1. Industry standard specifications

-In terms of design standards

-In many design standards related to pipeline systems, such as ASMEB31.1 (power piping) and ASMEB31.3 (process piping), there are principled requirements for the design and application of spring supports and hangers. These standards specify the factors that pipeline systems should consider under different operating conditions (such as temperature, pressure, medium, etc.), indirectly affecting the determination of the compression amount of spring supports and hangers. For example, based on the thermal expansion calculation of the pipeline, estimate the displacement that the spring needs to compensate for, and then determine a reasonable initial compression amount.

-The GB50235-2010 "Construction Code for Industrial Metal Pipeline Engineering" in China also mentions the installation of pipeline supports and hangers and other related content. It requires that the installation of supports and hangers comply with the provisions of the design documents, which means that the adjustment of the compression amount of spring supports and hangers needs to be based on approved design calculations.

-Installation and adjustment standards

-For the installation and adjustment of spring supports and hangers, some industry standards specify the allowable error range. Generally speaking, the adjustment error of spring compression should be controlled within ± 5% - ± 10% of the design value. For example, if the design requires a compression of 100mm for the spring, the actual adjusted compression should be within the range of 90-110mm (± 10%). This is to ensure that the support and hanger can provide stable and design expected support force.

2. Manufacturer's technical guidance documents

-Product manual requirements: Manufacturers of spring supports and hangers usually provide detailed product manuals. The manual contains technical parameters of the spring support hanger of this model, such as spring stiffness, rated load, displacement compensation range, etc. It also provides specific guidance on adjusting the compression amount. For example, some manufacturers may require that when adjusting the compression amount, the support and hanger should be installed in an unloaded state first, and then gradually adjusted according to the actual weight and displacement requirements of the pipeline, and specific numerical ranges or operating methods corresponding to each step of the operation will be provided.

-Special application scenario recommendation: For spring supports and hangers used in harsh environments such as high temperature, high pressure, and strong corrosion, manufacturers may provide additional adjustment recommendations. These suggestions are based on the special design and experimental verification of the product to ensure that the spring support hanger can work properly under special working conditions. For example, in high-temperature environments, due to potential changes in the performance of spring materials, manufacturers may recommend dynamic monitoring and appropriate adjustment of compression during the initial operation of pipelines.

3. Experience standards in engineering practice

-Stability and reliability requirements: In practical engineering, in order to ensure the stability and reliability of the pipeline system, spring supports and hangers should be able to effectively support the weight of the pipeline and adapt to displacement changes during normal operation. Usually, when the pipeline system is in normal operating conditions, the fluctuation range of the support force of the spring support hanger should be controlled within a certain degree. This requires precise adjustment of the compression amount, so that the elastic force of the spring can adapt to the displacement and load changes of the pipeline, avoiding excessive vibration, displacement, or stress concentration in the pipeline.

-Collaborative standards with other supports and hangers: In a complex pipeline system, spring supports and hangers are often used in conjunction with other types of supports and hangers such as rigid supports and hangers. At this point, the adjustment of the compression amount of the spring support hanger needs to consider the collaborative work with other support hangers. For example, to ensure uniform force distribution of the pipeline at various support points and avoid local overload or insufficient support, it is necessary to adjust the compression amount of the spring support hanger uniformly according to the layout and support requirements of the entire pipeline system.

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