Specification
| Details | Content |
| Product Name | Heavy Wall ERW Steel Pipe High Pressure Steam Pipeline |
| Outer Diameter Range | 21.3mm - 660mm (1/2" to 26") |
| Wall Thickness Range | 6.0mm - 22.2mm, maximum up to 30.96mm for custom heavy wall requirements |
| Standard Length | 6m (20ft), 5.8m, 11.8m, 12m, SRL / DRL customized lengths available |
| Nominal Pipe Size (NPS) | 2" / 3" / 4" / 6" / 8" and above, covering all common industrial pipeline sizes |
| Schedule Options | SCH40, SCH80, SCH120, SCH160, custom heavy wall schedules for extra high pressure scenarios |
Material & Grade Options
| Details | Content |
| Carbon Steel Grades | Q235, Q345, S235JR, S355JR, 20# Steel, Grade A, Grade B |
| Pipeline Special Grades | API 5L X42, X52, X60, X65, L250, L350 |
| Alloy Steel Options | Low alloy grades for specified elevated temperature properties, meeting ISO 9330-2 standard |
| Material Traceability | 100% mill test certificate provided, full raw material inspection before production |
Dimension & Weight Data (SCH40 / SCH80 Standard)
| NPS | OD (mm) | SCH40 Wall Thickness (mm) | SCH40 Weight (kg/m) | SCH80 Wall Thickness (mm) | SCH80 Weight (kg/m) |
| 2" | 60.3 | 3.91 | 5.44 | 5.54 | 7.48 |
| 3" | 88.9 | 5.49 | 11.29 | 7.62 | 15.27 |
| 4" | 114.3 | 6.02 | 16.07 | 8.56 | 22.32 |
| 6" | 168.3 | 7.11 | 28.26 | 10.97 | 42.56 |
| 8" | 219.1 | 8.18 | 41.78 | 12.7 | 63.64 |
Manufacturing Process & Core Technology
| Details | Content |
| Welding Technology | High frequency electric resistance welding (ERW), no filler material added during welding, weld seam chemical composition 100% consistent with base metal |
| Heating Principle | Adopts 50KHz-400KHz high frequency current skin effect and proximity effect, rapidly heats strip edges to melting point, then extruded by pressure rollers to form solid weld |
| Post Weld Treatment | Full weld seam normalizing / annealing heat treatment, eliminates welding stress, improves toughness and pressure resistance performance |
| Production Efficiency | Welding speed reaches 20-200 meters per minute, 25% lower production cost than seamless pipe of same specification, higher material utilization |
International Standards & Certifications
| Details | Content |
| Main Execution Standards | API 5L, ASTM A53, ASTM A106, GB/T 9711, ISO 9330-2, DIN EN 10219, DIN EN 10217 |
| Certifications | CE marked, ISO 9001 quality system certified, support third party inspection by SGS, BV and other authoritative organizations |
| Pressure Rating | Working pressure up to 16MPa, suitable for high pressure steam transmission scenarios up to 450℃ elevated temperature |
| Dimensional Tolerance | Wall thickness tolerance ±0.2mm, outside diameter tolerance ±0.5%, strict size control for high pressure pipeline installation |
End Processing & Surface Treatment
| Details | Content |
| Pipe End Options | Plain end, beveled end (30°-35° for welding), threaded with coupling, chamfer, grooved, screw end |
| End Protection | Plastic pipe cap, iron protector to avoid end damage during transportation |
| Surface Treatment | Bare black finish, anti-rust oil coated, black varnish painted, galvanized, 3PE / FBE anti-corrosion coating for underground steam pipeline |
| Custom Service | Support custom anti-corrosion requirements according to client's project environment |
Strict Quality Inspection Procedures
| Details | Content |
| Raw Material Inspection | Chemical composition analysis, mechanical property test for every batch of steel strip |
| Online Weld Monitoring | Real time eddy current testing during welding process, automatic alarm for defective weld seam |
| Full Body Hydraulic Test | 100% hydrostatic pressure testing according to standard, no leakage guaranteed |
| Final Inspection | Ultrasonic examination for weld seam, dimensional check, visual appearance inspection before packaging |
Main Application
| Details | Content |
| Power Industry | High pressure steam pipeline for boiler system, power plant steam delivery main pipe |
| Petrochemical Industry | High temperature fluid transmission, refinery process pipeline, chemical plant steam network |
| District Heating System | Urban central heating high pressure steam pipeline, industrial park heat supply network |
| Other Industrial Fields | Low and middle pressure fluid pipeline, steam transmission for pharmaceutical, fertilizer, shipbuilding industry |
Packaging & Delivery Terms
| Details | Content |
| Packaging Method | Bundle with steel strips, woven bag packaging, or custom packaging as client's requirement |
| Loading Port | Tianjin Port, China, convenient for global sea transportation |
| Delivery Time | Within 20-30 days after receiving deposit or L/C, according to order quantity |
| Shipping Option | Container shipment, bulk carrier shipment for large volume order |
Payment & Cooperation Terms
| Details | Content |
| Accepted Payment Terms | T/T, Irrevocable L/C at sight, D/P, O/A for long term cooperative clients |
| Supply Capacity | Monthly output over 15000 tons, support large scale engineering order delivery |
| After Sales Service | 7*24 hours technical support, provide installation guidance, quality problem response within 12 hours |
| Supporting Products | Provide matching pipe fittings including flange, tee, elbow, reducer for complete steam pipeline solution |
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Contact
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Email: kepia@tjshenzhoutong.com
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Address: Chenda Road,Daqiuzhuang Town Jinghai County,Tianjin,China.
Tel
Number: +86-22-58162536
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Phone/Whatsapp:
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