Key Features
Fluid pipes are designed for the safe and efficient transportation of water, oil, gas, steam, and other liquids or gases in industrial and commercial applications. Manufactured to international standards, they offer excellent strength, pressure resistance, corrosion resistance, and durability. Available in seamless and welded types, fluid pipes are widely used in petrochemical plants, power stations, water supply systems, construction, and general industrial pipelines. Various sizes, grades, and surface treatments are available to meet different operating conditions and project requirements.
Certified:
Our fluid pipes are manufactured under a strict quality management system and comply with internationally recognized standards, including ASTM, EN, DIN, and GB specifications.
Application:
Fluid pipes are the lifelines of modern industry, enabling the safe and efficient transport of liquids, gases, and multiphase media across vast distances and demanding environments. Their applications span virtually every sector, from energy and water management to chemical processing and municipal infrastructure.
In the oil and gas industry, fluid pipes form the backbone of upstream, midstream, and downstream operations. They are used for wellhead flowlines, gathering networks, long-distance transmission pipelines, and refinery interconnects. High-pressure natural gas and crude oil lines demand pipes with exceptional strength, toughness, and resistance to sour service – often relying on seamless or high-integrity welded designs that meet API 5L and ISO 3183 standards.
Water and wastewater utilities depend on fluid pipes for potable water distribution, sewage collection, and desalination plant intake/outfall systems. Here, corrosion resistance and long service life are paramount, with options ranging from carbon steel with protective coatings to stainless steel and duplex alloys.
The chemical and petrochemical sectors require fluid pipes that can withstand aggressive acids, solvents, and elevated temperatures. Specialised grades – such as austenitic stainless steels, nickel alloys, and lined or clad pipes – are selected to ensure process safety and minimise maintenance downtime.
Power generation plants, including thermal, nuclear, and renewable facilities, use fluid pipes for cooling water, steam, feedwater, and auxiliary systems. Reliability under cyclic thermal stress is critical.
Choosing the right fluid pipe – whether seamless or welded, carbon or alloy steel, with specific wall thickness and jointing methods – directly impacts operational safety, project cost, and lifecycle performance. At Prosper Steel Industry Co.,Ltd, we provide engineered piping solutions tailored to your application, backed by rigorous quality control and global supply chain capabilities. Trust our expertise to keep your fluids flowing reliably, wherever you operate.
Specification:
| Industrial Fluid &Line Pipe Technical Specifications | ||
| Technical Parameter | Standard / Specification | Engineering Context & Description |
| Governing Standards | • API 5L (Line Pipe for Petroleum(Gee) | Defines the chemical composition, dimensional tolerances, and mechanical requirements for industrial fluid transport. |
| • ASTM A100 / A53 (High-Temp & General Service) | ||
| • ASME:B36.106I (Weeded &Seamless Wrought Steel) | ||
| Size Range (NPS) | 1/2" to 48" nominal pipe size (21.3 mm to 1219 mm* OD) | Covers small-bore plant piping up to large-diameter cross-country transmission pipelines. |
| Wall Thickness / Schedule | SCH 10, SCH 40, SCH 60, SCH 160, SCH X5, SCH X95 | Expressed as Schedules(SCH) rather than linear pounds per foot, higher schedule numbers indicate finer widths for superior internal pressure ratings. |
| Common Material Grades | • API 5L:Grade B, X42, X52, X60, X65, X70 | Higher X-numbers (e.g., X70) represent increased minimum yield strength, allowing thinner walls in long-distance high-pressure gas/oil lines. |
| • ASTM:Grade A, Grade B (Carbon Steel) | ||
| • ASTM:A312:T3P34, TP318 (Stainless Steel for Corrosive Fluids) | ||
| Manufacturing Methods | • Seamless (SMILs) for high pressure/temperature | Seamless is preferred for critical process plant man/folds;weeded (EWLS/LAH) is highly co-deffective for extensive cross-country line networks. |
| • ERW (Electric Residence Welded) for medium diameters | ||
| • LSAW / SSAW (Submerged Arc Welded) for large-diameter lines | ||
| End Configurations | • Beveled Ends (BE) for sub-welding (Standards) | Beveled ends are the industry standard for permanent, leakproof field welding in high-integrity piping systems. |
| • Plain Ends (PE) for aculeval end or mechanical couplings | ||
| • Threaded Ends (TE) for small-bore low-pressure piping | ||
| Essential NDT &Verification | • 100% Hydrostatic Pressure Test | Ensures structural continuity along longitudinal welds and prevents brittle fracture failures in cold climates or high-dress conditions. |
| • Radiographic (RT) / Ultrasonic Testing (UT) of weld seams | ||
| • Chatty V-notch Impact Test (for low-temperature environment) | ||
Standard:
| Fluid Pipe Classifications &Industrial Application Matrix | |||
| Pipe Category | Manufacturing Type | Key Properties | Primary Industrial Application |
| High-Pressure Transmission Line Pipe | LSAW / ERW (API 5L X55/X70) | High tensile strength, optimized for long-distance transport with large volume throughput. | Cross-country crude oil, natural gas, and refined petroleum product transmission networks. |
| Plant Process Piping (Carbon Steel) | Seamless (ASTM A106 Gr. B) | Excellent thermal resistance, uniform strength, zero risk of steam used failure. | High-temperature, high-pressure hydrocarbon and steam piping systems inside refineries and chemical plants. |
| Corrosive / Chemical Fluid Pipe | Seamless / Welded (ASTM A312 TP316L) | High chromium & nickel content, exceptional resistance to pitting and acid corrosion. | Transport of corrosive chemical agents, sour process water, and highly reactive fluids in processing facilities. |
| Utility & Water Utility Supply Pipe | ERW / Galvanized (ASTM A53 Gr. B) | Coal-effective, protected by zinc-coating or standard primers against basic atmospheric corrosion. | Plant utility lines, low-pressure cooling water loops, compressed air systems, and non-critical industrial plumbing. |
| Offshore Subsea Flowlines | Seamless / Heavy ERW (API 5L X52 / L80) | Enhanced collapse resistance against high external hydrostatic seabed pressures, strict dimensional control. | Subsea flowlines transferring raw wellbore fluids from offshore subsea trees to floating production platforms (PPSO). |
Process:
Packing:
