Recent content by smh345

The p/t limits of this material are contained in ASME B16.34 and ASME B31.3. Temp. range -29 deg.C to 425 deg.C. For a class 900 the max. allowable pressure is 153.2 bar.g @ -29 deg.C to 38 deg.C; 150.2 bar.g @ 50 deg.C; 139.1 bar.g @ 100 deg.C. You can interpolate between these temps.

Can anyone supply a spreadsheet or other program for integral flange design calculations to ASME VIII Div. 1 Appx. 2 for cast valves. My email is ajcq13@ukgateway.net. Thanks in advance.

See also: http://www.cranestockham.co.uk They have manufactured valves for such applications in the past.

I am not aware of any national or international standard that determines the level of NDE required. There are many end user specifications that define the level of NDE for various class ratings, a very common one being the Shell MESC specifications. The Shell MESC's are often used by other...

cb4 - valves are selected by class, but they must also meet the wall thickness (WT) requirements per Table 3. If I have a customer asking for valves to meet ASME B16.34 and also to includ a 3mm CA, how should this be addressed? He is asking for the CA as this is a design requirement of the...

ASME B16.34 does not appear to allow for any corrosion allowance in the WT. I know that the WT required per the standard is very conservative and is based on very low stresses. Does any one have any views regarding ASME B16.34 WT and corrosion allowances? Is it necessary to increase the...

ASME B16.34 does not appear to allow for any corrosion allowance in the WT. I know that the WT required per the standard is very conservative and is based on very low stresses. Does any one have any views regarding ASME B16.34 WT and corrosion allowances? Is it necessary to increase the...

CRANE VALVE IN CONROE TEXAS NOW MAKE THE OLD MISSION VALVE.

Waterhammer can be caused from a variety of sources e.g. valves closing or opening too quickly and poor piping layout. Usually it stems from a rapid step change in fluid velocity resulting in a pressure spike and the system needs to be analysed to discover how this could be happening. Normally a...

Thanks again. I did see the formula for pipes but thought there may be someting easier to work with. I guess not! Appreciate your help.

Thanks. I know the Cv for the valve in question (dual-plate check) but need a formula / correction method for two-phase flow. Have already checked 6th Ed. of Perry's - couldn't see anything for valves. Latex - not with you on "multiply and divide..." - can you explain?

Can anyone point me in the right direction? I need an accurate method. Thanks.

I need to calculate the pressure drop for a 2 phase flow application for a check valve. I would normally calculate the combined density and calculate pressure drop based on total combined flow. Are there any other practical and simple ways to accuratly calculate the pressure drop?