Cooldown of Large Pipes During the Commissioning Phase of Cryogenic Facilities

10th Topical Conference on Gas Utilization
2010 AIChE Spring Meeting
AIChE Spring Meeting and Global Congress on Process Safety
March 23, 2010 - 8:00pm

Cryogenic facilities such as LNG receiving terminals operate at temperatures as low as -260F. During day to day operations, the temperature in the pipes of the facility is relatively uniform, leading to low material stresses in the pipes. However, during exceptional operations, such as the initial cooldown of the facility performed during the commissioning phase, high temperature gradients exist in every pipe. The cooldown procedure is therefore a critical aspect of the design process and needs to be carefully scheduled to ensure the integrity of the piping. The present study quantifies the material stresses reached during a cooldown procedure for different pipe sizes and pipe support spacing. A model to estimate the cooldown front speed when the cryogenic liquid is first introduced in a pipe is presented. This model also estimates the height of the cryogenic liquid behind the cooldown front and accounts for cryogenic liquid evaporation both in the film and nucleate regimes. Cooldown strategies such as shock cooling with cryogenic liquid and precooling with vapor are also discussed.

This recording is FREE to members of the Fuels and Petrochemicals Division of AIChE. AIChE members may join the Division for only $10. Join F&PD now and return to this page with your new log-in and you will receive this presentation for FREE.
F&PD Members: Simply click on “click here to buy this archived webcast ” below and your ‘0’ price will appear in your shopping cart.
Professional Development Hours
0.5 PDHs
You will be able to download and print a certificate for these PDH credits once the content has been viewed. If you have already viewed this content, please click here to login.

Would you like to access this content?

No problem. You just have to complete the following steps.

You have completed 0 of 2 steps.

  1. Log in

    You must be logged in to view this content. Log in now.

  2. Purchase Technical Presentation

    You must purchase this technical presentation using one of the options below.
    If you already purchased this content recently, please click here to refresh the system's record of ownerships.


Credits 0.5 Use credits
List Price $25.00 Buy now
AIChE Members $15.00 Buy now
AIChE Fuels and Petrochemicals Division Members Free Free access
AIChE Undergraduate Student Members Free Free access
AIChE Graduate Student Members $15.00 Buy now
Related Topics: