Galvanized Electrical conduit

Specification

Product Name	Galvanized Electrical Conduit / Pipe
Main Material	Carbon Steel (Q235, Q355, per ASTM A53)
Standard Type	UL / cUL Certified (File No. available upon request)
Size Range	1/2″ – 6″ (21.34mm – 168.28mm)
Wall Thickness	2.0mm – 4.0mm (Customizable per RMC / IMC / EMT)
Thread Type	NPT (standard) / BSPT / BSPP (available)
Working Temperature	-30°C ~ +90°C
Certification	UL / cUL, ISO 9001, CE,GB,JIS,DIN
OEM / ODM	Available
Packaging	Bulk Packing / Pallet / Customizable

Its characteristics

• Corrosion Resistance – A common advantage of galvanized steel pipes, which protect carbon steel from atmospheric corrosion and extend their service life.
• High Strength/Impact Resistance – The carbon steel base resists external impacts and withstands loads such as compression, animal bites, soil pressure, and vehicle crushing.
• Electromagnetic Shielding – Shields against electromagnetic interference (EMI) and radio-frequency interference (RFI), protecting internal wiring from external electromagnetic fields, making it suitable for low-voltage, communication, and control systems.
• Easy Installation – Lightweight design supports various internationally recognized connection methods, such as threaded, crimped, and set connections, compatible with mainstream accessories.
• Fire Retardant – The metal material itself is non-combustible, providing temporary protection for cables in the early stages of a fire and slowing the spread of fire along the wiring.
• Temperature and Freeze Resistance – Can withstand prolonged transport of hot water above 100°C in freezing environments or high-temperature industrial settings without cracking due to low temperatures.

Its application areas

1. Commercial Buildings: Lighting and wiring for office buildings, shopping malls, and hotels, used in ceilings or within walls.
2. Industrial: Factory workshops, distribution cabinets, and machine power supply; suitable for scenarios with low vibration and fixed routes.
3. Public Facilities: Electrical systems in airports, subway stations, hospitals, tunnels, schools, etc.
4. Energy Centers: Separate high-voltage and low-voltage wiring for photovoltaic power stations, substations, and communication base stations; protection for main cables in computer rooms.
5. Outdoor: Buried or exposed wiring protection for water pumps, high-humidity factories, and corrosive environments in chemical industrial sites.

What are its classifications?

1. Classification by mechanical strength

• RMC – Rigid Metal Conduit: Thickest wall thickness, highest strength, NPT threads at both ends, highest protection level, suitable for outdoor, underground, and heavy-duty industrial applications.
• IMC – Intermediate Metal Conduit: Medium wall thickness, NPT threads, strength close to RMC, lighter weight, and lower cost.
• EMT – Electrical Metallic Tubing: Thin-walled, unthreaded, uses compression or set-screw connections, lowest cost, suitable for indoor, residential, and ceiling applications.
• FMC/LFMC- Flexible conduit, spiral structure, bendable; LFMC with PVC waterproof sheath for equipment connections. (Note: Not part of the rigid galvanized electrical conduit series)

Parameters	RMC	IMC	EMT
Wall thickness	2.6–3.9mm	1.8–2.5mm	1.0–1.2mm
Thread type	Required Threaded	Required Threaded	None
Connection method	Threaded	Threaded	Crimping/Setting
Weight	Heaviest	Medium	Lightest
Price	Highest	Medium	Lowest
Typical applications	Outdoor/Underground/Industrial	Commercial/Light Industrial	Indoor/Residential

2. Classification by connection method

• Threaded connection- Suitable for RMC and IMC pipes, providing a secure, waterproof, and dustproof connection suitable for heavy-duty environments.
• Compression connection- A US standard EMT connection, requiring no threading, quick installation, and compliant with NEC specifications.
• Set-Screw – Primarily used for Chinese standard JDG pipes, offering extremely fast installation; not commonly used with US standard EMT.

National Standard Correspondence (JDG / KBG / SC)

• JDG: GB/T 20041.1, Set-Screw type thin-walled steel conduit
• KBG: GB/T 20041.1, Compression type thin-walled steel conduit, Compression (crimping with special clamps)
• SC: GB/T 3091, Welded steel pipe, thick-walled, threaded connection, for buried or heavy-duty environments.

Connection Methods

• Threaded Connection: NPT/BSPT threads are machined at both ends of the pipe, and the connection is made using a fitting and a lock nut.
• Compression Connection: The conduit is inserted into the fitting, and the nut is tightened to compress it against the pipe wall.
• Set Screw Connection: A side-mounted screw is used to tighten against the pipe wall, achieving both fixation and grounding.

Comparison of 6 Major Standard Systems

System	Standard	Classification	Corresponding to US standard	Corresponding GB
American Standard	UL 6/1242/797	RMC / IMC / EMT	—	SC / JDG
IEC/EN	IEC 61386	A (Light) / B (Medium) / C (Heavy)	EMT / IMC / RMC	JDG / SC
JIS	JIS C 8305	Thick steel / Thin steel / Unthreaded	RMC / IMC / EMT	SC / JDG
DIN/VDE	DIN EN 61386	Type1/2/3	EMT / IMC / RMC	JDG / SC
BS	BS 4568	Class3 / Class4	IMC / RMC	SC
GB	GB/T 20041	SC / JDG / KBG	RMC/IMC / EMT	—

Glory Steel Factory Advantages

1. Professional electrical conduit manufacturer, specializing in the R&D and production of galvanized electrical conduits, offering a full range of RMC/IMC/EMT products for wholesale and retail.
2. Highly customizable: Wall thickness, length, thread type, end treatment, and packaging can all be customized to customer requirements.
3. One-stop supporting service: We provide hot-rolled/cold-rolled carbon steel coils/strips as raw materials, along with matching fittings, connectors, and box fittings.
4. Competitive pricing: Factory-direct supplier offering a cost-effective price. Provide multilingual communication support in English, Russian, Spanish, Arabic, and other languages.

Glory Steel, located in Tianjin, China, is ISO 9001, ISO 14001, and CE certified, with an annual output of 100,000 tons. We specialize in producing galvanized electrical conduits, including RMC rigid conduit, IMC intermediate conduit, and EMT electrical metallic tubing. With our high-quality products and services, we export to over 120 countries.