TSI INOX Conduits presents our industry-leading Rigid Stainless Steel Conduit (RSSC) , engineered to provide the ultimate in mechanical protection and corrosion resistance for critical electrical infrastructure. Manufactured in strict accordance with UL 6A standards, our rigid stainless steel conduit offers the thickest walls and highest impact resistance of any electrical raceway system.
Designed for environments where conduit integrity is non-negotiable—from petrochemical refineries and offshore platforms to heavy manufacturing and underground installations—TSIʼs RSSC delivers unmatched durability, grounding reliability, and long service life in the harshest conditions on earth.
All TSI RSSC is supplied with factory-cut NPT threads on both ends. Field cutting and threading should be performed using high-speed steel dies and appropriate cutting lubricants designed for stainless steel to prevent work hardening.
Refer to NEC Article 344 for support requirements and spacing intervals for rigid metal conduit.
While RSSC is rigid by nature, it can be field-bent using hydraulic or mechanical benders designed for rigid steel conduit. We recommend using our pre-fabricated elbows and bends for precise, consistent radii.
| Specification | Details |
|---|---|
| Standard | UL 6A – Electrical Rigid Metal Conduit – Steel |
| Material Options | 304 Stainless Steel (AISI 304) or 316 Stainless Steel (AISI 316) |
| Finish | Pickling and Passivating (Interior) / Polished #240 (Exterior) |
| Length | 10 ft (3.05m) ± 0.25" (6.35mm) |
| Trade Sizes | ½" through 6" (16mm through 155mm) |
Our precision-threaded rigid stainless steel conduit maintains strict dimensional integrity for seamless installation:
| Parameter | Tolerance |
|---|---|
| Outside Diameter (½" – 1½") | ± 0.050 in (1.2mm) |
| Outside Diameter (2" – 6") | ± 2% |
| Wall Thickness | ± 12.5% |
| Length | ± 0.25" (6.35mm) |
Our 304 stainless steel rigid conduit provides outstanding general-purpose corrosion resistance combined with excellent strength and formability. This austenitic stainless steel grade is ideal for industrial facilities, commercial buildings, and food processing environments where exposure to moderate chemicals and atmospheric moisture is expected. The 304 alloy offers a cost-effective solution for most rigid conduit applications requiring stainless steel protection.
For installations facing extreme corrosive threats, our 316 stainless steel rigid conduit delivers superior protection with its molybdenum-enhanced alloy composition. The 316 stainless steel rigid conduit excels in marine environments, chemical processing plants, pulp and paper mills, and wastewater treatment facilities where chlorides, acids, and saline conditions accelerate corrosion. When you need the highest level of pitting and crevice corrosion resistance, 316 RSSC is the definitive choice.
Our rigorous interior treatment process removes welding scale, iron contamination, and surface impurities while promoting the formation of a passive chromium oxide layer. This enhances the interior corrosion resistance of the rigid conduit, protecting conductors from moisture ingress and maintaining a clean raceway for cable installation.
The exterior #240 polished finish provides a smooth, bright, and aesthetically pleasing surface that resists dirt adhesion and simplifies cleaning. This sanitary finish is particularly valued in pharmaceutical, food-grade, and cleanroom installations, while also enhancing the conduit's resistance to external corrosive agents.
TSIʼs UL 6A rigid stainless steel conduit is the preferred choice for the most demanding applications, including:
Protection against hydrocarbons, sour gas, and aggressive chemicals
Resists salt spray, high humidity, and extreme weather.
Withstands acid fumes, caustic washdowns, and reactive substances
Resists hydrogen sulfide and chlorine exposure
Provides superior impact and crush resistance in high-traffic areas
Excellent durability for underground, encased, and embedded applications
Meets NEC requirements for explosion-proof and intrinsic safety systems
Sanitary, cleanable conduit for hygienic zones
Rugged raceway for high-voltage transmission and distribution
Our TSI Rigid Stainless Steel Conduit meets or exceeds the following international standards and codes:
UL 6A - Electrical Rigid Metal Conduit – Steel
ANSI C80.1 – American National Standard for Electrical Rigid Steel Conduit
ANSI/NFPA 70 – National Electrical Code (NEC) Article 344 – Rigid Metal Conduit
NEMA RN 1 – Polyvinyl Chloride (PVC) Externally Coated Galvanized Rigid Steel Conduit and Intermediate Metal Conduit (for reference/compatibility)
NSF/ANSI 169 – Certified for food equipment applications
RoHS Compliant – Restriction of Hazardous Substances
TSI INOX Conduits provides a comprehensive stainless steel rigid conduit system for unified specification:
The thicker walls of RSSC provide superior protection against impact, crushing, and heavy loads—making it the preferred choice for industrial floors, concrete encasement, and areas subject to physical abuse.
Unlike galvanized carbon steel, stainless steel rigid conduit does not rely on a sacrificial coating. Its inherent alloy composition provides continuous, maintenance-free corrosion protection for decades of service.
The rigid steel construction provides a reliable, low-impedance equipment grounding conductor path, meeting NEC requirements without the need for a separate grounding wire in many installations.
Our rigid stainless steel conduit features precision-cut NPT (National Pipe Taper) threads, ensuring secure, leak-resistant connections with standard threaded couplings, elbows, and conduit bodies.
TSI's stainless steel RSSC eliminates the lifecycle costs associated with corrosion-related failures, maintenance, and replacements—providing a true "install and forget" solution for mission-critical infrastructure.
Stainless steel rigid conduit maintains structural integrity at elevated temperatures, making it suitable for high-heat zones and fire-resistive applications.
TSI INOX Conduits manufactures every length of rigid stainless steel conduit using premium raw materials and state-of-the-art production processes. Our commitment to quality ensures consistent wall thickness, accurate threading, and flawless finishes in every shipment.
Based in India with a worldwide export network, TSI INOX Conduits delivers rigid stainless steel electrical conduit solutions to projects across North America, Europe, the Middle East, and beyond.
Our technical experts provide application assistance, code compliance guidance, and custom solutions to meet your exact project specifications—from material selection to installation best practices.
Threaded both ends with thread protectors
10 ft (3.05m) with one coupling attached, and a thread protector on the opposite end
NPT (National Pipe Taper) per ANSI/ASME B1.20.1
½", ¾", 1", 1¼", 1½", 2", 2½", 3", 4", 5", 6"
Bundled, capped, and protected for transit to preserve surface finish
For non-standard lengths, custom finishes, or special packaging, contact our customer service team
Contact us today to discuss your requirements, request samples, or receive a competitive quote for bulk rigid stainless steel conduit.
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