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Premium Stainless Steel Pickled & Annealed Seamless Pipes (Nominal Pipe Size)
At GAOLIN TECH, we provide high-quality Pickled and Annealed (P&A) Stainless Steel Seamless Pipes tailored for heavy industrial applications. Our nominal pipes are engineered to withstand aggressive environments, offering superior corrosion resistance and structural reliability for fluid handling, structural support, and pressure-containing equipment.
Why Choose GAOLIN TECH Pickled Pipes?
1. Superior Corrosion Resistance
The pickling process removes the high-temperature scale and chromium-depleted layers formed during heat treatment. By treating the surface with a specialized acid solution, we restore a dense, protective chromium-oxide passive layer, ensuring maximum resistance to pitting and environmental corrosion.
2. Seamless Integrity & High Pressure Rating
Our pipes are manufactured through a cold-drawn or cold-rolled seamless process, eliminating the risk of weld-seam failure. This makes them ideal for high-pressure systems in chemical processing, oil & gas, and marine engineering.
3. Uniform Matte Finish
Unlike decorative polished tubes, our pickled pipes feature a clean, uniform silvery-white matte finish. This surface is preferred in industrial sectors because it allows for easy inspection of the base metal and provides excellent paint or coating adhesion if required.
4. Strict Heat Treatment Control
All pipes undergo Solution Annealing to refine the grain structure and eliminate internal stresses. This ensures the material achieves its optimal mechanical properties and ductility, meeting the most stringent international engineering codes.
Technical Specifications & Capabilities
We offer a comprehensive range of dimensions covering standard Schedule (SCH) wall thicknesses and Nominal Pipe Sizes (NPS).
Feature | Details & Standards |
Material Grades | Austenitic: 304/304L, 316/316L, 321, 310S, 347H Duplex/Super Duplex: S31803, S32205, S32750 Nickel Alloys: Alloy 600, 625, 800, 825, C276 |
Standards | ASTM A312, ASTM A213, ASTM A269, EN 10216-5, DIN 17456/17458 |
Nominal Size (NPS) | 1/8" to 24" (DN6 to DN600) |
Wall Thickness | SCH 5S, 10S, 40S, 80S, 160, XXS (Up to 30mm+) |
Length | Single Random (5-7m), Double Random (10-12m), or Custom Cut |
Surface Condition | Solution Annealed & Pickled (White Acid Surface) |
Quality Assurance & Testing
To ensure the safety of your projects, GAOLIN TECH implements a zero-defect quality policy. Each pipe is tested according to international benchmarks:
●Hydrostatic Testing: Ensuring 100% leak-proof performance under pressure.
●Eddy Current & Ultrasonic Testing: Non-destructive detection of internal and surface flaws.
●PMI (Positive Material Identification): Verification of chemical composition for every batch.
●Intergranular Corrosion Test: Standard testing (e.g., ASTM A262 Practice A/E) to guarantee long-term durability.
●Mechanical Testing: Tensile strength, yield strength, and elongation verification.
Industrial Applications
Our pickled nominal pipes are widely utilized in:
●Oil & Petrochemical: Refineries, offshore platforms, and pipelines.
●Power Generation: Nuclear and thermal power plant piping systems.
●Water Treatment: Desalination plants and wastewater management.
●Marine & Shipbuilding: Seawater cooling systems and exhaust piping.
●Pulp & Paper: Bleaching and processing equipment.
Your Trusted Foreign Trade Partner
GAOLIN TECH understands the complexities of international procurement. We provide:
Professional Packaging: Seaworthy wooden cases or bundled with end caps to prevent damage and contamination.
Complete Documentation: MTRs (Material Test Reports) per EN 10204 3.1, CO, and Third-Party Inspection (SGS/BV) reports.
Global Logistics: Efficient shipping solutions to major ports worldwide.
Upgrade your piping systems with the durability of GAOLIN TECH.
GAOLIN TECH – Industrial Strength. Precision Engineering. Global Reliability.
