 3799 |
| Material Grade | UNS S41000 (Type 410 Martensitic Stainless Steel) |
| Type | Threaded Reducing Tee (2" run x 1.5" branch) |
| Run Size | 2" (DN50) |
| Branch Size | 1.5" (DN40) |
| Wall Thickness | Schedule 80 (SCH80/XS) |
| Pressure Class | Class 3000# |
| Thread Type | NPT (ASME B1.20.1) |
| Chemical Composition | Cr: 11.5-13.5%, C: ≤0.15%, Mn: ≤1.0%, Si: ≤1.0%, Ni: ≤0.75% |
| Tensile Strength (min) | 450 MPa (65 ksi) |
| Yield Strength 0.2% (min) | 205 MPa (30 ksi) |
| Elongation (min) | 20% |
| Hardness (max) | 217 HBW / 95 HRB |
| Density | ~7.8 g/cm³ |
| Maximum Service Temp | ~650°C (for scaling resistance) |
3. Application / Usage
This reducing tee is ideal for applications requiring high strength and mild corrosion resistance:
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Oil & Gas: Valve and pump connections, wellhead equipment, gas processing where sour service requirements are met
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Power Generation: Steam and gas turbine components, furnace parts
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Chemical Processing: Mild acids and alkalies, fresh water systems
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Pulp and Paper: Process piping requiring high strength
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General Industry: High-strength fittings for low-corrosion environments
4. Advantages
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High Strength: Martensitic structure provides good mechanical properties, often used when high strength is required
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Heat Resistance: Good scaling resistance up to 650°C
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Cost-Effective: Lower alloy content compared to austenitic and duplex grades offers significant material cost savings
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Threaded Convenience: NPT connection eliminates welding; fast installation and easy disassembly for maintenance
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Reducing Function: Branch outlet (1.5") allows size reduction directly at the tee junction
5. Functions
The threaded reducing tee connects three sections of pipe in a T-shaped configuration with the branch outlet smaller than the run. It enables fluid to be divided from a larger main pipe (2") into a smaller branch pipe (1.5"), or combined from a smaller branch into a larger main line, providing a permanent, leak-proof junction point in small-bore threaded piping systems.
6. Installation Instructions
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Preparation: Clean pipe threads and tee threads thoroughly; remove all dirt, oil, and debris
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Thread Sealant: Apply PTFE tape or pipe dope to male threads to ensure a reliable seal
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Thread Engagement: Screw the tee onto the connecting pipe ends by hand, then tighten with a wrench to appropriate torque
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Avoid Over-tightening: Do not exceed recommended torque to prevent cracking the fitting body
7. Precautions
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Thread Compatibility: NPT, BSPT, and BSPP threads are not interchangeable; verify thread type per system specification
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Temperature Limitation: Temperatures of 400-580°C should be avoided, as the material tends to lose mechanical properties due to over-tempering and reduced impact resistance
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Corrosion Resistance: Type 410 has lower corrosion resistance than austenitic grades; verify suitability for specific service environment
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Sour Service: When used in sour service, Type 410 requires a maximum hardness of 22 HRC and double tempering at ≥621°C per NACE requirements
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Vibration Sensitivity: Threaded fittings are not recommended on lines subject to significant vibration, thermal shock, or hazardous fluid service
8. Shipping & Delivery
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Standard delivery time is typically 15–30 days, subject to order quantity and specification availability.
9. Payment Terms
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Common international payment methods include T/T (Telegraphic Transfer) and L/C at sight (Letter of Credit).
10. Packaging
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Products are securely packed in plywood cases or wooden crates with internal cushioning to ensure safe transportation and prevent damage during transit.
11. After-Sales / Return & Warranty Policy
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All products undergo strict quality inspection before shipment, with Mill Test Certificates (EN 10204 3.1/3.2) available.
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In case of quality issues, retain original packaging and provide relevant photos or third-party inspection reports.
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Specific return, exchange, and warranty terms are subject to the final sales contract agreement.
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FAQ
1. Are you trading company or manufacturer ?
We are manufacturer ,You can see the certification.
2. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.
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