Header design
of air-cooled heat exchangers
| REMOVABLE COVER-PLATE HEADER | |
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This header design, with a fl anged cover plate, meets API 661 „removable cover-plate header“. Applicable range: up to 40 bar, > 40 bar special designs possible a) with through bolts (figure a) b) with stud bolts (figure b) |
| PLUG HEADER | |
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This header design, with a plug opposite each tube end, meets requirements for API 661. Application: Fluids under high pressure on the tube side (e.g. gases). If the plug has been removed, the tubes behind it can be cleaned, re-rolled or closed. Applicable range: up to 250 bar, special designs possible |
| BONNET HEADER, WELDED-ON (D Type) | |
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The bonnet header with a half pipe end construction. Application: With clean products on the inside of the tube and/or with a low leakage requirement. Applicable range: up to 25 bar, even at higher temperatures (around 250 °C), special designs of up to 100 bar possible |