Insulation Compression Spring (Mighty Spring)
Quick Details:
- Item: Compression Spring (Mighty Spring)
- Material: Stainless Steel 304 or 316
- Wire Diameter: 3 mm
- Size (H × W × L): 25 mm × 25 mm × 150 mm
- Suitable for: 19 mm (3/4″) banding
- Compression Rate: ~80 lbs/inch
- Packing: 40 pcs/box, 0.3 kg/pc
- Application: Large-diameter tanks & vessels (≥4 m diameter)
- Delivery: 20–30 days (FOB)
- Payment: TT, LC
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The Ecoin Insulation Compression Spring (Mighty Spring) is a heavy-duty stainless steel coil spring engineered to secure thermal insulation blankets over large-diameter industrial equipment. It functions as a constant-tension device accommodating cyclic thermal expansion and contraction of oil tanks, storage vessels, and process equipment subjected to fluctuating operating temperatures.
By maintaining consistent clamping pressure on 19 mm (3/4″) stainless steel banding, the insulation compression spring eliminates re-tightening during service, reducing maintenance labor while extending insulation system service life. The spring is fully compatible with standard 3/4″ wing-seal buckles and banding tools.
Available in SUS 304 and SUS 316 stainless steel, the Ecoin Compression Spring meets the performance benchmark of the GLT Compression Mity-Spring — making it a cost-effective direct-replacement alternative for insulation contractors in North America, Europe, and Asia-Pacific.
Compression Spring Technical Specifications
| Parameter | Value |
|---|---|
| Item Name | Compression Spring (Mighty Spring) |
| Material | SUS 304 / SUS 316 Stainless Steel |
| Wire Diameter | 3 mm |
| Height (HD) | 25 mm |
| Width (W) | 25 mm |
| Length (L) | 150 mm (~6″) |
| Banding Width | 19 mm (3/4″) |
| Compression Rate | ~80 lbs/inch |
| Unit Weight | 0.3 kg/pc |
| Packing | 40 pcs/box |
| Delivery | 20–30 days (FOB) |
| Payment | TT, LC |
Stainless Steel Chemical Composition
| Grade | C | Cr | Ni | Mo |
|---|---|---|---|---|
| SUS 316 | ≤0.08 | 16.0–18.0 | 10.0–14.0 | 2–3 |
| SUS 304 | ≤0.08 | 18.0–20.0 | 8.0–10.5 | — |
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| SUS 316 | ≥205 | ≥520 | ≥40 |
| SUS 304 | ≥205 | ≥520 | ≥40 |
- Constant-Tension Design — Maintains steady clamping pressure as insulation settles or the vessel expands thermally, eliminating loose banding and energy loss.
- Dual Material Option — SUS 304 for standard environments; SUS 316 (with 2–3% Mo) for chloride-rich, marine, or chemical service environments.
- Heavy-Duty 3 mm Wire — ~80 lbs/inch compression rate handles large circumferences and high loads typical of storage tanks ≥4 m diameter.
- Tool-Compatible — Works with standard 3/4″ strapping tensioners, wing-seal buckles, and banding tools; no special tooling required.
- GLT Mity-Spring Replacement — Dimensionally equivalent to GLT Products Compression Mity-Spring #1; a cost-effective direct replacement for insulation contractors.
- Long Service Life — Stainless steel resists rust, stress relaxation, and UV degradation for decades of outdoor industrial service.
- Bolt-Adjust Mechanism — Fine-tune spring gap (1–2 cm recommended) to match thermal expansion of different vessel materials.
- Oil storage tanks (ASTs) — Securing insulation blankets on above-ground storage tanks with diameters of 4 m and above in petrochemical and refinery plants.
- Process vessels — Pressure vessels, heat exchangers, reactors, and process drums in oil & gas, power generation, and chemical processing facilities.
- LNG / LPG cryogenic tanks — Cold insulation systems where thermal cycling causes significant banding contraction.
- Industrial boilers — Hot insulation systems operating above 150°C where vessel expansion is pronounced.
- Large-bore pipelines — NPS 12 and above industrial pipelines with significant thermal movement along their length.
- Marine applications — Ship engine rooms, fuel tanks, and ballast tanks (specify SUS 316 for salt-air environments).
Installation Steps
- Thread Wing Seal Buckle #1 onto the banding strip; pass through one end of the spring box base and lock with the buckle.
- Thread Buckle #2 onto the strip. Wrap banding around the vessel; pass through the other end of the spring base. Tension until spring gap is ~1–2 cm.
- Rotate the adjustment bolt with a wrench to fine-tune tension as required.
Required: 1× banding strip, 1× compression spring, 2× wing-seal buckles, 2× wrenches, safety gloves.
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