Product Name: Stainless Acid-Resistant Pipe
Introduction
Stainless Acid-Resistant Pipes are corrosion-engineered tubes made from corrosion-resistant stainless and nickel-alloy grades selected to withstand acidic, chlorinated, and oxidizing environments. They combine controlled metallurgy, precision manufacture, and surface finish treatments (pickling, passivation, electropolish) to provide long service life in chemical plants, pickling lines, flue-gas desulfurization, acid storage and transfer, and other highly corrosive process systems.
Key Specifications
| Item | Typical Range / Notes |
|---|---|
| Applicable Standards | ASTM A312 / A213 / A269 / A358, EN 10216-5 / EN 10217-7, ASME B36.19 (sizes) |
| Common Alloys / Grades | 304L, 316L, 317L, 321H, 904L, Alloy 20, Duplex 2205, Super-Duplex S32750, Hastelloy C-276 |
| Manufacture | Seamless hot-rolled, ERW, or welded & PWHT (as required) |
| Outer Diameter (OD) | 6 mm – 610 mm (¼" – 24"); custom sizes available |
| Wall Thickness | 0.5 mm – 25 mm (thin tube to heavy pipe) |
| Length | 6 m / 12 m standard; cut-to-length, spools, or coils available |
| Temperature Range | Cryogenic to +600 °C (grade dependent) |
| Pressure Rating | Per code/design (ASME/EN calculations) |
| Surface Finish | 2B, BA, pickled & passivated, electropolished; Ra values available |
| Typical Tests | PMI, UT/RT, hydrostatic, pitting corrosion (ASTM G48), dimensional & surface inspection |
Features & Advantages
Superior Acid Resistance: Selected austenitic, duplex, and nickel alloys provide excellent resistance to acids (sulfuric, phosphoric, acetic), chlorides, and oxidizing agents.
Low Corrosion Rates: Optimized alloying (Mo, N, Cu, Ni, Cr) reduces pitting, crevice corrosion and general attack in aggressive media.
Wide Temperature Capability: Options from standard 300-series to high-nickel and duplex alloys cover cryogenic up to elevated temperature operations.
Clean, Inert Interior: Pickling/passivation and optional electropolish remove contaminants and create a stable passive film for sanitary or critical chemical services.
Fabrication & Weldability: Good formability and weldability with qualified WPS/PQR; duplex grades may require controlled heat input and PWHT guidance.
Lifecycle Economy: Longer service life and lower maintenance in corrosive service reduce total cost of ownership vs carbon steel or inadequately alloyed alternatives.
Applications
Acid transfer and piping systems (H₂SO₄, HCl, HNO₃, acetic acid)
Pickling lines, acid regeneration and storage tanks
Flue-gas desulfurization (FGD) and scrubber ducting
Chemical process piping and reactors handling chlorides and halides
Seawater/brine service (duplex / super-duplex) and desalination pre-treatment
Pharmaceutical, food & beverage where corrosion + hygiene are required
Quality Assurance & Testing
Material Traceability: Full Mill Test Certificates (MTC) with heat numbers and chemical analysis.
Positive Material Identification (PMI): Verifies alloy chemistry for critical orders.
NDT: UT/RT on welds and body, dye-penetrant/magnetic-particle on weld finishes as required.
Corrosion Testing: Pitting and crevice resistance tests (ASTM G48) available on request for high-risk services.
Surface Verification: Roughness, thickness, and passivation testing (e.g., ferroxyl or colorimetric) to confirm cleaning quality.
Documentation: Full test dossiers, NDT reports, WPS/PQR and PWHT records delivered with shipment.
Packaging & Delivery
Protection: ID/OD caps, VCI film or vacuum/inert packing for high-nickel alloys, timber cradles for export.
Labeling: Laser/paint marking with grade, heat number, size and test references.
Spooling/Skidding: Pre-spooled lines or skid-mounted spools for rapid site installation.
Lead Time: Standard stainless stock 2–4 weeks; duplex, super-duplex, Alloy 20 or Hastelloy and special testing: 4–10+ weeks depending on scope.
Selection Guidance / Ordering Info
To recommend the optimal alloy and pipe design, please provide: process fluid composition (including ppm Cl⁻, S, H₂O, H₂S), temperature range, pressure, desired service life, and any regulatory/sanitary requirements. We will advise on metallurgy (e.g., 316L vs. 904L vs. Alloy 20 vs. duplex), required surface treatment, and recommended NDE/inspection plan.
Why Choose Our Pipes?
Metallurgical Expertise: Alloy selection tailored to specific acid chemistries and temperatures to avoid pitting, stress-corrosion cracking and general attack.
Full Traceability & QA: Melt-to-pipe traceability, PMI, and comprehensive NDT ensure confidence in critical systems.
Value Engineering: Options for cladding or lined carbon-steel to balance performance and cost where full-alloy pipe is not required.
Fabrication Support: WPS/PQR development, on-site welding supervision, and guidance for PWHT or post-weld passivation.
Contact Us
Provide your process details and we'll return a tailored material recommendation, wall-thickness calculation, inspection scope and formal quote. Typical technical response available within 12 hours after receiving complete process data.
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