Spring Supports: Critical Components for High‑Temperature Piping in Thermal Power & Petro‑chemical Plants

In ultra‑supercritical thermal power units, petrochemical refining, aromatics and hydrogen‑production projects, high‑temperature piping generates significant displacement due to thermal expansion and contraction. As core supporting components, constant and variable spring supports absorb thermal displacement, stabilize piping load, and protect equipment and weld joints. They are widely used for main steam, reheat steam and high‑temperature process pipelines.

Nowadays, both new‑build projects and existing‑unit retrofits drive market demand. A number of new‑build 1000 MW ultra‑supercritical power plants and large‑scale refining‑integrated projects are under construction, requiring large quantities of spring supports for main piping systems. Meanwhile, China is promoting flexible retrofitting of coal‑fired power units. Frequent load cycling causes repeated thermal movement. After long‑term service, springs may suffer fatigue, load drift and corrosion failure, bringing steady demand for inspection and replacement.

Product quality of spring supports is vital to plant safety. Excessive load deviation will lead to unbalanced piping stress, pipeline sagging, increased secondary stress, weld cracking and flange leakage, which may result in unplanned shutdown and economic losses.

Therefore, owners and EPC contractors enforce stricter quality control. Products shall comply with ANSI/MSS‑SP‑58‑2018, NB/T47038‑2013 and NB/T47039‑2013. Qualified manufacturers perform individual load calibration and full‑stroke performance test for every unit before shipment. Tag‑No‑based load‑displacement test reports are issued to keep load deviation within allowable limits and mitigate piping‑support‑related risks.

Equipped with professional spring test machines, our factory completes full‑range performance verification for both variable and constant spring supports. Displayed type‑test curves are for capability demonstration only. For formal orders, unit‑specific test reports and material certificates will be delivered for each tag‑no, delivering reliable supporting solutions for thermal power and petro‑chemical piping systems.

Note: Curves displayed on website are typical type‑test samples for reference only. Unit‑specific measured test reports will be provided prior to shipment for formal project orders.