title_body: Are ALL keg beer non-pasteurized?
upvoted_answer: Beer kegged in the USA is usually stored cold and consumed quickly. Therefore, sterile filtration is all that's needed. To make it stable in a wider variety of temperatures, especially shipping it over an ocean, they pasteurize it.
  
  From Pasteurized Kegged Beer: 
  
  
    Non-Pasteurized
    
    For the most part keg beer brewed and packaged in kegs in the U.S. is
    not pasteurized. During the packaging process non-pasteurized draft
    beers are sterile filtered and chilled to the point that any surviving
    bacteria, which could ferment the beer, become dormant. Kegs are kept
    cold ( &lt; 50° F ) from the brewery to the point of dispense. Draft beer
    dispensed from a keg should be fresh by storing as short as possible,
    and serving cold at 38° F.
    
    Temperatures above 38° F may promote non pasteurized draft beers to
    turn sour or cloudy. Should the temperature rise above 50° F, the
    dormant bacteria which ferments and spoils beer will once again become
    active and, subsequent growth will rapidly begin to spoil flavor and
    cloud the beer.
    
    Pasteurized
    
    Most of the keg beer brewed and packaged outside the U.S. (Import
    beers), are heat pasteurized during packaging. This process kills off
    the bacteria that ferment and spoils the beer.
    
    Pasteurized draft beer kegs can be transported and stored at room
    temperature. The beer in these kegs can be flash cooled at the point
    of dispense. However, most imported kegs are stored and dispensed at
    the same temperature (38° F) as domestic, non-pasteurized kegs.