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Yuhong Group Co.,Ltd

  • China,Ningbo ,Zhejiang
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China ASME VIII-1 U-Tube Heat Exchanger Clad UNS N06600 for Chlor-Alkali Process NACE
China ASME VIII-1 U-Tube Heat Exchanger Clad UNS N06600 for Chlor-Alkali Process NACE

  1. China ASME VIII-1 U-Tube Heat Exchanger Clad UNS N06600 for Chlor-Alkali Process NACE
  2. China ASME VIII-1 U-Tube Heat Exchanger Clad UNS N06600 for Chlor-Alkali Process NACE
  3. China ASME VIII-1 U-Tube Heat Exchanger Clad UNS N06600 for Chlor-Alkali Process NACE
  4. China ASME VIII-1 U-Tube Heat Exchanger Clad UNS N06600 for Chlor-Alkali Process NACE

ASME VIII-1 U-Tube Heat Exchanger Clad UNS N06600 for Chlor-Alkali Process NACE

  1. MOQ: 1Set
  2. Price: 1--1000000 USD
  3. Get Latest Price
Payment Terms T/T, L/C at sight
Supply Ability 60 SETS/MONTH
Delivery Time 45---150 DAYS
Packaging Details Requirements/ Ply-wooden Case/ Iron Case/ Bundle with plastic Cap
SHELL Carbon Steel (ASTM A516 Grade 70)
TUBES TP316L Stainless Steel
WELDING MATERIAL Nickel-Based Alloy (Inconel 625)
Flow Arrangement Double Pass
Design Pressure: 150 psi
Design Temperature: 400°F
Brand Name YUHONG
Model Number U Tube type
Certification ASME, ABS, DNV-GL , BV, LR , KR, CCS, PED, TUV, ISO9001, AD2000
Place of Origin CHINA

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  1. Product Details
  2. Company Details

Product Specification

Payment Terms T/T, L/C at sight Supply Ability 60 SETS/MONTH
Delivery Time 45---150 DAYS Packaging Details Requirements/ Ply-wooden Case/ Iron Case/ Bundle with plastic Cap
SHELL Carbon Steel (ASTM A516 Grade 70) TUBES TP316L Stainless Steel
WELDING MATERIAL Nickel-Based Alloy (Inconel 625) Flow Arrangement Double Pass
Design Pressure: 150 psi Design Temperature: 400°F
Brand Name YUHONG Model Number U Tube type
Certification ASME, ABS, DNV-GL , BV, LR , KR, CCS, PED, TUV, ISO9001, AD2000 Place of Origin CHINA
High Light ASME VIII-1 U-tube heat exchangerUNS N06600 heat exchangerNACE MR0175 heat exchanger

ASME VIII-1 U-Tube Heat Exchanger Clad UNS N06600 for Chlor-Alkali Process NACE MR0175​

The ASME VIII-1 U-Tube Heat Exchanger is designed specifically for the Chlor-Alkali Process, featuring a UNS N06600 (Inconel 600) alloy lining that complies with NACE MR0175 certification for Sulfide Stress Cracking (SSC) resistance. It is suitable for extreme conditions involving high chloride ions, high-temperature alkaline, and sulfur-containing media, such as in the production of vinyl chloride and caustic soda evaporators. Its double-pass U-tube design enhances turbulence, reduces fouling, and improves heat transfer efficiency by over 40%.


Base Material and Lining Material Parameters

Component Material Standard Key Features Applicable Conditions
Shell / Tube Sheet SA-516 Gr. 70 Carbon steel substrate, with compressive strength ≥ 485 MPa Design pressure ≤ 10 MPa
Lining / Heat Exchange Tube UNS N06600 (Clad) Ni ≥ 72%, Cr 14-17%, Fe 6-10%; resistant to chloride ion corrosion (≤0.05 mm/year), withstands dry chlorine gas at 510°C Temperature range: -196°C to 1093°C

Advantages of UNS N06600 Alloy

  • Corrosion Resistance: Corrosion rate in 80°C concentrated NaOH solution < 0.01 mm/year; withstands 50% boiling hydrochloric acid.
  • Mechanical Properties: High-temperature creep resistance (strength ≥ 240 MPa at 700°C), elongation ≥ 30%.
  • Process Compatibility: Supports TIG welding (filler ERNiCr-3) and hot extrusion forming; lining thickness ≥ 3 mm.

Cladding Process and Documentation Requirements

Key Cladding Steps

  1. Welding Material Selection: Use ERNiCr-3 wire (AWS A5.14), matching the N06600 alloy composition to prevent carbon migration.
  2. Process Specifications:
    • Preheat temperature: 90-120°C (carbon steel substrate)
    • Interpass temperature: ≤ 150°C
    • Post-weld heat treatment: 980°C solution annealing + water quench (to eliminate residual stress).

Required Quality Documentation

  1. Welding Procedure Qualification (WPS/PQR): Compliant with ASME Section IX, covering all positional welding parameters.
  2. Non-Destructive Testing Report:
    • Lining PT (Penetrant Testing) 100% coverage, no cracks or porosity.
    • Tube-to-tube sheet weld RT (Radiographic Testing) per ASME Sec. V standards.
  3. Corrosion Testing Report:
    • Neutral salt spray test (ASTM B117) ≥ 1000 hours without delamination.
    • Accelerated corrosion test in chlor-alkali medium (40% NaOH + 5% NaCl, 90°C).
  4. NACE MR0175 Certification: Verification of hydrogen sulfide stress cracking performance (H₂S partial pressure ≥ 0.3 kPa).

Technical Advantages and Design Innovations

  1. High-Efficiency Heat Transfer Structure:

    • U-tube double-pass design increases turbulence by 60%, reducing biological fouling compared to single-pass designs.
    • Optimized corrugated tubes (wall thickness 0.8 mm), heat transfer coefficient 8% higher than copper tubes.
  2. Adaptability to Extreme Conditions:

    • Thermal shock resistance: No leakage under a sudden temperature change of 200°C (simulating chlor-alkali process start-stop cycles).
    • Seismic design: Passes ASME Sec. III NF-level certification (nuclear power plant application standards).
  3. Lifespan and Maintenance Costs:

    • Design lifespan ≥ 20 years (average lifespan of copper tube heat exchangers is 10 years).
    • Removable tube bundle design reduces maintenance time by 50%.

Industry Applications and Certification Endorsements

  • Core Applications: Vinyl chloride reactor condensation, caustic soda evaporation concentration, sulfur-containing wastewater treatment.
  • Typical Clients:
    • China Chlor-Alkali Chemical Group (30 units in service, failure rate < 0.5 times/year).
    • Middle East petrochemical base (seawater cooling + high-sulfur crude oil conditions).
  • Full Chain Certifications:
    • ASME VIII-1 2025 (Pressure Vessel)
    • NACE MR0175/ISO 15156-3 (Sulfide Corrosion Resistance)
    • PED 2014/68/EU (EU Pressure Equipment Directive).

Company Details

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 and 

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 from Quality China Factory
  • Business Type:

    Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other

  • Year Established:

    2007

  • Total Annual:

    50M-70M

  • Employee Number:

    50~850

  • Ecer Certification:

    Verified Supplier

  YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR,  PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9...   YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR,  PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9...

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  • Yuhong Group Co.,Ltd
  • 20TH FLOOR,NO.1 NEW WORLD BUILDING ,NO.1018 MINAN ROAD,YINZHOU DISTRICT, NINGBO CITY, ZHEJIANG PROVINCE, CHINA
  • https://www.steelseamlesspipe.com/

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