Product Overview
| Item | Details |
| Product Name | ERW Welded Pipe for Water Transport (Q345B, 2mm-12mm Wall Thickness) |
| Material | Q345B Carbon Steel (equivalent to 16Mn steel, excellent mechanical strength and corrosion resistance) |
| Welding Technology | High-frequency electric resistance welding (ERW), straight longitudinal seam without extra metal filler |
| Key Advantage | Delivers 98% pressure bearing capacity of seamless pipe at only 65% of seamless pipe cost |
| Main Application | Low-pressure fluid (water, sewage, oil, gas) transportation, construction, structural engineering, mechanical components |
Available Sizes & Wall Thickness
| Nominal Pipe Size (NPS) | DN | Outer Diameter (mm) | Available Wall Thickness (mm) |
| 1/2" | 15 | 21.3 | 2.0 - 3.73 |
| 3/4" | 20 | 26.7 | 2.0 - 3.91 |
| 1" | 25 | 33.4 | 2.0 - 4.55 |
| 1 1/4" | 32 | 42.2 | 2.0 - 4.85 |
| 1 1/2" | 40 | 48.3 | 2.0 - 5.08 |
| 2" | 50 | 60.3 | 2.0 - 5.54 |
| 2 1/2" | 65 | 73 | 2.0 - 7.01 |
| 3" | 80 | 88.9 | 2.5 - 7.01 |
| 4" | 100 | 114.3 | 3.0 - 8.56 |
| 6" | 150 | 168.3 | 4.0 - 10.0 |
| 8" | 200 | 219.1 | 6.0 - 12.0 |
| 10" | 250 | 273 | 6.0 - 12.0 |
| 12" | 300 | 323.9 | 6.0 - 12.0 |
| 16" | 400 | 406.4 | 6.0 - 12.0 |
Standard Length Options
| Length Type | Available Dimensions |
| Random Length | 4m - 10m |
| Fixed Length (SRL/DRL) | 4m, 5.8m, 6m, 6.4m, 7m, 8m, 12m, custom length available |
Chemical Composition of Q345B (Weight %)
| Element | Content Range |
| Carbon (C) | ≤ 0.20% |
| Silicon (Si) | ≤ 0.50% |
| Manganese (Mn) | 1.00% - 1.60% |
| Phosphorus (P) | ≤ 0.040% |
| Sulfur (S) | ≤ 0.040% |
| Vanadium (V) | ≤ 0.15% |
| Niobium (Nb) | ≤ 0.09% |
| Titanium (Ti) | ≤ 0.12% |
Mechanical Properties
| Property | Value |
| Yield Strength (σs) | ≥ 345 MPa |
| Tensile Strength (σb) | 470 - 630 MPa |
| Elongation (δ) | ≥ 21% |
| Impact Toughness (V-notch, 20℃) | ≥ 34 J |
Applicable Standards
| Standard System | Standard Number |
| Chinese National Standard | GB/T 3091-2008, GB/T 3091-2001, SY/T 5037 |
| American Standard | ASTM A53, ASTM F1083, API 5L Gr.B |
| British Standard | BS 1387, BS EN 10025 |
| Other Standards | Can be customized to meet other international standards upon request |
Product Options
| Category | Available Options |
| Surface Treatment | Bare black steel, anti-rust oil, hot dip galvanized, 3PE coating, varnish coating, painting, as customer requirement |
| Pipe End Treatment | Plain end, beveled end, threaded end with coupling, socket with holes, with PVC cap/clamp, as customer requirement |
| Packaging | Bundled in 2000kg max bundles, waterproof paper wrapping, plastic caps on both ends, bulk packaging for large quantity, custom packaging available |
| Certification | ISO 9001, SGS, CE, third-party inspection report available upon request |
Main Applications
| Application Field | Specific Usage Scenarios |
| Fluid Transportation | Potable water supply, sewage discharge, oil and natural gas transmission, pump well piping |
| Construction Engineering | Building structure, curtain wall, support, scaffold, fence post |
| Agricultural Infrastructure | Greenhouse frame, agricultural irrigation piping |
| Industrial Manufacturing | Mechanical components, equipment shaft, wire casing, transformer pipe |
| Infrastructure Project | Urban pipeline network, water conservancy project |
Minimum Order & Supply Capacity
| Item | Details |
| Minimum Order Quantity | 5 Tons |
| Monthly Supply Capacity | 10,000+ Tons |
| Port of Shipment | Tianjin Port, China (other Chinese ports available upon request) |
| Delivery Time | 7 - 15 working days after deposit receipt (depends on order quantity) |
| Payment Terms | T/T, L/C at sight, other negotiable |
Why Choose Our Q345B ERW Welded Pipe?
★Strict quality control: 100% hydraulic pressure test, bending and flattening inspection to avoid leakage and defect.
★Cost-effective: Competitive price with reliable performance that meets engineering requirements.
★Customization service: Support custom size, length, surface treatment and standard to match your project needs.
★Stable supply: Large raw material inventory ensures on-time delivery for large orders.
★Export experience: Professional export packaging and documentation for smooth global logistics.
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