Specializing in the production of various stainless steel pipes, plates, coils, rods, pipe fittings, high nickel alloy steel products, high temperature resistant products
PRODUCTS
Galvanized Round Tube
Category:
Galvanized Steel Pipe
keywords :
Galvanized Steel Pipe
Product Description
Produced by welding or seamless forming followed by hot-dip galvanizing, which applies a uniform zinc coating for excellent corrosion resistance. Features smooth internal and external surfaces, good ductility, and strong coating adhesion. Available base grades: Q195, Q235, Q345, S235JR, S355JR, S275JR, GR. B, STK400, STK500. Shapes: round, square, rectangular. Outer diameter (round): 21.3mm – 609.6mm. Wall thickness: 1.0mm – 16.0mm. Square/rectangular sizes: 20×20 – 400×400mm. Zinc coating weight: Z60 – Z500 (g/m²). Surface finish: bright spangle, minimum spangle, or passivated. Length: 3m – 12m or custom. End finish: plain, beveled, threaded with coupling, or grooved. Manufacturing: ERW welded or seamless, pre-galvanized or post-galvanized. Threading and coupling available. Meets ASTM A53, BS 1387, EN 10255, JIS G3444, or GB/T 3091 standards.
Parameter
|
Product name |
galvanized round steel pipe / galvanized round steel tube |
|
Standard |
AISI,ASTM,DIN,JIS,GB ,JIS,SUS,EN,etc |
|
Grade |
10#, 20#, 45#, 16Mn, A53(A,B), Q235, Q345, Q195, Q215, St37, St42, St37-2, St35.4, St52.4, ST35, API 5L, ASTM A53, ASTM A671-2006, ASTM A252-1998, ASTM A450-1996, ASME B36.10M, BS 1387, API 5L, ASTM A53-2007, ASTM A671-2006, ASTM A252-1998, ASTM A450-1996, ASME B36.10M-2004, ASTM A523-1996, BS EN10296 |
|
Wall Thickness |
2mm~20mm |
|
Outer Diameter |
20mm~508mm |
|
Length |
Length: Single random length/Double random length 5m,5.8m,6m,10m,12m,14m or according to the actual requirements of the customer |
|
Pipe Ends |
Plain end/Beveled, protected by plastic caps on both ends, cut quare, grooved, threaded and coupling, etc. |
|
Surface Treatment |
black paint,varnish,oil,galvanized,anti-corrosion coated |
|
Product Application |
1. Fence, greenhouse, door pipe, greenhouse |
Application description:
Widely used in water supply and drainage systems, fire sprinkler lines, gas pipelines, scaffolding, fence posts, greenhouse frames, handrails, and structural supports. Also suitable for electrical conduit, industrial cooling lines, and agricultural irrigation. The zinc coating provides long-lasting corrosion protection for both indoor and outdoor installations.
Production description
The process begins with steel coil (for welded pipes) or billet (for seamless pipes). For welded pipes, the coil is slitted, roll-formed, and welded longitudinally (ERW) into a black pipe. For seamless pipes, a billet is pierced and cold drawn. The black pipe is then cleaned, fluxed, and immersed in a molten zinc bath at approximately 450°C. The zinc coating bonds metallurgically to the steel surface. Air knives or centrifuge controls coating weight (Z60–Z500). After galvanizing, the pipe is cooled, passivated, and inspected for coating uniformity, thickness, and adhesion. Optional threading, coupling, or grooving is then applied. Finished pipes are bundled, capped, and packed for shipment.
Shipping Packaging
For export, galvanized pipes are bundled with plastic end caps, wrapped in VCI paper and moisture-proof polyethylene, packed in steel or wooden crates (or on ISPM-15 pallets), secured with steel straps, and fitted with edge protectors. Labels include grade, size, length, quantity, and heat number for safe sea freight.
Why Choose Us?
1.Factory Strength:Direct manufacturer with ERW welding, seamless drawing, and in-line hot-dip galvanizing lines, ensuring consistent coating weight (Z60–Z500), uniform finish, and stable supply.
2.Quality Assurance:Strict control of zinc coating adhesion, thickness uniformity, and thread accuracy; 100% hydrostatic or eddy current testing; compliant with ASTM A53, BS 1387, EN 10255, JIS G3444, GB/T 3091.
3.Certifications & Reports:Mill test certificates (MTC) with each shipment; third-party inspections (SGS, BV) and salt spray test reports available upon request.
4.Customization & Service:Wide grade range (Q195–Q345, S235JR–S355JR, GR.B, STK400), shapes (round, square, rectangular), sizes (OD 21.3–609.6mm, wall 1.0–16.0mm), custom lengths, threading, coupling, grooving with fast lead times.
5.Export Packaging:Plastic end caps + VCI paper + moisture-proof wrapping + steel/wooden crates + ISPM-15 pallets + edge protectors for safe sea freight and damage-free delivery.
FAQ
1. How to store galvanized pipes to prevent white rust before use?
Store on dry, elevated racks under cover. Keep original end caps and wrapping intact. Avoid contact with wet ground, acids, or dissimilar metals. Good ventilation helps prevent condensation.
2. Can galvanized pipes be welded without damaging the coating?
Welding burns off zinc near the weld zone. Use low-heat input and apply cold-galvanizing spray or zinc-rich primer to restore corrosion protection on welded areas.
3. Threaded vs grooved ends – which is better for installation?
Threaded ends are traditional for small diameters (≤100mm) and low-pressure systems. Grooved ends allow faster, flexible assembly with mechanical couplings, ideal for larger diameters and fire protection systems.
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FACTORY APPEARANCE
HONORS AND QUALIFICATIONS
The company has sufficient inventory and complete varieties and specifications. Special materials and specifications are produced according to customer requirements and exported to Asia, the Middle East, Europe and other countries and regions. We have our own quality management systems: ISO9001, ISO14000, OHSAS18001 standards.
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We understand that our customers value quality and after-sales service most. We consistently adhere to high standards and strict requirements, striving to become your preferred partner.
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Building 1, Wealth No.1 Plaza, Huaiyin District, Jinan City, Shandong Province, China
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