Pipe support
The overall design configuration of a pipe support assembly is dependent on the loading and operating conditions.
The load due to vessel nozzle movement during operation is cyclic because the displacement is withdrawn during shut-down and resurfaces again after fresh start-up.
A pipe subjected to a cycle of hot and cold fluid similarly undergoes cyclic loads and deformation.
Selection of rod hanger depends on pipe size, load, temperature, insulation, assembly length etc.
3) Rigid strut: It is a dynamic component i.e. designed to withstand both tensile and compression load.
Selection depends on pipe size, load, temperature, insulation, assembly length.
A VES unit is fairly simple in construction with the pipe virtually suspended directly from a helical coil compression spring as the cut away sectional sketch shows below.
The main components being: Normally clients / engineering consultants will furnish the following data when issuing inquiries for variable effort units.
When the Load variation percentage exceeds 25% or the specified max LV% in a variable hanger, it is choice less but to go for a CES.
There are situated other two spring with horizontal orientation to balance any extra load coming in upward or downward direction.
The latter is intended to carry the weight of the pipe work and allow it to move freely under normal operating conditions.
The restraint system is intended to protect the pipe work, the plant and the structure from abnormal conditions; it should not impede the function of the supports.
In areas that are situated on or near to geological fault lines it is common practice to protect the plant from potential earthquake activity.
The environment can cause disturbance due to high wind load or in the case of offshore oil and gas rigs, impact by ocean waves.
Therefore, dynamic restraints are required to be very stiff, to have high load capacity and to minimize free movement between pipe and structure.
[6] Some methods for corrosion protection include: painting, zinc coatings, hot dip galvanizing or a combination of these.
[7] In the case of FRP composite pipe supports, the elements required to form a corrosion cell aren't present, so no additional coatings or protections are necessary.
