Hydrate Temperature Calculator

Gas Properties

Pressure

psig

Gas Gravity (Air=1.0)

Calculation Method

Estimates hydrate formation temperature using the Katz correlation. Hydrates form when free water contacts natural gas at low temperatures and elevated pressures.

Prevention Methods

• MEG/TEG injection
• Methanol injection
• Dehydration (< 7 lb/MMscf)
• Heating/insulation
• Depressurization

Formula (Katz Correlation)

T = A × log(P) + B

T = Hydrate temperature (°F)

P = Pressure (psia)

A, B = f(gas gravity)

Standards & References

GPSA Engineering Data Book
Gas Hydrate Formation Charts
GPA 2145
Predicting Hydrate Formation Conditions
CSMGem / Multiflash
Advanced hydrate prediction software

Important Notes

Katz correlation valid for sweet natural gas (0.55-0.70 gravity)
Requires free water present - dry gas (< 7 lb H₂O/MMscf) won't form hydrates
Acid gases (CO₂, H₂S) shift hydrate temperature upward
Maintain 10-20°F margin below hydrate temperature for safe operation
Hydrate blockages can occur rapidly - monitor temperatures carefully

Gas Properties

Calculation Method

Prevention Methods

Results

Formula (Katz Correlation)

Standards & References

Important Notes

Related Calculators

Water Content

TEG Dewpoint

Glycol Dehydration

Gas Density