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Key Features
Our ERW (Electric Resistance Welded) steel pipes are manufactured from high-quality steel coils through advanced continuous roll forming and high-frequency induction welding. This state-of-the-art production process ensures exceptionally tight dimensional tolerances, uniform wall thickness, and an ultra-smooth internal and external surface. Designed for reliability under pressure, our ERW pipes deliver structural integrity and excellent machinability, making them a cost-effective, versatile, and high-performance solution for both fluid transportation and mechanical applications worldwide.
Certified:
Committed to global excellence, our ERW steel pipes are manufactured and certified in strict compliance with international quality benchmarks. We hold certifications including ISO 9001, API 5L (for oil and gas pipelines), ASTM, and EN 10219.
Application:
ERW steel pipes are highly favored across various heavy industries due to their exceptional structural efficiency, reliability, and cost-effectiveness.
1. Fluid & Gas Transportation
The primary application of ERW piping is the safe conveyance of low-to-medium pressure fluids. They serve as backbone pipelines for municipal water supply systems, industrial sewage networks, and HVAC chilled water lines. In the energy sector, certified API 5L ERW pipes are extensively utilized for downstream distribution pipelines transporting natural gas, crude oil, and refined petroleum products over long distances.
2. Structural & Construction Engineering
Thanks to their uniform geometric properties and excellent load-bearing capacity, ERW pipes are widely integrated into modern architecture. They are used as structural columns, scaffolding, and piling for high-rise buildings, airports, and sports stadiums. Additionally, they form the structural frameworks for bridges, highway signposts, and large-scale industrial warehouses.
3. Agricultural & Industrial Utility
In agriculture, these pipes are crucial for fabricating high-volume irrigation networks, deep-well casings, and greenhouse frames. In general manufacturing, they are utilized as conveyor rollers, automotive components, and heavy machinery frameworks.
4. Fire Protection Systems
Due to their dependable pressure resistance and ease of threading or welding, ERW pipes are the industry standard for commercial and industrial fire sprinkler piping networks, ensuring rapid fluid delivery during emergencies.
Specification:
| Item | Technical Specifications &Ranges |
| Outer Diameter (OD) | 21.3 mm to 660.4 mm (1/2" to 26") |
| Wall Thickness (WT) | 1.5 mm to 22.2 mm (SCH10, SCH40, SCH80, SCH STD, etc.) |
| Length Range | • Single Random Length (SRL):5.8m / 6.0m |
| • Double Random Length (DRL):11.8m / 12.0m | |
| • Fixed / Custom Length:Max up to 18.0 meters | |
| Manufacturing Process | Electric Resistance Welding / High-Frequency Welding (HFW) |
| End Finish &Coating | Plain / Beveled / Threaded &Coupled. Varnished, Black painting, Galvanized, or 3LPE Coated. |
| Testing &QC | 100% Hydrostatic Test, Online Ultrasonic Testing (UT) of Weld Seam, Eddy Current (ET), Flattening Test |
Standard:
| Standard Organization | Standard No. / Grade | Steel Grade / Material (Detached) | Typical Applications |
| API (Petroleum Institute) | API:Specen 7L;OPPL1/PPXL21 | PbS 1:Grade A-E, X52, 36S, 352, X54, 356, X60, 360, X70 | Line pipes used for consumer and efficient transportation of oil, gas, water, and petrochemical fluids. |
| PbS 2:Steel Serviabil;BPE, HEC40, HEK90, HEK95, HEK95, HEK95, HEK95, HEK95, HEK95, HEK95, HEK95, HEK95, HEK95, HEK95 | |||
| API:Specen 3CT | Grasp 1:HD, JIS, FTS, NS1, NBS-1, NBS-Q | Casting and tubing (CCTS) for oil and gas wellcure walls to support and extract fluids. | |
| Grasp 2:JDS, LRB-1, LBP-9C, UBG-12CJ | |||
| ASTM / ASME | ASTM A633 Type II | Grade A:Grade B | Conveying low-pressure gas, water, ac, steam, and fuel transmission, as well as structural and mechanical applications. |
| ASTM A635 | Grade A:Grade B | SPIN sheet pipes intended for conveying gas, vapor, water, or other liquids, especially proper for fire pavement systems. | |
| ASTM A6379 / ASME RAC18 | Grade A:Grade C:Grade D | SPIN boiler tubes, superwater tubes, and salts ends made of carbon steel and carbon-manganese steel. | |
| ASTM A6352 | Grade 1:Grade 2:Grade 3 | Welted steel pipe piles for foundations and bridges, serving as a permanent load-carrying member. | |
| ASTM A6303 | Grade A:Grade B:Grade C:Grade D | Cold-formed welded carbon steel structural taking in round, squares, and rectangular shapes. | |
| EN (European Standard) | WR 101017–5 | P197851, P233751, P263751, P197852, P233752, P263752 | Welted steel tubes for pressure purposes, specified for room temperature service. |
| WR 101019–5 / 8 | SZ355891, SZ375D9, MZ375D9, Z3355D9, Z3355D9, Z3355H9 | Cold-formed welded structural hydrolase sections of non-utility and fire grain streets. |
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