Alloy 800/800H Pipe For Chemical industry

2. Chemical Piping Standards: ASME B31.3 (Process Piping), ASME B31.1 (Power Piping)

3. Pressure Vessel Standards: ASME Section VIII Div.1, PED 2014/68/EU

4. Testing Standards: ASTM E8, ASTM E23, ASTM E139 (Creep), ASTM G54 (Oxidation)

5. Quality Management Standards: ISO 9001, ISO 14001, OHSAS 18001

2. Alloy 800H (UNS N08810): Creep-optimized grade (0.05-0.10% C, ASTM grain size ≥5)

3. Alloy 800HT (UNS N08811): Maximum creep strength grade (0.06-0.10% C, Al+Ti 0.85-1.20%)

4. Equivalent Grades: NS1101/NS1102 (China), Incoloy 800/800H (USA), Nicrofer 3221 (Germany)

2. Chromium (Cr): 19.0-23.0 (primary element for oxidation and carburization resistance)

3. Iron (Fe): Balance (≥39.5%, improves formability and reduces cost)

4. Carbon (C): ≤0.10 (800); 0.05-0.10 (800H); 0.06-0.10 (800HT)

5. Aluminum (Al): 0.15-0.60

6. Titanium (Ti): 0.15-0.60

7. Manganese (Mn): ≤1.50

8. Silicon (Si): ≤1.00

9. Sulfur (S): ≤0.015

Note: Higher carbon and controlled grain size in 800H provide 2-3x better creep strength than standard 800 above 650℃

1. Tensile Strength (RT): 515-690 MPa

2. 0.2% Yield Strength (RT): ≥205 MPa

3. Elongation (δ5): ≥40%

Alloy 800H:

1. Tensile Strength (RT): 450-650 MPa

2. 0.2% Yield Strength (RT): ≥170 MPa

3. Elongation (δ5): ≥35%

High-Temperature Properties (800H):

1. Tensile Strength (700℃): ≥180 MPa

2. Creep Rupture Strength (700℃, 10,000h): ≥45 MPa

3. Maximum Continuous Service Temperature: 900℃

2. Welded Pipes: Ø10-200mm ±0.2mm; Wall thickness ±0.10mm

3. U-Bend Pipes: Bend radius ±0.5mm; Ovality at bend ≤3% of OD

4. Length Tolerance: ±2mm (1-12m); custom lengths up to 18m available

– Forms a dense, adherent chromium oxide layer that resists spalling up to 900℃

– Mass loss <2 mg/cm² after 1,000 hours at 900℃ per ASTM G54

– Outperforms 310S stainless steel by 3-5 times in high-temperature oxidation

2. Superior Carburization and Sulfidation Resistance:

– Excellent resistance to carburization in hydrocarbon processing environments

– Carbon penetration <0.5mm after 5 years at 650℃

– Good sulfidation resistance in H₂S-containing environments up to 550℃

3. Exceptional Creep and Rupture Strength:

– Alloy 800H is specifically designed for long-term service above 650℃ where creep is the primary failure mode

– Coarse grain structure and controlled carbon content provide superior creep resistance

– Maintains structural integrity for 10+ years in continuous high-temperature operation

4. Excellent Thermal Stability:

– No harmful σ-phase precipitation below 850℃ after long-term exposure

– Retains ductility and toughness even after prolonged high-temperature service

– Resists thermal fatigue during cyclic heating and cooling

5. Superior Cost-Effectiveness:

– 30-40% lower material cost than Inconel 600 and 60-70% lower than Inconel 625

– Service life 5-10 times longer than 304/316 stainless steel in high-temperature applications

– Lower fabrication costs due to excellent formability and weldability

– Applications: Ethylene cracking coils, reformer tubes, furnace tubes, transfer lines, heat exchanger tubes, quench coolers

– Customers: ExxonMobil, Shell, BP, Chevron, TotalEnergies, Saudi Aramco, Sinopec

2. Fertilizer and Ammonia Industry:

– Applications: Steam methane reformer tubes, ammonia converter internals, heat exchanger tubes, process piping

– Customers: Yara International, Nutrien, Mosaic, CF Industries, OCP Group, Sinochem

3. Methanol and Hydrogen Production:

– Applications: Reformer outlet manifolds, process piping, heat exchanger tubes, furnace components

– Customers: BASF, Dow Chemical, Linde, Air Liquide, Methanex

4. Heat Treatment and Metallurgical Industry:

– Applications: Furnace tubes, radiant tubes, muffles, retorts, heat treatment fixtures

– Customers: Bodycote, Ipsen, Seco/Warwick, major automotive and aerospace heat treaters

5. Power Generation Industry:

– Applications: Superheater tubes, reheater tubes, flue gas desulfurization (FGD) piping, heat exchanger tubes

– Customers: Siemens Energy, GE Power, Mitsubishi Heavy Industries, EDF, State Grid

6. Nuclear Industry:

– Applications: Steam generator tubing, reactor internals, process piping

– Customers: Areva, Westinghouse, Rosatom, China National Nuclear Corporation

– High-Temperature Strength: Must maintain sufficient strength and creep resistance at operating temperatures up to 900℃

– Oxidation Resistance: Must resist oxidation and scaling in high-temperature flue gas environments

– Carburization Resistance: Must resist carburization in hydrocarbon processing environments

– Thermal Fatigue Resistance: Must withstand cyclic heating and cooling without cracking

– Weldability: Must be easily weldable while retaining high-temperature properties

2. Quality and Compliance Requirements:

– Material Standard Compliance: Must meet all requirements of ASTM B407, ASTM B704 and ASME SB407

– ASME B31.3 Compliance: Must comply with process piping code for chemical plant construction

– Full Traceability: Must provide 100% traceability from raw material ore to finished product

– Material Certification: Must provide comprehensive MTRs including chemical analysis, mechanical properties and creep test results

– Third-Party Inspection: Must allow inspection by TÜV, SGS, BV or other authorized organizations

3. Manufacturing Requirements:

– Precision Dimensional Tolerances: Must meet tight tolerances for proper fit and assembly of piping systems

– Surface Quality: Must have a smooth, defect-free surface to prevent oxidation initiation

– Internal Quality: Must be free from inclusions, porosity and segregation (100% UT/ET verified)

– Consistent Quality: Must have uniform chemical composition and grain size across all batches

– Heat Treatment Control: Must undergo proper solution annealing to achieve required grain size and properties

4. Supply Chain Requirements:

– Reliable Delivery: Must meet tight project schedules and plant turnaround deadlines

– Emergency Response: Must provide expedited production for unplanned shutdowns

– Small Batch Capability: Must produce small quantities for prototype development and maintenance

– Global Supply Capability: Must deliver to chemical plants worldwide with consistent quality

– Inventory Management: Must offer stock holding solutions to reduce customer inventory costs

5. Cost Requirements:

– Competitive Pricing: Must offer fair pricing while maintaining the highest quality standards

– Low Total Cost of Ownership: Must provide long service life and reduced maintenance costs

– Value-Added Services: Must offer cutting, bending, welding and end processing services

2. Alloy 800/800H Welded Pipes: Cost-effective solution for large-diameter and low-to-medium pressure applications

3. Alloy 800/800H U-Bend Pipes: Custom bent pipes for high-temperature heat exchangers and condensers

4. Alloy 800/800H Fittings: Elbows, tees, reducers, flanges and couplings for high-temperature piping systems

5. Alloy 800/800H Forgings: Custom forgings including valve bodies, pump casings and flanges

6. Alloy 800/800H Welding Materials: Electrodes, wires and filler metals for high-temperature welding

7. Alloy 800/800H Machined Components: Precision-machined valves, fittings and heat exchanger parts

8. Alloy 800/800H Sheets and Plates: Used for manufacturing tanks, vessels and furnace components

9. Alloy 800/800H Bars and Rods: Used for manufacturing shafts, bolts and structural components

10. Custom Fabricated Assemblies: Pre-fabricated piping spools and heat exchanger bundles

2. Dedicated High-Temperature Alloy Production Line: We operate a dedicated clean production line for Alloy 800/800H pipes, ensuring strict control over chemical composition and grain size

3. Full-Process Quality Control: We implement comprehensive quality control including 100% ultrasonic, eddy current and hydrostatic testing

4. Complete International Certifications: Our products meet all major international standards and hold ASTM, ASME, PED and ISO 9001 certifications

5. Advanced Customization Capability: We can produce custom sizes, lengths, wall thicknesses and end processing according to your drawings

6. Global Chemical Supply Chain Experience: We have extensive experience supplying to major chemical and petrochemical companies worldwide with reliable on-time delivery

7. Professional Technical Support: Our team of metallurgical engineers and high-temperature alloy specialists provides expert guidance on material selection

8. One-Stop Solution: We provide complete solutions from raw material supply to pre-fabricated piping assemblies, reducing your supply chain complexity

2. Full Material Traceability: Every pipe has a unique heat number and complete traceability documentation from raw material to finished product

3. Value-Added Processing: We offer precision cutting, CNC bending, welding, end processing and surface finishing services

4. Prototype Development Support: We support small batch prototype orders with fast turnaround times

5. Emergency Response Service: We provide 24/7 emergency service for unplanned plant shutdowns with expedited shipping

6. Market Growth: The global Alloy 800/800H pipe market is projected to grow at a CAGR of over 5% through 2030, driven by increasing demand from petrochemical and hydrogen production industries

7. Sustainability Commitment: All our products are manufactured using sustainable practices and are 100% recyclable

2. Waterproof Film: Each pipe is individually wrapped in waterproof and anti-corrosion film

3. Bundle Packing: Pipes of the same size are bundled with steel straps and wooden spacers to prevent contact damage

4. Wooden Case: Bundles are packed in sturdy fumigated wooden cases with steel reinforcement for international shipping

5. Export Standard Packing: All packaging complies with international export standards and ISPM 15 regulations

6. Marking: Each package is clearly marked with product specifications, heat number, quantity and destination