[MW:7884] Re: use of B7 Grade bolts in SS JOBS for HYDROTEST

Sec VIII does not address this issue.

With concurrance of our AI we have hydrostatically tested pvs using B7
bolts and carbon blind flanges.

You should have engineer do calcs on blinds or use a blind flange that
is rated for 40 bar (582 psi).

When using carbon blinds you should protect the carbon from water
contamination. We paint the inside of the blinds to remedy this
contamination.

On Oct 24, 11:14 am, asad azmi <azmiasada...@gmail.com> wrote:
> Dear All,
>
> is it allowed to use Carbon Steel Bolts Grade B7 and temporary carbon steel
> blind flange for Stainless Steel job for Hydrotest bolts.
>
> construction code is ASME SEC VIII DIV1. HYDROTEST TEST PRESSURE IS 40 BAR.
>
> What will the effect OF USING CS BOLTS FOR SS JOB during hydotest in respect
> to SAFETY/DESIGN  ASPECTS.
>
> Pls inform me with respect to code/design reference.
>
> Thanks and regards
>
> asad azmi

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