Hot Dip Galvanized Steel Pipe is a steel pipe coated with a thick zinc layer through the hot-dip galvanizing process to provide excellent corrosion resistance and long service life. It is widely used in construction, water supply systems, scaffolding, agriculture, and outdoor structural applications.
Material Type :
Hot Dip Galvanized Carbon SteelOuter Diameter Range :
21.3mm – 610mmWall Thickness Range :
1.2mm – 20mmCustomizable :
YesOrder(MOQ) :
2TSpecifications
Hot dip galvanized steel pipes are produced by immersing steel pipes into molten zinc, forming a durable metallurgical bonding layer between the steel surface and the zinc coating. This process creates a thicker protective layer that offers superior corrosion resistance compared with electro-galvanized pipes.
The galvanized coating provides strong protection against rust, oxidation, and environmental exposure, making these pipes suitable for long-term use in humid, outdoor, or corrosive environments. The coating also improves the durability and maintenance performance of the steel pipe.
Hot dip galvanized steel pipes are commonly used in water supply pipelines, construction scaffolding, greenhouse frames, fencing systems, agricultural equipment, and structural engineering projects, where reliable corrosion protection and long service life are required.
Hot Dip Galvanized Steel Pipe is one of our core strength products. We maintain substantial inventory to ensure rapid delivery and can also customize extra-large diameter seamless pipes according to your specific requirements. Additionally, we provide comprehensive services including spectroscopic analysis, mechanical property testing, pressure testing, and non-destructive testing (NDT).
| Grade | Grade Equivalent | Mechanical Properties | Size Range | Chemical Composition (Typical, %) |
|---|---|---|---|---|
| Q195 | GB Q195
|
Tensile 315–430 MPa
|
OD 15–219 mm
|
C≤0.12, Mn≤0.50
|
| Q235B | GB Q235B
|
Tensile 375–500 MPa
|
OD 15–325 mm
|
C≤0.22, Mn 0.35–0.80
|
| Q355B (16Mn) | GB Q355B
|
Tensile 470–630 MPa
|
OD 15–325 mm
|
C≤0.20, Mn 1.00–1.60
|
| 10# | AISI 1010
|
Tensile ≥335 MPa
|
OD 15–219 mm
|
C 0.07–0.14, Mn 0.35–0.65
|
| 20# | AISI 1020
|
Tensile ≥390 MPa
|
OD 15–219 mm
|
C 0.17–0.24, Mn 0.35–0.65
|
| DX51D+Z | EN 10346
|
Tensile 270–500 MPa
|
OD 15–168 mm
|
C≤0.10, Mn≤0.50
|
| SGCC | JIS G3302
|
Tensile 270–500 MPa
|
OD 15–168 mm
|
C≤0.12, Mn≤0.50
|
| API 5L Gr.B | API 5L Grade B
|
Tensile ≥414 MPa
|
OD 219–325 mm
|
C≤0.28, Mn≤1.20
|
|
Note: If you do not find a Hot Dip Galvanized Steel Pipe that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan. |
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FAQs
Q: What types and standards of galvanized steel do you mainly supply?
A: We mainly supply hot-dip galvanized steel products including galvanized steel sheets, coils, strips, and pipes. Common base steel grades include DX51D+Z, DX52D+Z, DX53D+Z, and DX54D+Z. The zinc coating thickness typically ranges from Z20 to Z275 to meet different corrosion protection requirements. All galvanized steel products comply with international standards such as ASTM, JIS, and EN. We can also provide material test certificates (MTC) and support customized specifications according to customer requirements.
Q: Can you provide special specifications or non-standard customization? For example, extra-wide plates or pipes with specific wall thicknesses?
A: Of course. One of our advantages is our flexible customization capabilities. We can provide customized size cutting, special thicknesses, and special surface treatments (such as 2B, BA, No.4 brushed finish, mirror finish) based on your drawings or requirements. Whether it's a small trial order or a large-volume purchase, we can meet your needs.
Q: How do you guarantee the quality and consistency of materials? Do you have quality certifications?
A: Quality is our lifeline. We use direct supply from large steel mills to ensure material traceability. Each shipment comes with a Material Quality Certificate (MTC). We have our own quality control team that conducts random checks on material composition, dimensional tolerances, surface finish, and mechanical properties. Our factory is also ISO 9001:2015 quality management system certified.
Q: What are your delivery times and logistics solutions for overseas customers?
A: For standard-specification in-stock products, we can complete preparation and shipment within 7-14 days. Delivery times for customized products will be determined through negotiation based on the specific process. We have established international logistics partners who can arrange full container load (FCL), less-than-container load (LCL), or air freight according to your needs, and provide various trade terms such as EXW, FOB, CIF, and DDP, with door-to-door service.
Q: As a new customer, how do I begin cooperation? Can you provide samples for testing?
A: The cooperation process is very smooth: 1) You provide specific requirements (brand, specifications, quantity, standards); 2) We provide a quotation and technical advice; 3) After confirmation, we arrange the contract and payment; 4) Production/pickup and quality inspection; 5) Shipment and provision of documentation. We encourage sample testing. For serious customers, we can provide small-size samples to ensure that the materials fully meet your processing and application requirements.
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Note: If you do not find a Hot Dip Galvanized Steel Pipe that meets your requirements or is suitable for your customer’s project, please contact our manager sales consultant (Email: stsalesman4@stmetal001.com) and send us your specifications and technical parameter files to obtain Customized quotation plan. |
Electro Galvanized Steel Pipe is a steel pipe coated with a thin zinc layer through an electroplating process to enhance corrosion resistance and surface finish. It is widely used in light industrial structures, furniture manufacturing, electrical conduits, and indoor construction applications.
Details
Hot Dip Galvanized Steel Pipe is a steel pipe coated with a thick zinc layer through the hot-dip galvanizing process to provide excellent corrosion resistance and long service life. It is widely used in construction, water supply systems, scaffolding, agriculture, and outdoor structural applications.
Details
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