[MW:1104] RE: [piping_valves] Cold Bending of SS.304 1.1/2" size pipe / tube

Generally No PFHT  required for SS when cold bending is done (Hot bending is not advisable)

 

-----Original Message-----
From: piping_valves@yahoogroups.com [mailto:piping_valves@yahoogroups.com]On Behalf Of Bathula Raghuram (Mumbai - PIPING)
Sent: Thursday, September 11, 2008 2:07 PM
To: Materials-Welding (E-mail)
Cc: piping_valves@yahoogroups.com; desaid@toyoindia.com
Subject: [piping_valves] Cold Bending of SS.304 1.1/2" size pipe / tube

You may use Table UHA44 (ASME Sec VIII div1) for PFHT requirement, which is most common in HE  U tubing.

Para 331.4.2 not clearly spelt out for P8 material, but there is something called 10% strain limit, which is same as given in UHA44 for 304 material

 

 

From Dhwani Desai........

desaid@toyoindia.com 11/09/2008 03:53

To Kannan.Sundaram@Linde-LE.com cc Subject Cold Bending of SS.304 1.1/2" size pipe / tube

Hi,

Is there any code restriction for doing cold bending of SS-304 (1.1/2") pipe? Any post bending heat treatment required?
31.3 only specifies heat treatment for ferritic steel.

thanks & Regards,
Dhwani

 

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