Tube patterns describe how the tube holes are distributed through a tube sheet. Manipulating tube patterns helps increase flow but these modifications can create challenges for tube expansion.
Dunn Heat Exchanger, Inc., a fabrication company located in Texas City, Texas, offers heat exchanger cleaning, decontamination, repair, and fabrication services in the highly competitive shell and tube market.
To get the best performance out of a vessel it’s important that it maintains necessary operating capacity. While there are several preventative maintenance procedures that can prolong the life of the vessel, eventually a decision on retubing or replacing the unit will need to be made.
When it comes to removing tubes, there are many different options to choose from. Hydraulic or automated pulling options can be a great way to speed up the job, reduce tube sheet damage, and improve operator ergonomics. However, before selecting a pulling package, it’s important to consider the vessel type, tube condition, and space constraints
In recent years, the use of exotic materials in heat exchanger tubing has become a lot more common. While these materials are great for working in tough conditions, they can have be very challenging to work with as they often require more tooling and job time. This is especially true in tube removal where pulling spears are used. Tapping spears have become an effective way to overcome many of these issues.
Training programs can benefit to all organizations, especially, those in competitive markets. From improving operator retention, boosting productivity, and cutting job costs, training is a great investment to ensure your staff is up to date on all the latest industry practices.
Welding has become fairly common practice in pressure vessel fabrication and maintenance. From tube ends to plugs, welding can provide additional strength or sealing coverage if done correctly. When it comes to tube plugging, many customers are facing questions about plug materials and special requirements to ensure vessel specifications are met. In this article we will discuss the changes to the ASME code, material types and nomenclature, and impacts to the welding process.
Plugging tubes are one of the most convenient ways to repair shell-and-tube types of heat exchangers. It can be an effective and reliable method to fix a heat exchanger when done properly. However, it could cause more harm than good if not executed carefully.
Standards and processes are at the core of every business. From internal operating procedures to federal regulations, there are many different types of standards a company must follow in order to be successful. Therefore, it’s important to know how to identify what standards impact your business and how to adopt them.
Similar to a shell and tube heat exchanger, air coolers are made up of stacked finned tubes with header or water boxes on either end of the vessel. While air cooler maintenance can be challenging, there are a few tips and tricks that can help make the process easier.
