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Products & Solutions
Refinery Steel
Refinery Steel
Refinery Steel( Pipes, Fittings & Flanges)
1) Overview
Refineries are highly complex facilities that operate under extreme conditions of high temperature, high pressure, low temperature, and severe corrosion (sulfides, sour water, hydrogen). Therefore, pipes, fittings, and flanges used in refineries must provide reliable resistance to corrosion, hydrogen embrittlement, and creep.
Our product range covers:
• Pipes: Seamless, welded, stainless steel, alloy steel, nickel alloys
• Fittings: Elbows, tees, reducers, caps, forged fittings (SW/BW/THD)
• Flanges: Weld neck, slip-on, threaded, blind
All products conform to ASTM, ASME, API, GB/T, DIN standards, with certifications from NACE, ISO, PED, and third-party inspection (TUV, SGS, LR, BV).
2) Manufacturing Process
• Pipes: Hot rolled, cold drawn, extrusion, welded (LSAW/HFW/SAW)
• Heat Treatment: Normalizing, quenching & tempering, solution annealing
• Surface Protection: Pickling, passivation, sandblasting, epoxy/FBE coating, PTFE/Glass lining
• Fittings/Flanges: Forging, machining, welding, precision finishing
3) Grades & Standards
Carbon Steel Pipes
• ASTM A106 Gr.B/C, API 5L Gr.B/X42–X70, ASTM A53
• Applications: crude oil, water, steam, air, utility services
Cr-Mo Alloy Steel Pipes
• ASTM A335 P11, P22, P91
• Applications: hydrocracking, hydrotreating, reforming, steam lines, furnace tubes
Stainless Steel Pipes
• ASTM A312 (304/304L, 316/316L, 321, 347)
• Applications: sour water, chloride lines, fuel gas piping
Special Alloys
• Duplex Stainless Steel: 2205, 2507
• Nickel Alloys: Incoloy 800H/800HT, Inconel 625, Hastelloy C-276
• H₂S Resistant Pipes: NACE MR0175/ISO 15156 certified
Fittings & Flanges: ASME B16.5, B16.9, B16.11; DIN/EN 1092-1; GB/T 9112–9124
4) Dimensions
• Pipes: OD 6 – 1200 mm; WT 1 – 100 mm; Length 6m, 12m or custom
• Fittings: DN15 – DN1200 (BW/SW/THD)
• Flanges: DN15 – DN3000, Class 150 – 2500
5) Applications
• Distillation Units: crude and utility piping
• Hydrocracking / Hydrotreating Units: hydrogen service (P22, P91, Incoloy)
• Catalytic Cracking Units (FCC): high-temperature furnace tubes, regenerator air lines
• Sulfur Recovery Units (SRU): corrosive service (316L, Hastelloy)
• Sour Water / Chloride Systems: 316L, Duplex 2205
• LPG/LNG Storage & Transport: cryogenic steel (A333, 9%Ni)
6) Key Features
• Corrosion Resistance: against H₂S, sour water, chloride SCC
• High Temperature Service: safe up to 650℃
• Hydrogen Service Performance: Cr-Mo steels resist hydrogen embrittlement
• Mechanical Reliability: strength, toughness, fatigue resistance
• Excellent Weldability: optimized for refinery construction & retrofit
7) Quality & Testing
• Chemical Analysis: spectrometry
• Mechanical Tests: tensile, impact, hardness
• Corrosion Tests: sour water immersion, H₂S resistance
• NDT: UT, RT, ET, MT
• Pressure Testing: hydrostatic & pneumatic 100%
• Certifications: NACE MR0175/ISO 15156, API 571, third-party inspection
8) Supply & Packaging
• Forms: Seamless/welded pipes, fittings, flanges, complete piping systems
• Surface Protection: oiled, painted, galvanized, epoxy coated
• Packaging: bundled, wooden cases, plastic end caps, export racks
• Documents: MTC (EN 10204 3.1/3.2), class society & NACE certificates
9) Our Advantages
• Wide Material Coverage: carbon, Cr-Mo alloy, stainless, duplex, nickel alloys
• Compliance: ASTM, ASME, API, NACE standards
• Tailored Solutions: customized selection based on Nelson Curve & API 571
• Industry Experience: extensive supply to refineries, petrochemical plants, oil & gas pipelines
• Quality Assurance: strict QC + international third-party inspection
Materials & Dimensions of Pipes, Fittings & Flanges for Refineries
1. Carbon Steel
• Pipes: ASTM A106 Gr.B/C, API 5L; used for water, air, low-pressure steam, and non-corrosive fluids.
➝ Size Range: OD ½” – 48”, wall thickness Sch40 – Sch160.
• Fittings: Butt-weld elbows, tees, reducers → ASTM A860 WPHY42/52.
➝ Size Range: DN15 – DN1200, wall thickness Sch40 – Sch160.
• Flanges: ASTM A105 forged steel flanges (most common, economical, pressure resistant).
➝ Size Range: DN15 – DN2000, pressure Class 150 – 2500.
Applications: Atmospheric distillation, cooling water, utility pipelines.
2. Cr-Mo Alloy Steel
• Pipes: ASTM A335 P11, P22, P91 → designed for high-temperature, high-pressure, and hydrogen service.
➝ Size Range: OD ½” – 36”, wall thickness Sch40 – 150 mm.
• Fittings: ASTM A234 WP11/WP22 butt-weld fittings.
➝ Size Range: DN15 – DN1200, wall thickness Sch40 – Sch160.
• Flanges: F11, F22, F91 alloy steel forgings.
➝ Size Range: DN25 – DN2000, pressure Class 300 – 2500.
Applications: Hydrocracking, hydrotreating, fired heaters, steam systems.
3. Stainless Steel
• Pipes: ASTM A312 304/316L/321/347 → excellent corrosion resistance.
➝ Size Range: OD 6 mm – 1200 mm, wall thickness 1 – 50 mm.
• Fittings: ASTM A403 WP304/316, socket-weld and butt-weld types.
➝ Size Range: DN15 – DN600, wall thickness Sch10s – Sch80s.
• Flanges: ASTM A182 F304/F316 stainless steel flanges.
➝ Size Range: DN15 – DN1500, pressure Class 150 – 1500.
Applications: Acidic water, sulfide-containing fluids, chloride-rich environments, clean fuel gas, SRU (sulfur recovery units).
4. Special Alloys
• Duplex Stainless Steel (2205/2507): for seawater cooling and chloride stress environments.
➝ Size Range: OD ½” – 24”, wall thickness Sch10 – Sch80.
• Nickel Alloys (Inconel, Incoloy, Hastelloy): used in high-temperature cracking furnaces, steam reformers, and aggressive acidic media.
➝ Size Range: OD ½” – 12”, wall thickness 1 – 30 mm.
• Low-Temperature Steels (A333, 9%Ni): for LPG/LNG storage tanks and cryogenic pipelines.
➝ Size Range: OD ½” – 36”, wall thickness Sch20 – Sch160.
• NACE H₂S-Resistant Steels: for sour service (H₂S stress corrosion cracking prevention).
➝ Size Range: Custom designed, commonly OD ½” – 24”.
Applications: Cracking furnaces, cryogenic storage & transportation, sour oil & gas processing.
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