Design Considerations when Selecting Materials
In the construction and industrial sectors, pipe support fabrication plays a crucial role in maintaining the stability and integrity of piping systems.
These supports are responsible for holding and guiding pipes, ensuring proper alignment, and absorbing dynamic forces. Because of this, the choice of materials used in pipe support fabrication is a critical decision that influences the overall performance and durability of the support system.
Several design parameters and deciding factors need to be considered when selecting materials for pipe support fabrication. These are seven of the key considerations to aid in making informed decisions:
1. Load Capacity & Strength Requirements
One of the primary factors in material selection for pipe support fabrication is the load-carrying capacity. Pipe supports should be capable of withstanding the weight of the pipes, along with any additional loads such as fluid pressure, thermal expansion, seismic forces, and wind loads.
The chosen material must possess sufficient strength and stiffness to support these loads without deformation or failure. Various grades of carbon and stainless steels as well as plastic composites are commonly used due to their high load capacity.
2. Corrosion Resistance
In many environments, piping is exposed to corrosive substances or harsh atmospheric conditions, as well as long service intervals in remote areas. Corrosion can significantly affect the structural integrity and lifespan of both the pipe and its supports. It is crucial to consider the corrosive nature of the environment and chemicals used onsite when selecting materials with adequate corrosion resistance. Stainless or galvanised steel and composite materials are frequently employed to mitigate the effects of corrosion.
Service Temperature
Piping systems often encounter temperature variations, which can cause thermal expansion and contraction. Pipe supports must accommodate these dimensional changes without causing excessive stress or deformation to piping and fixtures. Materials with low coefficients of thermal expansion, such as carbon steel and stainless steel, are commonly chosen to ensure compatibility with the pipe material and to minimise the risk of joint failures due to the thermal expansion of the liquids they carry.
4. Insulation & Heat Dissipation
Certain applications require pipe support fabrication to accommodate thermal insulation or heat dissipation properties. Insulated pipe supports are essential for maintaining temperature control, preventing heat loss or gain, and reducing condensation. Materials with low thermal conductivity, such as fibreglass-reinforced plastic (FRP) or insulating polymers, are often used to minimise heat transfer. Conversely, materials with good heat dissipation, like aluminium or certain alloys, are employed when the dissipation of heat is necessary.
5. Thermal Movement
When thermal movement of piping is expected, it is critical to allow for some movement of piping within the system. Incorporation of a sliding mechanism or clearance is often imperative to allow the system the necessary flexibility. Common substrates are PTFE, UHMWPE or Tufnol, which can be employed directly under the pipe, or incorporated into a sliding shoe assembly.
For pipes that are suspended and/or subject to vertical movement, spring supports may be required. Failure to properly allow for thermal movement during pipe support fabrication will increase the risk of catastrophic failure of valves, welds, flanges or other components of the system.
6. Environmental Considerations
Environmental factors, such as exposure to UV radiation, moisture, chemicals, and fire hazards, should be evaluated when selecting materials for pipe supports. This is, of course, dependent on the project, application and other environmental factors. UV-stabilised materials, such as certain plastics and coatings, can prevent degradation caused by prolonged exposure to sunlight. Flame-retardant materials, such as fire-resistant coatings or intumescent paints, can enhance the fire resilience of pipe support fabrication. Similarly, materials resistant to moisture or chemicals are chosen based on the specific requirements of the application.
7. Cost & Availability
Environmental factors, such as exposure to UV radiation, moisture, chemicals, and fire hazards, should be evaluated when selecting materials for pipe supports. This is, of course, dependent on the project, application and other environmental factors. UV-stabilised materials, such as certain plastics and coatings, can prevent degradation caused by prolonged exposure to sunlight. Flame-retardant materials, such as fire-resistant coatings or intumescent paints, can enhance the fire resilience of pipe support fabrication. Similarly, materials resistant to moisture or chemicals are chosen based on the specific requirements of the application.
Selecting the appropriate materials for pipe support fabrication requires a thorough understanding of the design parameters and deciding factors involved in your project. Load capacity, corrosion resistance, temperature compatibility, insulation requirements, environmental considerations, and cost all play vital roles in determining the most suitable material for the job. By considering these factors, engineers and designers can ensure the longevity, safety, and reliability of pipe support systems, contributing to the overall efficiency and integrity of piping installations in various industries.
Talk to an Anchorage staff member today for advice on the best materials to be using for your pipe support fabrication.
