Re: [MW:18710] Valves with Drain plug...clarrification

Dear Anil
First of all let me brief you that most of the client inspectors do not follow the code and standard they taking decision based on assumptions. So is this valve inspected by clients or its third party inspector at factory before shipment?  If all the documents approved by end user , you can claim for variations and the welding can be done after dismantle all soft part. Then you can do welding as per approved welding procedure. But you can't take design guarantee as per code
Regards
Saji

On 20 Sep 2013 09:28, "jaya anil" <nethalaanil@gmail.com> wrote:

Dear Experts,

We have procured  Carbon Steel Gate Valves (2" to 30") of API 600  with NACE requirements for our offshore project.

Our line pressure & temperature:

Design pressure of GAS Line : 3.5 barg

Design Temperature : 85 Degrees Celsius

operating Temperature : 44.8 to 48 Degrees

Valve Body Material : ASTM A 216 Gr.WCB + NACE

Drain Plug : A 105 + NACE

All the Valves were having Drain plug with Threaded connection.. ( procured as per Approved Drawings & Data Sheets).

As we are going to use these Valves in GAS Line , during Receipt inspection, client commented that drain plug with threaded connection is not acceptable as there may be chance of leaking from this connection in future.

We are clear from our side since all the Valves were Manufactured, tested & Inspected as per Clients Approved GAD & Data Sheets where in,  this connection was shown.

As client requested , Now we have proposed for Seal Welding of this drain connection.

But as i mentioned Valve body is of Casting material, if we perform any Welding , the same should be Heat treated. As we can not leave in AS-Welded condition.

So is there any other alternate solution of sealing of this Valves with out welding or any other solutions with Seal welding & with out Heat treatment.

Please give your valuable suggestions on this subject.

Regards

Anil Kumar

QA/QC Engineer

 

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