Attachment 3 Quality specifications.docx
DOCX document 34 KB Posted
- Solicitation number
- N6945026RPW01
About this file
Attachment 3 is a detailed Quality Specifications document for Liquefied Natural Gas (LNG) supplies for a Naval Station Guantanamo Bay, Cuba contract. The specifications provide comprehensive technical requirements for LNG composition, including precise molecular percentage limits for various gas components such as nitrogen, methane, ethane, propane, and trace elements like carbon dioxide. The document mandates strict quality standards, specifying acceptable ranges for molecular composition, heating values, Wobbe Index, and methane number.
The specification also requires a comprehensive manifest and discharge report following LNG delivery, which must include detailed information across multiple categories: general delivery information, time logs, custody transfer measurements, LNG composition breakdown, and physical properties. The document emphasizes environmental compliance, stipulating that LNG deliveries must meet all federal, state, and local environmental requirements, with a provision that more stringent environmental standards will take precedence. In cases where compliance with more stringent requirements incurs additional costs, the contractor may request an equitable adjustment.
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Attachment 3 Quality Specifications Liquefied Natural Gas
Supplies delivered under this contract shall conform to all Federal, State, and local environmental requirements applicable to the geographic location of the receiving activity on the date of delivery. This includes delivery of fuel and documentation in a manner consistent with existing or future Title V (Clean Air Act) Permits. In the event that a Federal, State, or local environmental requirement is more stringent than a similar requirement in the specification contained in this contract, the Contractor shall deliver product that complies with the more stringent requirement. Product that fails to meet the more stringent environmental requirement will be considered to be a nonconforming supply. All supplies furnished under this contract shall fully meet the requirements of the applicable specification(s) as cited below. In the event that compliance with the more stringent requirement causes the contractor to incur additional costs, the contractor may request an equitable adjustment.
| NATIONAL STOCK NUMBER |
| PRODUCT NOMENCLATURE |
| ENERGY PRODUCT CODE |
| 6830-01-672-6379 |
| Liquefied Natural Gas |
| LNG |
a) LIQUEFIED NATURAL GAS
(1) Composition of product shall conform to the table listed below:
| Component |
| Units |
| Rich |
Composition Lean Composition Average Composition Suggested Limits for LNG when converted into gaseous state
| Nitrogen |
| mol% |
| 0.486 |
| 0.713 |
| 0.495 |
| 1,500 maximum |
| Methane |
| mol% |
| 89.299 |
| 97.682 |
| 96.605 |
| 92.000 minimum |
| Ethane |
| mol% |
| 7.601 |
| 1.342 |
| 2.476 |
| 8.000 maximum |
| n-Propane |
| mol% |
| 1.832 |
| 0.171 |
| 0.270 |
| 2.500 maximum |
Maximum butane and heavier (C4+)
2.000 maximum
| i-Butane |
| mol% |
| 0.359 |
| 0.035 |
| 0.059 |
| See C4+ |
| n-Butane |
| mol% |
| 0.280 |
| 0.027 |
| 0.050 |
| See C4+ |
| i-Pentane |
| mol% |
| 0.073 |
| 0.015 |
| 0.016 |
| See C4+ |
| n-Pentane |
| mol% |
| 0.035 |
| 0.008 |
| 0.012 |
| See C4+ |
| Hexane |
| mol% |
| 0.031 |
| 0.001 |
| 0.011 |
| See C4+ |
| Carbon Dioxide |
| mol% |
| 0.0005 |
| 0.005 |
| 0.005 |
| 0.010 maximum |
| Hydrogen |
| mol% |
| - |
| - |
| - |
| Trace |
| Oxygen |
| mol% |
| - |
| - |
| - |
| Trace |
| Molecular Weight |
| lb/lb mol |
| 18.03 |
| 16.40 |
| 16.59 |
| - |
| Higher Heating Value |
| Btu/scf |
| 1,109 |
| 1.017 |
| 1,031 |
| 1,000 minimum |
| Lower heating Value |
| Btu/scf |
| 1,002 |
| 917 |
| 930 |
| 900 minimum |
| Wobbe Index (59 deg. F, 14.696 psia) |
| Btu/scf (HHV) |
| 1,406 |
| 1.351 |
| 1,362 |
| 1,350 minimum |
| Methane Number (AVL calculation) |
| _ |
| 73 |
75 minimum
| Hydrogen Sulfide |
| Grains per 100 scf |
| - |
| - |
| - |
| 0.25 maximum |
| Sulfur |
| Grains per 100 scf |
| - |
| - |
| - |
| 1.35 maximum |
(2) Delivered LNG shall contain no contaminants, water or solid matter that may affect product quality.
Manifest and/or LNG Discharge Report
At a minimum, the manifest/discharge report provided to the Government afetr the delivery shall contain the following.
General Information
· Supplier’s Name
· Supplier’s Vessel
· Location of Delivery
· Receiver
· Receiver Vessel
· Cargo Reference Number
Quantity Delivered
· Volume in cubic meters
· Mass in metric tons
· Gross Energy in MM BTU
· Vapor Displaced in MM BTU
· Net Energy in MM BTU
· Net Energy in MWh
Time Log (Date and time)
· Arrival at Pilot Station
· Arrival at STS Location
· Notice of Readiness Tendered
· Vessel All Fast
· Cargo Arm/Hoss Connected
· Commenced Transfer
· Completed Transfer
· Cargo Arm/Hose Disconnected
· Vessel Sailed.
Custody Transfer Measurements
· Gas Meter Reading at OCT in kg
· Gas Meter Reading at CCT in kg
· LNG temperature before Transfer in degrees C
· LNG Volume OCT in cubic meters
· LNG Volume CCT in cubic meters
· Vapor temperature in degrees C
· Vapor Pressure CCT in MPa
LNG Composition
· Methane in mol%
· Ethane in mol%
· Propane in mol%
· iso-Butane in mol%
· n-Butane in mol%
· Iso-Pentane in mol%
· n-Pentane in mol%
· n-Hexane in mol%
· Nitrogen in mol%
· Oxygen in mol%
· Carbon Dioxide in mol%
· Sulpher in mol%
Physical Properties
· LNG Density at –157.2 C in kg per cubic meter
· Gross Heating Value (mass) at 60 deg. F in btu per kg
· Gross Heating Value (volume) at 60 deg. F in BTU per scf
· Wobbe Index at 60 deg. F. in BTU per scf.
End of Attachment 3.
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