NDT for ammonia storage tank
NDT for ammonia storage tank
(OP)
Hi Dear, as per Code, whether phased arrays test method could be used for ammonia storage tank to replace radiographic test? What are the things that must be considered to make phased arrays test. Many Thanks





RE: NDT for ammonia storage tank
RE: NDT for ammonia storage tank
RE: NDT for ammonia storage tank
RE: NDT for ammonia storage tank
RE: NDT for ammonia storage tank
RE: NDT for ammonia storage tank
What type of ammonia is being stored in this tank ?
Does the tank store the more potent anhydrous ammonia or simply aqueous ammonia ?
In the USA, anhydrous ammonia is typically stored in ASME VIII pressure vessels, designed for 250 psig MAWP.
Anhydrous ammonia corrosion has caused vessel failure in the past
Additional vessel design/quality requirements is mandated by many US states and defined in ANSI K61.1
Aqueous ammonia is stored at a lower pressure.
Some information here:
https://www.osha.gov/dts/shib/shib120505.html
MJCronin
Sr. Process Engineer
RE: NDT for ammonia storage tank
RE: NDT for ammonia storage tank
RE: NDT for ammonia storage tank
RE: NDT for ammonia storage tank
We have to erect an API 620 R double wall ammonia tank .
We are now reviewing the NDT inspection, to avoid future problems related to SCC
If you consider the figure R-2 we add all the verticals 100%RT+20% in the horizontal buttwelds.
If the tank has E=1 for the shell thickness calculation. Are these NDT tests covering the joint efficiencie E=1?.
We are thinkng in UT as alternative for RT .
Regards
Luis
See my thread in Storage Tank engineering
RE: NDT for ammonia storage tank