RE: Hydrotest....

From: <elie>
Date: Sun Sep 04 2005 - 10:06:00 EDT

where hydro simply couldnt be done or not practicel: use non-destructive examination.

• "Sare, Ralph H." <SARERH@YANPET.SABIC.com> wrote:

> HydroTest : Piping under the ASME B31 Scope
> Three things.
> 1)Hydro for new fab/installation.
> 2)Hydro for piping system already in-service.
> 3)Special case such as hydro related to hot tapping.
>
> A. For new piping such as those in process
> industries, the hydro is done in
> accordance with 345 Testing, Chapter VI of ASME
> b31.3 -2002.
> B. Piping already in-service requiring alteration,
> mods, repair or T&I then
> hydro in accordance with 5.7 Pressure Testing of
> PIping SYstem, API 570
> Piping Inspection Code, Addendum 2, Dec 2001.
> C.Sometimes situation arises where mods, repair or
> alteration will need to
> be completed while the line is in-service
> (on-stream) such as hot tapping.
> In such cases, the hydro is done in accordance with
> Section 6.5 Test the
> weld and hot tapping machine per API 2201 4th Ed,
> Sep 1995 - Procedures for
> Welding/Hot Tapping on Eqpt in Service.
>
> There are instances where hydro simply couldnt be
> done and this is where you
> need the services of a professional engineer.
>
>
>
>
>
> [Non-text portions of this message have been
> removed]
>
>

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