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Products & Solutions
Processing Piping
Processing Piping
Processing Piping（ Chemical Plans Pipes| Industrial Piping for Chemical industry)
1) Overview
Chemical Plant Pipes are critical piping solutions designed for chemical production facilities, process pipelines, and corrosive service environments. They are mainly used for the transportation of acids, alkalis, salt solutions, corrosive gases, and high-temperature/high-pressure media.
The product range covers carbon steel pipes, alloy steel pipes, stainless steel pipes, nickel alloy pipes, and lined composite pipes. All pipes comply with ASME, ASTM, API, GB/T, DIN international standards, and offer excellent corrosion resistance, high temperature and pressure tolerance, wear resistance, and dimensional accuracy. They are widely applied in reactors, distillation columns, heat exchangers, process piping networks, and pressure vessels, ensuring the safety and reliability of chemical plants.
2) Manufacturing Process
• Seamless pipes: Hot rolling, cold drawing
• Welded pipes: Longitudinal welded (LSAW), Submerged arc welded (SAW), High-frequency welded (HFW), Laser welded
• Special alloy pipes: Secondary refining (AOD/VOD), Vacuum melting
• Heat treatment: Solution annealing, normalizing, quenching & tempering, bright annealing
• Surface treatment: Pickling & passivation, sandblasting, coating, anti-corrosion lining (PTFE, glass flake, rubber lining)
• Processing capabilities: Cutting, beveling, bending, welding, threading
3) Grades & Standards
Main Standards:
• ASTM A106 / A335 (Carbon steel & alloy steel seamless pipes)
• ASTM A312 / A358 (Stainless steel seamless/welded pipes)
• API 5L (Pipeline steel pipes)
• GB/T 14976 (Stainless steel pipes for fluid service)
• EN 10216 (Seamless pressure pipes)
Typical Grades:
• Carbon Steel: 20#, Q345, ASTM A106 Gr.B, API 5L Gr.B
• Alloy Steel: Cr-Mo series (12Cr1MoV, 15CrMo, ASTM A335 P11/P22/P91)
• Stainless Steel: 304, 304L, 316L, 321, 347, 904L
• Duplex Stainless Steel: 2205 (UNS S31803), 2507 (UNS S32750)
• Nickel Alloys: Inconel 600/625, Hastelloy C-276, Monel 400
• Titanium: Gr.2, Gr.5 (for highly corrosive media)
• Composite Pipes: Carbon steel base + PTFE, glass flake, rubber, enamel lining
4) Dimensions
• Outer Diameter (OD): Φ6 – 3000 mm
• Wall Thickness (WT): 1 – 120 mm
• Length: 6 m, 12 m, or customized cut-to-length
• Pipe Ends: Plain end, beveled end, threaded end, flanged
5) Applications
• Process Equipment: Reactors, distillation towers, heat exchanger piping
• Pipeline Networks: Acid & alkali pipelines, brine pipelines, solvent and waste recovery pipelines
• High-Temperature & Pressure Systems: Steam pipelines, boiler superheaters, economizers, cracking furnaces
• Corrosive Media: Chlorine, sulfuric acid, hydrochloric acid, urea, ammonia synthesis units
• Chemical Plant Equipment: Pressure vessels, condensers, separators, storage tank piping
6) Key Features
• Corrosion Resistance: Suitable for acids, alkalis, chlorides, and strong oxidizing environments
• High Temperature & Pressure Resistance: Service temperature range from -196℃ to 600℃
• Strength & Toughness: Withstands fatigue, impact, and stress corrosion cracking
• Excellent Weldability: Reliable for field installation and retrofitting projects
• Flexible Options: Multiple materials, linings, and anti-corrosion coatings available
7) Quality & Testing
• Chemical Composition Analysis: Spectrometer testing
• Mechanical Testing: Tensile, impact, hardness tests
• Corrosion Resistance Tests: Salt spray, acid/alkali immersion, intergranular corrosion tests
• Non-Destructive Testing (NDT): Ultrasonic (UT), Radiographic (RT), Eddy current (ET), Magnetic particle (MT)
• Pressure Testing: Hydrostatic & pneumatic testing (100% inspected)
• Third-Party Certifications: SGS, TÜV, LR, BV
8) Supply & Packaging
• Supply Forms: Seamless pipes, welded pipes, complete piping systems
• Surface Protection: Oiling, anti-rust paint, galvanizing, PE/PP lining
• Delivery Options: Straight pipes, bent pipes, U-bend pipes, with fittings
• Packaging: Wooden cases, steel-strip bundling, protective film, plastic end caps
• Documentation: MTC (EN 10204 3.1/3.2), third-party inspection reports
9) Our Advantages
• Wide Material Coverage: Carbon steel, alloy steel, stainless steel, duplex steel, nickel alloys, titanium, composite pipes
• Superior Corrosion Resistance: Designed for the harshest chemical media environments
• Complete Processing Capability: Cutting, beveling, bending, welding, lining
• Proven Engineering Experience: Widely applied in chemical, petrochemical, fertilizer, and new material industries
• Reliable Quality: Strict QC system + international certifications
Materials & Dimensions of Pipes for Chemical Plants
1. Carbon Steel Pipes
• Standards: ASTM A106 Gr.B/C, API 5L Gr.B/X42, ASTM A53, GB/T 8163
• Dimensions:
• OD: ½” – 48” (21 – 1220 mm)
• WT: Sch10 – Sch160 (2 – 100 mm)
• Length: 6 m, 12 m, fixed or customized
• Applications: Low/medium-pressure pipelines, utilities, steam, water, inert gases
2. Cr-Mo Alloy Steel Pipes
• Standards: ASTM A335 P11, P22, P91, EN 10216-2
• Dimensions:
• OD: ½” – 36” (21 – 914 mm)
• WT: Sch20 – 150 mm
• Applications: High-temperature/high-pressure piping, hydroprocessing units, heater tubes, heat exchangers
3. Stainless Steel Pipes
• Standards: ASTM A312 (304/304L, 316/316L, 321, 347), GB/T 14976
• Dimensions:
• OD: 6 – 1200 mm
• WT: 1 – 50 mm
• Applications: Acid/alkali pipelines, chloride-containing media, corrosive gases, clean fluid service
4. Duplex & Special Alloys
• Duplex Stainless: 2205 (S31803), 2507
• Nickel Alloys: Inconel 600/625, Incoloy 825, Hastelloy C-276
• Low-Temperature Steel: ASTM A333, 9%Ni
• Dimensions:
• OD: ½” – 24” (21 – 610 mm)
• WT: Sch10 – 40 mm
• Applications: Sour water, aggressive chemicals, chloride-rich service, LNG transport
5. Lined & Clad Pipes
• Lined Pipes: PTFE, glass flake, rubber-lined steel pipes
• Clad Pipes: Stainless/carbon steel clad pipes, bimetallic pipes
• Dimensions: OD ½” – 36”, wall thickness per base + lining
• Applications: Strong acids/alkalis, corrosive fluids, chemical reactor piping
6. Typical Applications
• General Utility Service: Carbon steel pipes (A106, API 5L)
• High Temp/Pressure Units: Cr-Mo alloys (P22, P91)
• Corrosive Acid/Alkali Lines: Stainless steel pipes (316L, 321)
• Severe Corrosion: Duplex stainless, nickel alloys
• Cryogenic & Storage: A333, 9%Ni pipes for LNG service
• Special Conditions: Lined & clad pipes
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