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Hi all, The Slope in steam lines is different (exp 0.5%, 1%, 2% <---- as I see in some projects). But Generally who should decide about the amount of slope (piping or process designer) and how the suffiecient slope is calculated? does any criteria exist to select the piping slope or related to...

Dear all, I want to buy a gate valve with high rating (1500LB) and our client has bben commented us taht this valve should have following condition: 1- Overpressure protection 2- Equalizing valve 3- parallel disk I know Items 2 nad 3, but I didn't get item no.1, should the gate valve have...

Hi I read in some standard that minimum contact pressure to joint of fin to tube is 25 kpsi. if the contact pressure is less than this (for example 5 kpsi) how much heat absorbtion will be deacreasd in finned tube? (assume that there is not mechanical problem like existing of gap between fin and...

Dear thermcool thanks for your reply. this hot water should produce in HRSG. it means we dont produce steam in HRSG.but the most problem is that the inlet water temperature is very low and gas turbine fuel in GASOIL with high sulfure therefore we have acid dewpoint(~120 c) corrosion.we wanted to...

Dear sir, I want to produce hot water using a HRSG. The HRSG should increase the temprature of water from 50C to 160C. The flow rate of needed water is high (about 1500~2000 ton/hr). Can I use a Heat Exchanger like economiser in HRSG? In the other hand, I want to use a HRSG that produces hot...

Hi Dear All, I have some misunderstandings about S.I.F value. 1- What is the S.I.F value for following items and what is the difference between them: • Standard Tee (ASME B16.9) • Unreinforced Tee • Branch connection (stub-in connection) 2- When using the Pipeplus© (Pipepack®) software (V9.3)...

In a CCPP which its fuel is Natural Gas: 1.What is the location of Gas Pressure Reducing Station (GPRS),in another word, What are the parameters which are significant in determination of GPRS location in CCPP layout, like minimum distance from other equipment and its optimum location in site...

In a CCPP which its fuel is Natural Gas: 1.What is the location of Gas Pressure Reducing Station (GPRS),in another word, What are the parameters which are significant in determination of GPRS location in CCPP layout, like minimum distance from other equipment and its optimum location in site...

Hi all, What's The main difference between A335-P22 CL.1, CL.2 AND CL.3 regards, Mehdi Orojlu

Dear Members I'm looking for a comprehensive standard stipulating dimension, tolerance and tests of high frequency resistance welded finned tubes particularly ones are used in HRSG (Heat Recovery Steam Generator). How deep shall be the amount of fusion depth between fin and outer surface of the...

Dear Abeltio Thank you for notification of various aspects.Let me answer some of your questions: -Laydown area is only needed for maintenance. -GT is inside a building. -Temperature range in the site is so wide. -CCPP is equipped with Diverter Damper so CCPP can operate in bypass mode. -HRSG...

The question is that in a combined cycle power plant unit with a 2GT x 2HRSG x 1ST configuration which its gas turbine capacity is 160 MW, what lay down area is required? - What parameters are important and effective in determination of lay down area? - If the number of units with the above...

Dears, I want to know about half coupling and sockolet, and does exist any reference guide about selection of them (difference between them and application) Regards, Mehdi Orojlu

Hello Dears, I Have some questions about Vent Silencers for Saefty Valves: 1. What is the meaning of octave band spectrum? 2. What do PWL and DIL stand for? 3. It is requested to explain me that how I can determine the size of vent pipe (briefly guidance) Your response would be highly...

Dear all As there is no specific standard regarding the distance between Gas Turbines in a power plant what distance is regularly considered for various models and sizes of Gas Turbines? Thank you

Dear friends, It is kindly requested to inform me some information related to application of gag in safety valves. More over I'd like to know that the reason of gag opening due to Hydrostatic test. Sincerely yours

Dear all, I have used self operated pressure/Temperature regulating valves (ERV) in superheated steam line to reduce the pressure or temprature. Do you know any type of ERVs that I can use in saturated steam line? I think if the pressure of saturated steam is decreased, the steam condition...

For piping stress analysis, we consider to Dead weight,Thermal expansion, Earthquake, Wind and Water hammer ,Steam hammer and safety valves reaction forces loadcases and also combination of them. What's the usage of each loadcase and combination of them? Your reply would be appreciated. mehdi...

What's the difference between ASME SEC.I and ASME SEC VIII. exactly?

There is a text file in "nsf" extension. The point is that we can not read the content of this file. Is it possible to read this file in other extensions like "word"?