English Views: 68 Author: Site Editor Publish Time: 2026-04-13 Origin: Site
Selection Guide for Support Disc Springs in Petrochemical Pipeline Systems: Application and Technical Parameter Analysis of DIN2093 56mm Series
Product Focus: The 001 149 and 001 152 series (D=56mm) serve as core components of petrochemical pipeline support systems, compliant with DIN2093 international standards. These products are suitable for various industrial pipeline elastic support applications. Their structural design and performance parameters have been validated through industry practice, ensuring reliability under complex conditions such as high temperatures and high pressures.
In the petrochemical industry, pipeline systems experience significant thermal expansion and contraction due to temperature variations of media (ranging from-40°C to 450°C). Without effective compensation devices, this can lead to safety hazards such as pipeline joint leaks and support structure deformation. According to the "Petroleum and Chemical Pipeline Design Code" (GB 50316), elastic support devices must possess dual functions of displacement compensation and load stabilization. The DIN2093 56mm series disc springs, featuring a unique conical structure, play a critical role in providing elastic cushioning within pipeline support systems. They effectively absorb thermal displacement while maintaining stable support forces.
Analysis of Technical Parameters for Typical Products (Taking Model 001 150B as an Example)
Outer diameter D: 56.00 mm — compatible with most standard pipe bracket mounting diameters, ensuring structural compatibility with the bracket.
Inner diameter d: 28.50 mm – Optimized shaft diameter clearance to reduce stress concentration during installation
Thickness t: 2.00 mm — Achieves an effective compression stroke of 0.9 mm while ensuring structural strength.
Free height H₀: 3.60 mm — provides sufficient elastic deformation space to meet the maximum thermal displacement compensation requirements for pipelines.
Compression load at 25% capacity: 1910 N — corresponding to the foundation support force under normal pipeline operating conditions, ensuring stable system operation
50% load compression: 3335 N — Peak load during extreme temperature variations of pipelines to ensure support safety
In constant force spring support systems, disc spring assemblies achieve a displacement compensation range of 50-200mm through multi-layer stacking configurations (typically 2-8 series-connected plates), with load fluctuation controlled within ±5% compliance with API 692 standards. For variable spring support applications, adjusting disc spring pre-compression levels enables optimal alignment with pipeline thermal displacement curves, effectively mitigating additional stresses caused by rigid supports. Surface treatments include zinc-nickel alloy coatings (8-12μm thickness) or epoxy resin powder spraying (60-80μm thickness), demonstrating over 500-hour resistance in neutral salt spray tests. These products are engineered for outdoor, coastal, and high-humidity industrial environments.
Application Value Analysis of Petrochemical Pipeline
Thermal displacement compensation function: The disc springs absorb axial and lateral displacements caused by temperature changes in pipelines through elastic deformation, thereby reducing shear stress at joints and minimizing flange leakage risks. An application case from a catalytic cracking unit at a refinery demonstrated that the adoption of this series of disc springs reduced pipeline joint leakage rates by 62% compared to traditional rigid supports.
Support force stability: Within the temperature range of-30°C to 200°C, the load decay rate is ≤3%/1000 hours, ensuring that the pipeline does not sag or deviate during long-term operation. According to third-party test reports, this series of disc springs maintains a support force retention rate of over 95% after continuous operation for 5000 hours under 150°C operating conditions.
Enhanced environmental adaptability: Special coating treatment resists corrosive media such as SO₂ and H₂S in industrial atmospheres, with a service life exceeding 15 years in salt spray environments—8 years longer than conventional galvanizing treatment.
For customized spring support technical solutions based on specific pipeline parameters (diameter, medium temperature, displacement), please contact the technical support team to obtain detailed selection manuals and engineering case references.
The nominal pipe diameter (DN50-DN1200) must match the outer diameter of disc springs at a ratio of 1:1.2 to 1:1.5. For instance, DN400 pipelines are recommended to use disc springs with diameters of D=56mm or D=60mm. When operating at temperatures exceeding 200°C, high-temperature tempered disc springs (operating temperature ≤300°C) should be selected. These springs are fabricated from 50CrV4 spring steel and undergo a quenching process at 860°C followed by tempering at 420°C to ensure elastic stability under high-temperature conditions.
According to the "Design Code for Pipeline Supports and Hangers" (SH/T 3073), the support force F must satisfy the formula F = 1.2 × pipeline self-weight + medium weight + additional loads. Taking a DN300 steam pipeline (medium temperature 350°C) as an example, with a linear weight of approximately 28 kg/m and using 001 152 series disc springs (with 50% compression load of 3335 N), it is recommended to install one support group every 2 meters. Each group consists of four disc springs connected in parallel, providing a support force of 13340 N, which meets the design requirement of a safety factor of 1.5.
The installation height of disc spring assemblies must allow for compression space equivalent to twice their free height. For the 56mm series disc springs with a free height of 3.6mm, the bracket design should incorporate an adjustment allowance of ≥7.2mm. In space-constrained utility tunnel areas, nested disc spring assemblies (with a height compression ratio of 1:3) can be employed to reduce installation space by 50% while maintaining equivalent support capacity.
Compared to GB/T 1972-2005 national standard disc springs, DIN2093 standards demonstrate advantages in the following aspects: ① Stricter dimensional tolerance control (outer diameter ±0.1mm, thickness ±0.05mm); ② Higher load testing requirements (requiring load curves at 25%,50%, and 75% compression levels); ③ More stable material mechanical properties (yield strength ≥1250MPa, elastic modulus 206±5GPa). In a large-scale ethylene project, the pipeline system employing DIN2093 56mm series disc springs achieved a 28% reduction in vibration amplitude compared to those using national standard disc springs, with equipment operating noise levels dropping below 85dB.
Observation: Some users, in pursuit of safety margins, compress disc springs beyond the 75% limit value, resulting in plastic deformation within six months.
Solution: Strictly control the compression ratio within 25%-50%, and enhance the total load by increasing the number of disc springs (in parallel) rather than employing single-disc over-compression.
Observation: Red rust corrosion appeared on galvanized-coated disc springs used in sulfur-containing pipeline media after three months of operation.
Solution: Select Dacromet + sealed layer composite coating (1000-hour salt spray resistance) or stainless steel (1.4571) disc springs to accommodate corrosive environments.
Phenomenon: Reversed installation of disc springs (with the larger end facing downward) results in an actual load 15% lower than the design value.
Solution: Install the product strictly with the 'UP' side facing upward as indicated on the label to ensure proper load-bearing capacity of the conical surface.
Case 1: Pipeline Retrofitting of Atmospheric and Vacuum Distillation Unit at a Refinery
Project specifications: DN500 crude oil pipeline with medium temperature at 320°C and thermal displacement of 45mm. The system employs 001 152 series disc springs (8 pieces in series) spaced 3 meters apart. After two years of operation, inspection revealed a disc spring load decay rate of 2.3% and pipeline verticality deviation ≤2mm/m, fully compliant with API 570 pipeline inspection standards.
Case 2: Low-Temperature Pipeline Support at LNG Receiving Terminal
Application scenario: -162°C liquefied natural gas pipeline, utilizing 001 149 series low-temperature disc springs (operating range from-196°C to 100°C) in conjunction with polytetrafluoroethylene (PTFE) guide sleeves to address cold shrinkage compensation and sliding friction issues under low-temperature conditions. The system has maintained a fault-free operation record for 3 years.
To streamline the selection process, technical support can be obtained through the following methods: ① Download the DIN2093 Plate Spring Selection Software from the official website, input parameters such as pipe diameter, temperature, and displacement, and generate recommended models automatically; ② Submit a pipeline schematic diagram to the technical email address, and engineers will provide customized calculation reports (including load curve diagrams and installation schematics); ③ Attend the quarterly "Petroleum and Chemical Pipeline Support Technology Seminar" to access the latest industry case studies and standard interpretations.
