Acceptance Criteria for Air Blow in API standard
Acceptance Criteria for Air Blow in API standard
(OP)
Hello, is there any acceptance criteria for air blow to clean the pipe line, clearly specified in API standard?
Thanks a lot.
Thanks a lot.





RE: Acceptance Criteria for Air Blow in API standard
There are some interesting guidelines and reference materials prepared by GEA and EPRI (Electric Power Research Institute). See attached.
Dejan IVANOVIC
Process Engineer, MSChE
RE: Acceptance Criteria for Air Blow in API standard
Once I found, I will come back here to post it.
RE: Acceptance Criteria for Air Blow in API standard
Anything bigger than a grain of sand would not move or if it does, becomes a highly dangerous projectile.
If you start very clean then I have seen cleanliness targets based on the number of hits on a very thin aluminium screen on the end of a tee where flow diverts to one side.
Emmanual top - that's a great document.
one thing to remember in the pack and blow techniques is that the velocity at the far end from the vent point is very low and hence even repeated blows will not shift this debris unless you can stagger the blow.
Whatever you do you will find more dust and debris when you start using a system so prepare for lots of filter changes...
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Acceptance Criteria for Air Blow in API standard
During the (pre-)commissioning job in Qatar, we found several helmets, wrenches, and one fire extinguisher in the compressor suction line (36" dia). The line was flushed with water and all that stuff was found in the temporary strainer. I don't think the air would be able to move a fire extinguisher that far
Dejan IVANOVIC
Process Engineer, MSChE
RE: Acceptance Criteria for Air Blow in API standard
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist
RE: Acceptance Criteria for Air Blow in API standard
Thanks everyone for input
RE: Acceptance Criteria for Air Blow in API standard
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist
RE: Acceptance Criteria for Air Blow in API standard
RE: Acceptance Criteria for Air Blow in API standard
In any case, with that statement I'm done. I have zero time for anyone who would rather leave a cryo line full of hard hats, fire extinguishers, and construction skids because of the myth of AGW.
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist
RE: Acceptance Criteria for Air Blow in API standard
If you want to lower the dew point in the cryogenic piping, you could first use pipeline pigs with methanol.
Else you could dry with hot air from a TSA mole sieves unit - this is what we do for defrosting air separations plants (-195degC operating temp) before startup - finally check air quality at all exit point with a portable dewpoint meter that reads down to -100degC water dewpoint. TSA mole sieves unit should also remove CO2.
RE: Acceptance Criteria for Air Blow in API standard
RE: Acceptance Criteria for Air Blow in API standard
RE: Acceptance Criteria for Air Blow in API standard
our dew point is -70 degress.
RE: Acceptance Criteria for Air Blow in API standard
Last compressor station in the desert blew a lot of dust out of the pipe by air bangs, but commissioning brought the welding rods, some rocks, a cut out from a weldolet, the odd water bottle and even a plank of wood rattling around the scrubber. I have never been more grateful for the extra cost of installing a really really strong top hat filter on the inlet to the compressor as it ended up with 20 bar [sic] across it and still didn't break, but collected a lot of sand, water and the odd large item which could easily have wrecked the compressor. It was bent a bit, but some of the weedy looking filters you can see for commissioning wouldn't stand any damage or significant DP.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Acceptance Criteria for Air Blow in API standard