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Large Diameter Steel Pipe for Water Transmission

Municipal water supply, raw water transfer, and industrial cooling water systems — AWWA C200 compliant steel pipe with cement mortar lining and advanced external coatings for 50+ years of reliable service.

Water Transmission Pipeline Solutions

Water is the world's most critical resource, and the infrastructure that transports it must be reliable, durable, and cost-effective. Sino East Steel provides complete steel pipe solutions for every water transmission application — from large-diameter municipal supply mains to industrial cooling water systems and raw water transfer lines. Our steel pipe is manufactured to AWWA, ISO, and EN standards with a full range of internal linings and external coatings.

Municipal Water Supply

Municipal water transmission mains demand large diameters, long service life, and absolute reliability. Our AWWA C200-compliant spiral welded steel pipe with cement mortar lining (AWWA C205) delivers the flow capacity, structural strength, and corrosion resistance needed for city water supply networks serving millions of people. Diameters up to 120 inches accommodate the highest-volume requirements.

Raw Water Transfer

Long-distance raw water transfer projects — from reservoirs to treatment plants or between basins — require economical, large-diameter pipe with proven long-term performance. SSAW steel pipe offers the best cost-to-performance ratio for these applications, with lower installed cost than ductile iron or concrete alternatives for diameters above 24 inches.

Industrial Cooling Water Systems

Power plants, refineries, and industrial facilities require massive volumes of cooling water. Our steel pipe systems handle the full range of cooling water applications: once-through systems, recirculating cooling loops, and make-up water supply lines. Special coatings are available for brackish water and seawater cooling applications.

Key Standards for Water Pipe

StandardScopeApplication
AWWA C200Steel Water Pipe, 6 in. and LargerPotable water transmission and distribution
AWWA C205Cement-Mortar Protective Lining and CoatingInternal corrosion protection for water pipe
AWWA C210Liquid-Epoxy Coating SystemsInternal and external epoxy lining for water pipe
ISO 2531Ductile Iron Pipes (reference)Comparable standard for alternative material
EN 10224Steel Tubes for Conveyance of Aqueous LiquidsEuropean water pipe standard
DIN 30670PE Coating for Steel PipeExternal 3LPE coating specification

Cement Mortar Lining Benefits

Recommended Products for Water Transmission

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SSAW Water Pipe

Spiral welded pipe — the most economical choice for large-diameter water mains. AWWA C200 compliant with full traceability.

OD 8"-120"AWWA C200WT 5-25mmCML Lining
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LSAW Water Pipe

Longitudinal welded pipe for high-pressure water transmission. Single longitudinal seam with excellent roundness.

OD 16"-64"AWWA C200WT 6-60mmHigh Pressure
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3LPE Coated Pipe

Three-layer polyethylene external coating for buried water pipelines. Superior corrosion and mechanical protection.

OD 2"-120"DIN 30670ISO 21809-1CSA Z245.21
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Cement Mortar Lined Pipe

Centrifugally applied cement mortar lining per AWWA C205. The gold standard for potable water pipe interiors.

OD 6"-120"AWWA C2056-13mm ThickNSF 61
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Pipe Fittings & Flanges

Complete range of elbows, tees, reducers, and flanges for water pipeline networks. AWWA C208 dimensions.

AWWA C208ASME B16.9Carbon SteelCML Option
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ERW Water Pipe

Electric resistance welded pipe for smaller-diameter water distribution and service connections. Cost-effective.

OD 1/2"-24"ASTM A53API 5LGalvanized Option
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Frequently Asked Questions

What type of steel pipe is best for water transmission?
Spiral welded (SSAW) steel pipe is the preferred choice for large-diameter water transmission mains due to its cost-effectiveness and wide diameter range (up to 120 inches). For smaller diameters, ERW pipe is commonly used. AWWA C200 governs the manufacture of steel water pipe, and cement mortar lining (AWWA C205) is the standard internal protection for potable water.
What is AWWA C200 standard?
AWWA C200 is the American Water Works Association standard for the manufacture of steel water pipe, 6 inches and larger. It covers material requirements, fabrication, testing, and inspection of straight-seam or spiral-seam welded steel pipe intended for water transmission and distribution systems under pressure.
How is steel water pipe protected against corrosion?
Steel water pipe is protected through multiple layers: internally by cement mortar lining (AWWA C205) which provides a passive alkaline environment that inhibits corrosion; externally by 3LPE coating, coal tar enamel, or tape wrap systems. Cathodic protection systems are also commonly used for buried water pipelines to provide additional protection against external corrosion.
What sizes are available for water transmission pipe?
Sino East Steel supplies water transmission pipe from 6 inches (168 mm) to 120 inches (3048 mm) in diameter, with wall thickness from 4 mm to 25 mm. Standard lengths are 6m and 12m. Large-diameter SSAW pipe (24-120 inches) is the most economical choice for major water transmission mains and raw water transfer lines.
What is cement mortar lining and why is it used?
Cement mortar lining (CML) is a centrifugally applied internal coating of cement mortar, typically 6-13 mm thick per AWWA C205. It protects the steel pipe interior from corrosion, prevents tuberculation, and maintains water quality. CML is self-healing for small cracks and provides a smooth surface with a Hazen-Williams C-factor of 130-140.
How long does steel water pipe last?
Properly designed, manufactured, coated, and installed steel water pipe has a service life of 50-100 years or more. The combination of cement mortar lining, high-quality external coating (3LPE or equivalent), and cathodic protection where required ensures multi-decade performance with minimal maintenance.

Need Steel Pipe for Your Water Project?

Contact our water infrastructure team for AWWA-compliant pipe specifications, cement lining options, and a competitive project quotation.

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