Founded in 2012, Yangzhou Tianshun Pipeline Technology Co., Ltd. has 14 years of deep expertise in pipeline support solutions for the power industry, with products serving dozens of domestic power plant projects. Our Thermal Power Plant Constant Spring Support is a specialized product developed strictly in compliance with the DL/T series of power industry standards. Specially optimized for the high-temperature, high-pressure, and long-cycle continuous operation characteristics of thermal power plants, it is the core support component for the four major pipeline systems of power plants.
Compared with ordinary industrial pipelines, thermal power plant pipeline systems operate under far harsher conditions:
▶ High temperature and pressure: Main steam pipelines at 540℃~620℃, pressure 16MPa~35MPa
▶ Large thermal displacement: Vertical displacement of main steam pipelines can reach 300~500mm
▶ Heavy loads: Large-diameter thick-walled pipelines, single lifting point load 50~300 tons
▶ High continuous operation requirements: Unit annual operating hours ≥7500 hours, with huge shutdown losses
▶ Sensitive to equipment thrust: Extremely strict requirements for pipeline thrust at steam turbine inlets and outlets
▶ High safety level: Classified as pressure pipelines, with significant safety responsibilities
Ordinary constant spring hangers cannot fully meet these requirements, making dedicated Thermal Power Plant Constant Spring Support essential.
| 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) |
Hangers and supports for thermal power plants must comply with the following power industry standards:
|
Standard Number |
Standard Name |
Core Requirements |
|
DL/T 616 |
Guide for Maintenance and Adjustment of Steam-Water Pipelines and Supports in Thermal Power Plants |
Operation maintenance, adjustment and inspection requirements |
|
DL/T 1113 |
Acceptance Code for Pipeline Supports and Hangers in Thermal Power Plants |
Factory acceptance and installation acceptance standards |
|
DL/T 5054 |
Technical Code for Design of Steam-Water Pipelines in Thermal Power Plants |
Design selection and load calculation |
|
GB/T 17116 |
Pipeline Supports and Hangers Part 1: Technical Specifications |
General technical requirements |
Thermal Power Plant Constant Spring Support fully meets all the above standard requirements, and factory delivery documents can be directly used for power plant quality supervision and acceptance.
|
Power Plant System |
Pipeline Name |
Recommended Product Type |
Typical Parameters |
|
Boiler System |
Main Steam Pipeline |
Thermal Power Plant Constant Spring Support |
100~300 tons, 200~400mm displacement |
|
Boiler System |
Reheat Steam Pipeline |
Constant Spring Hanger/Support |
80~200 tons, 250~450mm displacement |
|
Feedwater System |
High-Pressure Feedwater Pipeline |
Constant + Variable Force Combination |
30~100 tons, 100~250mm displacement |
|
Steam Turbine System |
Turbine Inlet/Outlet Pipelines |
High-Precision Constant Spring Support |
50~150 tons, constancy ≤±4% |
|
Air, Flue Gas & Coal System |
Hot Air Ducts, Flue Gas Ducts |
Variable Force Spring Support |
10~50 tons, 50~150mm displacement |
|
Extraction Steam System |
Steam Extraction Pipelines at All Stages |
Variable Force + Constant Force |
5~50 tons, 50~200mm displacement |
|
Drainage System |
Drainage and Blowdown Pipelines |
Variable Force Spring |
1~20 tons, 30~100mm displacement |
|
Chemical Water System |
Make-up Water, Condensate |
Rigid Support + Variable Force |
Small load, small displacement |
Springs use 60Si2CrVA high-temperature resistant spring steel, reducing stress relaxation rate by 50% at 400℃
High-temperature parts adopt 12Cr1MoV heat-resistant steel to avoid high-temperature creep
Equipped with thermal insulation pipe shoes to block heat transfer from pipelines to springs
Spring operating temperature controlled below 120℃ to ensure long-term performance stability
Constancy improved to ≤±4%, minimizing thrust on steam turbines
Calibrated for both cold and hot working conditions before delivery
Displacement indication accurate to 1mm for convenient operation monitoring
Load-displacement curves available to support pipeline stress analysis
Cam surface with high-frequency quenching + carburizing treatment, 5x longer wear life
Pin shafts with self-lubricating bushings, maintenance-free design
All bolts with anti-loosening measures, no loosening under vibration
C4-level anti-corrosion rating, suitable for outdoor power plant environments
Precisely calibrated according to design institute loads before delivery, direct on-site installation
Equipped with special unlocking tool, one-click unlocking after installation
External load adjustment mechanism, allowing online fine-tuning during operation
Clear displacement markings for easy observation by power plant inspection personnel
Upper and lower mechanical limits to prevent over-travel damage
Hanger rod safety factor ≥5 times, eliminating fracture risk
Spring fracture protection device, ensuring safe support even under extreme conditions
Overload warning markings to prompt operators for timely handling
Common Problems & Preventive Measures
|
Operation Problem |
Cause Analysis |
Preventive Measures |
|
Spring lock not released |
Forgetting to remove locking bolts after installation |
Must be included in installation acceptance checklist |
|
Displacement jamming |
Mechanism rusting, lack of lubrication |
Annual inspection and lubrication of pin shafts |
|
Large load deviation |
Actual pipeline weight inconsistent with design |
Recheck and adjust 1 month after operation |
|
Hanger tilting |
Large horizontal pipeline displacement |
Select structures allowing deflection |
|
Severe corrosion |
Outdoor, coastal environments |
Choose galvanized or stainless steel materials |
Check displacement indicator position and compare with historical records
Verify all locking bolts have been removed
Inspect hanger rods and pin shafts for deformation and cracks
Check welds for cracking
Inspect anti-corrosion coating integrity
Record operation data and establish support/hanger ledger
With proper maintenance, Thermal Power Plant Constant Spring Support has a service life of over 20 years, matching the lifespan of power plant main equipment.
Power Plant Project Delivery StandardsFactory document package (meeting power plant quality supervision requirements):
Product qualification certificate
Material quality certificates
Spring test reports
Complete machine load test curves
Installation and operation manual
Factory inspection records
Technical personnel on-site technical disclosure
Installation guidance and commissioning
Support power plant sectional trial operation
Escort for unit 168-hour trial operation
Served 30+ domestic power plant projects, including 300MW, 600MW, 1000MW units
Provided supports for four major pipelines of an ultra-supercritical 1000MW unit
Replaced over 200 supports/hangers in a thermal power plant renovation project
No quality complaints for consecutive years, high repeat purchase rate from power plants
3-year product warranty, free repair and replacement during warranty period
24-hour response to power plant emergency issues, on-site support within 48 hours
Lifetime technical consultation and spare parts supply
Annual support/hanger inspection service available
Thermal Power Plant Constant Spring Support is the reliable support choice for high-temperature and high-pressure pipelines in thermal power plants. With 14 years of deep experience in the power industry, we thoroughly understand power plant working conditions and standard requirements, ensuring safe and stable unit operation with professional products and services.
Address
No.115 Yunhe North Road, Yangzhou City.Shuzhou, China
Tel
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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