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metengr, As I know the size of allowable flaw is propotional K/(yeild)^2 and I think this might be problem in QA/QC besides the required energy for impact testing for LCC is slighly more than LCB in -29 C (20 instead 18). What do you think?

Dear All, Could somebody help me to undrestanding what is differences between Casting valve material ASTM A352 LCB and A352 LCC, we request in our material requsition for casting valve body in Low Temperature ASTM A352 LCB while Vendor quotation offer ASTM A352 LCC, I realy could not find a...

Dear All, Could somebody help me to undrestanding what is differences between Casting valve material ASTM A352 LCB and A352 LCC, we request in our material requsition for castin valve body in Low Temperature ASTM A352 LCB while Vendor quotation offer ASTM A352 LCC, I realy could not find a...

Hi there, Does anybody know what is diferences between RTRP pipe and GRP pipe and what is the condition for selection of this two type of pipe? Your answer is highly appreciated.

gr2vessels Nice reply, I am so thankful,stars to you.

SJones Thanks for your comment, suppose that you have sound cladding, is it possible we do not consider the NACE requirements for Base Metal or with consideration of NACE requirements it seems we spend money without any achievement?

Thanks everyone for the excellent feedback and comments. Your guidance on the welding type selection helped me nail down the problem.

Ashereng Many thanks from your reply, for more information I have seen in Total spec that for below 2" it is possible to using SW in sour servic "H2S+water" in gas refinery except in 10000# rating but there is also some recommendation for using BW even in below 2" for toxic service. I want to...

Hi every body What about using the socket weld for below 2" pipes in sour service? Thanks a lot.

Hi everybody Is NACE requirements to carbon steel underlining a cladded vessel or nozzles fitted with weld overlay applicable or Not? Many Thanks.

hat123 I don't know you want to drill this hole in live container or not. If you want to attach 2" nozzle to 12" container you should refer to code but if you want to drill 2" hole in 12" live container that has another story!

Many thanks for all reply The nitrogen is not in liquid phase it is gas. For more information please advise the nitrogen has these conditions in producing nitrogen unit battry limit: Operating pressure Pmin=6.7 Pnormal=7.7 Pmax=9 Pdesign=11 all barg Tmin=10 Tnormal=57 Tmax=65 Tdesign=80 all...

Hello there, I will be grateful if somebody help me regarding to putting process drains point for nitrogen lines in gas plant is necessary or not. Thanks in advance

Hi there Does anybody know how I can find the gas plant design safety analysis and criteria for arrangement of overal plot plan. Thanks in advance

As per ASME Code you should test your piping or equipment system after fabrication with test pressure which is stipulated in Code. This is regardless of mill pressure test in mill shop. So we can not consider the mill pressure test instead of field pressure test which is requirement of Code.

As per ASME B31.4 the minimum Test Pressure is 1.25 x internal design pressure subject that in your pipeline stress induced shall not exceed 90% of SMYS. So you should check your profile and if any of these conditions are not satisfied change your test sections. Parviz Farhadi Piping Lead Engineer

We start to basic engineering of one gas refinery plant. From BH report it is cleared that our site land is from Marl Stones. Does any body knows which activity shall be considered regarding to this type of soil? Is there any precaution shall be taken?