Incident XX-026 Severe corrosion NH3 transfer line

Incident XX-026 Severe corrosion NH3 transfer line

First unread post • 4 posts • Page 1 of 1

Incident XX-026 Severe corrosion NH3 transfer line

by mark.brouwer » Thu Nov 16, 2017 12:38 pm

The Incident:
Severe corrosion of a carbon steel liquid ammonia transfer line to jetty. This line is intermittent in operation with operating temperatures varying between -33 degC and ambient temperatures.

The Cause:
Corrosion under insulation, not proper insulation.

The Consequences:
Potential ammonia leaks, which are not easy to be detected as line can be long (this case 1900 m)
Many repairs needed and complete replacement was required after some 20 years.

The Lessons Learned:
Perform regular corrosion inspections
Assure proper insulation
Install an ammonia leak detection

mark.brouwer

Site Admin

 

Posts: 1323

Joined: Mon Jan 05, 2009 10:35 pm

Location: Maastricht

Title: Mr.

First name: Mark

Last name: Brouwer

Company: Ureaknowhow.com

Country: Netherlands, The

Years in operation: 0

Top

Re: Incident XX-026 Severe corrosion NH3 transfer line

by tark66 » Sat Nov 18, 2017 11:40 am

THE CAUSE OF CORROSION MAY BE DUE TO NOT PROPER INSULATION AND WHEN COLD AMMONIA SUPPLY FROM THIS LINE OUT SIDE MOISTURE CONDENSED ON IT .MOISTURE CONTAINS SOME SEA WATER VAPOURS ALSO.