Hello JIGNESH
I have attached the requirements of ASME Sec-VIII,DIV-1 and DIV-2 on simulation test coupons.DIV-2 is more specific for simulation heat treatment coupon than DIV-1.From my past experiences in major fabrication shops in India, I came across scenarios where the simulations test coupons had to be procured and tested by the fabricator. Mills may do it ,but at extra cost.
For a service as mentioned below:-
· Material – SA 516 Gr. 70 (HIC tested plates), 132 mm thickness.
· PWHT:- the soaking time is 5.30 Hrs as per project specification. Considering one cycle for future site / modification requirement, the total simulation time works out to be 11 Hrs.
· PWHT Temperature – 620 Deg .C.
· What would be behaviour of material below LOWER TRANSFORMATION TEMPERATURE (P No. 1), against this cycle? (Tensile property, Impact property).
The properties which may change significantly after 11 hrs simulation HT @ 620 Deg C would be charpy impact and hardness test properties. Impact may significantly increase and hardness may reduce so as to stay below the project spec for sour service. Clean chemistry of the steel is very important. The following specifications might be of help to you:-
· NACE –Publication 8 X 194—Materials and Fabrication Practices for New Pressure Vessels used in wet H2S service.
· TM0284-2003-Evaluation of Pipeline and Pressure Vessel Steels-HIC
· NACE Standard TM0103-2003- Laboratory Test Procedures for Evaluation of SOHIC Resistance of Plate Steels Used in Wet H2S Service
Thanks
Pradip Goswami,P.Eng
Senior Engineer/Specialist(Welding-Metallurgy)
Machine Dynamics & Component Integrity Dept.
Engineering & Training Services Division
ONTARIO POWER GENERATION Inc.
PO Box-2000, RR-55(South)
Nanticoke, Ontario,N0A1L0
Tel:-(519) 587-2201, Ext 3107--in Nanticoke
(416) 231-4111, Ext 5925--in Kipling,Toronto
Fax: (519) 587-6814
Sec VIII, DIV-1-UCS-85(h) The simulation of cooling rates for test specimens from non impact tested materials 3 in. and under in thickness is not required for heat treatments below the lower transformation temperature.
Sec VIII, DIV-2-Provisions of Sample Test Coupons
When material is subjected to heat treatment during fabrication, the test specimens required by this Division shall be obtained from sample coupons which have been heat treated in the same manner as the material, including such heat treatments as were applied by the material producer before shipment. The required tests may be performed by the material producer or the fabricator.
From: jignesh.r@thyssenkrupp.com
To: materials-welding@googlegroups.com
Date: Mon, 23 Nov 2009 18:54:08 +0530
Subject: [MW:3715] P No- 1 Material
Dear All,
I have an equipment to be installed in sour services.
Material – SA 516 Gr. 70 (HIC tested plates), 132 mm thickness.
For PWHT the soaking time is 5.30 Hrs as per project specification. Considering one cycle for future site / modification requirement, the total simulation time works out to be 11 Hrs.
PWHT Temperature – 620 Deg .C.
What would be behaviour of material below LOWER TRANSFORMATION TEMPERATURE (P No. 1), against this cycle? (Tensile property, Impact property).
All reputed mills are denying for supply with the simulated testing condition (620 DEG C and 11 Hrs. Soaking Time).
Regards,
JIGNESH R RANA
Messages sent by email can be manipulated by third parties and are therefore generally not legally binding. This message contains confidential information that may be privileged or protected from disclosure. If you are not the intended recipient, please be advised that you have received this email by mistake. You are requested to notify us immediately by return email and delete this email from your system. Any use, copying, distribution or printing of information by the unintended recipient is strictly prohibited. Thank you.
Regd. Office: Uhde House, Vikhroli (West), Mumbai 400 083, India
Tel: 91-022-6796 8000, Fax: 91-022-2578 4327 Website: www.uhdeindia.com
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personnel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
THIS MESSAGE IS ONLY INTENDED FOR THE USE OF THE INTENDED RECIPIENT(S) AND MAY CONTAIN INFORMATION THAT IS PRIVILEGED, PROPRIETARY AND/OR CONFIDENTIAL. If you are not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying, conversion to hard copy or other use of this communication is strictly prohibited. If you are not the intended recipient and have received this message in error, please notify me by return e-mail and delete this message from your system. Ontario Power Generation Inc.
No comments:
Post a Comment