Rigid Steel Conduit
Rigid Steel Conduit (RSC) | Heavy-Duty UL Listed Electrical Raceways
Engineered for maximum mechanical protection and low-impedance grounding in heavy industrial and commercial electrical installations, these rigid steel conduits shield critical power distribution wiring against physical impact, crushing loads, and severe environmental exposure. Supplied in full container bundles for electrical wholesalers, contractors, and infrastructure builders requiring strict compliance with North American electrical standards.
Types
Hot-Dip Galvanized Rigid Steel Conduit (RSC)
Heavy-wall steel raceways providing maximum mechanical strength, impact protection, and complete corrosion defense for harsh outdoor and industrial environments per UL 6.
Intermediate Metal Conduit (IMC)
Thinner-wall structural steel conduit offering reduced weight while maintaining high mechanical strength and interior space for easier wire pulling under UL 1242.
PVC-Coated Rigid Steel Conduits
Galvanized steel conduits coated with a uniform exterior PVC layer and interior urethane coating, engineered for highly corrosive chemical plants and wastewater treatment facilities.
Stainless Steel Rigid Conduits
Solid austenitic stainless steel (AISI 304/316) raceways utilized in sterile pharmaceutical, food processing, and marine corrosive installations.
Construction Features
Base Steel Material
High-grade killed carbon steel strip, continuously electric-resistance welded (ERW) into a uniform tubular profile.
Inner Coating
Smooth zinc-based or proprietary low-friction coating applied to the interior weld seam to eliminate burrs and facilitate high-density cable pulling.
Exterior Protective Layer
Continuous hot-dip galvanized zinc coating metallurgy-bonded to the outer steel surface, passivated to resist white rust storage staining.
Thread & Coupling Configuration
Precision-machined NPT taper threads on both ends, supplied with one hot-dipped galvanized coupling per 10-foot length.
Technical Specifications
|
Parameter |
Standard RSC (UL 6 / ANSI C80.1) |
Intermediate Conduit (IMC) |
Compliance / Standard |
|
Trade Sizes |
1/2 inch to 6 inch |
1/2 inch to 4 inch |
UL 6 / UL 1242 / ANSI C80.1 / C80.6 |
|
Standard Length |
10 feet (3.05 meters) with coupling |
10 feet with coupling |
NEMA RN 2 |
|
Thread Standard |
NPT (National Pipe Thread) 3/4 inch taper per foot |
NPT Tapered Threads |
ANSI B1.20.1 |
|
Coating Weight |
Heavy hot-dip zinc on exterior and interior |
Galvanized exterior with zinc interior |
ASTM A90 / UL standards |
|
Bending Performance |
Withstands cold bending without zinc flaking |
Field bendable with standard benders |
NEC Chapter 3 |
Heavy Industrial & Petrochemical Plants: Protecting power and control cables routed through high-impact manufacturing floors and hazardous explosive locations.
Commercial Building Services: Shielding outdoor electrical service entrances, parking garages, and exposed rooftop distribution runs.
Data Centers & Infrastructure: Providing robust physical security and electromagnetic shielding for high-capacity backbone power cabling.
Underground & Concrete Encased Runs: Direct burial and concrete slab embedding where maximum lateral crush resistance is mandatory.
High-Frequency ERW Welding: Continuous high-frequency induction welding mills ensuring a homogeneous, high-integrity longitudinal weld seam capable of withstanding severe hydrostatic and mechanical stress.
In-Line Hot-Dip Galvanizing: Automated continuous zinc bath immersion lines ensuring complete metallurgical bonding of the zinc layer across both exterior and interior walls.
Precision Threading Machines: Multi-head automatic threading units cutting exact NPT thread pitch, depth, and lead angles to prevent field installation galling.
Length Cutting & Reaming: High-speed flying cut-off saws coupled with automated internal deburring tools to guarantee clean, smooth raceway entry points.
Quality Control
Hydrostatic & NDT Testing
Non-destructive eddy current testing on 100 percent of welded tube seams to detect structural anomalies prior to galvanizing.
Zinc Coating Thickness Verification
Magnetic and microscopic coating thickness testing confirming adherence to minimum weight requirements per square foot under ASTM/UL standards.
Bend Ductility Testing
Mandatory mandrel bend tests verifying that the outer zinc coating remains firmly bonded to the steel substrate without cracking or flaking during deformation.
Thread Gauge Inspection
Periodic Go/No-Go thread ring and plug gauge verification ensuring flawless NPT engagement with standard fittings.
Our Certificates
Customization Options
Custom Lengths
Non-standard cut lengths or specific metric sizing options produced to project engineering specifications.
Specialized Coatings
Extra-thick PVC exterior coating (minimum 40 mil thickness) with urethane interior lining for highly acidic or caustic chemical environments.
Thread Protection
Color-coded heavy-duty plastic thread protectors installed on both ends to prevent transit thread damage.
Bundle Stenciling
Custom stencil printing featuring customer brand names, project reference numbers, or specific PO tracking markers along the conduit body.
Packaging and Delivery
Bundle Packaging
Securely strapped heavy-duty hexagonal steel bundles banded with high-tensile steel strapping for secure lifting and crane offloading.
Lifting Protection
Optional nylon slings or protective wood separators placed between bundles to prevent surface abrasion during ocean transit.
Lead Time
20 to 30 days for standard container loads; 35 to 45 days for custom PVC-coated or project-specific production orders.
Shipping Terms
FOB, CIF, DDP shipping coordination via major ports (Ningbo/Shanghai) with complete mill test certificates (MTC) provided.
FAQ