Products Description
| Item | Detailed English Description |
| Product Name | Small diameter ERW steel pipe / Small bore ERW welded steel tube |
| Product Definition | Small diameter ERW steel pipe is a high-precision electric resistance welded carbon steel pipe with small outer diameter, manufactured by high-frequency welding technology. It features uniform wall thickness, smooth surface and stable dimensional tolerance, widely used in light engineering, plumbing, mechanical manufacturing and general structural applications. |
| Production Process | High-frequency electric resistance welding (ERW), hot rolling, cold finishing, straightening, cutting, surface cleaning, quality inspection |
| Product Type | Straight seam welded steel pipe, Round small diameter ERW pipe, Black steel ERW pipe, Pre-galvanized small ERW pipe |
Complete Technical Specification
| Technical Parameter | Standard Specification Range |
| Outer Diameter (OD) | 15mm - 114mm (1/2'' - 4''), custom small size available |
| Wall Thickness (WT) | 1.0mm - 6.0mm, thin & medium wall thickness for small bore pipe |
| Standard Length | 5.8m, 6m, 11.8m, 12m; custom fixed cutting length available |
| Dimensional Tolerance | Outer diameter: 1%; Wall thickness: 12.5%; Length: 50mm |
| Material Grade | Q195, Q215, Q235B, ST37, ST44, Gr.A, Gr.B |
| Executive Standards | ASTM A53, API 5L PSL1/PSL2, EN 10219, BS 1387, GB/T 3091 |
| Pipe Schedule | SCH20, SCH40, SCH80 (common industrial small pipe schedules) |
| Surface Treatment | Black finished, hot dipped galvanized, cold galvanized, oiled, anti-rust treatment |
| Testing Method | Hydrostatic pressure test, eddy current test, ultrasonic test, dimensional inspection, visual inspection |
Product Core Advantages
| Advantage Dimension | English Detailed Description |
| Precision Dimension | Strict small diameter tolerance control, uniform wall thickness, no deformation, perfect fit for precision installation and matching accessories |
| Superior Welding Quality | High-frequency ERW seamless welding, smooth welding seam, no crack, no air hole, high structural stability and pressure resistance |
| Smooth Surface | Clean pipe inner and outer wall, no burrs, low friction resistance, not easy to accumulate dust and impurities |
| Durable Performance | Excellent tensile strength and impact resistance, good anti-corrosion and anti-rust performance after surface treatment, long service life |
| Cost-Effective | More economical than seamless steel pipes, fast production cycle, stable supply, suitable for mass procurement |
| Custom Service | Support custom diameter, thickness, length, surface treatment and packaging according to customer drawings and requirements |
Wide Application Scope
| Application Field | Specific Usage Description |
| Construction Engineering | Building structural supports, fence pipes, scaffolding auxiliary pipes, architectural decoration steel pipes |
| Plumbing & Water Supply | Civil water delivery pipelines, domestic plumbing system, low-pressure fluid transmission pipes |
| Mechanical Manufacturing | Mechanical equipment accessories, instrument pipeline, automobile parts, hardware processing pipes |
| Petroleum & Gas | Low-pressure oil and gas transmission small pipelines, industrial fluid delivery systems |
| Agriculture & Municipal | Agricultural irrigation pipelines, municipal engineering small fluid pipes, garden facility steel pipes |
| General Industry | Pipeline conveying for chemical, textile, electric power and other light industrial industries |
Certification & Quality Guarantee
| Item | Details |
| Certifications | ISO9001 Quality Management System, CE Certification, SGS Inspection Report, Third-party testing available |
| Quality Control | 100% on-line hydrostatic testing, strict raw material inspection, full-process production monitoring, random sampling detection |
| Guarantee Service | Defective products free replacement, stable quality traceability, professional after-sales technical support |
Packaging & Shipping & Trade Terms
| Trade Item | English Description |
| Packaging | Standard export packaging: bundled with steel strips, plastic cap protected at both ends, waterproof woven bag packaging, or customized wooden box packaging |
| Shipping Port | Tianjin, Qingdao, Shanghai, Ningbo China |
| Trade Terms | FOB, CFR, CIF, EXW, DDP (all international trade terms acceptable) |
| Delivery Time | Standard stock goods: 3-7 days; Custom products: 10-20 days according to quantity |
| MOQ | Small trial order acceptable, support bulk wholesale |
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Contact
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