Re: [MW:20324] P22 pipe cutting

If Cr is less than 3%, then flamme cut by oxy-fuel is easily cut

THANKS & BEST REGARDS

KG.PANDITHAN, AWS-CWI, CSWIP 3.1

CONSULTANT-WELDING & QUALITY

On Thu, Mar 13, 2014 at 11:46 AM, Ramin Kondori <raminkondori@gmail.com> wrote:

Dear Binoy:

Preheat is necessary + machining after flame cutting

Do not forget to examine the surface by MT before further application (fit up, welding etc.).

This way, you will detect possible cracks and can grind them out.
 

Regards

Ramin Kondori

Sr. QA/QC Engineer

SINOPEC

r.kondori@petroyada.com
+98-2123592322
+98-9132150320

On Sun, Mar 9, 2014 at 9:44 AM, Himan Nikdin <himan.nikdin@outlook.com> wrote:

Hi

refer to probability of martensite formation during cutting due to carbon content and alloy element of these kind of steels the hardness may increase to 440 VHN (the base metal hardness is 162~168 VHN) and it will cause to cold crack in base metal, so to prohibit this failure 150 °C preheat + machining after cutting is recommended.

Regards,

Himan Nikdin

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Date: Thu, 6 Mar 2014 12:56:39 +0530
Subject: [MW:20242] P22 pipe cutting
From: binoypl3@gmail.com
To: materials-welding@googlegroups.com

Dear All,

Can anyone tell me regarding the cutting of SA 335 P22 pipe cutting procedure.

 

Can we go for Flame cutting or is it mandatory to cut it by Grinding wheel.

Is it mentioned anywhere in standard regarding oxygen flame cutting restriction and the reasons behind this.

If cutting by Oxygen flame is done and if it is not good what corrective action to be taken against this..

--

With Regards
Binoy Lonappan
QAC Engineer
TECCL

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