Stainless Steel Reactor Technical Parameters

1.Material Standards

Main Materials:

• o 304/304L: General purpose, resists weak corrosion (nitric acid, organic acids), temperature range -196~400°C
• o 316/316L: Contains Mo (2.5%), resists chloride corrosion, suitable for pharmaceutical/food industries
• o 321: Contains Ti, resists intergranular corrosion, suitable for high temperatures (≤800°C)
• o Duplex 2205: High strength, resists chloride stress corrosion, suitable for harsh corrosive environments

Surface Treatment:

• o Mechanical Polishing: Ra≤0.4μm (mirror finish), meets GMP requirements
• o Electropolishing: Ra≤0.2μm, for ultra-clean applications
• o Sandblasting: Ra=0.8~1.6μm, for industrial environments

2.Pressure Ratings

3.Wall Thickness Calculation

Formula (ASME VIII Div.1):

• Cylinder thickness t = (P × R) / (S × E - 0.6P) + C
• o P: Design pressure (Mpa)
• o R: Inner radius (mm)
• o S: Allowable stress (e.g., 316L@150°C=129 Mpa)
• o E: Weld joint efficiency (0.85~1.0)
• o C: Corrosion allowance (0~3 mm)

Typical Wall Thickness Reference (Vertical Reactors):

4.Functional Configurations

Heat Transfer Structures:

• o Jacket Types: Half-pipe jacket (pressure ≤4.0 Mpa), full jacket (pressure ≤1.0 Mpa)
• o Internal Coils: For high heat transfer requirements

Agitation Systems:

• o Top-Entry Agitator: Power 0.75~110 kW, speed 50~500 rpm
• o Bottom-Entry Agitator: For high solid content materials
• o Side Agitator: For high-viscosity materials (viscosity ≤50,000 cP)

Instrument Interfaces:

• o Temperature: PT100 (accuracy ±0.1°C)
• o Pressure: Pressure transmitter (accuracy ±0.5% FS)
• o pH/ORP: Online monitoring, corrosion-resistant electrodes

5.Special Design Options

Sanitary Design (3-A/BPE Standards):

1. o Internal radius R≥10mm, dead-leg free design
2. o Quick-opening manways (DN400~500), CIP/SIP capability

Corrosion Enhancement:

1. o PTFE lining/Halar coating (resists strong acids)
2. o Cathodic protection (for special corrosive environments)

Insulation Structure:

1. o Polyurethane foam (thickness 50~100mm), stainless steel outer cladding

6.Quality Control

Non-Destructive Testing:

1. o Radiographic testing (RT): 100% testing of butt welds
2. o Penetrant testing (PT): Testing of all surface welds

Certifications:

1. o Material Certificates: EN 10204 3.1
2. o Pressure Vessel Certifications: ASME U Stamp/PED CE Mark

7.Selection Process

1. 1.Determine reaction type (polymerization, catalysis, synthesis, etc.) and process conditions
2. 2.Calculate volume and operating conditions (temperature, pressure, speed, etc.)
3. 3.Select material and surface finish grade
4. 4.Determine additional functions (agitation, heat transfer, etc.)
5. 5.Verify installation conditions (vertical/horizontal, support method)