Product Name: Low‑Alloy Steel Pipe
Introduction
Low‑Alloy Steel Pipe is manufactured from carbon steel with controlled additions of alloying elements-such as chromium, molybdenum, nickel, and vanadium-to enhance strength, toughness, and corrosion resistance relative to plain carbon steel. Available in seamless and welded constructions, these pipes deliver superior performance in moderately demanding pressure, temperature, and corrosive service, making them ideal for oil & gas, power generation, and heavy‑equipment applications.
Key Specifications
| Specification | Details |
|---|---|
| Applicable Standards | ASTM A335 (seamless), ASTM A691 (coated), API 5L PSL1/PSL2 |
| Common Grades | P1, P5, P9, P11, P22 (Cr‑Mo series), 4140, 4340 |
| Manufacture | Seamless (hot‑finishing) or ERW + post‑weld heat‑treatment |
| Outer Diameter (OD) | ½″–24″ (21.3 – 609.6 mm) |
| Wall Thickness | SCH 10–SCH 160 (1.65 – 25.4 mm) |
| Length | 6 – 12 m (custom up to 18 m) |
| Tensile Strength | 485–760 MPa (grade dependent) |
| Yield Strength | 345–550 MPa |
| Elongation (min) | ≥ 15 % |
| Hardness | HB ≤ 237 (quenched & tempered grades) |
| Surface Finish | Black lacquer, painted, galvanized, or anti‑rust oiled |
Custom dimensions, grades, and end finishes available upon request.
Features & Advantages
Enhanced Mechanical Strength: Alloy additions boost yield and tensile strengths for thinner‑wall designs under high pressure.
Improved Toughness: Refined microstructure and post‑weld heat treatment deliver reliable toughness at elevated and sub‑ambient temperatures.
Good Corrosion & Oxidation Resistance: Cr‑Mo grades resist scaling and sulfidation in high‑temperature hydrogen‑sulfide and steam environments.
Excellent Weldability: Controlled carbon equivalent and heat‑treatment practices support high‑integrity welds with minimal pre‑heat.
Versatile Coatings: Available with fusion‑bonded epoxy, 3‑layer PE, or galvanized finishes for enhanced external protection.
Applications
Power Generation: Boiler tubes, superheater/reheater piping, and header lines in fossil‑fuel and nuclear plants.
Oil & Gas: High‑pressure transmission lines, risers, and well casing in upstream and midstream services.
Petrochemical & Refining: Process piping in reactors, heat exchangers, and pipeline manifolds.
Chemical Processing: Lines handling moderate corrosive fluids and high‑temperature streams.
Heavy Machinery: Hydraulic cylinder tubing, piston rods, and structural frames in industrial equipment.
Packaging & Delivery
Bundling: Pipes grouped by size/grade, strapped with corrosion‑resistant bands, and supported on treated skids.
End Protection: Plastic or metal caps prevent ingress; flange kits available.
Surface Protection: Optional internal coating, external paint, or galvanization; VCI film wrapping for export.
Lead Time: Standard production and shipment within 25–35 days after order confirmation; expedited schedules (15–20 days) available.
Why Choose Our Low‑Alloy Pipes?
Precision Heat Treatment: Automated normalizing, quench & temper, and stress‑relief furnaces deliver consistent mechanical properties.
Stringent Quality Control: 100 % ultrasonic and hydrostatic testing, dimensional verification, and mechanical testing per ASTM/API/EN standards.
Comprehensive Fabrication: In‑house cutting, beveling, threading, bending, and flanging-ready for field installation.
Technical Expertise: Metallurgists and application engineers provide material selection, corrosion modeling, and system design support within 12 hours.
Contact Us
For robust, high‑performance Low‑Alloy Steel Pipes tailored to your pressure, temperature, and corrosion requirements, please contact our sales department. We're dedicated to delivering reliable piping solutions and expert support for your most demanding applications.
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