My question concerns the use of carbon and low alloy steels in H2S-containg environments. The H2S in my case is low - 10ppm - and conditions fall into Region 0 of Figure 1. Therefore Clause 7, Option 1 applies, and it covers SSC, SOHIC and SZC (from the clause title).
Clause 7.1.1 of the...
Can API5L Grade A or B pipe be used for Region 0 in Figure 1 of NACE MR0175/ISO15156-2 2009 without calling up any special requirements?
The impression given in the NACE document in Clause 7.1.1 and 7.2.1.3 is that no special precautions are needed but then goes on to list General Requirements...
Does anyone have experience of or could point me to a reference on the corrosion of austenitic stainless steel (304L and 316L) in 40% nitric acid/30%hydrogen peroxide mixture at 50 deg C? My instinct is that, as these are both oxidisers , the stainless steel would be OK but I'd would prefer to...
To calculate allowable stresses in PD5500, the minimum 1% proof stress for the material (in my case stainless steel 1.4307 - also called 304L) is divided by a factor of 1.5 (clause 2.3.3.3(b) of PD5500). For steel 1.4307 this gives an allowable stress at temperaures below 50 deg C of 153MPa...
This is a specific question about NACE MR0175/ISO 15156-3:2003 which concerns the use of corrosion resistant alloys in oil and gas production. Table A.2 of that standard gives the environmental limits for the use of austenitic stainless steels. A maximum temperature of 60 deg C is given -...
I realise that this is not a question about metals but perhaps someone out there can point me in the right direction. I've been scouring the web and numerous books for quantitaive data on the chemical resistance of silicon carbide in nitric acid. Occasionally I can find a general comment giving...
The effect of sensitisation on the corrosion resistance of austenitic stainless steel is well documentated. My question is - what is the effect on mechanical properties? If a 304 grade stainless steel (i.e. with more than 0.03% carbon) is sensitised by welding or by heating to 700C for 30...
I have an old engineering drawing that refers to Uranus R1. Can anyone identify this or point me in the right direction? I understand that the Uranus brand name was used by Creusot Loire Industries in France but the company folded in 1984.
Is grade 1.4003 steel (also known as 3CR12) suitable for containing water with a chloride content of 100ppm, neutral pH, ambient temperature. I have a second case with 1000ppm chloride - again neutral pH, ambient temperature. I guess general corrosion would be low but pitting and crevice...
