IS 2062 Gr. A & B - PWHT for storage tank
Makrand Sakpal
Dear all,
I am using IS 2062 Gr. A & B material for tank construction with A 106 Gr. B material for nozzles. Please let me know is clause number 5.7.4.2 of API 650 is applicable here? Shall I do PWHT for all opening connections (nozzles) NPS 12 or larger in nominal diameter?
hwj...@tce.co.in
It is requested that the latest version of IS 2062 be referred to. There are no longer grades named after 'B'. Further the std. no longer supports steels meant for pressure vessels.
your truly
H W JOSHI
ENGINEER MECHANICAL
TATA CONSULTING ENGINEERS LTD
MUMBAI - 400 083
TEL : 022 61148414
| Makrand Sakpal <makr...@gmail.com>
Sent by: material...@googlegroups.com 14-04-2015 08:24
|
|
Dear all,
I am using IS 2062 Gr. A & B material for tank construction with A 106 Gr. B material for nozzles. Please let me know is clause number 5.7.4.2 of API 650 is applicable here? Shall I do PWHT for all opening connections (nozzles) NPS 12 or larger in nominal diameter?
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Asif Raza
Yes dear it is applicable as IS 2062 is equivalent to A36, 2ndly
PWHT is required for the NPS 12, the stress relief shall be
carried out within a temperature range of 600°C – 650°C (1100°F – 1200°F) (see
5.7.4.3 for quenched and tempered materials)
for 1 hour per 25 mm (1 in.) of shell thickness. The assembly shall include the
bottom reinforcing plate (or annular plate) and the
flange-to-neck weld. Also verify it from WPS requirement.
Peter
Welding Engineer
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