Designing Cryogenic Pipe Supports

Heat continues to enter the pipe through insulation and supporting members. This heat causes the contents of the liquid to boil. Because of this, there should be a heat leak minimization. The thermal efficiency of the pipeline should be carefully considered given as it impairs heat input to the system which usually leads to product loss. So it must be necessary to fully understand the cryogenic piping system.

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Materials used in ultra-low temperature piping systems require the consideration of materials that have the appropriate mechanical and physical characteristics. Process fluids, manufacturability, cost, and regulatory compliance of standards such as: As ASMEB 31.3. Certain materials have a tendency to be brittle with the possibility of failure that does not normally occur at low temperatures. Hence, it is necessary to use ferroalloys.

The most commonly encountered iron alloys in cryogenic piping applications are usually classified as ferritic or austenitic. Most austenitic alloy steels are used at low temperatures. The piping is often AISI 300 type chrome nickel stainless steel, or stainless 304, 304L, 316 and 316L. Of the 300 series stainless alloys, the composition of 304 is the most common.

Most pipe for cryogenic liquid services is insulated. The line is not insulated usally because of: (1) its use is very rare and quick. (2) That it is a temporary installation; or (3) cold loss is not important.

The types of insulation used for cryogenic piping include (1) foam such as polyurethane; (2) Powder insulation materials such as pearlite; or (3) Vacuum insulation piping. To keep the insulation system effective moisture proofing of the system must be implemented to prevent the ingress of moisture from the air freezing against the pipe and cryogenic lines. When this happens, the ice that forms deteriorates or destroys the insulation system.

The cryogenic liquid has the boiling point of oxygen (-297 or -) Oxygen from the air can condense and accumulate in the insulation space. In this situation, the insulation system should not be flammable because of the presence of solid oxygen.

If cold insulation is required, the entire system should be completely insulated. All plumbing components, tubes / hoses from the insulation equipment, drains, nozzles and supporting members as well as the protruding metal parts.

The name of a cryogenic pipe support block can vary depending on its material, purpose, and specific design. Based on the information in the reference article, the following names and descriptions related to cryogenic pipe support blocks can be summarized:

Insulated wood pipe support

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Example: Type A12 insulated wood pipe support cryogenic pipe support block.
Material: Usually made of high-quality wood such as red pine, which has good cold insulation performance.
Uses: It is used for the support of low-temperature pipelines such as thermal pipelines, LNG pipelines, and soda pipelines.
Operating temperature range: -196°C to 120°C.
Specifications: According to the outer diameter and needs of the pipe, there are different specifications and models, such as DN20-DNmm.

Chemical pipeline impregnated red pine wood cold wood block

Material: High-quality red pine wood with special treatment, which has been soaked in oil to reduce temperature conduction.
Features: The product specifications are complete and can be customized according to needs, which ensures the safety and stability of pipeline operation.
Energy-saving and environmental protection anti-corrosion red pine support block:
Material: red pine.
Features: It has the functions of energy saving, environmental protection and anti-corrosion, and is suitable for low-temperature piping system.

Cold insulation tube bracket

Form: According to the axial displacement and stress caused by the cold shrinkage of the cryogenic pipe, the design of the cold pipe holder needs to consider the compensation measures and correct installation.
Cold insulation material: red pine wood is used as the main raw material, and imported red pine wood, asphalt impregnated hardwood and other materials can also be used, and the outer surface is usually treated with anticorrosive asphalt paint and waterproofing.
In summary, low-temperature pipe support blocks are often referred to as insulated wood pipe supports, chemical pipeline oil-impregnated red pine cold insulation wood blocks, energy-saving and environmentally friendly anticorrosive red pine support blocks or cold insulation pipe supports, etc. These support blocks are designed and selected with the special needs of low temperature environments in mind to ensure the safe and stable operation of the piping system.

If you are looking for more details, kindly visit cryogenic pipe supports manufacturer.