Cryogenic Shoe

A cryogenic shoe is pipe support known as a cold shoe. These pipe supports are used in applications of cryogenic service where the transfer of cold temps from the pipeline to the surrounding steel pipe rack is not desirable. These supports can be used for temperatures down to -300˚ Fahrenheit. Cryogenic pipe supports are necessary when producing, processing, transporting, and distributing liquefied gases such as Liquefied Natural Gas (LNG) or Liquefied Petroleum Gas (LPG) which can reach temperatures as low as -165°c.

The cryogenic shoe is manufactured as pre-insulated pipe support (also known as ‘cold shoes’) incorporating high-density polyurethane foam (HD PUF) as a highly effective load-bearing cryogenic insulation medium. A Cryogenic Shoe is a Pipe Support.

The cryogenic shoes are engineered to fulfill specific client requirements which may vary according to several factors, including load carrying capacity and installation restrictions. There are three different types of cryogenic shoes- 1) High-Density Polyurethane Foam (HD PUF)2) Glass Reinforced Polyester Composite3) Hardwood. Densified Wood Blocks. The most common cryogenic shoe is the polyurethane foam type known as a PUF. The foam is specifically formulated and molded-in single or multi-layer 180° segments with high-density skins. The design make-up of the insulated pipe support can be categorized as follows: I) ii) iii) iv) “HD PUF monolithically molded, or cut from bun stock, segments either single or multilayer. Aluminum foil vapor barrier to prevent ingress of moisture. Aluminized metal thin gauge protective jacket, to prevent damage to the vapor barrier. Mechanically strong carbon steel support cradle which contains the insulation element and allows pipe loading to be transferred safely to supporting structures. The cryogenic shoe is used spring hangers.

The cryogenic shoes, which are made of Polyurethane Foam are produced by mixing two liquids along with a blowing agent, and Carpenter & Paterson using the latest in molding machine technology utilizes CFC free-blowing agents in producing monolithically molded components with a very low isocyanate index. Steps are machined to ensure alignment with the parent pipe insulation system. Carpenter & Paterson USA is the place to go for help.

The high-density wood type of cryogenic shoes close-grained hardwood such as oak, iroko, or obeche are often used as load-bearing insulators on low-temperature services. The woods are kiln dried to ensure an acceptable moisture content and then machined in segments according to pipe diameters. An alternative to hardwood blocks is a unique material manufactured from selected beech veneers, which are impregnated under vacuum with thermosetting synthetic resin and then densified under heat and pressure. The main benefit of both the above products is their high compressive strengths coupled with their obvious machining versatility. There are numerous applications for both woodblock designs.

To conclude, our article on Cold Shoes and cryogenic shoes and High-Density Polyurethane Foam (HD PUF) 2) Glass Reinforced Polyester Composite 3) Hardwood. Densified Wood Blocks The selection of one of the above forms of Pipe Support is dependent on many factors, which include: load-carrying capacity, ease of installation, piping contractors’ requirements, etc. This section includes typical details of all three types of Cryogenic Supports, however, due to the numerous individual requirements in the marketplace, we welcome all inquiries in connection with the supporting of Cryogenic piping and our experienced engineers can offer guidance as to the benefits of all three systems. Contact us on the web Dannenbaum LLC