COOLDOWN REQUIREMENTS FOR LONG DISTANCE, HIGH CAPACITY BURIED LNG PIPELINES

The Royal Military College of Canada investigated the cooldown requirements for a 1000 mi, 1 billion cut ft/day, 20 in. buried LNG pipeline operating at 1000 psi. Requirements included the cooldown time, inlet mass flow rate and pressure, mass flow rate and spacing of intermediate venting positions, and storage requirements and venting losses. It was assumed (1) cooldown used LNG, (2) the vapor-phase gas produced was vented at intervals and either flared or supplied to intermediate markets, (3) the pressure drop in the liquid phase was negligible compared to that in the vapor phase and could be maintained using existing LNG pumps, and (4) the cooldown was complete when the pipeline reached steady state operating temperatures. The venting mass flow rate, as limited by available pressure and by the pressure drop in the vent line, is a critical factor.

• Supplemental Notes:
  • Presented at the 13th International Congress on Refrigeration, Washington, D.C., Aug. 27-Sept. 3, 1971.
• Corporate Authors:

  International Congress on Refrigeration (13th)

  ,    
• Authors:
  • Coulter, D M
• Publication Date: 1971-8

Media Info

• Pagination: 6 p.

Subject/Index Terms

• TRT Terms: Construction; Insulation systems; LNG pipelines; Pipelines; Structural design
• Old TRIS Terms: Pipeline construction; Pipeline design; Pipeline insulation
• Subject Areas: Construction; Freight Transportation; Marine Transportation; Pipelines; Terminals and Facilities;

Filing Info

• Accession Number: 00056124
• Record Type: Publication
• Source Agency: American Petroleum Institute
• Files: TRIS
• Created Date: Jul 15 1974 12:00AM