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Why is flex lancing preferred for U-tube heat exchanger bundles?
Flex lancing has become the preferred method for cleaning U-tube heat exchanger bundles due to its ability to navigate complex tube geometries while maintaining effective cleaning pressure. This specialised technique uses flexible high-pressure water jets...
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Why do some heat exchangers require cleaning every turnaround while others last years?
Heat exchangers require cleaning at dramatically different intervals due to a complex interplay of fouling mechanisms, operating conditions, and design factors. Some units need maintenance every turnaround (typically 12–24 months), while others operate efficiently for...
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How do you clean partially blocked heat exchanger tubes safely?
Cleaning partially blocked heat exchanger tubes safely requires a systematic approach that combines proper equipment, techniques, and safety protocols. The process involves using high-pressure water jetting at controlled pressures between 500 and 3000 bar (7,250...
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How do you clean heat exchanger tubes with tight bend radii?
Cleaning heat exchanger tubes with tight bend radii requires specialised flexible lance technology and high-pressure water jetting equipment designed to navigate complex tube geometries. Traditional rigid cleaning lances fail when encountering bends tighter than 3...
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When is chemical cleaning preferred over mechanical cleaning for heat exchangers?
Chemical cleaning becomes the preferred choice for heat exchangers when dealing with specific types of deposits that mechanical methods cannot effectively remove, particularly when fouling involves chemical bonds, microscopic penetration, or complex mineral scales. The...
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How do you clean shell side without damaging tube supports?
Shell-side cleaning of heat exchangers requires careful techniques to remove fouling without damaging delicate tube supports. The challenge lies in applying sufficient cleaning force to eliminate deposits while protecting the structural components that maintain tube...
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What water flow rates optimize cleaning in small diameter tubes?
Optimizing water flow rates in small-diameter tubes requires careful consideration of multiple variables to achieve effective industrial cleaning. The ideal flow rate typically ranges from 15 to 40 litres per minute for tubes between 10...
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What determines whether to clean heat exchangers online or offline?
The decision between online and offline heat exchanger cleaning depends on several critical factors, including operational requirements, safety considerations, fouling severity, and economic implications. Online cleaning allows continuous operation, while offline cleaning requires complete system...
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