Spherical Gas Holder
maintenance consulting
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Operation and Maintenance
Old pipe re-lining refurbishment
Extending Pipeline Lifespan with Advanced Re-Lining Technology
Overview
The Shuttle Lining Method applies an epoxy resin lining inside gas pipes to prevent leaks caused by joint or corrosion issues. It is compliant with the "Guidelines for Countermeasures Against Corrosion of Internal Pipes" and offers a proven durability of over 40 years. Recent technological advancements have expanded its applicability to a broader range of pipe diameters.
Why DGPS?
DGPS combines cutting-edge expertise with proven lining techniques to provide durable and efficient solutions. Our adherence to industry guidelines and innovative methods ensures enhanced reliability and cost savings for clients.
What DGPS can do
We offer highly efficient and cost-effective piping maintenance technology to customers suffering from deteriorating gas pipes.
How it works & benefits
Principle
Lining resin is injected into a gas pipe to produce a uniformly distributed film on the inner surface. Air pressure is then used to push a spherical lining pig through the resin.
Features
- Improves airtightness of existing gas pipes, reducing construction costs.
- The method can also be used simultaneously with main branch pipe replacement, improving construction efficiency.
- Lining work can be done by a single individual, with approximately 60-75 minutes required per pipe.
- The compact size of the tools allows for co-loading with other tools on the same vehicle.
- Can be used on vertical pipes within a distance of 8 m.
- Can be used with buried piping of varying diameters (25x32 A, 32x40 A). (Requires diameter-specific pigs)
Scope of application
| Pipe type | Threaded-joint steel pipes |
| Size | 25-50 A (Also support reduced diameter piping) |
Supported extensions
| Pipe diameter | Supported extensions Summer use |
Supported extensions Winter use |
|---|---|---|
| 25A | 22m | 16m |
| 32A | 22m | 22m |
| 40A | 24m | 24m |
| 50A | 20m | 20m |
| 25A-32A | 22m | 16m |
| 32A-40A | 22m | 22m |
Schematic Diagram
Necessary equipment, tools
| Product number | Product name | Standard (mm) |
|---|---|---|
| 1 | Operation unit with built-in micro compressor | (W)400×(L)300×(H)290 |
| 2 | Electric stiring unit (with timer) | (W)310×(L)345×(H)570 |
| 3 | Injection jig | (H)280×230 |
| 4 | Single lining pig (25A) | 外径24.0Φ+1.0～-0.5 |
| 5 | Single lining pig (32A) | 32.0Φ+1.0～-0.5 |
| 6 | Single lining pig (40A) | 37.5Φ+1.0～-0.5 |
| 7 | Single lining pig (50A) | 47.5Φ+1.0～-0.5 |
| 8 | Closing jig (50A) | 25A, 32, 40A, 50A |
| 9 | Other hosing | |
| Category | Standard | ||
|---|---|---|---|
| Type | Epoxy resin (two-liquid mixture, base and hardener) | ||
| Curing conditions | Cures at room temperature | ||
| Curing time (23℃) | 24+ hours | ||
| Viscosity | Base | 200+ P | |
| Hardener | 170+ P | ||
| Mixture | 150-800 P | ||
| Working time | Within 2 hours | ||
| Type | Summer type (May-October) ※Usage period may vary by location | ||
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