dear sir,
in cat B we follow same location, same procedure, same process but using different welder both are qualified its acceptable.
--Hello Ankit,Please see the extract from Sec-VIII, DIV-2. In this case production test coupon have to be provided for Cat-B joints ( as there're no Cat-A joints in the vessel). Welding may be done concurrently to production welding or prior to or immediately after completion of production weld as agreed with the AI.Thanks.Pradip Goswami, P.Eng,IWEWelding & Metallurgical SpecialistOntario, Canada3.11.8.4
Impact Tests of Vessel Test Platesa) When the base material is required to be impact tested, impact tests of welds and heat affected zones shall be made for Category A and B joints in accordance with paragraph 3.11.8.2 for each qualified welding procedure used on each vessel. The test plate shall be from one of the heats of steel used for the vessel or group of vessels and shall be welded as an extension to the end of a production Category A joint where practicable, or welded as close to the start of production welding as practicable, utilizing equipment, welding materials, and procedures which are to be used on the production joint.
b) For Category B joints that are welded using a different welding procedure than used on Category A joints, a test plate shall be welded under the production welding conditions used for the vessel, using the same type of equipment and at the same location and using the same procedures as used for the joint, and it shall be welded concurrently with the production welds or as close to the start of production welding as practicable.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ankit Gandhi
Sent: Wednesday, October 30, 2013 12:18 PM
To: materials-welding@googlegroups.com
Subject: [MW:19134] REQUIREMENT OF PTCDear experts,--
At presently i am working on a single equipment which construction code is ASME SEC. VIII DIV. 2
Details are as follows:
Shell Material:- SA 765 GR IV
Dish Material:- SA 537 CL. 2
Cladding:- 5 mm (308L)
Thickness:-
Base material:- 133 mm
MDMT 0°C
My question is that i need PTC[Production Test Coupon] or not ??
If yes then How many??
My shell is forged shell so Long seam is not applicable in equipment.
Please Help me over this topic with help of Clause no. of Div.
Regards,
Ankit Gandhi
asgandhi.90@gmail.com
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