Industry specifications for natural gas pipelines, NGLs, and LPG products.
| Parameter | Typical Spec | Stringent Spec | Unit |
|---|---|---|---|
| Heating Value | 950-1150 | 970-1110 | Btu/scf |
| Wobbe Index | 1320-1400 | 1340-1380 | Btu/scf |
| H₂S Content | <4 | <0.25 | ppmv |
| Total Sulfur | <20 | <5 | gr/100 scf |
| CO₂ Content | <2-3 | <1 | mol% |
| N₂ Content | <3-4 | <1 | mol% |
| Water Content | <7 | <4 | lb/MMscf |
| HC Dew Point | <20 | <10 | °F @ 800 psig |
| O₂ Content | <0.2 | <0.01 | mol% |
| Mercury | <10 | <0.01 | μg/Nm³ |
| Product | Purity | RVP (psia) | Typical Contaminants |
|---|---|---|---|
| Ethane (C2) | >90-95% | N/A | Methane <5%, Propane <5% |
| Propane (C3) | >95% (HD-5) | 208 max | Propylene <5%, Butanes <2.5% |
| Butane (C4) | >95% | 70 max | Pentanes <2%, Propane <2% |
| Natural Gasoline | C5+ >85% | 10-14 | Butanes <5-10% |
| Y-Grade | Mixed NGLs | Varies | No free water |
| Property | Specification | Test Method |
|---|---|---|
| Propane content | 90.0% min | ASTM D2163 |
| Propylene content | 5.0% max | ASTM D2163 |
| Butanes & heavier | 2.5% max | ASTM D2163 |
| Vapor pressure @ 100°F | 208 psig max | ASTM D1267 |
| Volatile residue | -37°F max | ASTM D1837 |
| Residue on evap | 0.05 mL max | ASTM D2158 |
| Corrosion | No. 1 max | ASTM D1838 |
| Total sulfur | 185 ppm max | ASTM D2784 |
| Moisture | Pass | ASTM D2713 |