Adinox Overseas is a leading Stainless Steel 304H Seamless & Welded Pipes Spools manufacturer, delivering products that are engineered for superior performance in high-temperature and pressure environments. These pipe spools are produced using premium-grade raw materials and advanced manufacturing techniques to ensure excellent mechanical strength, enhanced creep resistance, and long service life in demanding industrial conditions.
As a globally recognized Stainless Steel 304H Seamless & Welded Pipes Spools exporter, Adinox Overseas caters to international markets with precision-fabricated spools that meet ASTM, ASME, and international quality standards. Our products are widely exported for use in power plants, petrochemical facilities, refineries, and heat exchanger systems where consistent performance at elevated temperatures is critical.
We are reliable Stainless Steel 304H Seamless & Welded Pipes Spools suppliers, offering customized spool solutions based on client drawings, dimensions, and project requirements. Known for excellent weldability and oxidation resistance, SS 304H pipe spools supplied by Adinox Overseas provide long-term operational reliability in aggressive industrial environments.
Adinox Overseas also operates as dependable Stainless Steel 304H Seamless & Welded Pipes Spools stockists, maintaining a ready inventory to ensure quick delivery and reduced project downtime. Our stocked spools undergo strict quality checks, dimensional inspections, and surface finishing processes to guarantee defect-free installation and smooth system integration.
| Material Grade | Stainless Steel 304H (AISI 304H / UNS S30409 / WNR 1.4948) |
|---|---|
| Product | Pipe Spools (fabricated from seamless or welded stainless steel 304H pipes and fittings) |
| Material Description | High‑carbon austenitic stainless steel for high‑temperature service; improved creep strength vs 304/304L |
| Applicable Standards (typical) | ASTM A312 (Seamless & Welded Austenitic SS Pipes, Grade TP304H), ASTM A182 (Forged Fittings & Flanges), ASME B36.10 / B36.19 (Pipe Sizes), ASME B16.9 / B16.11 / B16.5 (Fittings & Flanges) |
| Size Range (NPS) | ½" – 24" (larger sizes on request) |
| Schedules | Sch 5S, 10S, 20, 40 / 40S, 80 / 80S, 160, XXS (as per design) |
| Pipe Type | Seamless / ERW / EFW (as specified) |
| End Connections | Plain End (PE), Beveled End (BE), Threaded (NPT/BSP), Flanged, as per design |
| Fabrication | Cutting, fit‑up, welding, beveling, pickling/passivation, hydrotest as required |
| Welding | SMAW / GTAW (TIG) / GMAW (MIG), qualified WPS/PQR & certified welders |
| Heat Treatment | Solution annealed and rapidly cooled; heat treatment as per ASTM / design code for high‑temperature service |
| NDT & Inspection (typical) | Visual, dimensional, hydrotest, radiography / DPI / PMI as per client spec |
| Corrosion Protection | Pickled & passivated, end caps, wrapping & packaging for shipment |
| Element | C | Mn | Si | P | S | Cr | Ni | N |
|---|---|---|---|---|---|---|---|---|
| Content (% by weight) | 0.04 – 0.10 | ≤ 2.00 | ≤ 1.00 | ≤ 0.045 | ≤ 0.030 | 18.0 – 20.0 | 8.0 – 11.0 | ≤ 0.10 |
| Property | Value (Metric) | Value (Imperial) | Remarks |
|---|---|---|---|
| Tensile Strength, min. | 515 MPa | 75 ksi | Longitudinal, at room temperature |
| Yield Strength, 0.2% offset, min. | 205 MPa | 30 ksi | Longitudinal, at room temperature |
| Elongation in 50 mm (2 in.), min. | 35 % | 35 % | Gauge length 50 mm (2 in.), longitudinal |
| Modulus of Elasticity (approx.) | 193 GPa | 28 × 106 psi | At 20 °C |
| Density (approx.) | 7.9 g/cm³ | 0.285 lb/in³ | For austenitic stainless steels |
| Hardness (typical, annealed) | ≤ 201 HB | ≈ 92 HRB | Reference value; check project specification |
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