Re: [Fwd: Ground flush requirement for piping welds.]

From: <mapte@technip.com>
Date: Sun Oct 31 2004 - 00:24:00 EDT

Parag,
All the welds should be ground flush.
I think you are talking about the pre-poly reactor lines. In such type of piping, there should be sufficient flanged joints and the FW or FFW should be on the neck of the flange so that it becomes accessible. There should be no elbows in such lines, the line is to be bent to 5D radius in order to reduce the number of welds. Since this is a very specialized type of piping, contractor needs to be educated.
If necessary a site revision of the isos can be done to revise the note as required.

Have a nice day.
-Mandar.
This message comes from Mandar's desk.

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|         |           Paul Bowers     |

|         |           <pbowers@pipingd|

|         |           esign.com>      |

|         |                           |

|         |           30-10-04 05:07  |

|         |           PM              |

|         |           Please respond  |

|         |           to PipingDesign |

|         |                           |

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<PipingDesign@yahoogroups.com>                                                 |
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   |        Subject: [PipingDesign] [Fwd: Ground flush requirement for piping
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• Original Message -------- Subject: Ground flush requirement for piping welds. Date: Sat, 30 Oct 2004 09:53:50 +0200 From: Kulkarni Parag <KulkarniP@plock.tecnimont.net> To: <pbowers@pipingdesign.com> CC: <PipingDesign@yahoogroups.com>

Dear Paul,

I have joined the group recently and this is my first query. Im at Poland site right now for one of our projects. The query is we have a note for certain process lines on the PID and we put the same note on ths isos but in a different manner....

The note we put on iso was: "for internal weldings ASME B31.3 to be applied if welding can be inspected and welds to be ground flush, otherwise is mandatory the use of tig technology"

I think the note should have been:

1. welds to be ground flush (this is the main requirement) and
2. for internal weldings ASME B31.3 to be applied if welding can be inspected otheriswe is mandatory the use of tig technology.

Now the debate at site is if the welds are unaccessible position in case of field welds, then inspection is not possible and if tig technology is alternatively used then ground flush reqt to be waved off. The quality people from the contractoprs side are saying that we will provide tig technology for all welds and that's all.

We have to give a decision.

Please reply .

Regards,
parag

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