Dear Mr. Vino,
Please look into the following requirements also.
7.2.2 Impact Tests
7.2.2.1 Impact tests for the qualification of welding procedures
shall comply with the applicable provisions of 2.2.8
and shall be made at or below the design metal temperature.
7.2.2.2 When impact testing of a material is required by
2.2.8, 2.2.9, or 2.5.5, impact tests of the heat-affected zone
shall be made for all automatic and semiautomatic welding
procedures.
7.2.2.3 For all materials to be used at a design metal temperature
below 10°C (50°F), the qualification of the welding
procedure for vertical joints shall include impact tests of the
weld metal. If vertical joints are to be made by an automatic
or semiautomatic process, impact tests of the heat-affected
zone shall also be made.
7.2.2.4 When the design metal temperature is below –7°C
(20°F), impact tests of the weld metal shall be made for all
procedures used for welding the components listed in 2.2.9.1,
for welding attachments to these components, and for fabricating
shell nozzles and manholes from pipe and forgings
listed in 2.5.
7.2.2.5 Impact tests shall show minimum values for acceptance
in accordance with 2.2.8.3 and the following:
a. For P1, Group 1, materials—20 J (15 ft-lbf), average of
three specimens.
b. For P1, Group 2, materials—27 J (20 ft-lbf), average of
three specimens.
c. For P1, Group 3, materials—34 J (25 ft-lbf), average of
three specimens.
For shell plates thicker than 40 mm (11/2 in.), these values
shall be increased by 7 J (5 ft-lbf) for each 12.5 mm (1/2 in.)
over 40 mm (11/2 in.). Interpolation is permitted.
Thanks & Regards,
Ajithkumar. K
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of narasimha murthy
Sent: Saturday, April 28, 2012 4:15 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:14159] API 650 IMPACT TEST REQUIREMENT.
Dear Mr.Vino,
The requirement of Mr.Manoj john was related with the API 650 Tanks, offcourse temperature of -29 Deg Cent shall be considered and is very important for piping / Pipe line also.
Please refer to the fig: 2-1—Minimum Permissible Design Metal Temperature for Materials Used in Tank Shells
Without Impact Testing
Regards,
On Tue, Apr 24, 2012 at 5:16 PM, Vino Varghese <vinopvarghese@gmail.com> wrote:
Dear Sir,
I was in an impression that the impact requirement is governed by Temperature, like - 29 Degree C below... but how does thickness affects the Impact Test?
Can you please through more light for the requirement of Impact Test based on thickness criteria?
Thanks & Regards
Vino-Doha
On Tue, Apr 24, 2012 at 2:16 PM, narasimha murthy <jnm71269@gmail.com> wrote:
As per API 650
2.2.1.4
Shell plates are limited to a maximum thickness of
45 mm (1.75 in.) unless a lesser thickness is stated in this
standard or in the plate specification. Plates used as inserts or
flanges may be thicker than 45 mm (1.75 in.). Plates thicker
than 40 mm (1.5 in.) shall be normalized or quench tempered,
killed, made to fine-grain practice, and impact tested.
Regards,
J.N.Murthy
On Fri, Apr 20, 2012 at 8:59 PM, manoj john <manojacgnr@gmail.com> wrote:
Dear All,
Can anyone give information for the impact test requirement as per API 650 for carbon steel plate thickness for atmospheric storage tank.
Thanks & Regards.
Manoj
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