We do not know the thickness.
However, regarding with your questions 1, 2 and 3 you can get answere on Table: 330.1.1 Preheat Temperatures and 331.1.1 Requirements for treantment, both belong B31.3.
Saludos
L. Carlos Flores
Piping Engineer
Especialidades en Turbo Maquinaria
> Date: Tue, 8 Dec 2009 23:43:33 -0800
> Subject: [MW:3807] Welding of P5A & P5B Material
> From: kc.chavda07@gmail.com
> To: materials-welding@googlegroups.com
>
> Can any body inform about the …..
>
> For the welding of SA 335 Gr. P91 (PNo-5B, Group No-2) Material………
> 1) What is the Preheating Temperature?
> 2) What is the Post heating Temperature & Time ?
> 3) PWHT is require or not ?
> 4) While welding (GTAW) Backing is require if yes, then Argon is OK ?
>
> For the welding of SA 335 Gr. P22 (PNo-5A, Group No-1) Material………
> 1) What is the Preheating Temperature?
> 2) What is the Post heating Temperature & Time ?
> 3) PWHT is require or not ?
> 4) While welding (GTAW) Backing is require if yes, then Argon is OK ?
>
> --
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