Galvanized Steel Pipe (threaded)

Material: High-quality low-carbon steel, galvanized for added protection
Size Range: 1/2" to 4" (custom sizes available upon request)
Thread Type: NPT / BSPT (other custom threads available)
Temperature Range: -20°C to +100°C
Maximum Working Pressure: Varies by size (please inquire for details)
Surface Finish: Hot-dip galvanized for long-lasting corrosion resistance

Standards Compliance: Meets ASTM, ISO, and EN standards for quality and performance

Hot-dip galvanizing is widely used due to its thick zinc layer, low processing cost, and high production efficiency.

Hot-dip galvanizing production process

Cleaning: Thoroughly clean the steel to remove any dirt, grease, or rust. This is typically done through a series of chemical cleanings, including alkaline cleaners, acid pickling, and flux.
Pickling: Immerse the steel in an acidic solution (usually hydrochloric acid or sulfuric acid) to remove any residual scale and rust.
Fluorescence: The steel is then immersed in a flux solution (usually zinc ammonium chloride) to prevent oxidation before entering the galvanizing bath.
Zincizing: The cleaned and melted steel is immersed in a molten zinc bath at approximately 450°C (842°F). Zinc metallurgically bonds with the steel, forming a series of zinc-iron alloy layers.

Cooling: After being removed from the zinc bath, the steel is cooled in water or air to allow the zinc coating to solidify.

Parameter	Specification/Range
Thickness	0.12mm - 6mm
Width	- For thickness below 0.5mm: 1000mm, 1200mm - For thickness above 0.5mm: 1000mm, 1250mm
Coil Weight	8-10 tons (Customizable based on requirements)
Tolerance	±0.02mm
Substrate Type	Hot rolled coil, Cold rolled coil
Surface Type	Zero spangles (Smooth), Small spangles, Regular spangles, Big spangles
Zinc Coating Thickness	30g/m² - 275g/m² (Z275/G90 standard)
Applicable Standards	AISI, ASTM, BS, GB, JIS
Quality Standards	GB/T2518, GB/T25052, EN10346, JIS G3302, ASTM A653
Certifications	SGS, ISO 9001, CE

Electro-galvanizing uses an electrical current to apply a thin layer of zinc to the surface of the steel pipe. This method is typically used for pipes that are exposed to less severe conditions. Electro-galvanized pipes have a smooth, uniform finish but do not provide the same level of protection against corrosion as hot-dip galvanized pipes.

Benefits of Electro-Galvanizing:
Smoother Finish: Electro-galvanized pipes have a sleek and uniform coating.
Cost-Effective: Because the coating is thinner, electro-galvanizing is typically more affordable than hot-dip galvanizing.
Ideal for Less Harsh Conditions: Best suited for indoor or low-moisture environments.

Threaded pipes can provide an effective seal for pipes transporting liquids, gases, steam, and hydraulic fluid. We thread any length of pipe in diameters ranging from 1/8” to 20”. Tapers available are NPT*, NPS*, 3/16” Peerless, and 8 round taper. (See fabrication services page for larger diameters).