Hastelloy C276 Lined Stainless Steel Pipes

Universal Corrosion Resistance: 

Resists both reducing and oxidizing acids, wet chlorine, chlorides, hypochlorite, and mixed acids – the most versatile corrosion-resistant alloy for lined pipe applications.

Highest Pitting Resistance (PRE ≥ 65): 

Outstanding pitting and crevice corrosion resistance, the highest among all commercial lined pipe materials, with PREN = %Cr + 3.3 × (%Mo + 0.5 × %W) + 16 × %N ≥ 65.

No Sensitization: 

Extremely low carbon content (≤0.010%) plus Mo/W content prevents carbide precipitation – can be used as-welded without post-weld heat treatment.

Excellent Resistance to Wet Chlorine and Hypochlorite: 

Premier material for handling wet chlorine gas, chlorine dioxide, and hypochlorite solutions.

Superior Hydrochloric Acid Resistance: 

Excellent performance in hydrochloric acid (HCl) across all concentrations and temperatures up to 400°C (752°F).

NACE MR0175 / ISO 15156 Compliant: 

Fully qualified for sour service with the highest allowable H₂S partial pressures and lowest pH values.

Excellent Resistance to Mixed Acids: 

Outstanding performance in mixed acid environments (HNO₃/HCl, H₂SO₄/HCl) where other alloys experience rapid attack.

Cost-Effective Alternative to Solid Hastelloy C276: 

Reduces material cost by 80-90% compared to solid Hastelloy C276 pipe while providing equivalent internal corrosion protection.

Temperature Range: 

Lining suitable from cryogenic (-196°C) to 400°C (752°F) in corrosive service, up to 540°C (1000°F) in non-corrosive service.

Weldable End Preparation: 

Available with weld overlay transition (butter layer) using ERNiCrMo-4 (C276) filler metal.

Full Range of Sizes: 

Available from 2″ to 48″ (DN50 to DN1200) with lining thickness from 2mm to 8mm.

International Certifications: 

Lined pipes can be certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, and NK, and comply with NORSOK M-650, NACE MR0175, and ASME standards.

Hastelloy C276 (UNS N10276) is a nickel-chromium-molybdenum-tungsten alloy with the highest molybdenum content (15-17%) among commercial lined pipe materials. The combination of high molybdenum and tungsten (3-4.5%) gives C276 the highest PREN of any commercial alloy (≥65). The extremely low carbon content (≤0.010%) ensures no sensitization and eliminates the need for post-weld heat treatment, even in severe service conditions.

Comparison of PRE (Pitting Resistance Equivalent) Values for Lining Materials:

Base Pipe Selection: Carbon steel, low-temperature steel, or alloy steel base pipe selected based on service pressure, temperature, and mechanical requirements.

Base Pipe Preparation: Base pipe is cleaned (shot blasting to SA 2.5), inspected for surface defects, and prepared for lining application.

Lining Tube Fabrication: Hastelloy C276 nickel alloy sheet is rolled and welded into a tube slightly smaller than the base pipe ID using ERNiCrMo-4 (C276) filler metal.

Lining Insertion: The Hastelloy C276 lining tube is inserted into the base pipe.

Hydraulic Expansion: High-pressure water (up to 5000 psi) expands the lining tube against the base pipe inner wall, creating a tight mechanical bond.

Solution Annealing: Lining material is in solution annealed condition (1120–1175°C) followed by immediate water quenching for optimal corrosion resistance.

Intergranular Corrosion Test: ASTM G28 Method A – mandatory for Hastelloy C276.

Pitting Corrosion Test: ASTM G48 Method A – upon request.

Weld Overlay (Butter Layer): Pipe ends are prepared with Hastelloy C276 weld overlay using ERNiCrMo-4 filler metal.

Hydrostatic Testing: Each lined pipe is hydrostatically tested to verify bond integrity and pressure rating.

NDT Inspection: Ultrasonic testing (UT) and eddy current testing (ECT) verify lining thickness and bond quality – 100% coverage.

End Finishing: Pipe ends are beveled per ASME B16.25 and prepared for field welding.

Marking & Coating: Pipes are marked with grade, size, lining thickness, heat number, and standard. External coating applied upon request.

Base Pipe Inspection: Chemical analysis, mechanical testing, dimensional check, hardness test.

Lining Material Verification: PMI 100% for Hastelloy C276 lining material – verification of Ni (≥57%), Cr (14.5-16.5%), Mo (15-17%), W (3-4.5%) – tungsten verification critical.

Intergranular Corrosion Test: ASTM G28 Method A – mandatory for C276.

Pitting Corrosion Test: ASTM G48 Method A – upon request.

Bond Integrity Testing: Ultrasonic test (UT) to verify bond between lining and base pipe – 100% coverage.

Lining Thickness Check: Ultrasonic thickness measurement at multiple points.

Hydrostatic Test: Each pipe tested at 1.5× design pressure.

Surface Inspection: Internal and external surface inspection.

Dimensional Check: OD, ID, wall thickness, length, straightness.

Sour Service Qualification (upon request): HIC per NACE TM0284, SSC per NACE TM0177.

Third-Party Inspection: SGS, BV, DNV, TUV, LR, ABS available.

Hydrochloric Acid Service (HCl): 

HCl transfer lines, acid regeneration piping, pickling acid circulation lines, concentrated HCl storage tank connections, acid dilution systems.

Wet Chlorine & Hypochlorite Service: 

Chlorine gas drying tower piping, chlorine dioxide transfer lines, hypochlorite injection lines, bleaching chemical lines, pulp & paper bleach plant piping.

Pharmaceutical (High-Purity Aggressive): 

High-purity API reactor feed lines, sterile aggressive chemical transfer lines, clean steam distribution for corrosive services, high-purity HCl handling piping.

Flue Gas Desulfurization (FGD): 

Absorber recirculation lines, slurry transfer lines, quench water lines, reheat duct piping – for high-chloride, low-pH, high-temperature zones.

Oil & Gas (Severe Sour Service): 

Sour gas gathering lines, HP/HT sour gas pipelines, produced water transfer lines, amine regenerator piping (NACE MR0175 compliant, highest H₂S limits).

Waste Incineration: 

Flue gas heat exchanger piping, acid gas condenser lines, scrubber recirculation piping – for high-chlorine, high-acid flue gases.

Chemical Processing (Extreme): 

Mixed acid (HNO₃/HCl, H₂SO₄/HCl) process lines, chlor-alkali heat exchanger piping, vinyl chloride monomer (VCM) processing lines, titanium dioxide production piping.

Pickling Plants (Steel Mills): 

Pickling acid supply lines, acid recovery system piping, spent acid transfer lines, pickling bath circulation lines.

Semiconductor Manufacturing: 

High-purity gas lines, aggressive chemical delivery piping for semiconductor wet processing equipment.

1. What makes Hastelloy C276 different from Alloy 625 for lined pipe applications?
Hastelloy C276 has significantly higher molybdenum (15-17% vs 8-10%) and contains tungsten (3-4.5%), giving it PRE ≥65 vs ≥45 for Alloy 625. C276 offers superior resistance to hydrochloric acid (all concentrations), wet chlorine, and mixed acids where Alloy 625 may be marginal. For HCl and wet chlorine service, C276 is the preferred lined pipe material.

2. Is Hastelloy C276 resistant to hydrochloric acid (HCl)?
Yes. Hastelloy C276 has excellent resistance to hydrochloric acid across the entire concentration range at temperatures up to 400°C (752°F). It is considered the premier material for HCl handling systems, including lined pipe for HCl transfer lines.

3. Can Hastelloy C276 lined pipes be used in wet chlorine service?
Yes. Hastelloy C276 is the premier material for wet chlorine service. Unlike most alloys that fail rapidly in wet chlorine due to pitting or SCC, C276 has outstanding resistance and is the industry standard for chlorine drying and handling systems.

4. Can Hastelloy C276 lined pipes be welded in the field?
Yes, with proper weld overlay (buttering) at pipe ends using ERNiCrMo-4 filler metal. Due to extremely low carbon content (≤0.010%), C276 can be used in the as-welded condition without any risk of sensitization. Qualified welding procedures (WPS/PQR) are available.

5. What is the maximum service temperature for Hastelloy C276 lined pipes?
400°C (752°F) for corrosive service. For concentrated HCl at elevated temperatures, consult corrosion charts. Above 540°C (1000°F) in non-corrosive service, C276 remains stable but mechanical properties degrade. Base pipe selection must consider the overall service temperature.

6. What base pipe material is recommended for high-temperature HCl service?
ASTM A335 Grade P22 (2.25Cr-1Mo) is recommended for high-temperature HCl service where base pipe temperatures exceed 400°C. For moderate temperatures (below 400°C), A106 Gr B is sufficient.

7. Are Hastelloy C276 lined pipes suitable for sour service (H₂S environments)?
Yes. Hastelloy C276 is fully qualified for sour service with the highest allowable H₂S partial pressure limits for nickel alloys. HIC and SSC test reports available upon request.

Highest Corrosion Resistance: PRE ≥65 – unmatched among all lined pipe materials for HCl and wet chlorine service

NACE MR0175 / ISO 15156 Compliant: Highest H₂S partial pressure tolerance, with HIC/SSC test reports

ASTM G28 and ASTM G48 Corrosion Testing: In-house corrosion testing capability with documented reports

Extremely Low Carbon Verified: ≤0.010% carbon content documented on MTR for each lining heat

Cost-Effective: 75-95% cost savings compared to solid Hastelloy C276 pipe

Full Traceability: Heat number on each pipe – traceable to original mill certificate

Complete Size Range: 2″ to 48″ (DN50 to DN1200) – standard and custom sizes

Multiple Base Pipe Grades: API 5L X42-X65, A106 Gr B, A333 Gr 6, A335 P11/P22

Lining Thickness Options: 2mm to 8mm – tailored to your acid concentration and temperature

Weld Overlay Ready: Pipe ends prepared with ERNiCrMo-4 butter layer for field welding

NORSOK M-650 Qualified: Complete offshore documentation packages

Third-Party Inspection: SGS, BV, DNV, TUV, LR, ABS available

Global Delivery: Exported to major chemical plants, HCl handling facilities, FGD systems, and pharmaceutical projects worldwide

Website: www.womicstainless.com

E-mail: info@womicstainless.com

Tel / WhatsApp / WeChat:

Victor: +86 15575100681

Jack: +86 18390957568

Womic Steel – Your reliable partner for high quality stainless steel products, precision machined components, and custom solutions for corrosion resistant applications.

Stock Examples (Hastelloy C276 Lined Pipes – A106 Gr B Base – 3mm Lining – Weld Overlay Ends – HCl Service):

Stock Examples (Hastelloy C276 Lined Pipes – API 5L X52 Base – 4mm Lining – NACE MR0175 – Sour Gas Service):

Stock Examples (Hastelloy C276 Lined Pipes – A106 Gr B Base – 3mm Lining – Wet Chlorine Service):

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