Ammonia plant piping specification

[zebmahar]

I just want to know what kind of pipes can be used for Ammonia plants with low temperature. One of our valued clients would like to know that, can ASTM A-106 with ANSI B-31.5 pipes work satisfactorily in ammonia plant.

Best regards.
Jahanzeb

 

[blacksmith37]

Ammonia refridgeration ? Ammonia production ? Type of production? : Or ,temp?, pressure?, composition ?
There are some sections of some production units where high temp hydrogen attack will occur-- A106 /carbon steel is unacceptable there.

 

[zebmahar]

the client is going to use these pipes in Ammonia refridgeration.

Thanks Blacksmith37 for your kind reply

 

[zebmahar]

Waiting for your replies guys come on help me out....


Regards
Jahanzeb

 

[europipe]

Please give design criteria: pressure and temp.

 

[zebmahar]

I have again consulted the client he is willing to use ASTM A-106 & ANSI B 31.5 pipes in chiller. The client is also want as to give him written certification that these pipes will perform satisfactorily work in chiller. As far as my knowledge is concerned the ASTM A-106 pipes are for high temperature services and ANSI B 31.5 is refrigeration piping standard. Although the tables provided in ANSI B 31.5 for allowable stresses and materials also include ASTM A-106 materials but I have some doubts because I have to give them certification in written. What is your expert advice in this situation? Waiting for your replies and help to resolve this issue as soon as possible


Thanks
Jahanzeb

 

[ColonelSanders83]

I would get ahold of a copy of the International Institute of Ammonia Refrigeration (IIAR) Piping Handbook.

Available Here

https://www.iiar.org/catalog/iteminfo.cfm?itemid=1451&compid=1&pcatid=0

You will need to check you temperature range for A-106. The upper bounds of the temperature rnge will not be a concern, However you will need to confirm the lower temperature bound.

If you drop below -20F for 3/8" and thinner wall, you will either need to consider A333 (cold service material) or impact testing. The thicker your pipes get the higher the low temperature limits become.

We use A106 gr B and A53 gr B in all out ammonia plants.

A question properly stated is a problem half solved.

Always remember, free advice is worth exactly what you pay for it!

http://www.ap-dynamics.ab.ca/