ASTM B862 Ti2 Titanium Alloy Welded Pipe For Chemical Processing
Sep 09, 2025
Products Description
ASTM B862 Ti2 (Grade 2 welded titanium pipe) is widely used in the chemical processing industry (CPI) due to its exceptional corrosion resistance, cost-effectiveness, and workability. It serves as a preferred material for transporting highly corrosive media that would cause rapid failure in stainless steel and most other metals.
Core Advantages of ASTM B862 Ti2
Unmatched Chloride Corrosion Resistance:
Immune to pitting, crevice corrosion, and stress corrosion cracking (SCC) caused by chloride ions-conditions under which materials like 316 stainless steel fail rapidly.
Broad Corrosion Resistance:
Excellent performance in oxidizing, neutral, and weakly reducing environments, including:
Chlorates (e.g., NaClO₃)
Hypochlorites (e.g., bleach, NaClO)
Wet chlorine gas
Oxidizing acids (e.g., nitric acid, chromic acid)
Various organic chlorides
Cost-Effectiveness:
As a welded pipe, it is significantly more economical than seamless titanium pipes (e.g., ASTM B338), offering the best balance of performance and cost for most CPI applications.
Smooth Surface & Anti-Fouling Properties:
The smooth inner surface minimizes scaling, maintains flow efficiency, and reduces maintenance needs.
Specific Application Areas
ASTM B862 Ti2 welded pipes are primarily used in process piping systems for:
1. Chlor-Alkali Industry
Transporting wet chlorine gas (hot or cold)-titanium forms a protective oxide layer, ensuring excellent corrosion resistance.
Handling sodium hypochlorite (NaClO) in bleaching and disinfectant production, storage, and transfer systems.
Conveying chlorate solutions for chlorine dioxide production (key in pulp bleaching).
2. Organic Chemical Production
Transporting corrosive streams containing organic chlorides (e.g., chlorobenzene, vinyl chloride) in pesticide, dye, pigment, and plastic (e.g., PVC) manufacturing.
Used in acetic acid, formic acid, and other organic acid production processes, especially in chloride-contaminated environments.
3. Inorganic Chemical Production
Nitric acid: Widely used in concentration, recovery units, and associated piping systems.
Urea: Employed in specific sections (e.g., high-pressure decomposition systems) of urea production plants.
4. Oil Refining & Petrochemical Plants
Crude distillation overhead systems: Handling corrosive vapors and condensates containing HCl, H₂S, and H₂O.
Hydrotreating units: Transporting corrosive condensates with ammonium salts (e.g., NH₄Cl, NH₄HS), which cause severe corrosion at high temperatures.
5. Wastewater Treatment & Environmental Applications
Piping systems for industrial wastewater containing chlorides, sulfides, and acidic components.
Handling acidic condensates in flue gas desulfurization (FGD) systems after scrubbers.
Design and Operational Considerations
Limitations:
Not suitable for non-oxidizing, strong reducing acids (e.g., non-aerated boiling concentrated hydrochloric or sulfuric acid). For such environments, higher-grade alloys like Gr.7 (TA9, Ti-Pd) or Gr.12 (Ti-Ni-Mo) are required.
Crevice Corrosion Risk:
May occur in high-temperature (>120°C), high-chloride, and oxygen-deficient crevices (e.g., under gaskets or flange faces). Design should avoid creating stagnant zones.
Erosion and Cavitation:
Velocity limits or protective designs are necessary if the media contain solid particles or are prone to cavitation.
Welding Quality:
Welding must be performed using automatic TIG (GTAW) with full high-purity inert gas (argon) protection to ensure weld quality matches the base metal.
ASTM B862 Ti2 welded titanium pipe is a workhorse material in the chemical processing industry for combating chloride-induced and acidic corrosion. It combines the superior corrosion resistance of Grade 2 titanium with the economic advantages of welded pipe technology, providing an ideal solution for building reliable, long-lasting, and cost-effective piping systems. It plays an indispensable role in traditional chlor-alkali plants, modern oil refineries, and environmental engineering projects.
Titanium product forms available from GNEE
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Material
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Pure titanium and Titanium alloy
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Titanium Grade
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Grade 1-Unalloyed titanium
Grade 2-Unalloyed titanium
Grade 3-Unalloyed titanium
Grade 7-Unalloyed titanium plus 0.12 to 0.25 %palladium
Grade 9-Titanium alloy (3 % aluminum, 2.5 % vanadium)
Grade 12-Titanium alloy (0.3 % molybdenum, 0.8 % nickel),
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Standard
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ASTM B338/ASME SB338, ASTM B337/ASME SB337, ASTM B861/ASME SB861, ASTM B862/ASME SB862,AMS4911,AMS4928
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Shape
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Round Square Rectangle
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Type
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Seamless/Welded
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Seamless titanium tube: Titanium sponge-Compacting electrodes-melting-Forge-Bar billets-Extruding-Rolled-Straightening-Seamless tube
Welded titanium tube: Titanium sponge-Compacting electrodes-melting-Forge-Plate billets-Hot rolled-Cold rolled-Titanium scrap-Welded-Welded tube |
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Surface
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Polishing, picking, acid washed, black oxide
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Application
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1) General service industries (petroleum, food, chemical, paper, fertilizer, fabric, aviation and nuclear
2) Fluid, gas and oil transport
3) Pressure and heat transmission
4) Construction and ornament
5) Boiler heat exchangers
6) Motorbycle and bike
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Material Milling Certificate
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According to. EN 10204.3.1
Including Chemical composition and Mechanical property |
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Grade |
Gr1, Gr2, Gr3,Gr4,Gr5, Gr7, Gr6,Gr9, Gr11, Gr12 ,Gr16, Gr17,Gr25 |
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Size |
All sizes can be customized |
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Application |
Metallurgy, electronics, machinery, medical treatment, chemical industry, petroleum, medical treatment, aerospace |
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Feature |
High corrosion resistance, low density, good thermal stability |
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Technology |
Hot Forged, Hot Rolled, Cold Rolled, Annealing, Pickling |
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Surface |
Bright, Polished, Pickling, Acid cleaning, Sandblasting |
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Packing |
Export Standard Woodcase |
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Delivery time |
10-25days according to the quantity and process of the product |
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Quality and test |
Hardness test, Bending test, Hydrostatic etc. |
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Grade |
GR1,GR2,GR3,GR5,GR6,GR7,GR9,GR11,GR12, etc. |
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Standard |
ASTM B265,ASTM F136,ASTM F67,AMS4928 |
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Size |
0.5-5.0mm x 1000mm x 2000-3500mm (Thickness x Width x Length) |
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Application |
Metallurgy, electronics, machinery, medical treatment, chemical industry, petroleum, medical treatment, aerospace |
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Supply status |
M (Y/ R/ ST) |
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Feature |
High corrosion resistance, low density, good thermal stability |
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Technics |
Hot Forged, Hot Rolled, Cold Rolled, Annealing, Pickling |
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Surface |
Bright, Polished, Pickling, Acid cleaning, Sandblasting |
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Packing |
Export Standard Woodcase |
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Payment terms |
T/T, L/C, D/A, D/P, Escrow, Western Union, PayPal |
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Certificate |
ISO 9001:2008; The third test report; TÜV Rheinland; |
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Delivery time |
7-15days according to the quantity and process of the product |
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Quality and test |
Hardness test, Bending test, Hydrostatic etc. |
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Material |
Pure titanium and Titanium alloy |
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Titanium Grade |
GR1/GR2/GR3/Gr4/GR5/GR7/GR9/GR12/Gr5Eli/Gr23
ERTi-1/ERTi-2/ERTi-3/ERTi-4/ERTi-5Eli/ERTi-7/ERTi-9/ERTi-11/ERTi-12 Ti15333/Nitinol Alloy |
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Standard |
AWS A5.16/ASTM B863/ASME SB863, ASTMF67, ASTM F136, ISO-5832-2(3) etc |
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Shape |
Titanium Coil Wire/Titanium Spool Wire/Titanium Straight Wire |
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Wire Gauge |
Dia(0.06--6) *L |
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Process |
Bar billets-hot rolling-drawing-annealing-strength-pickling |
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Surface |
Polishing, picking, acid washed, black oxide |
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Main Technique |
Hot Forged; Hot Rolled; Cold drawn; Straighten etc |
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Material Milling Certificate |
According to. EN 10204.3.1 |
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Application |
Welding, Industry, Medical, Aerospace, Electronic etc |
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Material Available |
Aluminum, Stainless Steel, Carbon Steel, Brass, Bronze, Copper, Titanium and etc |
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Surface Treatment Available |
Anodized, Nickel Plated, Zinc Plated, Chrome Plated, Passivation, Electrophoresis, Electropolishing, Painting, Powder Coated, etc |
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Certificate &Standard |
ISO9001 certified factory with good quality control and all of our products are 100% inspected before delivery. |
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Equipments |
Over 28 CNC Milling Machines (3,4, 5 Axis) & 22 CNC Turning machines can support your large order demand. |
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Design |
OEM & ODM are welcome, and also we have a R&D team and can help your design and develop your products |
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Application |
Different kinds of cars, machinery, home appliance, electronic products, electric appliance, stationery, computers, power |
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MOQ |
No quantity limitation |
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Samples |
Welcome you to request samples to test and check the quality. |
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Delivery & Shipping |
We can deliver to over 50 countries all over the world, shipping by DHL, FedEx, UPS, etc around 3 to 5 days |
GNEE is a specialized manufacturer and exporter of high-quality titanium products, including pipes, sheets, bars, wires, and fabricated parts.
We utilize advanced CNC machining, rolling, and welding equipment to ensure precision manufacturing. All products undergo strict chemical, mechanical, and non-destructive testing to guarantee compliance with international standards.
Our export-safe packaging includes wooden crates and waterproof wrapping to ensure secure delivery. If you have any needs, please feel free to contact us immediately：info@gneemetal.com
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