Re: : API-5D Valves test pressure

From: <adolphus.o.omodu@exxonmobil.com>
Date: Wed Apr 06 2005 - 01:43:00 EDT

It's API 6D not API-5D. API 5D is specification for drill pipes.

Thanks and Regards,

Adolphus O Omodu
Projects Department/Design Engg.
Rm 6A06 Mobil House
Exxonmobil
E-mail: <a href="/group/PipingDesign/post?postID=w0XAlBAFUugKms0qT0CFEBE6OhhMsLnImpR7HKQqJSaP7IJ73v7XK6XxSEg-QQbm28lQ64Unt9ilIFsjiKv8qOiD-0xL0Whq">adolphus.o.omodu@exxonmobil.com</a> Telephone: 234(01)-2621640 Ext. 2524
Telephone: 1-713-431-8500 Ext. 2524

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                       elie altawil
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                                                      Subject: [PipingDesign] :

API-5D Valves test pressure

                       04/06/05 02:05 AM
                       Please respond to
                       PipingDesign

Background Information
API-5D (Table 5.1) gives the minimum shell test pressure for valves as 1.5% of rated MAOP. Example: ANSI Class 150, the min. shell test pressure is 425 psi.

During hydro test of long section of a piping system including valves, we state that the mini. test pressure is 425 psi. Since we cannot maintain the exact pressure, we typically use a range of test pressure, i.e. 425-475 psig, Assuming 100% Yield of pipe is >500 psig.

Question:
What is the maximum pressure that we are allowed to use on the valve?
Where in the Code (and which Code)I can find this information?

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