We supply hot-dip galvanized spiral welded pipes (HSAW) in Q235B/Q355B. Thick zinc coating (80–200g/㎡) ensures superior anti-corrosion. High pressure resistance, full sizes (DN200–DN3000), fast delivery. Ideal for water, gas, sewage and piling projects.
Hot-dip galvanized spiral welded pipe (HSAW) is manufactured from Q235B/Q355B/L245 steel strips, spiral formed, double submerged arc welded and hot-dip galvanized. The spiral weld distributes stress evenly, offering
better bending & impact resistance than straight-seam pipes. Dual zinc protection (barrier + cathodic) delivers
30–50 years outdoor service life, 20+ years in coastal areas. Smooth inner wall reduces head loss, ideal for municipal, water, energy and piling projects.
Frequently Asked Questions (FAQ):
Q: What is the difference between galvanized spiral pipe and galvanized straight seam pipe?
Spiral pipe features even stress distribution, superior bending and impact resistance. It is available in much larger diameters and more cost-effective for big sizes. Straight seam pipe is mainly for small diameters with higher dimensional precision.
Q:Can you process pipe ends as required?
Yes. We offer beveling, flanging, punching, threading and other customized machining services.
Q: Which standards do your products comply with?
Our pipes meet GB/T 9711, SY/T 5037, API 5L and ASTM A252. Relevant inspection reports can be provided.
| Item |
Specification |
| Product Name |
Hot Dip Galvanized Spiral Welded Pipe / HSAW Pipe |
| Material |
Q235B, Q355B, L245 (API 5L) |
| Standard |
GB/T 9711, SY/T 5037, API 5L, ASTM A252 |
| Outside Diameter |
DN200–DN3000 (Φ219mm–Φ3600mm) |
| Wall Thickness |
5mm–25mm |
| Standard Length |
6m / 12m (Custom 1–18m) |
| Zinc Coating |
80–200g/㎡ (65–120μm) |
| Working Pressure |
1.6MPa–6.4MPa (Custom up to 20MPa) |
| End Finish |
Plain / Beveled / Flanged / Punched |
| MOQ |
100 ton / 1000 piece |
| Delivery Time |
5–15 days |
