Cangzhou Spiral Steel Pipes Group Co.ltd
The Solid Foundation for Project SuccessDrinking Water Pipeline
Giant-Scale Drinking Water Pipelines: Engineered for the World’s Thirstiest Cities
When a nation’s drinking water depends on a single pipeline, there is no room for corrosion, leakage, or toxic contamination. You need a manufacturer who treats water transmission main as a mission, not just a product. As the largest spiral steel pipe conglomerate in China, we provide integrated drinking water pipeline solutions that push the boundaries of size, length, and safety.
Drinking Water Grade Spiral Welded Pipe | CNAS Lab Tested | AWWA C200 Compliant
OD: 219-3620mm
Wall Thickness: 5-24.5mm
Length: 1-18m or Custom
Standard: AWWA C200, API 5L, EN 10217,GB/T 9711,etc.
Coating: Fusion Bonded Epoxy (FBE) / Cement Mortar Lining
Certification: CE/ISO9001/ISO14001/ISO45001/CNAS/API 5L,etc.
Steel Grade: ASTM A53 Grade B / API 5L Gr B/X42M/X52M/X60M/X65M/X70M/BM/X46M/X56M/X80M, etc.
Engineered For Zero Leakage And 100% Water Purity
Procurement directors often face a nightmare: small-diameter pipes mean higher flow velocity and energy costs; short pipes mean thousands of risky field welds; uncertain coatings mean potential health crises. We solve this at the molecular level.
Beyond Limits: The 3.6 Meter Diameter & 18 Meter Length Advantage
Most mills are constrained by their forming machines. We aren't. Our strategic in-house production lines are the backbone of mega-infrastructure projects globally.
The Giant’s Reach (Up to 3,620mm OD)
We are one of the few mills on earth capable of forming spiral pipes up to 3,620mm in outer diameter(large diameter drinking water pipe). This isn't just about size; it’s about volume. For long-distance water diversion projects, fewer pipes mean lower pumping station costs and faster installation.
18 Meters, End-to-End: Beyond Pipe Forming, We’ve Upgraded the Entire Production Line
While most mills are capped at 12 meters for critical finishing processes, we’ve systematically retrofitted our entire production chain to handle up to 18 meters (and even single-pipe lengths exceeding 30 meters) in one continuous flow. This means:
· Inline X-Ray Weld Inspection — Full 18m seam scanned in one continuous pass. Zero blind spots.
· Hydrostatic Testing — Pressure-tested as a single integrated unit, all 18 meters.
· 3PE External & FBE Internal Coating — Uninterrupted application. No splicing, no weak points.
Our forming line can actually produce single pipes over 30 meters. The 18-meter specification means every quality process — X-ray, hydro-test, dual coating — is applied end to end, without cutting.
You receive a fully tested, fully coated asset. Ready to bury.
Trust Through Transparency: CNAS Laboratory & Global Certifications
You should never have to guess if the water pipes are safe. We prove it before they leave the yard.
In-House CNAS Laboratory (ISO/IEC 17025)
This is our pride. While competitors outsource their testing, we operate an internationally accredited CNAS lab right on campus. We perform rigorous chemical composition analysis, charpy impact tests, tensile tests, and crucially, heavy metal migration tests for the food-grade epoxy lining. We see what the naked eye cannot.
API 5L Monogram
Our pipes comply with API 5L PSL 2 standards, ensuring strength and toughness for high-pressure transmission.
Drinking Water Certifications
Potable water steel pipe produced by Cangzhou Spiral Steel Pipes Group Co.ltd, We strictly adhere to AWWA C200 standards. Our internal liquid epoxy coating is certified to NSF/ANSI 61(NSF certified steel pipe), guaranteeing that the water reaching people’s homes is as pure as it left the source.
Applications: Spanning Continents, Serving Cities
Long-Distance Water Diversion
Mountainous terrain crossing, river crossing
Municipal Water Mains
Urban ring networks requiring high pressure
Hydroelectric Penstocks
Supplying clean energy water flow
Seawater Desalination Intake
Robust anti-corrosion properties
Are You Planning a Large-Scale Water Project?
Do not compromise on diameter. Do not gamble on length.
Tell us your project requirements. Our engineering team will provide a data-driven feasibility analysis, including the logistical optimization of transporting super-length pipes.
FAQS
Is it safe to drink water from steel pipes?
Yes, food-grade epoxy lining steel pipes are safe for drinking water(For example: API 5L PSL 2 spiral welded pipe or special stainless steel pipe for drinking water.) because they resist corrosion, don't leach harmful substances, and meet international potable water standards.
Can I Use Black Steel Pipe For Drinking Water?
Yes, but it is necessary to strictly comply with international standards for the use of drinking water pipelines.
What Color Pipes For Potable Water?
blue
The Right Color and Coating
For example, pipes carrying raw water should be coated in a brown/green color. For potable water pipes, they should be coated using a safety blue.
What color is a non-potable water pipe?
color purple
The color of the pipe identification shall be discernable and consistent throughout the building. The color purple shall be used to identify nonpotable water distribution systems.
Which steel is good for drinking water?
Hygiene and Safety
Stainless steel or specially coated spirally-welded pipe to drinking water standards.
Transporting pipes up to 18 meters long is a logistical challenge. How does your factory ensure safe delivery of these ultra-long drinking water pipes, and what’s the real on-site benefit for my project?
You’re right, logistics are key. We actually have a dedicated in-house logistics engineering team that plans the multimodal transport (vessel, rail, and specialized hydraulic trailers) from our port-proximate yards. But the on-site benefit is where the real value lies: an 18-meter pipe slashes your field girth welds by one-third compared to standard 12m pipes. For a 10km drinking water transmission main, that translates to roughly 1,100 fewer welds. This doesn't just cut labor costs and X-ray inspection time; it directly removes over 1,000 potential leak points—a critical safety margin for a zero-leakage potable water system. We ensure the pipe arrives straight, round, and ready to lay.
Raw water can be aggressive. What specific in-house testing proves your large-diameter (3620mm) pipes will never leach toxins or contaminate drinking water over a 50-year service life?
The short answer is our CNAS-accredited laboratory (ISO/IEC 17025). Long before shipment, we don't just check steel strength; we simulate decades of service. Every batch of our NSF/ANSI 61 certified food-grade epoxy lining undergoes high-temperature immersion and precise heavy metal migration testing (BPA, lead, and VOC analysis) right inside our facility. We test for extractables at specific pH levels and temperatures to certify zero toxicological risk. This means we hand you a mill test report with chemical passivity data, not just a third-party paper certificate. For a 3.6-meter diameter pipe carrying an entire city's water, this in-house, real-time contamination vigilance is your ultimate guarantee against a public health crisis.
Can I Have A Trial Order?
Yes, of course.
Can I make an online inspection reservation?
Yes, send your inquiry to our email or add our manager WhatsApp:
8615822968134
Can I get a sample of the plant's drinking water steel pipe?
Cangzhou Spiral Steel Pipes Group Co.ltd can give you free sample for Drinking Water LinePipe Project
Other factories also claim they can produce 18-meter pipes. What makes your 18-meter drinking water pipeline truly different?
Ask them one question: "Can you X-ray, hydro-test, and coat the full 18 meters inline?"
Most mills can form an 18-meter pipe, but then they hit a wall — their testing and coating stations were designed for 12 meters. They'd have to cut it short to finish the job.
We don't. We invested heavily in retrofitting the entire downstream line specifically for 18-meter capability. Our inline X-ray weld inspection, our hydrostatic tester, and our 3PE external / FBE internal coating systems are all upgraded to process the full 18-meter length in a single pass. In fact, our forming line can produce single pipes over 30 meters — the 18 meters refers to the length at which every quality and coating process is still fully applied, end to end.
So when you receive our pipe, it's not just a long steel cylinder. It's a fully inspected, fully pressure-tested, fully corrosion-protected asset — ready to weld and bury. That's the engineering depth you expect from China's largest spiral pipe group.