Baffle Plates | China Professional Heat Exchanger Baffles Manufacturer & Supplier

What Are Baffle Plates & Their Core Functions in Heat Exchangers

Baffle plates are precision-machined internal components installed inside the shell of shell-and-tube heat exchangers, pressure vessels and condensers. They serve two fundamental engineering roles simultaneously: mechanical tube support and shell-side fluid flow management. Without properly designed and fabricated baffles, tube bundles would sag under gravity and thermal loading, fluid would bypass the tube bundle with minimal contact, and overall heat transfer efficiency would collapse.

As a China-based baffle plates fabricator and exporter, Jiangsu Liangyi designs and produces baffles in strict compliance with TEMA (Tubular Exchanger Manufacturers Association), ASME Section VIII and EN 13445 to meet the most demanding industrial working conditions across global markets.

Core Engineering Functions of Baffle Plates

• Tube Bundle Mechanical Support: Baffle plates fix and support heat exchanger tubes at defined spacing intervals, preventing tube sagging, vibration-induced fatigue and deformation under high temperature, high pressure and fluid impact loads. The unsupported tube span between baffles is a critical vibration design parameter specified in TEMA and ASME standards.
• Shell-Side Fluid Flow Optimization: Baffles force the shell-side fluid to flow perpendicular or helically across the tube bundle rather than axially along it, dramatically increasing the fluid velocity, turbulence intensity and heat transfer coefficient (h-value) on the shell side. A correctly designed segmental baffle can increase the shell-side heat transfer coefficient by 3–5× compared to unbaffled axial flow.
• Pressure Drop Control: Baffle spacing, baffle cut percentage and baffle type directly control the shell-side pressure drop. Improving these parameters allows engineers to balance thermal performance against pumping costs, a main factor in the total lifecycle cost of heat exchange equipment.
• Flow Dead Zone Prevention: Advanced baffle designs (NTIW, helical) eliminate stagnant shell-side zones where fouling accumulates and corrosion accelerates, extending equipment service intervals and reducing cleaning frequency.

Full Range of Baffle Types We Fabricate

Jiangsu Liangyi produces all common baffle plate designs. The chosen guide and comparison table below help heat exchanger designers and procurement engineers choose the right baffle type for their specific operating conditions.

1. Segmental Baffles — Single & Double Segmental

Segmental baffles are the most popular type of baffle used in industrial heat exchangers all over the world. A segmental baffle is a round plate with a straight cut-out part (the "segment" or "window") that lets fluids pass through. In a single segmental arrangement, alternating baffles are oriented with windows at the top and bottom, creating a zigzag cross-flow path for the shell-side fluid across the tube bundle.

Double segmental baffles have two windows cut from opposite sides of the disc, splitting the shell-side flow into two parallel streams per baffle interval. This lowers the pressure drop per baffle by about 40–60% compared to a single segmental with the same baffle spacing. The heat transfer rate stays the same, so double segmental is the best choice when the pump head is low.

Key Design Parameters We Machine To

• Baffle Cut (%): Standard range 20%–45% of shell ID. Most common is 25% for single segmental. Larger cut = lower pressure drop but also lower turbulence and heat transfer.
• Baffle Spacing: Per TEMA, minimum baffle spacing = greater of 50 mm or 20% of shell ID; maximum = 100% of shell ID. Typical range 30%–60% of shell ID in design practice.
• Tube-to-Baffle Hole Clearance: TEMA B allows max 0.8 mm diametral clearance for tubes up to 25 mm OD; TEMA R (process industry) allows max 0.4 mm diametral clearance. Jiangsu Liangyi can hold clearances to TEMA R class on all tube diameters.

Applicable Scenarios

• Conventional shell and tube heat exchangers (TEMA E, F, G, H, J, X shell types)
• Medium and low viscosity shell-side fluids in petrochemical, power and HVAC systems
• Condensers, reboilers, feed-effluent exchangers in refinery service
• Where maximizing heat transfer per unit shell length is the primary design target

2. No Tube in Window (NTIW) Baffles

NTIW baffles are a refined variant of segmental baffles where the window zone (the cut segment area) contains no tube holes — all tubes run only through the solid disc region. This design eliminates the high-velocity cross-flow component that occurs as fluid passes through the tube-populated window in a standard segmental baffle, which is the primary driver of flow-induced tube vibration.

By removing tubes from the window, NTIW baffles increase the unsupported tube span in the window zone but eliminate the worst vibration excitation mechanism — cross-flow over mid-span tubes. Vibration analysis per TEMA Appendix N or ASME Section III typically requires NTIW configuration when the reduced velocity (V_r) in the window exceeds 0.5 for thin-walled tubes.

Applicable Scenarios

• High shell-side flow velocity systems where regular segmental baffles would cause flow-induced vibration (FIV)
• Service for two-phase flow (vapor-liquid) and gas-liquid mixed shell-side
• Heat exchangers with tubes that have an OD/t ratio of more than 20 (thin-walled tubes that are likely to vibrate)
• Condensers for steam at high pressure and high temperature, as well as overhead condensers
• Equipment that is vibrating and causing tube failure that needs to be redesigned

3. Helical (Spiral) Baffles

Helical baffles are made of a series of quarter-circle or continuous spiral plates placed at a helix angle to the heat exchanger axis. They direct the shell-side fluid in a smooth helical path instead of the back-and-forth cross flow used by segmental baffles. This helical flow creates centrifugal force that improves fluid mixing and reduces fouling buildup on tube surfaces.

Compared with a single segmental design optimized for the same heat duty, helical baffles typically achieve: pressure drop reduction of 30%–50%, fouling rate reduction of 20%–40% in viscous service, and elimination of stagnant zones behind baffle support points. The trade-off is higher manufacturing complexity and cost, and reduced effectiveness in low-viscosity gas-side applications.

Applicable Scenarios

• Low shell-side pressure drop requirement systems (vacuum condensers, low-head pump applications)
• High viscosity shell-side fluids: heavy crude, polymers, glycols, bitumen
• Fouling service where minimizing stagnant zones reduces cleaning frequency
• Energy efficiency retrofits of existing heat exchange trains
• Cryogenic LNG heat exchangers requiring uniform helical flow distribution

4. Full Support Baffles, Orifice Baffles & Rod Baffles

We also fabricate full support baffles (impingement plates, support plates with no window cut, used purely for tube structural support), orifice baffles (with annular orifice gaps between tube OD and baffle hole for controlled leakage flow), and rod baffles (grids of rods replacing solid plates, eliminating vibration entirely in gas-side service). All configurations are produced to client-supplied drawings and technical datasheets.

Baffle Type Comparison Table — Engineering Selection Guide

Composite Cladded Baffle Plates — Extreme Condition Solutions

For highly corrosive media, high-temperature high-pressure service and applications where solid exotic alloy plates would be cost-prohibitive, Jiangsu Liangyi specializes in the fabrication of composite (bimetal) baffle plates. These combine the structural strength of a carbon or alloy steel base layer with the corrosion resistance of a metallurgically bonded cladding layer, reducing material cost by 40–70% compared to solid exotic alloy construction while delivering equivalent corrosion performance.

Composite Baffle Plate Manufacturing Methods

• Explosion Bonded (Clad) Baffle Plates: An explosive charge is set off above the cladding material, which then hits the base plate at hyper-velocity, creating a wavy metallurgical bond interface. Bond shear strength typically exceeds 140 MPa (vs. 70 MPa minimum per ASTM A264). The process produces zero heat-affected zone, preserving the corrosion properties of the cladding layer. Jiangsu Liangyi uses explosion cladded bimetal plate sourced from qualified explosion welding specialists and performs all subsequent forging, heat treatment and precision machining in-house. Suitable for Titanium Gr.1/Gr.2, Inconel 625, Hastelloy C276, 316L/317L, 2205 and 2507 cladding on carbon or low alloy steel base.
• Roll Cladded Baffle Plates: Base and cladding materials are bonded together by high-temperature co-rolling through solid-state diffusion.Roll cladding provides more consistent cladding thickness (typical tolerance ±10% of the nominal thickness) than explosion welding, and is preferred for large-area plates where using explosives is not practical.Standard cladding thickness range: 1.5 mm – 10 mm.Meets ASTM A263 (stainless steel clad), A264 (nickel alloy clad), and A265 (titanium clad).Standard cladding thickness range: 1.5 mm – 10 mm. Compliant with ASTM A263 (stainless steel clad), A264 (nickel alloy clad), A265 (titanium clad).
• Overlay Weld Deposited Baffle Plates: Corrosion resistant alloy (CRA) weld overlay is deposited on carbon steel base by automated GTAW/GMAW/SAW processes. Minimum nominal overlay thickness: 3 mm; minimum finished (post-machined) overlay thickness: 1.5 mm per ASME Section IX. PMI (positive material identification) performed on 100% of overlay surfaces. Used where complex geometry, nozzle weld-outs or local protection is needed that cannot be achieved with flat clad plate.

Composite Baffle Plate Technical Parameters

All composite baffle plates undergo 100% ultrasonic bond interface testing per ASTM A578 before any machining begins. Plates with any delamination indication exceeding the acceptance criteria are rejected and not processed further.

TEMA Standard Requirements for Baffle Plates — R, B & C Class Explained

TEMA (Tubular Exchanger Manufacturers Association) defines three classes of heat exchanger construction, each with distinct baffle plate fabrication tolerances. Understanding the class differences helps procurement engineers specify the correct quality level for their application. Jiangsu Liangyi fabricates baffle plates to all three TEMA classes as specified in client datasheets.

Why Choose Jiangsu Liangyi Over European & American Suppliers

Many global engineering contractors and equipment manufacturers maintain a short list of baffle plate suppliers across both Western and Asian sources. The decision between a Chinese manufacturer like Jiangsu Liangyi and a European or American fabricator is typically driven by a combination of technical capability, certification, cost and logistics. The table below provides a transparent, factual comparison to assist in that evaluation.

Jiangsu Liangyi is a direct manufacturer — there are no trading company intermediaries involved in any order. Clients deal directly with engineering and production personnel, reducing both cost and communication delays. For clients in the EU and North America, our products clear customs under HS Code 8404.90 / 7326.90 and are accompanied by full export documentation including commercial invoice, packing list, certificate of origin (CO/Form A/EUR.1) and health/fumigation certificate for wooden packaging.

Advanced Full-Cycle Manufacturing & Precision Machining Process

Jiangsu Liangyi provides a full range of services for baffle plates entirely within our Jiangyin factory — from raw material smelting to finished product export packaging. This integrated approach deletes subcontracting risk and gives us direct control over quality at every production stage.

1. Raw Material Smelting & Incoming Inspection: All steel is independently smelted in our 30t EAF with LF ladle refining and VOD vacuum degassing. Every heat undergoes direct-reading spectrometer chemical analysis, mechanical property testing (tensile, yield, impact) and ultrasonic flaw detection before any material is released to production. Heat traceability is maintained from melt to finished product.
2. Open Die Forging: Plate blanks are forged on our 2000T–6300T hydraulic presses with a minimum forging ratio of ≥3:1. Forging refines the internal grain structure, closes micro-porosity and eliminates the chemical segregation inherent in as-cast plate. The result is a forged plate with significantly better mechanical property uniformity in through-thickness direction compared to hot-rolled plate — critical for deep-drilled baffle applications.
3. Heat Treatment: Post-forging heat treatment (normalizing, quenching and tempering, or solution annealing for austenitic grades) is done in fully programmable heat treatment furnaces that automatically record the time and temperature. Every batch gets thermocouple calibration records and heat treatment records (HTR), which are all included in the final documentation package.
4. CNC Precision Machining: CNC drilling centers machine all tube holes, tie-rod holes, pass-partition grooves and peripheral OD/ID features strictly per client DXF/DWG drawings. Hole positioning tolerance is held to ±0.1 mm on pitch (TEMA R class), with hole diameter tolerance to H7/H8 class or per TEMA specification. Surface roughness on seating faces is machined to Ra 3.2 as standard, Ra 1.6 or Ra 0.8 available on specification.
5. Surface Treatment & Anti-Corrosion: According to the client's instructions, carbon steel baffles are shot-blasted to Sa 2.5 and then painted with zinc-rich primer or epoxy paint. We pickle and passivate stainless and duplex baffles. Before packing, all baffles are covered with VCI (Volatile Corrosion Inhibitor) film and oil that stops rust from forming. This keeps them from corroding while they are on the sea.
6. Final Inspection, Documentation & Export Packing: Before shipping, our QC team checks the dimensions (hole position, diameter, flatness, outer diameter), hardness, and appearance of all finished baffles using CMM, UT/PT/MT, and visual inspection. We give you all the paperwork you need, such as MTC (EN 10204 3.1 or 3.2), NDT reports, dimensional test reports, heat treatment records, surface treatment records, and packing lists.Parts are packed in wooden crates that have been fumigated and strapped with steel. These crates are good for both FCL and LCL sea freight and have all the markings required by the client and ISPM-15 phytosanitary standards.

Core Machining Capability Parameters

Material Grades for Baffle Plates — Full Grade List

Jiangsu Liangyi supplies baffle plates across a complete range of ferrous and non-ferrous alloy grades. All materials are sourced from traceable heats with full chemical and mechanical certification, and PMI (Positive Material Identification) is available for all exotic alloy grades.

• Carbon Steel: A105, A266 CL2/CL4, A36, SS440, A516 Gr60/70, S355J2, P265GH, C45
• Low Temperature Carbon Steel: A350 LF2 CL1/CL2, A350 LF3, P355NL1/NL2
• High Yield Strength Carbon Steel: A694 F52/F60/F65/F70
• Austenitic Stainless Steel: A182 F304/L, F304H, F310, F316/L, F317/L, F321/H, F347/H, F44 (6Mo), 310S, 904L, 254SMO
• Chrome-Molybdenum Low Alloy Steel: A182 F1, F5, F9, F11, F12, F22, F23, F91, F92, 42CrMo4 (4140), 34CrNiMo6
• Duplex & Super Duplex Stainless Steel: A182 F51 (2205), F53 (2507), F60, S31803, S32750, S32760
• Nickel-Based Alloys & Superalloys: Alloy 20 (N08020), Monel 400 (N04400), Hastelloy C276 (N10276), C22 (N06022), B2 (N10665), Inconel 600 (N06600), 625 (N06625), 718 (N07718), X750 (N07750), Incoloy 800 (N08800), 800H/800HT, 825 (N08825), Nickel 200/201 (N02200/N02201)
• Titanium Alloys: Grade 1, Grade 2 (commercially pure), Grade 5 (Ti-6Al-4V), Grade 7 (Ti-0.2Pd) for composite cladding applications

All mill test certificates are issued to EN 10204 3.1 (manufacturer's inspection) or 3.2 (independent third-party inspection) as specified. PMI by handheld XRF analyzer is performed on 100% of exotic alloy plates and available as a documented report in the final MTC package.

Strict Quality Control & Full Testing System

Every batch of baffle plates produced at Jiangsu Liangyi passes through a mandatory multi-stage quality control program before delivery. Our in-house laboratory and inspection department is equipped with advanced testing instruments calibrated to national and international standards, and staffed by Level II/III certified NDT inspectors.

1. Raw Material & Mechanical Property Testing

• Chemical composition analysis by direct-reading optical emission spectrometer (OES), traceable to reference standards
• Universal tensile testing: yield strength (Rp0.2), ultimate tensile strength (Rm) and elongation (A%) per ASTM A370 / EN ISO 6892-1
• Brinell (HBW) and Rockwell (HRC/HRB) hardness testing, minimum 3 points per piece
• Charpy V-notch low temperature impact test at -20°C / -40°C / -46°C or as specified, per ASTM A370 / EN ISO 148-1
• Metallographic microstructure analysis (grain size, phase identification) for important alloy grades
• Intergranular corrosion (IGC) test per ASTM A262 Practice E for austenitic stainless grades
• Clad layer shear bond strength test per ASTM A264 / A265 for composite baffle plates

2. Non-Destructive Testing (NDT)

• Ultrasonic testing (UT) per ASTM A388 (forgings) / ASTM A578 (clad plates) / EN 10228-3, Level II certified operators
• Liquid penetrant testing (PT) per ASTM E165 / EN 571-1 for surface-breaking defect detection
• Magnetic particle testing (MT) per ASTM E709 / EN 10228-1 for ferromagnetic materials
• Positive material identification (PMI) by handheld XRF on all exotic alloy grades

3. Dimensional & Precision Inspection

• Full CMM (coordinate measuring machine) dimensional inspection: tube hole positions, pitch, diameter, OD/ID, thickness, groove dimensions
• Hole position, diameter and pitch tolerance inspection with calibrated gauge pins, digital calipers and micrometers
• Flatness, parallelism, perpendicularity and coaxiality geometric tolerance inspection
• Surface roughness measurement by profilometer (Ra, Rz)
• Pass-partition groove depth and width verification

Industry Standards & Compliance

All baffle plates manufactured at Jiangsu Liangyi are produced and tested in strict accordance with the following international standards. Compliance documentation is issued as part of the standard delivery package.

• TEMA Standard: Tubular Exchanger Manufacturers Association — Class R, B and C baffle plate fabrication tolerances
• ASME Standards: ASME Section VIII Div.1 & Div.2 (pressure vessel), ASME Section IX (welding qualification for overlay), ASME B16.5/B16.47 (flange dimensions reference)
• ASTM Standards: A105, A182, A266, A516, A350, A694, A263, A264, A265, A370, A388, A578 and related material and testing standards
• EN / DIN European Standards: EN 10204 (material certificates), EN 10228 (forging inspection), EN 13445 (pressure vessel), EN ISO 6892, EN ISO 148
• API 6A Technical Specification: Products can be supplied to API 6A dimensional and material requirements for oil & gas wellhead applications. Note: Jiangsu Liangyi does not hold an API monogram licence; if the API monogram is required on the final equipment, this is applied by the equipment manufacturer (our client).
• JIS Japanese Industrial Standards: JIS G3101, JIS G4051, JIS B 8249 as specified
• ISO 9001:2015: Quality management system — third-party certified by accredited certification body
• NACE MR0175 / ISO 15156: Sour service (H₂S) material hardness and composition requirements — our materials are selected and tested to comply with NACE MR0175 / ISO 15156; material compliance statements are issued on request
• PED 2014/68/EU: European Pressure Equipment Directive — Jiangsu Liangyi supplies baffle plates as pressure equipment components that meet PED technical requirements. Under PED Article 4, responsibility for CE marking rests with the equipment manufacturer (our client), who applies the CE mark through their Notified Body after full assembly qualification.

Global Applications & Anonymized Project References

Jiangsu Liangyi has provided custom baffle plates for more than 200 customers of the petrochemical, oil and gas, power generation, HVAC, marine, and pharmaceutical industries in more than 50 countries. The following project references, which have been anonymized, show the wide range of technical and application needs we meet on a regular basis.

Full project reference lists by industry and country are available on request. View our project reference page or contact our sales team for industry-specific references relevant to your application.

Why Choose Our China-Made Baffle Plates From Jiangyin, Jiangsu

As a top Chinese manufacturer of baffle plates, we have over 25 years of export experience of forgings. We have built a complete industrial chain at our 80,000 ㎡ Jiangyin factory, covering independent steel melting, forging, heat treatment, CNC machining, and final inspection. We provide global customers with one-stop custom baffle plate solutions. Our main strengths include:

• Full-Cycle In-House Production: We control the whole production process from raw material to finished product, with 2000T–6300T hydraulic forging presses, 5M seamless rolling machine, 10+ heat treatment furnaces and complete CNC machining equipment. More details on our Equipment page.
• Ultra-High Precision Machining Capacity: Hole positioning precision to ±0.1 mm (TEMA R), hole diameter tolerance to H7/H8 class, flatness ≤0.5 mm/m, surface roughness to Ra 0.8 — fully meeting the precision requirements of high-end heat exchange equipment.
• Complete Material Grade System: Carbon steel through nickel superalloys, all with full traceability and EN 10204 3.1/3.2 mill test certificates. View the full material list on our Materials page.
• Strict Quality Control System: There are 8 mandatory QC hold points, from the raw materials coming in to the final export packing. Level II/III certified NDT inspectors and calibrated inspection equipment are used.
• Global Export Service Capability: We send baffle plates to over 50 countries with all the necessary export documents, such as a commercial invoice, packing list, CO, EUR.1, EN 10204 MTC, NDT reports, and a fumigation certificate.Third-party inspection by SGS, BV, DNV, Lloyd's and TÜV is also available per request.
• Competitive Factory Direct Price: Direct pricing from the manufacturer, with no markup from the trading company. Clients consistently say that they save a lot of money compared to similar supplies from Europe or the US, without losing any technical compliance or certification depth. Actual savings depend on the material, specification, and order volume. Please ask for a parallel quote that fits your needs.

Besides baffle plates, we also custom fabricate heat exchanger tube sheets, forged flanges, seamless rolled rings and other industrial forged parts. We provide a full range of  procurement solutions for complete heat exchanger projects.

Export Packaging, Shipping & Trade Documentation

Jiangsu Liangyi has been exporting industrial parts since 1998. Our logistics and documentation process is designed to make sure that baffle plates arrive at destination in perfect condition and clear customs without delay. The following information covers our standard export service for international buyers.

Frequently Asked Questions About Baffle Plates

Get a Custom Baffle Plates Quotation From China's Leading Manufacturer

Jiangsu Liangyi is a professional manufacturer and supplier of baffle plates located in Jiangyin, Jiangsu, China. We are ready to provide high-quality custom baffle plates to customers around the world with  competitive prices, short lead times, full technical documentation, and reliable after-sales support. Our engineering and production teams are ready to help you with your project from RFQ to delivery, whether you need standard segmental baffles, NTIW baffles for applications that are sensitive to vibration, helical baffles for systems with low pressure drop, composite explosion-bonded baffle plates for environments that are very corrosive, or any other custom design.

To get a detailed quotation, please send us your custom drawings (DXF, DWG, PDF or STEP), material specification, needed standards, order quantity and project schedule. Our sales and engineering team will review your requirements and respond within 24 hours.