Housed Expansion Joints
Expansion Compensators and Housed Expansion Joints are essentially a bellows that is protected by and guided within a pipe housing.
While the industry offers two styles, one of which is referred to as “internally” and the other “externally pressurized”, they both serve the same function but we prefer the “externally pressurized” for improved bellows stability. They are furnished with a fixed ASA-150 Drilling Raised Face Carbon Steel Flange on the one end and a Floating Flange on the other. The alternates are Carbon Steel Threaded Nipples, Weld or Grooved Ends or Copper Female Sweat Ends as needed. These products are typically supplied in 304 stainless steel.
There are three movement choices: 2” (50mm) compression and 1/2” (13mm) extension, 4” (100mm) compression and 3/4” (19mm) extension or 8” (200mm) compression and 11/2” (38mm) extension. They are all designed for systems that will run hot and the slight extension is only there for those occasions when ambient temperatures are fairly high during installation, and the installation drops to some very low temperatures before they are put into hot water or steam service.
HEJFFL – Housed Expansion Joint with Fixed and Floating Flanges
Our Housed Expansion Joints can be supplied with carbon steel plate floating and fixed raised face flanges. The typical flange drilling is ASA-150, however alternative flange drillings are available on request. Pipe sizes from 2” (50mm) to 14” (350mm) are available in the product range.
HEJW – Housed Expansion Joint with Weld Ends
Our Housed Expansion Joints can also be supplied with bevelled weld end one side and fixed end at the other. Pipe sizes from 2” (50mm) to 14” (350mm) are available in the product range.
If you would like to order or learn more about these products, please contact Mason UK’s friendly team of engineers.
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