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Blasch’s shape making capability allows us to engineer round and hex ferrules to meet your boiler specifications and application. Ferrules can be made in a variety of high purity thermal shock resistant ceramic materials, such as 99% alumina, as well as metallic alloys.
You can expect extended life from our ferrules in environments such as oxygen-enriched, acidic, reforming applications that are under the presence of hydrogen (reducing) as well as fluidized catalyst coolers that see severe abrasion. In addition, several long term advantages over traditional INCOLOY ferrules and castable installations include absolute resistance to metal dusting and carbon monoxide corrosion. Typically used in conjunction with a monolith refractory, features like precise flanges, thin walls, flared inlets/outlets and cast in anchor grooves allow for ease of installation and reduced pressure drop, while increasing the reliability of your boiler.
Designed for use in a variety of chemical and industrial applications where it is necessary to protect tube sheets, welds, and vulnerable boiler tubes, Blasch ferrules come fully wrapped with thermal paper and arrive ready to install. Installation is as simple as taking the ferrules out of the box and slipping them into the boiler tubes. No castable refractory is used between the Blasch ferrules and only the most minimal amount is required around the periphery. Operators can save days on turnaround without the need to painstakingly install, and then cure out large expanses of castable refractory.
The majority of boiler tube failures occur at the inlet or first few inches of the tubesheet, weld area, and inside the boiler tubes. In lower temperature units (<1,650°F) a typical solution is to employ a thin-walled metallic insert. Often sacrificial, the metallic insert can be flared to match the ID of the boiler tube to provide an area for process gases and fluids to enter the heat exchanger without any significant pressure drop. In elevated temperatures, these metallic insets can be wrapped with insulating paper to further protect the boiler from corrosion and fatigue effects due to temperature. It is far cheaper and easier to replace these inserts periodically than to replace the boiler tube itself. The metallic insert can also have features in them to facilitate a refractory face or positive stop for location purposes when the temperatures exceed 1,650°F. The use of a separate ceramic head is commonly used in higher temp applications. In applications that exceed 2,300°F or the limitations of metals, an all-ceramic design, such as the Blasch ProLok is recommended.
Click here to learn about our ProLok Two Piece Ceramic Ferrules.
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