Online Expansion Joints

expansion joints are provided in way of many applications and within many industries. The universal style joint consists of 2 bellows. Each is divided by a pipe. The intended purpose of the model is to accept mass amounts of deflection. This is relative to the amount of angulation which each bellow is able to absorb and the distance between each of the bellows. The amount of lateral deflection is increased or decreased by changing the length of the centralised spool. When a piping issue requires greater levels of capability, the overall length is increased in order to fit the situation. The expansion joint manufacturer clearly understands that customization is relative to the production standards of each of his unique clients. 

Extra information about expansion joints


Thermal Expansion

Deflections are generally the result of thermal expansion of the piping. The joints, in the preceding circumstance, are generally lengthy. The length, overall, does not change, when the pipe is heated. The standard units accept the expansion with regard to length when the temp rises to the temperature associated with the design.


One foremost example of a custom designed universal expansion joint is one created for an oil refinery. The bellow and liner are fabricated from stainless steel. The tie rods, cover, flanges, and pipe spool are each made of durable carbon steel. The approximate size of the model is eighteen inches in diameter and sixty and one-half inches long. Other size offerings are twenty eight inches in diameter x eighty and inches long, and thirty six inches in total diameter by forty inches long. The units, within this particular model, are designed with movement elements for fifty psig at 655 degrees Fahrenheit. Such movement indicators are capable of .675 inches compression, .375 inches lateral and one inch angular. The pipes and bellows, within the preceding example, were one-hundred percent X-rayed and hydro-tested to assure responsiveness.

Acid Plant


Another example of custom design work, as it pertains to expansion joints, is where the application is applied to an acid plant. In the preceding model, the custom design work consisted of two forty-two inch tied universal joints a forty-two inch hinged expansion joint, and a sixty-two inch fabric joint in duct work. The assembly provided the producer with flanged bellows. The bellows were fabricated from three-hundred four-H Stainless Steel. The remainder of the assembly was made of durable carbon steel, with an operating temperature of an impressive seven-hundred degree Fahrenheit at ten psig. The joints, naturally, were tested with regard to the dye and X-ray tested, prior to shipment to the producer.


The fabric pipe joint is generally used in ducts. The ducts, in this example, normally carry exceptionally hot gases at low levels of pressure. The primary design elements include temperature and flow rate of the gases. Additionally, abrasiveness is taken into consideration. The element of abrasion is associated with solids which are suspended within the gases. In respect to the following manufacturing process, layering of various fabrics, providing insulation is combined in order to accommodate the temperature and the pressure within the system. As far as maintenance objectives, the fabric belt requires replacement from time-to-time.


There are all types of joints, and finding one correct, as to application, is of no concern to a producer of various industrial solvents and gas-related products---as witnessed within the preceding three examples. Customisation is key when it comes to manufacture of expansion joint applications.