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Home > Stainless Steel >Stainless Steel 347 and 347H Instrumentation Tubing
Stainless Steel 347 and 347H Instrumentation Tubing is engineered for precision, durability, and stability in demanding industrial systems. These stabilized stainless steel grades are enriched with niobium to resist carbide precipitation, ensuring dependable performance in high-temperature and corrosive environments. Designed for instrumentation, control systems, and fluid handling setups where accuracy and reliability matter most, this tubing offers exceptional resistance to oxidation and stress cracking. Its smooth, consistent internal surface enhances flow integrity and reduces contamination. Ideal for petrochemical plants, refineries, power generation units, and pharmaceutical facilities, 347/347H instrumentation tubing ensures high-quality, long-lasting performance.
Stainless Steel 347 and 347H Instrumentation Tubing contains chromium (17–19%), nickel (9–13%), and niobium for superior stabilization and resistance to intergranular corrosion. Grade 347H includes increased carbon content, providing enhanced strength at elevated temperatures. These grades deliver excellent oxidation resistance up to 900°C and offer reliable tensile strength, creep resistance, and structural stability under thermal stress. Their smooth, controlled microstructure supports precise instrumentation performance. Corrosion resistance, heat tolerance, and mechanical reliability make these tubings suitable for systems requiring accurate pressure, flow, and temperature measurement.
| Grade | Range | Ni | C | Cr | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|
| 347 | Min. | 9.0 | – | 17.0 | – | – | – | – |
| Max. | 13.0 | 0.08 | 20.0 | 2.00 | 1.00 | 0.040 | 0.030 | |
| 347H | Min. | 9.0 | 0.04 | 17.0 | – | – | – | – |
| Max. | 13.0 | 0.10 | 19.0 | 2.00 | 1.00 | 0.045 | 0.030 |
| Grade | Tensile Strength min (MPa) | Yield Strength 0.2% Proof min (MPa) | Hardness | Elongation (% in 50mm) min | |
|---|---|---|---|---|---|
| Brinell max (HB) | Rockwell B max (HR B) | ||||
| 347/347h | 515 | 205 | 201 | 92 | 40% |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Choosing Stainless Steel 347 and 347H Instrumentation Tubing from Rashdan Pipes and Tubes ensures high quality and durability, as these pipes offer excellent corrosion resistance and strength. Our commitment to exceptional service and reliable delivery guarantees customer satisfaction across various industrial applications. Our expertise in stainless steel products ensures you receive a top-tier solution tailored to your needs.
Rashdan Pipes and Tubes, one of the largest suppliers of Stainless Steel 316 and 316L Instrumentation Tubing in Amman, Jordan, offers a comprehensive range of high-quality pipes and tubes suitable for various industrial applications. Their extensive inventory and commitment to exceptional service make them a go-to choice for stainless steel products in the region.
| Grade | UNS No | Old British | Euronorm | Japanese JIS | Swedish SS | GOST | ||
|---|---|---|---|---|---|---|---|---|
| BS | En | No | Name | |||||
| 347 | S34700 | 347S31 | – | 1.4550 | X6CrNiNb18-10 | SUS 347 | 2338 | 08Ch18N12B |
| 347h | S34709 | – | – | 1.4961 | – | SUS 347h | – | – |
Yes, we offer custom sizes for Stainless Steel 347 and 347H Instrumentation Tubing to meet your specific requirements. Our team at Rashdan Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@rashdanpipes.com.
Stainless Steel 347 and 347H Instrumentation Tubing is widely used across industries where precision and durability are essential. This tubing supports control lines, measurement systems, chemical injection lines, and hydraulic or pneumatic operations. It is commonly installed in petrochemical facilities, oil and gas plants, refineries, and high-temperature processing units due to its stability under thermal cycling. The tubing’s excellent corrosion resistance makes it ideal for chemical dosing, analyzer systems, and steam instrumentation. In pharmaceutical and food industries, it ensures clean, contamination-free performance. Its reliability under pressure and temperature variations makes it a preferred choice for critical instrumentation frameworks.
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