Product Description
Manufactured in our specialized metallurgical casting and machining facilities in Jingjiang, our Reformer Tubes are high-alloy, centrifugally cast catalyst-filled process tubes engineered to operate as the primary reaction core inside steam methane reforming (SMR) and hydrogen production furnaces. Building upon our 26 years of high-alloy casting expertise and international quality certifications under ASME "U" and "S" stamps, we produce each Reformer Tubes assembly using micro-alloyed, heat-resistant austenitic alloys that provide exceptional creep rupture strength, high-temperature oxidation resistance, and microstructural stability under metal temperatures reaching 1,050°C. By employing horizontal centrifugal casting followed by precision internal pull-boring, these high-integrity Reformer Tubes maintain uniform wall thicknesses and clean inner surfaces that optimize heat transfer to reforming catalysts, giving global syngas, ammonia, and refinery operators a reliable tube system engineered for extended service lives exceeding 100,000 operating hours.
Applications
Steam Methane Reformers (SMR): Serving as catalyst-filled radiant reaction tubes in primary steam reformers for hydrogen and synthesis gas generation.
Ammonia & Methanol Production Furnaces: Housing high-activity nickel catalysts to convert natural gas and steam into synthesis gas under continuous high-temperature service.
Refinery Hydrogen Plants: Operating in top-fired and side-fired hydrogen production reformers to supply high-purity hydrogen for hydroprocessing complexes.
Furnace Retubing & Revamp Turnarounds: Providing exact replacement tube assemblies, harps, and catalyst tube spools for scheduled plant revamps and life-extension projects.
Technical Specifications
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Manufacturing Standards |
ASME Section VIII Div. 1, ASME B31.3, ASTM A608, DIN 17465, API 530 / API RP 573 |
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Casting Process |
Horizontal centrifugal casting with automated mold spinning and controlled directional solidification |
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Material Grades |
Micro-alloyed heat-resistant alloys: 25Cr35NiNb + Micro (Ti, Zr, Rare Earths), HP40Nb, 35Cr45NiNb, HK40 |
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Tube Dimensions |
Outer diameter (OD) from 70 mm to 200 mm; Wall thickness from 8 mm to 25 mm; Single cast lengths up to 4,500 mm (welded into assemblies up to 15,000 mm) |
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Internal Bore Quality |
100% full-length pull-bored to an internal surface roughness of Ra ≤ 3.2 µm, removing the internal shrinkage porosity layer |
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Design Operating Temperature |
Continuous tube metal design temperature up to 1,050°C (short-term excursions up to 1,100°C) |
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Design Operating Pressure |
Internal process pressure up to 4.5 MPa |
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100,000-Hour Creep Rupture Strength |
Exceeding standard Larson-Miller parameter thresholds across all micro-alloyed HP grades |
Customization Capabilities
Complete Harp & Spool Pre-Assembly: Supplying single reformer tubes or complete pre-fabricated harp assemblies with welded inlet pigtails, outlet weldolets, bottom catalyst support grids, and top flanges.
Micro-Alloy Metallurgy Optimization: Formulating proprietary trace-element additions (Ti, Zr, Nb, rare earths) to maximize long-term creep rupture strength and thermal fatigue resistance.
Internal Surface Profiling: Optional internal helical rifling or micro-fin pull-boring to enhance gas turbulence and improve internal convective heat transfer coefficients.
Flexible Dimensional Configurations: Customizing tube wall thicknesses, overall lengths, and attachment hardware to match licensed reformer designs without re-engineering furnace internals.
Zero MOQ Restriction: Supporting emergency replacement orders for individual damaged tubes as well as complete retubing packages comprising hundreds of tube assemblies.
Quality Control
Certified Factory Accreditations: Manufactured under ASME "U" and "S" stamps, ISO 9001:2015, and ISO 3834-2 International Welding Quality accreditation.
QR Code Traceability on Every Tube: Each cast tube section carries a laser-etched QR code linked to certified melting heat chemical analysis, centrifugal casting parameters, and inspection records.
100% Comprehensive Non-Destructive Testing: 100% full-length Ultrasonic Testing (UT) / Eddy Current Testing (ET), 100% Radiographic Testing (RT) on circumferential welds, and Liquid Penetrant Testing (PT) on all machined surfaces.
High-Temperature Mechanical Verification: Routine room-temperature tensile testing, high-temperature tensile testing, and accelerated creep rupture tests performed on representative casting heats.
Export-Grade Heavy Packaging: Heavy-duty wooden crating with custom internal contoured supports and vapor-barrier wrapping to prevent bending and surface contamination during ocean shipping.
FAQ
Q: Why is internal pull-boring critical for centrifugally cast reformer tubes?
A: Centrifugal casting pushes lighter slag and shrinkage porosity toward the inner diameter. Full-length internal pull-boring removes this porous inner layer, ensuring a dense, defect-free metal wall with uniform wall thickness and improved heat transfer to the catalyst.
Q: What is the typical manufacturing lead time for a complete set of reformer tubes?
A: A full furnace retubing set typically requires 4 to 6 months from material confirmation and drawing approval to final inspection. Emergency replacement sets can often be expedited within 3 months.
Q: What warranty coverage do you provide for reformer tube assemblies?
A: We provide an 18-month warranty from site arrival or 12 months from commercial operation (whichever comes first), backed by technical documentation and welding procedure specifications (WPS).
Q: What payment terms and currencies do you accept for export contracts?
A: We support EXW and FOB shipping terms. Our standard commercial milestones are 30% advance deposit, 40% manufacturing milestone payment, and 30% balance prior to factory dispatch, payable in USD, EUR, or RMB.
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