6% H2S pipeline
6% H2S pipeline
(OP)
What type pipe material would you recommend?
6% H2S 10,000 blpd
Pending fluid data, assuming approx.
Pressure - 600-650 psig
Temp - 100 F
6% H2S 10,000 blpd
Pending fluid data, assuming approx.
Pressure - 600-650 psig
Temp - 100 F





RE: 6% H2S pipeline
Use of Grades 56 or higher may require detailed consideration of the materials properties and welding procedures.
Corrosion inhibitors would be used to mitigate general corrosion issues and a regular monitoring/inspection program would need to be established.
RE: 6% H2S pipeline
A106 gr.B smls (I think is 52,000)
Thickness?
I have heard X60 is typically used also.
Thickness?
Will be using a H2S scavenger chemical also.
RE: 6% H2S pipeline
8" Sch.160, 0.906", id 6.813", 0.644 psid/100ft, 10 mile long pipeline
2. CA- question is what I need to determine. Is 0.906" wt sufficient? I am hoping someone may have an old sour gas pipeline spec for comparsion.
too bad you can't edit your own post here (after you submit).
RE: 6% H2S pipeline
I would recommend you consult a metallurgist if you would like to use X56 or higher. You should also consider whether you need to have pipe tested for Hydrogen Induced Cracking (HIC) resistance. Refer to NACE Report 8X194.
Thickness is calculated per your applicable design code. Whether you use a corrosion allowance or not is up to the end user. Many end users rely on corrosion inhibition, monitoring and inspection and do not apply a corrosion allowance even to sour pipelines.
As to the pipeline design, you need to consider the pipeline profile in addition to the length. PIpelines with significant elevation changes (up and down) can develop different flow regimes with slugging and other problems. In a sour gas pipeline, you want to make sure your velocities are high enough to keep liquids moving through the line. You don't want stagnant areas that could result in excessive corrosion.
RE: 6% H2S pipeline
http://www.eng-tips.com/viewthread.cfm?qid=130588
You will note that guidance on corrosion allowance is generally beyond the capabilities of a forum such as this.
Steve Jones
Materials & Corrosion Engineer
http://www.oilandgaspeople.com/cv/11499664
http://www.linkedin.com/pub/8/83b/b04
RE: 6% H2S pipeline
S
Corrosion & Rust Prevention Control