Stabilization heat treatment

K.M Hrishikesan

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Apr 1, 2021, 11:14:14 PM4/1/21

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Hi..Need a small help.

Does anybody have an established WPS for stabilization heat treatment?

MOC:

ASTM A 358 TP 347

Specimen thickness is 25 mm.

Thanks.

Vishwas Keskar

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Apr 1, 2021, 11:27:19 PM4/1/21

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Is this Stabilisation is for Pipe to Pipe butt joint ?

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K.M Hrishikesan

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Apr 1, 2021, 11:59:19 PM4/1/21

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Yes.. It is

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Vishwas Keskar

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Apr 4, 2021, 10:36:49 PM4/4/21

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Hope this SS TYP347 piping job .

Stabilisation HT shall be as per below HT cycle

Method of Heat treatment - HT using Electric Resistance Pads suitable to achieve temperature of 1000 Deg C

Loading at or below - 200 Deg C

Rate of Heating - 200 Deg C / hr

Holding temperature - 920 +/- 10 Deg C

Holding time - 125 minutes

Rate of Cooling - Remov Electric Resistance Pads after holding period is over - Forced Air cooling - Use Dry Air Blast

Unloading at or below - Room temperature

Note - The job shall be supported suitably to avoid distortion of PIping spools .

attach thermocouple as per Pipe diameter .

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Rajnish Dixit

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Apr 12, 2021, 12:55:28 AM4/12/21

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Hi,

It is same ordinary WPS like others.

There will be only addition to heat treatment @ 900 degree C for four hours soaking time followed by air quenching (cooling I'm open air).

Thanks,

Rajnish Dixit

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Vishwas Keskar Welding Manager WELDING

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Apr 13, 2021, 10:25:02 PM4/13/21

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As I recall .we had done for 18.26 mm

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