Tube sheets and headers are critical components in tail gas heaters that distribute and collect process fluids through tube bundles for efficient heat transfer.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Tube Pattern | Triangular (30°), Rotated Triangular (60°), Square (90°), Rotated Square (45°) | Triangular patterns maximize heat transfer but are harder to clean; square patterns allow mechanical cleaning.TEMA |
| Header Design | Bonnet, Channel, Removable Cover, Integral | Selection depends on maintenance access and pressure rating.TEMA |
| Tube Pitch Ratio | 1.25–1.5 times tube OD | Lower ratio increases heat transfer but may cause fouling; higher ratio allows cleaning.TEMA |
| Temperature Range | -20 to 650 °C | Above 650°C, creep and oxidation become significant; below -20°C, impact testing required.ASME BPVC Section VIII Div.1 |
| Operating Pressure | 10–150 bar | Above 150 bar, thicker sheets and special joint designs required.ASME BPVC Section VIII Div.1 |
| Tube to Sheet Joint | Expanded, Welded, Expanded and Welded, Strength Welded | Expanded joints for low pressure; welded for high pressure and leak tightness.ASME BPVC Section VIII Div.1 |
| Tube Sheet Thickness | 25–150 mm | Thickness depends on pressure, diameter, and material; thicker for high pressure.TEMA |
| Material of Construction | ASTM A516 Gr.70, 304/316L, 2205, Inconel 625, Titanium Grade 2 | Selection based on corrosion resistance and temperature.ASTM |
| Corrosion Allowance | 1.5–6 mm | Additional thickness to account for corrosion over design life.ASME BPVC Section VIII Div.1 |
| Surface Finish | Ra 0.8–3.2 µm | Smoother finish for clean services; rougher for fouling services.ASME B46.1 |
| Design Life | 20–30 years | Typical for chemical plant equipment. |
| Temperature | -20 to 650 °C | Outside this window: Above 650°C: creep and oxidation; below -20°C: brittle fracture. |
| Pressure | 10–150 bar | Outside this window: Above 150 bar: risk of leakage and structural failure; below 10 bar: may not be economical. |
| Corrosive environment | pH 3–12, chloride < 1000 ppm for 316L | Outside this window: Outside range: pitting, stress corrosion cracking. |
| Thermal cycling | ΔT < 100 °C per hour | Outside this window: Rapid cycling: thermal fatigue and joint failure. |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
A heat exchanger that recovers thermal energy from nitric acid plant tail gases to improve system efficiency.
The tube bundle or plate pack is the primary heat exchange element within a Tail Gas Heater, a component used in chemical manufacturing processes.
A practical evidence checklist for RFQ preparation and supplier evaluation.
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Manufacturer profiles associated with Tube Sheets / Headers.
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Tube sheets are structural plates that hold and seal tubes, while headers are distribution/collection chambers that manage fluid flow to/from multiple tubes.
Tube sheets must withstand differential pressure between shell and tube sides, prevent vibration-induced fatigue, and maintain tube alignment under thermal cycling conditions.
Common methods include mechanical expansion (rolling), welding (seal welding or strength welding), or explosive bonding for dissimilar materials.
Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.