Re: VALVES RATINGS

From: <Pete>
Date: Sat Aug 17 2002 - 20:48:00 EDT

Mario or anyone,
  I am just curious what does the term "Christmas Tree Equipment " refer to ?   Thanks in advance

Pete

• Original Message ----- From: Mario Roqueta To: PipingDesign@yahoogroups.com Sent: Friday, August 16, 2002 1:11 PM Subject: RE: [PipingDesign] VALVES RATINGS

   Dear Ivan: With reference to API Series 2000/3000/5000/10000/15000/20000 you    can find them in API Spec 6A Specification for Wellhead & Christmas Tree    Equipment. Best regards: Mario Roqueta - ENSI SE - Neuquén - Argentina

   -----Mensaje original-----
   De: Ivan Fernandez [mailto:ifernandez@tecna.com.bo]    Enviado el: Viernes 16 de Agosto de 2002 12:59    Para: PipingDesign@yahoogroups.com
   Asunto: [PipingDesign] VALVES RATINGS

   Avelino BarreiroHi to all,

   About this subject, I have a big confussion, How many Valve Pressure Class    Ratings do we have?.

   I could find:

   ANSI B.16.34 : 125#, 150#, 300#,400#,600#,900#,1500#,2500#    ANSI B.16.1. : 25#,125#,250#,800
   API 602 : 800 - 1500    There is another Pressure Class Rating followed by the initials "CWP" ( See    MSS SP-25 ), it means Cold Working Pressure, and is the maximum pressure    rating allowed under normal "ambient" temperature conditions, (- 29 ºC to    38ºC). According to the MSS SP 25, the initials CWP are used undistinctively    as: ( WO-Water Oil Pressure, OWG-Oil, Water, Gas Pressur,WOG-Water, Oil, Gas    Pressure,GLP-Gas,Liquid Pressure,WWP- Water Working Pressure,W- Water    Pressure). When you have a valve under this pressure rating class, for    example : 150 CWP ( it means that the maximum working pressure is 150 psi @    38ºC).

   But I still have doubts with these ratings showed in catalogs:

   2000, 3000 , 6000 - To which specification corresponds?

   I also found an API Rating: 2000/3000/5000/10 000/20 000, in the catalogs,    but I couldn't find information about them, looking in API publications.

   And also some valves catalogs shows an ANSI 4500. ??

   Please, can someone of you guys help me to clarify this Ratings-matter, in    order to know all the Valves Ratings availiables.

   Thanks in advance.

   Iván Fernández C.

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   Texas Flange - a good source for information on industrial flanges, all they    ask is for referrals for designs they help with.    877-610-8924.
   www.texasflange.com

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   Texas Flange - a good source for information on industrial flanges, all they ask is for referrals for designs they help with.

   877-610-8924.
   www.texasflange.com

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[Non-text portions of this message have been removed] Received on Sat Aug 17 20:48:00 2002