Our supplier is proposing a carbon steel F52 forged flange with a CEV of 0.42, while our client specification is asking for 0.39 saying that the line is sour service. In my personal opinion once we adopt a welding procedure capable to maintain hardness below 22HRc (248 HV10) the request for 0.39...
One of our suppliers states in his P&P procedure that duplex steel pipes can be treated for a time "up to 24 hours". Solution used is 10%-16% nitric acid + 5%-8% hydrofluoric acid in water at ambient temperature (10-25 °C)
Isn't it a very long dwell time? Is there any risk of damaging the pipe...
Hi everybody. Is there anybody who has infos regarding possible problems of compatibility between AISI316L and THPS (Tetrakis (hydroxymethyl)phosphonium sulfate) biocide agent at commercial concentrations (that is before being injected into the water injection line)?
Thanks in advance
Hi everybody. Is there anybody who has infos regarding possible problems of compatibility between AISI316L and THPS (Tetrakis (hydroxymethyl)phosphonium sulfate) biocide agent at commercial concentrations (that is before being injected into the water circuit)?
Thanks in advance
Hi everybody, is there anybody who has experience about possible damage cause by amine based chemicals (corrosion inhibitors) in contact with rubber coatings (we are talking about 0,01% to 1% concentration of the chemical in water)?
Thanks for the help and best regards
Massimo
I've been asked to verify if a carbon steel pipe filled with a mixture of ethylen glycol and distilled water (ratio 1,5/1)at ambient temperature and with no flow can corrode: filling was done in may this year and expected un-filling shall be in next December. In my opinion answer is no since...
My purchase dept. says it's experiencing rising difficulties in finding plates heat exchangers with Titanium plates due to reduced availability on the market of this metal. Therefore they've asked me to find a possible alternative. I've suggested Hastelloy that now is becoumng increasingly...
Hello everybody. Is there anybody who has any knowledge about the use of thermally sprayed alluminium coated AISI316L against bare 22 Cr duplex steel within an environment containing hydrocarbon and water?
thanks a lot
Max
Dear All, we've received for analysis a CS forged spool (about 16" diameter) used to connect a butterfly valve to an heat exchanger. The H.E. is used to cool process water using seawater as cooling medium: into the forged pipe flows seawater that goes into the H.E.
The internal surface of the...
Dear All, is there anybody who knows if the usual pipeline coating (3LPP coating) can be damaged if exposed to active acid sulphate soils? and if so which are the common adopted measures to avoid the risk that is to mitigate the acidity?
thanks
Massimo
Gentlemen, I’m facing this problem: a pipe placed at about 30 m depth has been damaged and possibly broken. The pipe wasn’t in service so it was empty. To analyze the water taken from the inside of the pipe (if any) and (for comparison) the water of the surrounding sea, can give some information...
I've received a material selection where seawater is used first to cool down process water and then reinjected into an oil well. For the first part of the seawater circuit (from intake to deaeration tower) FRP pipes are proposed, then CS pipes with 3 mm CA. Shouldn't be preferable to adopt CRA...
