Introduction
Mcneil Instruments Inc. stands among the top global suppliers, manufacturers, and exporters of Stainless Steel 347 Elbow, Tee, and Reducer. As a trusted name in industrial piping solutions, we specialize in producing high-performance SS 347 pipe fittings that meet international standards such as ASTM A403 WP347 and ASME SA403 WP347.
Our Stainless Steel 347 fittings are designed for superior performance in high-temperature and corrosive environments, making them ideal for industries like petrochemicals, power generation, oil and gas, and pharmaceuticals. Whether you require buttweld elbows, tees, reducers, or customized fittings, Mcneil Instruments Inc. ensures top-notch quality, precision engineering, and timely global delivery.
Overview of Stainless Steel 347
Stainless Steel 347, also known by its UNS designation S34700, is a niobium-stabilized austenitic stainless steel developed to resist intergranular corrosion after exposure to temperatures within the chromium carbide precipitation range (800–1500°F). This unique property makes SS 347 an ideal choice for high-temperature service and oxidizing environments.
The alloy contains chromium (Cr) and nickel (Ni) as primary alloying elements, with niobium (Nb) added to prevent carbide precipitation. Compared to Stainless Steel 304 and 321, SS 347 offers enhanced creep strength, oxidation resistance, and thermal stability.
For higher temperature applications, Stainless Steel 347H is recommended due to its higher carbon content, which improves high-temperature strength.
Why Choose Stainless Steel 347 for Pipe Fittings
Stainless Steel 347 is widely used in piping systems where resistance to heat, corrosion, and oxidation is essential. Its niobium stabilization allows it to maintain strength and ductility even during long-term exposure to elevated temperatures.
Key Benefits of SS 347 Pipe Fittings:
- Excellent Corrosion Resistance: Performs well in oxidizing and reducing environments.
- High-Temperature Strength: Retains mechanical properties up to 1500°F (815°C).
- Resistance to Intergranular Corrosion: Prevents sensitization during welding.
- Superior Durability: Long service life with minimal maintenance.
- Good Weldability and Formability: Suitable for complex fabrication requirements.
These properties make SS 347 the preferred material for heat exchangers, boiler tubes, exhaust systems, and refinery piping networks.
Types of Stainless Steel 347 Pipe Fittings
At Mcneil Instruments Inc., we manufacture and supply a complete range of SS 347 buttweld fittings, including Elbows, Tees, Reducers, Caps, Stub Ends, and Crosses — all conforming to ASTM A403 WP347 and ASME SA403 WP347 standards.
Stainless Steel 347 Elbow
SS 347 elbows are used to change the direction of fluid flow in a piping system.
Available in 45°, 90°, and 180° bends, they come in long radius (LR) and short radius (SR) configurations. These elbows are ideal for high-pressure and high-temperature applications in industries like petrochemicals, shipbuilding, and power plants.
Stainless Steel 347 Tee
The SS 347 Tee is used to distribute or combine flow in a pipeline. Mcneil Instruments Inc. manufactures equal tees and reducing tees to meet various connection requirements.
They are essential in complex piping systems where flow direction or volume changes are needed.
Stainless Steel 347 Reducer
SS 347 reducers are available in concentric and eccentric forms, allowing smooth transitions between pipes of different diameters.
Reducers maintain pressure consistency and flow efficiency, preventing turbulence in the piping network.
Other Fittings
We also supply SS 347 Stub Ends, Pipe Caps, Crosses, and Couplings, all tested for mechanical strength and dimensional accuracy. Each fitting undergoes rigorous inspection before dispatch to ensure defect-free delivery.
Manufacturing and Quality Standards
As a globally recognized manufacturer and exporter of Stainless Steel 347 pipe fittings, Mcneil Instruments Inc. adheres to the highest manufacturing and quality control practices.
Our Production Process Includes:
- Raw Material Selection – Only certified stainless steel 347 billets and bars.
- Forging and Machining – Precision forming to exact tolerances.
- Heat Treatment – For enhanced strength and stress relief.
- Testing and Inspection – PMI testing, hydrostatic testing, ultrasonic inspection, and dimensional checks.
Our fittings conform to international standards such as ASTM A403 / ASME SA403 / MSS-SP-43 / DIN / EN / JIS. Mcneil Instruments Inc. also provides mill test certificates, third-party inspections, and ISO certification for global credibility.
Applications and Industries Served
Mcneil Instruments Inc. supplies Stainless Steel 347 Elbows, Tees, and Reducers to industries that demand corrosion resistance and high-temperature durability.
Industries Using SS 347 Fittings:
- Petrochemical and Refinery Plants
- Oil and Gas Processing
- Power Generation and Heat Exchangers
- Chemical and Fertilizer Industries
- Pulp and Paper Manufacturing
- Pharmaceutical and Food Processing Equipment
In these sectors, SS 347 fittings ensure long-term reliability, reduced downtime, and safety in critical operations.
SS 347 vs Other Stainless Steel Grades
When selecting pipe fittings, it’s important to compare SS 347 with other commonly used stainless steel grades.
| Property | SS 304 | SS 316 | SS 321 | SS 347 |
|---|---|---|---|---|
| Stabilizing Element | None | Molybdenum | Titanium | Niobium |
| High-Temp Strength | Moderate | High | High | Excellent |
| Corrosion Resistance | Good | Very Good | Good | Excellent |
| Weldability | Excellent | Excellent | Good | Excellent |
Conclusion:
While SS 304 and SS 316 are popular for general applications, SS 347 offers superior performance under continuous high-temperature service and in environments prone to intergranular corrosion.
Why Choose Mcneil Instruments Inc.
As a leading global supplier and exporter of Stainless Steel 347 pipe fittings, Mcneil Instruments Inc. has earned the trust of clients across Asia, the Middle East, Europe, and North America.
What Sets Us Apart:
- Global Experience: Serving over 60+ countries with consistent quality.
- Comprehensive Inventory: Complete range of SS 347 Elbow, Tee, Reducer, and custom fittings.
- Quality Assurance: Each fitting undergoes stringent quality testing and certification.
- Customization: Fabrication as per client drawings and international standards.
- Competitive Pricing & Timely Delivery: Ensuring value and reliability in every order.
At Mcneil Instruments Inc., our mission is to deliver superior stainless steel fittings that meet the evolving needs of global industries.
Packaging, Delivery & Global Supply
Mcneil Instruments Inc. takes special care to ensure the safe and prompt delivery of all Stainless Steel 347 fittings.
- Packaging: Fittings are packed in export-worthy wooden boxes, bubble wrap, and HDPE covers to prevent damage during transit.
- Labeling: Each package includes clear product details, heat numbers, and batch identification.
- Delivery: Efficient logistics ensure timely dispatches to clients in UAE, Saudi Arabia, Qatar, Singapore, the USA, and Europe.
Our extensive distribution network allows us to meet both bulk and custom orders worldwide.
To learn more about our commitment to quality and industry expertise, visit our About Us page. For inquiries, quotations, or project support, please reach out through our Contact Us page — our team will be glad to assist you.
Conclusion
Stainless Steel 347 Elbow, Tee, and Reducer are critical components in modern piping systems that demand strength, durability, and corrosion resistance. With years of experience, Mcneil Instruments Inc. continues to be a trusted global manufacturer, supplier, and exporter of high-quality SS 347 pipe fittings.
If you’re looking for ASTM A403 WP347 or WP347H pipe fittings that combine performance, precision, and reliability, look no further than Mcneil Instruments Inc.
📞 Contact us today for customized quotations and expert guidance for your industrial piping requirements.
Frequently Asked Questions (FAQ)
Q1: What is Stainless Steel 347 used for?
Industries use SS 347 in high-temperature and corrosive environments such as chemical processing, heat exchangers, and boiler systems because its niobium-stabilized structure ensures excellent stability and corrosion resistance.
Q2: What is the difference between SS 347 and SS 347H?
SS 347H has a higher carbon content than SS 347, providing better high-temperature strength and creep resistance.
Q3: Are SS 347 fittings suitable for welding applications?
Yes, SS 347 is highly weldable and resists carbide precipitation during welding, making it ideal for complex fabrication.
Q4: Does Mcneil Instruments Inc. export SS 347 pipe fittings globally?
Absolutely. Mcneil Instruments Inc. exports to multiple countries worldwide, ensuring prompt delivery and reliable quality standards.
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