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