Calculators›Pipeline Drying
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Pipeline Drying

Methanol · Dehydration · Water Removal

Pipeline Drying Calculator - Post-Hydrotest Commissioning
Calculate methanol requirements, air/nitrogen drying time estimates, and hydrate prevention analysis for pipeline commissioning per API RP 1110. Water content values per GPSA Figure 20-3.

Pipeline Specifications

inches
miles
psig

Temperature & Dewpoint

°F
°F
%

Quick Reference

Dewpoint Requirements:
• Gathering: 40-60°F
• Transmission: 20-40°F
• High-pressure storage: -40°F

Methanol Properties:
• Absorption: 0.7 lb H₂O/lb MeOH
• Density: 6.63 lb/gal @ 60°F
• TLV: 200 ppm (toxic)
• Flash point: 52°F

📚 Learn the Theory

Comprehensive coverage of air, nitrogen, vacuum drying methods, dewpoint specifications, and drying time calculations.

Read Engineering Guide →

About This Calculator

Calculates methanol slug requirements, air/nitrogen drying time estimates, and hydrate formation analysis for post-hydrotest pipeline commissioning.

Standards & References:

  • GPSA: Fig. 20-3 water content data
  • API RP 1110: Pipeline pressure testing
  • ASME B31.8: Gas transmission piping
  • Katz: Hydrate formation correlation

Key Calculations:

  • Methanol volume for water absorption
  • Hydrate formation temperature
  • Air/N₂ drying time estimates
  • Recommended slug volumes

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