Trim 13%Cr+HF and Trim 13%Cr+HFS 1

[ligin18]

Hi
As per our PMS the trim is 13%Cr+HF but vendor offer 13%Cr+HFS. I want to know is both material are same or is it Trim 5(13Cr%+HF) and trim 8 (13%Cr+HFS).Plz help for a solution for this.

 

[MickMc]

Trim 5 & Trim 8, see link for more detail including guidance for services.

http://www.australianpipelinevalve.com.au/lib/Pdf/Trim_number_chart_API_valve.pdf

 

[ligin18]

As per the link it clear that Trim 5 is F6HF and Trim 8 is F6HFS,but as per API 600- 13Cr HF is for trim 8 not for trim 5.Trim 5 is Co-Cr alloy.The trim- 13%Cr+HF & 13%Cr+HFS is same or different.If possible please provide more details for this.

 

[MickMc]

On reflection looking at API 600 it is maybe Trim 4 rather than Trim 5.

HFS is Hard Faced Stellite with Stellite being trademark for Co-Cr as per Note g of API 600 Table 8.

The difference between 2 offers is one is Stellited.

Anyone else?

 

[mmbguide]

hello

when trim(Wedge, Seatring,...) is 13%cr+Stellite in specification, I do not know base material should be 13%cr and we must apply an overlay welding by stellite? or only base material can be A105 and two layer must be applly with 13%cr and then Stelllite after that?

please help me

thank you all

 

[mmbguide]

sorry for repetitive question. i found it in below:

http://www.eng-tips.com/viewthread.cfm?qid=244826