Product Name
Petroleum Cracking Tube (High-Temperature, Corrosion-Resistant Furnace & Reactor Tube)
Introduction
Petroleum Cracking Tubes are specialized high-temperature, corrosion-resistant tubes designed for steam-cracking, catalytic cracking (FCC) and other high-temperature petrochemical processes. These tubes are intended for service in furnace coils, reactor lines, convective and radiant sections, and high-temperature interconnect piping where oxidation, carburization, sulfidation, and thermal fatigue are significant risks. Materials, heat-treatment and fabrication are selected and controlled to provide long creep life, oxidation/carburization resistance and reliable joint integrity under severe duty.
Typical Technical Data
| Item | Typical Range / Notes |
|---|---|
| Standards | ASTM A213, ASTM A335, ASME SB/T, EN 10216-2 (or client specification) |
| Common Alloys | Austenitic stainless steels (310S, 321H, 347H), Ni-based alloys (Inconel 600 / 625 / 690), heat-resistant grades (HK40, GH3030), custom Ni/Cr/Fe alloys |
| Construction / Manufacture | Seamless hot-rolled, hot-extruded or cold-drawn seamless; optional liner/cladding or bi-metallic construction |
| Typical OD | 19.05 mm – 219.1 mm (custom sizes available) |
| Typical Wall Thickness | 2.0 mm – 25.4 mm (selected by design / thermal stress) |
| Standard Lengths | 6 m / 12 m; custom cut-to-length, coils or spool bundles available |
| Service Temperature | ~300 °C – 1,100 °C (depends on alloy selection) |
| Design Pressure | Per ASME / project design (wall thickness and material chosen to meet stress) |
| Key Performance Requirements | Oxidation & carburization resistance, creep strength, thermal-fatigue resistance, dimensional stability |
Key Features & Benefits
High-Temperature Corrosion Resistance: Alloy chemistries selected to resist oxidation, carburization and sulfidation typical in cracker furnace and high-temperature process streams.
Long Creep & Thermal Fatigue Life: Thermo-mechanically optimized alloys and controlled heat-treatment (solution/ageing/PWHT where required) for extended life under sustained high stress and cyclic thermal swings.
Dimensional & Metallurgical Stability: Precision rolling/drawing and heat treatment minimize distortion, ensure uniform wall thickness and reduce tendency for carbide precipitation or embrittlement.
Weldability & Joint Reliability: Qualified WPS/PQR and recommended PWHT practices for reliable field or factory welds; special attention to filler metal match and pre/post-weld procedures.
Custom Options: Internal corrosion-resistant liners, welded cladding, overlay welding or composite tube constructions available for extremely aggressive chemistries to balance performance and cost.
Typical Applications
Steam-cracking furnace reaction tubes (ethylene/propylene production).
High-temperature lines in cracking furnaces (feed, effluent, transfer lines).
High-temperature sections of heat exchangers and convective/reaction coils.
FCC regenerator high-temperature piping and associated hot-gas lines.
Any process piping exposed to carburizing/oxidizing atmospheres, high H₂ or chlorinated streams at elevated temperatures.
Inspection & Quality Assurance
Material Verification: Mill chemical analysis and PMI to confirm alloy composition and heat numbers.
Mechanical Testing: Tensile, hardness and, where required, elevated-temperature or creep testing.
Non-Destructive Examination: 100% UT/RT on tube body and critical welds; PT/MT on weld surfaces as needed.
Metallurgical Examination: Macro/microstructure checks, grain-size, carbide distribution and inclusion assessment; special testing for carbon diffusion/carburization when required.
Optional High-Temperature Tests: Accelerated carburization, creep rupture, or thermal-fatigue trials for life-prediction on critical orders.
Documentation: Full MTC, NDT reports, heat-treatment records, dimensional inspection and traceability from melt to finished part.
Manufacturing & Fabrication Notes
Recommended Processes: Seamless hot-rolling or extrusion followed by solution anneal/stabilization for austenitics; controlled normalization/tempering and PWHT for certain Cr-Mo or ferritic grades.
Welding: Use qualified filler metals and WPS; in many cases, weld areas require PWHT or post-weld stabilizing to avoid local embrittlement.
Forming/Final Machining: Precision end-preparations, bevelling, and end-facing to suit tube-sheet or welding requirements.
Liner/Clad Options: In-situ weld overlay or metallurgically bonded cladding may be specified where cost precludes full alloy tube.
Packaging & Delivery
Protection: For oxidation-prone alloys, inner/outer protection with VCI film, inert gas flushed packing or vacuum packing is available. Light oil or protective film is used for carbon/stainless types.
End Protection: Rigid steel or plastic end caps and internal plugs to protect ID and threads/mating faces.
Crating & Securing: Wooden skids, steel frames or export crates with desiccants and clear identification tags.
Shipping Lead Time: Typical stock/alloy lead times 2–6 weeks; custom alloys, special testing or clad tubes 6–12+ weeks depending on scope.
Ordering Information & Technical Inputs Required
To recommend the correct material and deliver an accurate quotation, please provide:
Full process stream composition (notably S, Cl, H₂, steam %, hydrocarbon mix).
Maximum and minimum operating temperatures and normal operating temperature.
Design or maximum allowable pressure.
Expected service life and inspection/turnaround interval.
Any required field welding / PWHT constraints.
Preferred standards or customer specifications (if any).
Why Choose Us
Materials & Process Expertise: Alloy selection and heat-treat experience tailored for high-temperature petrochemical service.
Full QA Traceability: From melt practices to final inspection, we deliver full documentation and compliance with international codes.
Optional Life-Testing: Accelerated creep, carburization and thermal-fatigue testing available for critical projects.
Engineering Support: We provide WPS/PQR development, welding & PWHT guidance and on-site commissioning assistance.
Contact & Next Steps
Send your process details and operating conditions and we will provide material recommendations, calculated wall-thickness options, WPS suggestions and a formal quotation. Typical technical response and preliminary proposal available within 12 hours after receiving complete process data.
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