Sunday, September 13, 2009

[MW:3167] RE: 3166] Replacement for "6D Hot-Induction Bend"

I can recommend you try to contact NIRAS (Norsk Industri Rorbojning AS)
in Norway. You will find them on Google.
They run the bending in accordance with certified procedures and are
able to make such bends with basically no reduction in thickness,
because they rather compresses the pipe inner bending diameter, i.e. you
get extra thickness in the inside of the bend.
Regards Kristian

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of ASIF
Sent: 12. september 2009 21:16
To: Materials & Welding
Subject: [MW:3166] Replacement for "6D Hot-Induction Bend"


Dear Brothers!

Project: CrossCountry Pipeline- API 5L GR X60 Dia 8"x6.4mm & API 5L GR
X42 Dia 4"x6.4mm both are PSL 2
Design Pressure 72 bar and Temperature underground 60 degree Celsius
Client: GAIL (India) Limited

Issues:
1. GAIL Required Hot Induction "6D Bends" But their approved Vendors
are not giving response because of less quantity or they are not having
the facility for this type of Bend.

2. We can not go for Cold Bend because the wall thickness of outer
curvature may reduce to unacceptable level

3. Only 7.1mm wall thickness is available for the specified 8" pipe.
As per ANSI B16.9 the maximum tolerance for Thickness reduction is 12.5%
of the WT of Pipe, which is coming around 6.3 mm

kindly suggest the alternatives or the techniques which can give the
Quality or Fit-for-Service Bends

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[MW:34820] RE: 34813] Clarification in Rate of heating and cooling.

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