Refer API 6A 20 TH ED. UNS N06625: 35 HRC - for latest cladding AS PER MY KNOWLEDGE.
*API CLAUSE 5.5.2 Material qualification testing.
My Motto: Keep calm and never give up.
High pressure drop creates flashing and cavitation relevant with fluid vena-contract. so controlling them by using step wise trim or external sleeve design internal parts.They cannot eliminate but you can control them.
My Motto: Keep calm and never give up.
Check Control Valve Seat Leakage Classifications standard.
*ANSI/FCI 70-2-1991 standard for reference to create leakage class procedure.
My Motto: Keep calm and never give up.
Which API material class requirements for choke valve.
i.e.:- Here is standard for (EE class & temp.-U) Body and Bonnet AISI 4130 material.Needle material PH 17-4 SS & Hard alloy on stem tip.And orifice/Bean/seat form pressure dope 1500 use SS 316,pressure drop +2000 use tungsten carbide.
My...
All design term base work on pressure and temperature class.What kind a service you want to apply?
In API 6A wellhead & Christmas tree equipment as well Choke and kill API 16C standards.
Here PLS1,2,3,3G & 4 shows product specification level.
And PR1,PR2 show products performance level.
TIP:-If...
Check please.
My Motto: Keep calm and never give up.
http://files.engineering.com/getfile.aspx?folder=1868b029-80d9-4c43-b98a-9c4271172adc&file=api_16c-choke_manifold.JPG
Agree to disagree sir.Because "AT engineering solutions ltd" UK company data shows that they did test on as per latest second draft 2009 edition.
Please find the attachment.
My Motto: Keep calm and never give up.
Still in oil & gas market API 16C 1993 First edition?[bigears]
Check draft version of API 16C -2009.[3eyes]
Anybody who have good experience in API products enlighten me.[medal]
My Motto: Keep calm and never give up.
Thank you for reply.
But my question is about equation for calculation break and running torque.I want to design.
Can any body can help me?
My Motto: Keep calm and never give up.
A little help required!!!
I have found out API 16C -2009 draft copy and all hydro static testing parameter is change.So this copy data is valid to use? Which latest addenda available in market? Is it still there 1998 First edition?
My Motto: Keep calm and never give up.
Customer should define working pressure and temperature class.
From that we can follow API 6A for material selection.
Rest material selection follow ASME B16.34.
My Motto: Keep calm and never give up.
API 6A 20th ed.
Maximum hardness
Material Maximum hardness
Soft iron - 56 HRB
Carbon and low alloys - 68 HRB
Stainless steel - 83 HRB
Nickel alloy UNS N08825 - 92 HRB
*Other CRAs Hardness shall meet manufacturer's
written specification.
My Mott: Stay calm and never give up.
Any body who had work in this type control valves design concern.[medal]
I want to know how to calculate break torque & running torque with formula.
Is is Open Thrust (lbs) = (Stem cross section are in inch)X(Line pressure)x(Packing load) + (Seat area)x(Valve factor)x(pressure drop difference)...
Okay! only the reason is i had use old API 16C edition and now i had checked in 2009 edition found that test pressure has been revised form 10000 psi to 7500 psi for choke manifold assembly hydro-static testing.
So now i have to only resubmit my design as per latest edition.
What else any other...
First thank you sir.[smile2]
Second i had tested whole choke manifold assembly 3 1/8" x 5000 psi according API 16C procedure ,but test pressure was 7500 psi and due to old API 16C first edition (1998).
So i get N.C only reason is API mention 10000 psi testing for 5000 psi choke manifold.
And...
I have couple of issue with my previous API16C certificate getting regarding.
In my choke manifold design 3 1/8"-5K sizes 2-positive chokes and 3-gate valves and 2-spools and studded tees.
I did hydro static teste choke manifold on 7500psi...
