During the operation of industrial pipeline systems, improper selection of support solutions often leads to a series of problems:
▶ Excessive pipeline stress: When high-temperature pipelines undergo thermal displacement, changes in supporting force cause weld cracking and joint leakage
▶ Equipment interface damage: Thermal expansion thrust of pipelines is transmitted to sensitive equipment such as pumps and compressors, resulting in equipment offset or seal failure
▶ Support and hanger jamming failure: Improper installation and commissioning prevent springs from working normally, causing pipeline sagging and deformation
▶ High operation and maintenance costs: Frequent maintenance and replacement affect production continuity
To address these common industry problems, we provide a mature solution verified by 14 years of engineering practice — Constant Spring Support for Pipeline.
| Constant Spring Hanger Spec Table | Example |
| Model / Series | PH, LH, CA, CS, TH |
| Load Capacity (Operating) | 0.1 kN - 500 kN |
| Total Travel | 50mm, 100mm, 200mm, 400mm |
| Actual Travel | Up to 600mm |
| Load Deviation (Tolerance) | ±5% (Standard) / ±3% (High Prec.) |
| Installation Position | Horizontal / Vertical |
| Housing Finish | Hot Dip Galvanized / Epoxy |
| Operating Temp. | -20°C to +80°C (Ambient) |
| Spring Coil Material | 60Si2Mn / 50CrVA |
| Load Adjustment Range | ±10% (Field Adjusting) |
Constant Spring Support for Pipeline is a base-type constant force support device specially designed for bottom support of pipelines, suitable for working conditions where there is no lifting space above the pipeline and support from the foundation or platform upward is required.
Different from hanger types, the constant force spring support is directly placed on steel beams, concrete foundations or supporting steel structures, and connected to the bottom of the pipeline through the base. Throughout the entire process of vertical thermal displacement of the pipeline, it always outputs stable supporting force with the load change rate controlled within ±5%, fundamentally eliminating additional stress caused by thermal displacement.
Since its establishment in 2012, Yangzhou Tianshun Pipeline Technology has provided tens of thousands of sets of pipeline support products for power and petrochemical projects in more than 40 countries around the world, accumulating rich on-site application experience.
According to the industry standard NB/T 47038—2019 Constant Force Spring Supports and Hangers, combined with engineering practice experience, the selection criteria are as follows:
|
Judgment Condition |
Recommended Solution |
|
Pipeline vertical thermal displacement ＞ 12mm |
Prioritize constant force spring supports and hangers |
|
Pipeline vertical thermal displacement ≤ 12mm |
Variable force spring supports and hangers are optional |
|
Load change rate requirement ≤ 6% |
Constant force spring supports and hangers must be selected |
|
Connected to sensitive equipment (steam turbines, pumps, compressors) |
Constant force spring supports and hangers must be selected |
|
No lifting space above the pipeline |
Choose Constant Spring Support for Pipeline (base-type support) |
|
Steel structure beams above the pipeline |
Constant force spring hangers are optional |
▶ Pipeline working load (including weight of pipeline, medium and insulation layer)
▶ Vertical thermal displacement value of pipeline from cold state to hot state
▶ Working environment temperature range
▶ On-site installation space constraints
▶ Execution standard requirements (national standard / chemical standard / power standard)
|
Parameter Category |
Technical Indicators |
Remarks |
|
Load range |
0.5kN ~ 800kN |
Super large load specifications customizable |
|
Displacement range |
50mm ~ 400mm |
20% displacement margin recommended |
|
Load constancy |
≤±5% |
Outperforming national standard requirement of ≤6% |
|
Working temperature |
-20℃ ~ 450℃ |
Customizable for special working conditions |
|
Load adjustment range |
±10% |
On-site fine adjustment available |
|
Installation type |
Base-type support |
Bottom rooting installation |
|
Execution standards |
NB/T 47038, HG/T 20644, GB/T 17116 |
Can follow customer-specified standards |
|
Spring material |
60Si2MnA spring steel |
Vacuum heat treatment process |
|
Shell material |
Q345B structural steel |
Integral welding forming |
|
Comparison Item |
Constant Force Spring Support |
Variable Force Spring Support |
Rigid Fixed Support |
|
Load change rate |
≤±5% |
15%~25% |
100% (no displacement compensation) |
|
Applicable displacement |
＞12mm, max 500mm |
≤50mm |
0 (no displacement) |
|
Impact on pipeline stress |
Almost no additional stress |
Certain additional stress |
Severe stress concentration |
|
Equipment protection |
Best, minimum thrust |
Average |
Poor, thrust directly transmitted |
|
Structural complexity |
Relatively high |
Simple |
Simplest |
|
Procurement cost |
Relatively high |
Medium |
Lowest |
|
Full life cycle cost |
Lowest (maintenance-free, long service life) |
Medium |
Highest (frequent maintenance) |
|
Recommended scenarios |
High-temperature and high-pressure long-distance pipelines, sensitive equipment connection |
Medium and small diameter pipelines at general temperature |
Short pipelines without thermal displacement |
Although the initial procurement cost of Constant Spring Support for Pipeline is relatively high, from the perspective of full life cycle of more than 10 years, its comprehensive cost is superior to other solutions due to its maintenance-free feature, high reliability and low failure rate.
▶ All spring steel is from large domestic steel mills with material certificates
▶ Hardness testing and composition re-inspection are conducted before each batch of spring materials is put into storage
▶ Welding materials match the base metal and pass welding procedure qualification
▶ Springs undergo vacuum heat treatment after winding to eliminate internal stress
▶ Each spring is individually load tested, with load-displacement curves recorded
▶ Full stroke test is conducted after complete assembly to ensure constancy meets standards
▶ Surface anti-corrosion treatment: sandblasting derusting + epoxy zinc-rich primer + topcoat
Each Constant Spring Support for Pipeline completes the following inspections before delivery with reports issued:
▶ Appearance and dimension inspection
▶ Full stroke load constancy test
▶ Locking device function test
▶ Displacement indicator calibration
|
On-site Problem |
Possible Cause |
Solution |
|
Abnormal noise from support during pipeline displacement |
Friction between roller and guide rail |
Apply grease regularly |
|
Actual displacement inconsistent with design |
Pipeline stress calculation deviation |
On-site load can be fine-tuned within ±10% range |
|
Excessive spring compression |
Improper selection or overloading |
Recalculate load and replace matching model |
|
Support base deformation |
Insufficient rooting foundation strength |
Reinforce foundation or increase support area |
|
Severe corrosion |
Strong environmental corrosiveness |
Select stainless steel material or add anti-corrosion coating |
1.Technical consultation: Professional sales team provide selection suggestions based on your pipeline parameters
2.Scheme confirmation: Issue product specifications and quotations, confirm technical requirements and delivery time
3.Production and manufacturing: Produce according to orders, production progress feedback available during the process
4.Factory inspection: Complete inspection with test reports and qualification certificates attached
5.Logistics and delivery: 7-15 days delivery for conventional models, customized products delivered according to agreed cycle
6.After-sales support: Provide installation guidance, respond to product quality problems within 24 hours
Yangzhou Tianshun Pipeline Technology always adheres to the business philosophy of "stable quality, professional service". Our products have been operating stably in engineering projects in more than 40 countries including the United States, the United Kingdom, Brazil, Singapore and South Africa. Choosing Constant Spring Support for Pipeline means choosing a reliable pipeline support solution verified by global engineering practices.
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No.115 Yunhe North Road, Yangzhou City.Shuzhou, China
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If you have any enquiry about quotation or cooperation, please feel free to email us at jsts2021@yeah.net or use the following inquiry form.Our sales representative will contact you within 24 hours. Thank you for your interest in our products.
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