Situation:
A. Have a 1500# carbon steel actuated ball valve with butt weld ends in B31.3 piping. A pressure class break occurs after that to 300#.
Question:
B. Should one side of the butt weld end valve be specified for the required wall schedule at 1500# and the other end for 300#?Or should...
Does anyone know if Chromium Carbide Coating has a lower temperature limits. I know it works well at and even 450 deg C, but it will per just as well at -50 deg C, assuming other conditions remains the same? Its for a ball valve application i.e. seat insert and ball coating. Treat it as a...
Can piping be painted before hydrotest? ASME B31.3 does not address this but as a good engineering/fabrication measure the oil and gas/petrochemical industries require that the hydrotest take place prior to painting.
I have a contractor who has accidentally painted his spools, assembled all of...
For a high temperature/pressure application, if BEM design is found to be acceptable (within stress limits), would there be any incentive in using a AES design if BEM could do the job?
What I've 'heard' is that AES could be prone to internal leakage (thru its internal floating head), not to...
For which sizes and conditions are the above fittings necessary? I have given some examples here and if it is otherwise, let me know:
1. All trunnion mounted valves i.e. maybe 4" to 6" and larger for ANSI classes
2. Expensive valves in extreme high pressure and critical isolatio service i.e...
Are there any restrictions on pipe/schedule sizes below which specimen and satisfactory impact testing cound not be performed? ASTM A370 does not provide any guidelines on this.
The smallest specimen per A370 is 2.5mm x 10mm x 50mm.
Any input will be appreciated.
One valve vendor is proposing to use PEEK as the soft seat insert for 15000 psi valves. These are instrumnent double block and bleed valves (DBB), typically DN50 and 80.
If anyone here has experience using soft seats for 15k psi valves, please share.
Service: hydrocarbon NACE.
Location: Offshore production platform
Service: Hydrocarbon gas
The project has several ball valves located on the flowlines of high pressure gas well christmas trees. The flowlines are rated to API 10k and 15k (PSL3G), in accordance with API 6A.
API 6A applies to wellhead equipment i.e. the...
Has anyone heard of High Pressure Isostatic Pressing being used a method of manufacturing valve bodies especially in duplex construction?
If so:
- names of reputable valve mnaufactuers capable of it will be appreciated, based on previous experience
- does HIP'ing take a longer manufacturing...
Enviroment: Offshore Facility (Hydrocarbon Gas/Crude Processing)
Design Code: B31.3
I have tried several places and have not got a straight answer. This is the question.
I have a carbon steel 150# class for which the associated Piping Materials Class Specification design conditions are rated...
A fundamental question (the 1st question):
- Take for example I have a 150# line class and I need a valve in there. Will I be correct in assuming that a 150# class valve will automatically be suitable for it?
The reason I am asking is valves have their own MAWPs I believe (which is slightly...
The project has substantial CRA piping material application (because of wet CO2 corrosion). We are looking at ways to reduce cost and one of the option was cladded piping and components.
A couple of main concerns with cladded pipes:
1. When there are instrument openings on cladded pipes (2"...
Firstly my apologies if this is a repeat question and it causes inconvenience to anyone here.
I have 18 years experience in the oil and gas industry, B.Eng degree and a P.Eng status here in Alberta (just a month ago). I sat down to think about my career "enhancement" options for sometime, what...
