Project Description

Cold shoe

Cryogenic Pipe Supports

Dannenbaum LLC are suppliers of Cryogenic Pipe Supports in three main categories:

1) 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 enquiries in connection with the supporting of Cryogenic piping and our experienced engineers can offer guidance as to the benefits of all three systems.

Dannenbaum LLC are suppliers of Cold Insulated Pipe Supports consisting of a steel cradle containing High Density Polyurethane Foam inserts “Thermafoam” 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. HD PUF monolithically molded, or cut from bun stock, segments either single or multilayer. ii) Aluminum foil vapor barrier to prevent ingress of moisture. iii) Aluminized metal thin gauge protective jacket, to prevent damage to the vapor barrier. iv) Mechanically strong carbon steel support cradle which contains the insulation element and allows pipe loading to be transferred safely to supporting structures. (see page 146 for typical details) The two essential design parameters for Cryogenic Pipe Supports are compressive strength and thermal conductivity, Polyurethane Foam has superior insulation properties to prevent heat loss and maintain temperatures in cold process pipelines to prevent freezing. Polyurethane Foams can be efficient over an extremely wide range of temperatures typically -196ºC to +120ºC. The density of the foam which determines the compressive strength is generally between 160 kg/m3 and 320 kg/m3 and with these load bearing properties it is evident why PUF is such a suitable insulation material for Cryogenic Support Applications. Polyurethane Foam is produced by mixing two liquids along with a blowing agent and Carpenter & Paterson using the latest in molding machine technology utilize 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. With the manufacture of the steelwork and the PUF insulation undertaken side by side in our works, we ensure complete control of production progress throughout.

Our Engineering Department is staffed by experienced designers who are able to give practical advice and assistance in the design of Cryogenic Pipe Supports. Our Engineers upon receipt of all relevant information can calculate and design the cryogenic supports needed for each project from simple shoes to complex anchors. Fully dimensioned detail drawings for each individual support are produced for customer approval before manufacture commences. The molding tools are designed on a project specific basis and they can be produced in pipe sizes ranging up to 900NB and above with insulation thickness of up to 250mm. Independent testing is carried out to determine the thermal conductivity, the density and compressive strength of the HD PUF materials. Our testing, calculation and design criteria are all based on: i) Shell DEP No 30.46.00.31 – Gen document ii) ASTM D-1621: Compressive strengths of HD PUF iii) ASTM C-177: Thermal conductivity testing Our Quality Systems are regularly audited by third parties and have been fully endorsed by achieving certification in accordance with BS EN ISO 9001.