Shandong Dayang supplies hot-dip galvanized round steel pipes for water
supply, fire protection and agricultural construction. Our standard range covers DN15 to
DN100, with wall thickness from 1.5 mm to 4.0 mm, in hot-dip galvanized Q235, supplied in
6 m fixed lengths.
Specifications
| Item | Range / Standard |
|---|---|
| Product | Hot-dip galvanized round steel pipe |
| Nominal size | DN15 – DN100 |
| Wall thickness | 1.5 mm – 4.0 mm |
| Length | 6 m fixed (threaded and grooved ends available) |
| Material | Hot-dip galvanized Q235 |
DN Size Reference
Sizes are quoted by nominal diameter (DN). The table below gives the corresponding
outside diameter so you can match your specification.
| Nominal (DN) | Common Name | Outside Diameter |
|---|---|---|
| DN15 | 1/2″ | 21.3 mm |
| DN20 | 3/4″ | 26.9 mm |
| DN25 | 1″ | 33.7 mm |
| DN32 | 1-1/4″ | 42.4 mm |
| DN40 | 1-1/2″ | 48.3 mm |
| DN50 | 2″ | 60.3 mm |
| DN65 | 2-1/2″ | 76.1 mm |
| DN80 | 3″ | 88.9 mm |
| DN100 | 4″ | 114.3 mm |
Note: in the Chinese domestic market these sizes are commonly called “65 pipe” and
“80 pipe” for DN65 and DN80. If your drawing uses those terms, the actual outside
diameters are 76 mm and 89 mm respectively.
Applications
- Water supply and drainage pipelines
- Fire protection piping systems
- Greenhouse and agricultural shed construction
- Scaffolding and structural tube
- Guardrail and fence posts
Packing and Delivery
| Item | Details |
|---|---|
| Bundling | 【待填：每捆支数 / 单捆重量】 |
| Loading | 【待填：20GP / 40HQ 装柜吨位】 |
| End treatment | 【待填：是否可提供车丝／压槽／坡口】 |
| Zinc coating | 【待填：锌层重量标准】 |
| Trade terms | FOB, CIF, CFR |
Quality Assurance
Mill test certificates issued with every batch, including zinc coating weight and
hydrostatic test results where applicable.
FAQ
Q: What is the outside diameter of DN65 galvanized pipe?
A: DN65 corresponds to an outside diameter of 76.1 mm. In the Chinese market this size is
often called a “65 pipe”, which can cause confusion — please confirm you need DN65 / 76 mm
before ordering.
Q: Can you supply threaded pipe?
A: 【待填：确认是否可车丝及加价方式】
Q: What is the difference between this and a black round pipe?
A: Black round pipe has no zinc coating and is used where corrosion protection is not
required, or where the pipe will be painted after fabrication. Galvanized pipe has a
zinc coating for corrosion resistance and carries a higher price.
Q: Do you also supply seamless pipe or spiral welded pipe?
A: 【待填：确认公司是否供无缝管／螺旋焊管——若供，建议单独建产品线页面】