Description
TL;DR
The EMT cup solid pig is a rigid pipeline pig with a cast polyurethane body and sealing cups. It dewaters lines, dries after hydrotest, and separates product batches. It handles 2 to 48 inch lines and higher pressure than foam pigs. NACE-compliant materials available.
Product Introduction
The cup solid pig is a rigid pipeline cleaning tool built by EMT for oil, gas, and water lines that need a positive seal and higher driving pressure than foam pigs allow. Its cast polyurethane body carries one or more polyurethane sealing cups that grip the pipe wall and push water, debris, or batch interfaces ahead.
Key points:
– Positive cup seal — Polyurethane cups hold pressure for strong dewatering and batch control
– Rigid cast body — Holds shape in high differential pressure and long-distance runs
– Gas or liquid service — Performs in both single-phase and dual-phase pipelines
Unlike a foam pig, the cup-only solid pig sustains a firm seal that drives water and product over long distances without losing contact.
What Problem Does a Cup Solid Pig Solve?
When a foam pig meets a long, wet, high-pressure line, it can stall or lose seal, leaving water pockets and mixed batches. Operators then repeat runs and accept poor batch separation.
Q: Why choose a cup-only solid pig for dewatering?
A: The cup-only solid pig uses sealing cups that hold a positive seal under higher differential pressure than foam. It pushes water and product interfaces farther in one run, improving dewatering and batch separation while reducing repeat pigging.
Technical Parameters
EMT casts every solid pig body from high-grade polyurethane with full material traceability. Standard and custom cup layouts are available on request.
| Parameter | Specification |
|---|---|
| Available Sizes | 2″-48″ (DN50-DN1200) |
| Body Material | Cast polyurethane (steel-reinforced core optional) |
| Cup Material | Polyurethane, nitrile (NBR) optional |
| Cup Configuration | Single or double cup, adjustable wear pads |
| Temperature Range | -40°C to 120°C |
| Max Operating Pressure | ≤ 70 MPa differential (custom higher on request) |
| Bypass | None / optional bypass port |
| Compatibility | Gas, liquid, dual-phase service |
| Min. Bend Radius | 1.5D |
| Design Standard | NACE SP0102 Pipeline Pigging Practice |
| Certifications | ISO 9001, EN 10204 3.1 material certificates |
Product Advantages
- Positive sealing — Cups grip the wall for strong dewatering and batch separation
- High-pressure run — Rigid body holds shape under far higher differential than foam pigs
- Long-distance drive — Pushes water and interfaces farther in a single pass
- Wear-resistant cups — Polyurethane cups and pads extend service life in abrasive lines
- Configurable layout — Single or double cups with optional bypass for controlled speed
Where Is a Cup Solid Pig Used?
- Onshore gas transmission — Mainline dewatering and drying after hydrotest
- Crude and product pipelines — Batch interface control between grades
- Water injection lines — Removing debris and isolating sweep runs
- Refinery and petrochemical — Plant piping dewatering during turnarounds
- Subsea pipelines — Long-distance commissioning sweeps
- Terminal tank farms — Product batching between storage grades
About EMT
EMT is a Shenyang-based manufacturer of oil and gas pipeline accessories with 25+ years of engineering experience in the energy sector.Our rigorous and unwavering commitment to quality control over the years has made our pig indicators listed as the sole Chinese brand products in the optional products in multiple CNOOC projects. As early as 2010, we began providing products for oil projects in the Asia, Africa and Latin America region, with long-term and ongoing projects such as PDOC, DPOC, Hafaya, Misan, and Graf oil fields, and without receiving any negative quality feedback. At present, our products have also been recognized by companies such as CCED, Oxy, Saudi Aramco, and Shell, and have become members of the “Pigging Products and Services Association (PPSA)”, presenting yet another way for pipe project contractors to access affordable, top-tier products.
Frequently Asked Questions
Q: What is a cup-only solid pig used for?
A: This solid pig dewaters pipelines, dries lines after hydrotest, and separates product batches. Its sealing cups hold pressure for strong interface control. It suits gas, liquid, and dual-phase service.
Q: How does a cup-only solid pig differ from a foam pig?
A: A foam pig is flexible but seals weakly under high pressure. The cup-only solid pig uses rigid cups that hold a positive seal, so it drives water and batches farther in one run and handles higher differential pressure.
Q: What sizes are available for the solid pig?
A: EMT supplies the cup-only solid pig from 2 to 48 inch (DN50-DN1200). Custom body lengths, cup counts, and bypass options are available on request to match your line profile.
Q: Can the solid pig pass standard pipeline bends?
A: Yes. The cup pig passes bends down to 1.5D radius and reduced-bore sections. Cup flexibility lets it conform to the wall without losing the sealing contact needed for dewatering.
Q: What certifications back the manufacturing quality?
A: EMT holds ASME U-Stamp and ISO 9001 certification and issues EN 10204 3.1 material certificates. Solid pigs follow NACE SP0102 pigging practice for material and process control.
Related Products
- The SCP‑D is an integral one‑piece polyurethane solid cast pig with non‑removable discs. Featuring compact structure and reliable sealing, it is cost‑effective. It is applied for short‑distance pipelines, pressure test dewatering, medium separation and light‑duty scale removal, mostly for plant‑station pipelines and short‑term projects. The whole pig needs replacement once worn out.
- The SCP‑SE adopts interchangeable cup‑disc design. Only worn cups require replacement instead of the entire pig. Cups of different hardness are optional for extended service life. It suits long‑distance oil & gas pipelines and regular repeated pigging for heavy deposits, cutting long‑term maintenance costs for long‑term field pipeline operations. Both have good bend‑passing performance: SCP‑D for low‑cost one‑off tasks; SCP‑SE for maintainable repeated pigging.
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