Industrial Heat Exchanger Series

We design and stamp to all major international pressure vessel and heat exchanger codes. Most export orders are built to:

• • ASME Section VIII Div.1 / Div.2 with U or U2 stamp — the most common requirement for Americas, Middle East, and Southeast Asia projects
• • TEMA standards (R, C, or B class) for shell and tube mechanical design, combined with ASME pressure design
• • EN 13445 / PED 2014/68/EU with CE marking for European projects
• • GB 150 / GB 151 for Chinese domestic or dual-standard projects
• • API 661 for air-cooled heat exchangers in refinery and petrochemical service

If your project specifies a combination — e.g. ASME pressure design + TEMA mechanical + NACE MR0175 materials — we can work to all simultaneously and document accordingly.

The fastest path to an accurate quotation is a filled-in datasheet (TEMA format preferred). If you don't have one yet, we need:

Even a rough spec sheet allows us to return a budgetary quote within 24 hours. For final orders we will issue a detailed datasheet for your approval before manufacturing begins.

Material selection is one of the most consequential decisions in heat exchanger design. Our approach:

• • Carbon steel (SA-179 / SA-106): Standard for clean water, steam, light hydrocarbons below ~250°C — lowest cost, widest availability
• • Stainless steel 304L / 316L: Aqueous corrosive services, food/pharma, mild chloride environments
• • Duplex (2205 / 2507): High-chloride seawater or brine, combines strength with corrosion resistance
• • Titanium Gr.2 / Gr.12: Seawater coolers, chlorinated water, where stainless would pit — common in power plant condenser retrofit
• • Hastelloy C-276 / Inconel 625: Highly oxidizing acids, HCl, mixed acid service, chemical reactors
• • NACE MR0175 compliance: Required for any H₂S-containing streams above threshold — affects material certs, hardness limits, and PWHT

We review your fluid analysis and recommend the most cost-effective option. In borderline cases we will advise you honestly rather than default to the most expensive alloy.

Our practical manufacturing limits depend on heat exchanger type:

For ultra-high pressure (above 30 MPa) or cryogenic service, send us the datasheet first — we will confirm feasibility and any special manufacturing requirements before quoting.

Fouling is the single largest cause of heat exchanger performance degradation. We address it at the design stage:

• • Fluid allocation: The fouling fluid goes tube-side whenever possible — tubes are easy to clean mechanically; shell side is much harder to access. Exceptions: corrosive fluids that attack the shell, high-pressure fluids where thick shells are expensive
• • Velocity design: Tube-side velocity maintained above 1.5 m/s (liquids) to reduce particulate settlement; below 3 m/s for erosion-sensitive fluids
• • TEMA fouling factors: We apply TEMA Table RGP-T-2.4 fouling resistances as minimums; client-specified values used where provided
• • Bundle design for cleanability: Fixed tubesheet for clean service (cheapest, best heat transfer); removable U-tube or floating head for fouling service requiring hydroblast cleaning
• • Anti-fouling coatings: Available on tube OD for cooling water service — reduces biofilm attachment in open-loop cooling systems

Our standard NDT scope for ASME U-stamp units (additional tests available on request):

All NDT results are documented with inspector name, date, technique, and accept/reject criteria. Reports are included in the final documentation book.

Every unit ships with a complete documentation dossier. Standard contents:

• • ASME U-1 Data Report (or equivalent national report for other codes)
• • EN 10204 3.1 Material Test Reports for all pressure parts — shell, heads, nozzles, tubes, tubesheets, flanges
• • Welding Procedure Specifications (WPS) and Procedure Qualification Records (PQR)
• • Welder performance qualification records
• • NDT reports — RT films/digital files, PT/MT reports, UT scan records as applicable
• • Hydrostatic test certificate with date, pressure, hold time, and inspector signature
• • Dimensional inspection report
• • PWHT charts where required
• • As-built datasheet and drawings in PDF and DXF/DWG format
• • Operation and maintenance manual

Documents are provided in English as standard. Certified translations into other languages are available on request. Hard copies and digital (USB) delivery both available.

We welcome and actively facilitate third-party inspection. Our process:

• • ITP issued at order kick-off — Inspection Test Plan defines all witness (W), hold (H), review (R), and surveillance (S) points. Client signs off before fabrication starts
• • Advance notification — minimum 5 working days notice before each witness/hold point. We never spring tests on inspectors
• • Pre-inspection document packages — material certs, WPS, traveler, and dimensional drawings pre-staged for inspector arrival
• • Inspector access — unrestricted access to all manufacturing stages including supplier material receiving
• • Inspection agencies accepted: SGS, TUV Rheinland, Bureau Veritas, Lloyds Register, DNV, Intertek, and client-nominated agencies

Inspection costs (agency fees) are typically quoted as a separate line item so they are transparent. We can include them in the order if you prefer a turnkey delivery.

Lead times depend on complexity, size, and material lead times. Typical schedule from order confirmation:

Expedited delivery is possible for standard sizes with pre-purchased materials — contact us for urgent project scheduling.

Maintenance frequency is driven by service severity, not a fixed calendar. Our recommendations:

• • Clean services (steam, condensate, clean water): Inspect every 3-5 years during planned turnaround. Hydrostatic re-test every 10 years or per jurisdictional rules
• • Moderate fouling (cooling tower water, lube oil): Annual performance monitoring; clean when overall heat transfer coefficient drops 15-20% from design, typically every 1-2 years
• • Heavy fouling (raw river water, process streams with solids): Quarterly inspection; online performance tracking recommended with differential temperature monitoring
• • Corrosive service: Annual external inspection plus UT thickness measurement on shell; tube sample pulled and visually/UT inspected every 3-4 years

We provide a maintenance schedule recommendation with every unit delivered based on your specified service conditions. Spare tube bundles or tube sets can be ordered at time of main equipment purchase for minimum spare inventory cost.