Search results for query: *

I am looking for alternatives. what we need is only to view the model,being able to rotate and basic dimension measure. Is there a way to view the PDS model in solidworks or inventor? Thanks. --It boils down to simple math--

Please refer to thread292-209303: http://www.eng-tips.com/viewthread.cfm?qid=209303&page=1 We deal with large thin walled pipe with lining. D = 60", t = 0.5" , D/t = 124, A516 Gr70 plate rolled, 30 psi,650 F, B31.3. I want to continue this thread and ask about vacuum rings. We do not have...

I am going to do a piping walk_down for an aged petro plant. Try to get prepared but do not know where to start. I would like to ask for procedures from you experienced guys. All pipe are utility (steam, water and instrument air ) and instrumentation hook-up.Small quantity. Size is up to...

Hi, everyone. I am looking for reference to Gunite (someone call it shotncrete) stiffness and density data. This is for piping stress analysis to account for stiffening effect of refractory lined pipe. Product is 1200 F and 50 psi. Thanks. --It boils down to simple math--

hello, a query regarding piping material. I need to do purchase spec for 74" and 65" lined pipe for petro-chemical plant.Pressure is at 345KPag and metal temperature is 260 degC. My question is how to specify CS plate material. Is there a similar ASTM spec to A53/A106 for smaller size? --It...

When design a steam coil, say steam into coil at 250psi and 400degF, what is the parameter when steam is out of coil? This is a coil for heating water tank which is maintained at 35degF(ambient -40degF). The outlet steam status decides required steam flow rate. I did the calculation and the...

Need to size a water tank heating coil to prevent icing. I evaluated the heat load of the tank and get the heat transfer coefficient between pipe and water. One question is how to get the temperature difference: ambient is -40degF, water is to maintain 32-35degF and steam temperature after...

What is an acceptable and economical method of protective coating for steam pipe under insulation (calcium silicate)? Pipe is for cyclic loading between 450 degF and ambient. Not in high moisture zone. I was told NACE prohibit hot galvanized coating (zinc based) under insulation. Do not know...

In CAESAR, When activating allowable stress under B31.1, the value for A53 B is SC=15000psi. I checked B31.1 2007, which says in table A-1, that the allowable for A53 B is 17.1 ksi up to 650degF. I could not figure out why the difference. Please advise me. Thanks It boils down to simple math.

Is there an easy and effective way to measure low flow rate fo air(6-10gal/hour) under low pressure (1psi)? This is calc of orifice size. Thanks It boils down to simple math.

I was involved into insulation design and process unit thermal calculation.It is to my knowlege that no clear defined ambient heat transfer coefficent(convective and radiative combined). Several design spec defined equations but their results varied in 10 times. I am wanting to know if there is...

Hi, all. When reviewing stress analysis of tank piping in the annular space filled with perlite insulation, I found it hard to evaluate the load from perlite insulation. The piping is located between inner tank and outer tank. I would assume two loads from perlite: 1. dead weight porportional...

I am reviewing specification of wool blanket used for deck insulation in a cryogenic tank. My question is: 1. Wool blanket is specified with kraft paper on one side and aluminum facing on the other side. Is that common practice? 2. I know that kraft paper and aluminum facing may be of vapor...

One of the design activity in my scope is to design Piping Line Indices. I am not sure what "indices" means here exactly. IMO, It could mean piping class but I am not sure.Please clarify me. Thanks in advance.

How can the design P be determined for a tank ? Tank design P is 2.5psi and tank is for LNG storage. I went over API-620 and did not see the related requirement. Instead , API-620 has minimum wall thickness requirement.Should I calculate from thickness to design pressure and then operating...

16" Cryogenic process line branch out 2" flange ball valve with blind serveing as an high point vent. The process line has insulation. I am asking whether the vent valve should be insulated or not. IMHP, it is a dead end thus as long as the valve located away enough to see cold temperature , it...

When walking down piping,what caused my attention is pipe shoe guide unbalance. Pipe shoe is standard from PT&P. Pipe lateral movement is limited by T-shape welded to structure. Piping stress analysis requested each side 1/4". But as-built pipe shoe is not centered with one side 1/8"- and the...

Valve size varies from 3/4” to 36 in. Valve material is both carbon steel for utility piping and stainless steel valve for cryogenic service and non-cryogenic service. I googled car seal and did not find much options. Some are galvanized CS band which, I think, may not be used for SS valve...

Flange stud bolts have one ending marked with B8 or B7. Is it common to ask vendor to apply marking to differentiate material like A320 or A197? If so, use color coding or stencile ASTM number on it? Thanks.

We have this issue when connecting instrument to tank nozzle. Both flanges are 150# and made of CS A105. Manager think it unacceptable and asked to provide adapter flange with one face RF and the other face FF. I am thinking the connection is OK becasue gasket sealing is the same as between...