Previous in Forum: Pine Oil + Sulfonic Acid   Next in Forum: Food Grade plastics
Close
Close
Close
3 comments
Power-User

Join Date: Jul 2008
Location: India
Posts: 111

Corrosion Allowance

09/15/2010 3:46 AM

Will appreciate your comments about this.

Normally we consider corrosion allowance as nil in Power jobs for services such as condensate, feedwater, extraction steam, etc.

On the other hand we take some CA in OGC jobs.

Pl. explain the analomy.

Thanks

__________________
Be simple and specific for a great success in Life
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Associate

Join Date: Jul 2010
Posts: 50
#1

Re: Corrosion Allowance

09/15/2010 5:11 AM

Sachin,

Corrosion Allowance consideration is normally based on the following.

Material Selection, Working environment and exposure limits.

Most of the companies have established rules based on past experience. Most importantly previous inspection records in regard to corrosion occurances under similar condition will provide you a good guideline for you to setup your limits. You got to consider those and also some info from the below refered codes can be of some help to you.

Guidelines & Data from NACE / API 579 (Fitness for service), API 574 (Inspection Practices for Piping System Components), API 571 (Damage Mechanisms Affecting Fixed Equipment in the Refining Industry), etc. etc.

Register to Reply
Guru
Engineering Fields - Piping Design Engineering - New Member Egypt - Member - Member since 02/18/2007

Join Date: Feb 2007
Location: Cairo, Egypt
Posts: 1733
Good Answers: 244
#2

Re: Corrosion Allowance

09/15/2010 11:08 PM
__________________
It is better to be defeated on principles, than to win on lies!
Register to Reply
Power-User

Join Date: May 2007
Posts: 225
Good Answers: 4
#3

Re: Corrosion Allowance

09/16/2010 6:27 AM

Corrosion allowance is defined after you've made a corrosion assessment and material selection of the plant or item. you've to define through calculation or literature data the corroison rate and then calculate the necessary CA for the design life of the plant or item

http://www.hse.gov.uk/comah/sragtech/techmeasmaterial.htm

S.

Register to Reply
Register to Reply 3 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Copy to Clipboard

Users who posted comments:

Abdel Halim Galala (1); JCS (1); strider6 (1)

Previous in Forum: Pine Oil + Sulfonic Acid   Next in Forum: Food Grade plastics

Advertisement